Text search (#1603, #1739)

Add text search:
* named property search
* all-property search
* regex search
* aggregation over search results

Text search works with:
* non-parallel transactions
* durability (WAL files and snapshots)
* multitenancy

include/_mgp.hpp

@@ -326,6 +326,21 @@ inline mgp_vertex *graph_get_vertex_by_id(mgp_graph *g, mgp_vertex_id id, mgp_me
   return MgInvoke<mgp_vertex *>(mgp_graph_get_vertex_by_id, g, id, memory);
 }
 
+inline bool graph_has_text_index(mgp_graph *graph, const char *index_name) {
+  return MgInvoke<int>(mgp_graph_has_text_index, graph, index_name);
+}
+
+inline mgp_map *graph_search_text_index(mgp_graph *graph, const char *index_name, const char *search_query,
+                                        text_search_mode search_mode, mgp_memory *memory) {
+  return MgInvoke<mgp_map *>(mgp_graph_search_text_index, graph, index_name, search_query, search_mode, memory);
+}
+
+inline mgp_map *graph_aggregate_over_text_index(mgp_graph *graph, const char *index_name, const char *search_query,
+                                                const char *aggregation_query, mgp_memory *memory) {
+  return MgInvoke<mgp_map *>(mgp_graph_aggregate_over_text_index, graph, index_name, search_query, aggregation_query,
+                             memory);
+}
+
 inline mgp_vertices_iterator *graph_iter_vertices(mgp_graph *g, mgp_memory *memory) {
   return MgInvoke<mgp_vertices_iterator *>(mgp_graph_iter_vertices, g, memory);
 }

include/mg_procedure.h

@@ -1,4 +1,4 @@
-// Copyright 2023 Memgraph Ltd.
+// Copyright 2024 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -891,6 +891,36 @@ enum mgp_error mgp_edge_iter_properties(struct mgp_edge *e, struct mgp_memory *m
 enum mgp_error mgp_graph_get_vertex_by_id(struct mgp_graph *g, struct mgp_vertex_id id, struct mgp_memory *memory,
                                           struct mgp_vertex **result);
 
+/// Result is non-zero if the index with the given name exists.
+/// The current implementation always returns without errors.
+enum mgp_error mgp_graph_has_text_index(struct mgp_graph *graph, const char *index_name, int *result);
+
+/// Available modes of searching text indices.
+MGP_ENUM_CLASS text_search_mode{
+    SPECIFIED_PROPERTIES,
+    REGEX,
+    ALL_PROPERTIES,
+};
+
+/// Search the named text index for the given query. The result is a map with the "search_results" and "error_msg" keys.
+/// The "search_results" key contains the vertices whose text-indexed properties match the given query.
+/// In case of a Tantivy error, the "search_results" key is absent, and "error_msg" contains the error message.
+/// Return mgp_error::MGP_ERROR_UNABLE_TO_ALLOCATE if there’s an allocation error while constructing the results map.
+/// Return mgp_error::MGP_ERROR_KEY_ALREADY_EXISTS if the same key is being created in the results map more than once.
+enum mgp_error mgp_graph_search_text_index(struct mgp_graph *graph, const char *index_name, const char *search_query,
+                                           enum text_search_mode search_mode, struct mgp_memory *memory,
+                                           struct mgp_map **result);
+
+/// Aggregate over the results of a search over the named text index. The result is a map with the "aggregation_results"
+/// and "error_msg" keys.
+/// The "aggregation_results" key contains the vertices whose text-indexed properties match the given query.
+/// In case of a Tantivy error, the "aggregation_results" key is absent, and "error_msg" contains the error message.
+/// Return mgp_error::MGP_ERROR_UNABLE_TO_ALLOCATE if there’s an allocation error while constructing the results map.
+/// Return mgp_error::MGP_ERROR_KEY_ALREADY_EXISTS if the same key is being created in the results map more than once.
+enum mgp_error mgp_graph_aggregate_over_text_index(struct mgp_graph *graph, const char *index_name,
+                                                   const char *search_query, const char *aggregation_query,
+                                                   struct mgp_memory *memory, struct mgp_map **result);
+
 /// Creates label index for given label.
 /// mgp_error::MGP_ERROR_NO_ERROR is always returned.
 /// if label index already exists, result will be 0, otherwise 1.

include/mgp.hpp

@@ -1,4 +1,4 @@
-// Copyright 2023 Memgraph Ltd.
+// Copyright 2024 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -32,6 +32,15 @@
 
 namespace mgp {
 
+class TextSearchException : public std::exception {
+ public:
+  explicit TextSearchException(std::string message) : message_(std::move(message)) {}
+  const char *what() const noexcept override { return message_.c_str(); }
+
+ private:
+  std::string message_;
+};
+
 class IndexException : public std::exception {
  public:
   explicit IndexException(std::string message) : message_(std::move(message)) {}
@@ -4306,12 +4315,12 @@ inline void AddParamsReturnsToProc(mgp_proc *proc, std::vector<Parameter> &param
 }
 }  // namespace detail
 
-inline bool CreateLabelIndex(mgp_graph *memgaph_graph, const std::string_view label) {
+inline bool CreateLabelIndex(mgp_graph *memgraph_graph, const std::string_view label) {
-  return create_label_index(memgaph_graph, label.data());
+  return create_label_index(memgraph_graph, label.data());
 }
 
-inline bool DropLabelIndex(mgp_graph *memgaph_graph, const std::string_view label) {
+inline bool DropLabelIndex(mgp_graph *memgraph_graph, const std::string_view label) {
-  return drop_label_index(memgaph_graph, label.data());
+  return drop_label_index(memgraph_graph, label.data());
 }
 
 inline List ListAllLabelIndices(mgp_graph *memgraph_graph) {
@@ -4322,14 +4331,14 @@ inline List ListAllLabelIndices(mgp_graph *memgraph_graph) {
   return List(label_indices);
 }
 
-inline bool CreateLabelPropertyIndex(mgp_graph *memgaph_graph, const std::string_view label,
+inline bool CreateLabelPropertyIndex(mgp_graph *memgraph_graph, const std::string_view label,
                                      const std::string_view property) {
-  return create_label_property_index(memgaph_graph, label.data(), property.data());
+  return create_label_property_index(memgraph_graph, label.data(), property.data());
 }
 
-inline bool DropLabelPropertyIndex(mgp_graph *memgaph_graph, const std::string_view label,
+inline bool DropLabelPropertyIndex(mgp_graph *memgraph_graph, const std::string_view label,
                                    const std::string_view property) {
-  return drop_label_property_index(memgaph_graph, label.data(), property.data());
+  return drop_label_property_index(memgraph_graph, label.data(), property.data());
 }
 
 inline List ListAllLabelPropertyIndices(mgp_graph *memgraph_graph) {
@@ -4340,6 +4349,58 @@ inline List ListAllLabelPropertyIndices(mgp_graph *memgraph_graph) {
   return List(label_property_indices);
 }
 
+namespace {
+constexpr std::string_view kErrorMsgKey = "error_msg";
+constexpr std::string_view kSearchResultsKey = "search_results";
+constexpr std::string_view kAggregationResultsKey = "aggregation_results";
+}  // namespace
+
+inline List SearchTextIndex(mgp_graph *memgraph_graph, std::string_view index_name, std::string_view search_query,
+                            text_search_mode search_mode) {
+  auto results_or_error = Map(mgp::MemHandlerCallback(graph_search_text_index, memgraph_graph, index_name.data(),
+                                                      search_query.data(), search_mode));
+  if (results_or_error.KeyExists(kErrorMsgKey)) {
+    if (!results_or_error.At(kErrorMsgKey).IsString()) {
+      throw TextSearchException{"The error message is not a string!"};
+    }
+    throw TextSearchException(results_or_error.At(kErrorMsgKey).ValueString().data());
+  }
+
+  if (!results_or_error.KeyExists(kSearchResultsKey)) {
+    throw TextSearchException{"Incomplete text index search results!"};
+  }
+
+  if (!results_or_error.At(kSearchResultsKey).IsList()) {
+    throw TextSearchException{"Text index search results have wrong type!"};
+  }
+
+  return results_or_error.At(kSearchResultsKey).ValueList();
+}
+
+inline std::string_view AggregateOverTextIndex(mgp_graph *memgraph_graph, std::string_view index_name,
+                                               std::string_view search_query, std::string_view aggregation_query) {
+  auto results_or_error =
+      Map(mgp::MemHandlerCallback(graph_aggregate_over_text_index, memgraph_graph, index_name.data(),
+                                  search_query.data(), aggregation_query.data()));
+
+  if (results_or_error.KeyExists(kErrorMsgKey)) {
+    if (!results_or_error.At(kErrorMsgKey).IsString()) {
+      throw TextSearchException{"The error message is not a string!"};
+    }
+    throw TextSearchException(results_or_error.At(kErrorMsgKey).ValueString().data());
+  }
+
+  if (!results_or_error.KeyExists(kAggregationResultsKey)) {
+    throw TextSearchException{"Incomplete text index aggregation results!"};
+  }
+
+  if (!results_or_error.At(kAggregationResultsKey).IsString()) {
+    throw TextSearchException{"Text index aggregation results have wrong type!"};
+  }
+
+  return results_or_error.At(kAggregationResultsKey).ValueString();
+}
+
 inline bool CreateExistenceConstraint(mgp_graph *memgraph_graph, const std::string_view label,
                                       const std::string_view property) {
   return create_existence_constraint(memgraph_graph, label.data(), property.data());

libs/CMakeLists.txt

@@ -295,6 +295,32 @@ set_path_external_library(jemalloc STATIC
 
 import_header_library(rangev3 ${CMAKE_CURRENT_SOURCE_DIR}/rangev3/include)
 
+ExternalProject_Add(mgcxx-proj
+  PREFIX         mgcxx-proj
+  GIT_REPOSITORY https://github.com/memgraph/mgcxx
+  GIT_TAG        "v0.0.4"
+  CMAKE_ARGS
+    "-DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>"
+    "-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
+    "-DENABLE_TESTS=OFF"
+  INSTALL_DIR    "${PROJECT_BINARY_DIR}/mgcxx"
+)
+ExternalProject_Get_Property(mgcxx-proj install_dir)
+set(MGCXX_ROOT ${install_dir})
+
+add_library(tantivy_text_search STATIC IMPORTED GLOBAL)
+add_dependencies(tantivy_text_search mgcxx-proj)
+set_property(TARGET tantivy_text_search PROPERTY IMPORTED_LOCATION ${MGCXX_ROOT}/lib/libtantivy_text_search.a)
+
+add_library(mgcxx_text_search STATIC IMPORTED GLOBAL)
+add_dependencies(mgcxx_text_search mgcxx-proj)
+set_property(TARGET mgcxx_text_search PROPERTY IMPORTED_LOCATION ${MGCXX_ROOT}/lib/libmgcxx_text_search.a)
+# We need to create the include directory first in order to be able to add it
+# as an include directory. The header files in the include directory will be
+# generated later during the build process.
+file(MAKE_DIRECTORY ${MGCXX_ROOT}/include)
+set_property(TARGET mgcxx_text_search PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${MGCXX_ROOT}/include)
+
 # Setup NuRaft
 import_external_library(nuraft STATIC
   ${CMAKE_CURRENT_SOURCE_DIR}/nuraft/lib/libnuraft.a

query_modules/CMakeLists.txt

@@ -6,6 +6,8 @@ project(memgraph_query_modules)
 
 disallow_in_source_build()
 
+find_package(fmt REQUIRED)
+
 # Everything that is installed here, should be under the "query_modules" component.
 set(CMAKE_INSTALL_DEFAULT_COMPONENT_NAME "query_modules")
 string(TOLOWER ${CMAKE_BUILD_TYPE} lower_build_type)
@@ -58,6 +60,22 @@ install(PROGRAMS $<TARGET_FILE:schema>
 # Also install the source of the example, so user can read it.
 install(FILES schema.cpp DESTINATION lib/memgraph/query_modules/src)
 
+add_library(text SHARED text_search_module.cpp)
+target_include_directories(text PRIVATE ${CMAKE_SOURCE_DIR}/include)
+target_compile_options(text PRIVATE -Wall)
+target_link_libraries(text PRIVATE -static-libgcc -static-libstdc++ fmt::fmt)
+# Strip C++ example in release build.
+if (lower_build_type STREQUAL "release")
+  add_custom_command(TARGET text POST_BUILD
+                     COMMAND strip -s $<TARGET_FILE:text>
+                     COMMENT "Stripping symbols and sections from the C++ text_search module")
+endif()
+install(PROGRAMS $<TARGET_FILE:text>
+        DESTINATION lib/memgraph/query_modules
+        RENAME text.so)
+# Also install the source of the example, so user can read it.
+install(FILES text_search_module.cpp DESTINATION lib/memgraph/query_modules/src)
+
 # Install the Python example and modules
 install(FILES example.py DESTINATION lib/memgraph/query_modules RENAME py_example.py)
 install(FILES graph_analyzer.py DESTINATION lib/memgraph/query_modules)

query_modules/text_search_module.cpp

@@ -0,0 +1,149 @@
+// Copyright 2024 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+#include <string>
+#include <string_view>
+
+#include <fmt/format.h>
+
+#include <mgp.hpp>
+
+namespace TextSearch {
+constexpr std::string_view kProcedureSearch = "search";
+constexpr std::string_view kProcedureRegexSearch = "regex_search";
+constexpr std::string_view kProcedureSearchAllProperties = "search_all";
+constexpr std::string_view kProcedureAggregate = "aggregate";
+constexpr std::string_view kParameterIndexName = "index_name";
+constexpr std::string_view kParameterSearchQuery = "search_query";
+constexpr std::string_view kParameterAggregationQuery = "aggregation_query";
+constexpr std::string_view kReturnNode = "node";
+constexpr std::string_view kReturnAggregation = "aggregation";
+const std::string kSearchAllPrefix = "all";
+
+void Search(mgp_list *args, mgp_graph *memgraph_graph, mgp_result *result, mgp_memory *memory);
+void RegexSearch(mgp_list *args, mgp_graph *memgraph_graph, mgp_result *result, mgp_memory *memory);
+void SearchAllProperties(mgp_list *args, mgp_graph *memgraph_graph, mgp_result *result, mgp_memory *memory);
+void Aggregate(mgp_list *args, mgp_graph *memgraph_graph, mgp_result *result, mgp_memory *memory);
+}  // namespace TextSearch
+
+void TextSearch::Search(mgp_list *args, mgp_graph *memgraph_graph, mgp_result *result, mgp_memory *memory) {
+  mgp::MemoryDispatcherGuard guard{memory};
+  const auto record_factory = mgp::RecordFactory(result);
+  auto arguments = mgp::List(args);
+
+  try {
+    const auto *index_name = arguments[0].ValueString().data();
+    const auto *search_query = arguments[1].ValueString().data();
+    for (const auto &node :
+         mgp::SearchTextIndex(memgraph_graph, index_name, search_query, text_search_mode::SPECIFIED_PROPERTIES)) {
+      auto record = record_factory.NewRecord();
+      record.Insert(TextSearch::kReturnNode.data(), node.ValueNode());
+    }
+  } catch (const std::exception &e) {
+    record_factory.SetErrorMessage(e.what());
+  }
+}
+
+void TextSearch::RegexSearch(mgp_list *args, mgp_graph *memgraph_graph, mgp_result *result, mgp_memory *memory) {
+  mgp::MemoryDispatcherGuard guard{memory};
+  const auto record_factory = mgp::RecordFactory(result);
+  auto arguments = mgp::List(args);
+
+  try {
+    const auto *index_name = arguments[0].ValueString().data();
+    const auto *search_query = arguments[1].ValueString().data();
+    for (const auto &node : mgp::SearchTextIndex(memgraph_graph, index_name, search_query, text_search_mode::REGEX)) {
+      auto record = record_factory.NewRecord();
+      record.Insert(TextSearch::kReturnNode.data(), node.ValueNode());
+    }
+  } catch (const std::exception &e) {
+    record_factory.SetErrorMessage(e.what());
+  }
+}
+
+void TextSearch::SearchAllProperties(mgp_list *args, mgp_graph *memgraph_graph, mgp_result *result,
+                                     mgp_memory *memory) {
+  mgp::MemoryDispatcherGuard guard{memory};
+  const auto record_factory = mgp::RecordFactory(result);
+  auto arguments = mgp::List(args);
+
+  try {
+    const auto *index_name = arguments[0].ValueString().data();
+    const auto *search_query = fmt::format("{}:{}", kSearchAllPrefix, arguments[1].ValueString()).data();
+    for (const auto &node :
+         mgp::SearchTextIndex(memgraph_graph, index_name, search_query, text_search_mode::ALL_PROPERTIES)) {
+      auto record = record_factory.NewRecord();
+      record.Insert(TextSearch::kReturnNode.data(), node.ValueNode());
+    }
+  } catch (const std::exception &e) {
+    record_factory.SetErrorMessage(e.what());
+  }
+}
+
+void TextSearch::Aggregate(mgp_list *args, mgp_graph *memgraph_graph, mgp_result *result, mgp_memory *memory) {
+  mgp::MemoryDispatcherGuard guard{memory};
+  const auto record_factory = mgp::RecordFactory(result);
+  auto arguments = mgp::List(args);
+
+  try {
+    const auto *index_name = arguments[0].ValueString().data();
+    const auto *search_query = arguments[1].ValueString().data();
+    const auto *aggregation_query = arguments[2].ValueString().data();
+    const auto aggregation_result =
+        mgp::AggregateOverTextIndex(memgraph_graph, index_name, search_query, aggregation_query);
+    auto record = record_factory.NewRecord();
+    record.Insert(TextSearch::kReturnAggregation.data(), aggregation_result.data());
+  } catch (const std::exception &e) {
+    record_factory.SetErrorMessage(e.what());
+  }
+}
+
+extern "C" int mgp_init_module(struct mgp_module *module, struct mgp_memory *memory) {
+  try {
+    mgp::MemoryDispatcherGuard guard{memory};
+
+    AddProcedure(TextSearch::Search, TextSearch::kProcedureSearch, mgp::ProcedureType::Read,
+                 {
+                     mgp::Parameter(TextSearch::kParameterIndexName, mgp::Type::String),
+                     mgp::Parameter(TextSearch::kParameterSearchQuery, mgp::Type::String),
+                 },
+                 {mgp::Return(TextSearch::kReturnNode, mgp::Type::Node)}, module, memory);
+
+    AddProcedure(TextSearch::RegexSearch, TextSearch::kProcedureRegexSearch, mgp::ProcedureType::Read,
+                 {
+                     mgp::Parameter(TextSearch::kParameterIndexName, mgp::Type::String),
+                     mgp::Parameter(TextSearch::kParameterSearchQuery, mgp::Type::String),
+                 },
+                 {mgp::Return(TextSearch::kReturnNode, mgp::Type::Node)}, module, memory);
+
+    AddProcedure(TextSearch::SearchAllProperties, TextSearch::kProcedureSearchAllProperties, mgp::ProcedureType::Read,
+                 {
+                     mgp::Parameter(TextSearch::kParameterIndexName, mgp::Type::String),
+                     mgp::Parameter(TextSearch::kParameterSearchQuery, mgp::Type::String),
+                 },
+                 {mgp::Return(TextSearch::kReturnNode, mgp::Type::Node)}, module, memory);
+
+    AddProcedure(TextSearch::Aggregate, TextSearch::kProcedureAggregate, mgp::ProcedureType::Read,
+                 {
+                     mgp::Parameter(TextSearch::kParameterIndexName, mgp::Type::String),
+                     mgp::Parameter(TextSearch::kParameterSearchQuery, mgp::Type::String),
+                     mgp::Parameter(TextSearch::kParameterAggregationQuery, mgp::Type::String),
+                 },
+                 {mgp::Return(TextSearch::kReturnAggregation, mgp::Type::String)}, module, memory);
+  } catch (const std::exception &e) {
+    std::cerr << "Error while initializing query module: " << e.what() << std::endl;
+    return 1;
+  }
+
+  return 0;
+}
+
+extern "C" int mgp_shutdown_module() { return 0; }

src/CMakeLists.txt

@@ -45,7 +45,7 @@ set(mg_single_node_v2_sources
 add_executable(memgraph ${mg_single_node_v2_sources})
 target_include_directories(memgraph PUBLIC ${CMAKE_SOURCE_DIR}/include)
 target_link_libraries(memgraph stdc++fs Threads::Threads
-        mg-telemetry mg-communication mg-communication-metrics mg-memory mg-utils mg-license mg-settings mg-glue mg-flags mg::system mg::replication_handler)
+        mg-telemetry mgcxx_text_search tantivy_text_search mg-communication mg-communication-metrics mg-memory mg-utils mg-license mg-settings mg-glue mg-flags mg::system mg::replication_handler)
 
 # NOTE: `include/mg_procedure.syms` describes a pattern match for symbols which
 # should be dynamically exported, so that `dlopen` can correctly link th

src/dbms/dbms_handler.hpp

@@ -311,7 +311,7 @@ class DbmsHandler {
         stats.triggers += info.triggers;
         stats.streams += info.streams;
         ++stats.num_databases;
-        stats.indices += storage_info.label_indices + storage_info.label_property_indices;
+        stats.indices += storage_info.label_indices + storage_info.label_property_indices + storage_info.text_indices;
         stats.constraints += storage_info.existence_constraints + storage_info.unique_constraints;
         ++stats.storage_modes[(int)storage_info.storage_mode];
         ++stats.isolation_levels[(int)storage_info.isolation_level];

src/dbms/inmemory/replication_handlers.cpp

@@ -615,6 +615,7 @@ uint64_t InMemoryReplicationHandlers::ReadAndApplyDelta(storage::InMemoryStorage
         auto vertex = transaction->FindVertex(delta.vertex_add_remove_label.gid, View::NEW);
         if (!vertex)
           throw utils::BasicException("Invalid transaction! Please raise an issue, {}:{}", __FILE__, __LINE__);
+        // NOTE: Text search doesn’t have replication in scope yet (Phases 1 and 2)
         auto ret = vertex->AddLabel(transaction->NameToLabel(delta.vertex_add_remove_label.label));
         if (ret.HasError() || !ret.GetValue())
           throw utils::BasicException("Invalid transaction! Please raise an issue, {}:{}", __FILE__, __LINE__);
@@ -627,6 +628,7 @@ uint64_t InMemoryReplicationHandlers::ReadAndApplyDelta(storage::InMemoryStorage
         auto vertex = transaction->FindVertex(delta.vertex_add_remove_label.gid, View::NEW);
         if (!vertex)
           throw utils::BasicException("Invalid transaction! Please raise an issue, {}:{}", __FILE__, __LINE__);
+        // NOTE: Text search doesn’t have replication in scope yet (Phases 1 and 2)
         auto ret = vertex->RemoveLabel(transaction->NameToLabel(delta.vertex_add_remove_label.label));
         if (ret.HasError() || !ret.GetValue())
           throw utils::BasicException("Invalid transaction! Please raise an issue, {}:{}", __FILE__, __LINE__);
@@ -640,6 +642,7 @@ uint64_t InMemoryReplicationHandlers::ReadAndApplyDelta(storage::InMemoryStorage
         auto vertex = transaction->FindVertex(delta.vertex_edge_set_property.gid, View::NEW);
         if (!vertex)
           throw utils::BasicException("Invalid transaction! Please raise an issue, {}:{}", __FILE__, __LINE__);
+        // NOTE: Phase 1 of the text search feature doesn't have replication in scope
         auto ret = vertex->SetProperty(transaction->NameToProperty(delta.vertex_edge_set_property.property),
                                        delta.vertex_edge_set_property.value);
         if (ret.HasError())
@@ -853,6 +856,14 @@ uint64_t InMemoryReplicationHandlers::ReadAndApplyDelta(storage::InMemoryStorage
           throw utils::BasicException("Invalid transaction! Please raise an issue, {}:{}", __FILE__, __LINE__);
         break;
       }
+      case WalDeltaData::Type::TEXT_INDEX_CREATE: {
+        // NOTE: Text search doesn’t have replication in scope yet (Phases 1 and 2)
+        break;
+      }
+      case WalDeltaData::Type::TEXT_INDEX_DROP: {
+        // NOTE: Text search doesn’t have replication in scope yet (Phases 1 and 2)
+        break;
+      }
       case WalDeltaData::Type::EXISTENCE_CONSTRAINT_CREATE: {
         spdlog::trace("       Create existence constraint on :{} ({})", delta.operation_label_property.label,
                       delta.operation_label_property.property);

src/flags/experimental.cpp

@@ -18,14 +18,15 @@
 
 // Bolt server flags.
 // NOLINTNEXTLINE (cppcoreguidelines-avoid-non-const-global-variables)
-DEFINE_string(experimental_enabled, "",
+DEFINE_string(
-              "Experimental features to be used, comma seperated. Options [system-replication, high-availability]");
+    experimental_enabled, "",
-
+    "Experimental features to be used, comma-separated. Options [system-replication, text-search, high-availability]");
 using namespace std::string_view_literals;
 
 namespace memgraph::flags {
 
 auto const mapping = std::map{std::pair{"system-replication"sv, Experiments::SYSTEM_REPLICATION},
+                              std::pair{"text-search"sv, Experiments::TEXT_SEARCH},
                               std::pair{"high-availability"sv, Experiments::HIGH_AVAILABILITY}};
 
 auto ExperimentsInstance() -> Experiments & {
@@ -45,7 +46,7 @@ bool AreExperimentsEnabled(Experiments experiments) {
 void InitializeExperimental() {
   namespace rv = ranges::views;
 
-  auto const connonicalize_string = [](auto &&rng) {
+  auto const canonicalize_string = [](auto &&rng) {
     auto const is_space = [](auto c) { return c == ' '; };
     auto const to_lower = [](unsigned char c) { return std::tolower(c); };
 
@@ -56,7 +57,7 @@ void InitializeExperimental() {
   auto const mapping_end = mapping.cend();
   using underlying_type = std::underlying_type_t<Experiments>;
   auto to_set = underlying_type{};
-  for (auto &&experiment : FLAGS_experimental_enabled | rv::split(',') | rv::transform(connonicalize_string)) {
+  for (auto &&experiment : FLAGS_experimental_enabled | rv::split(',') | rv::transform(canonicalize_string)) {
     if (auto it = mapping.find(experiment); it != mapping_end) {
       to_set |= static_cast<underlying_type>(it->second);
     }

src/flags/experimental.hpp

@@ -23,7 +23,8 @@ namespace memgraph::flags {
 // old experiments can be reused once code cleanup has happened
 enum class Experiments : uint8_t {
   SYSTEM_REPLICATION = 1 << 0,
-  HIGH_AVAILABILITY = 1 << 1,
+  TEXT_SEARCH = 1 << 1,
+  HIGH_AVAILABILITY = 1 << 2,
 };
 
 bool AreExperimentsEnabled(Experiments experiments);

src/flags/run_time_configurable.cpp

@@ -1,4 +1,4 @@
-// Copyright 2023 Memgraph Ltd.
+// Copyright 2024 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -73,11 +73,11 @@ constexpr auto kLogToStderrGFlagsKey = "also_log_to_stderr";
 constexpr auto kCartesianProductEnabledSettingKey = "cartesian-product-enabled";
 constexpr auto kCartesianProductEnabledGFlagsKey = "cartesian-product-enabled";
 
-// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
+// NOLINTBEGIN(cppcoreguidelines-avoid-non-const-global-variables)
-std::atomic<double> execution_timeout_sec_;  // Local cache-like thing
+// Local cache-like thing
-
+std::atomic<double> execution_timeout_sec_;
-// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables)
+std::atomic<bool> cartesian_product_enabled_{true};
-std::atomic<bool> cartesian_product_enabled_{true};  // Local cache-like thing
+// NOLINTEND(cppcoreguidelines-avoid-non-const-global-variables)
 
 auto ToLLEnum(std::string_view val) {
   const auto ll_enum = memgraph::flags::LogLevelToEnum(val);

src/flags/run_time_configurable.hpp

@@ -1,4 +1,4 @@
-// Copyright 2023 Memgraph Ltd.
+// Copyright 2024 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source

src/query/db_accessor.hpp

@@ -634,6 +634,24 @@ class DbAccessor final {
 
   bool EdgeTypeIndexExists(storage::EdgeTypeId edge_type) const { return accessor_->EdgeTypeIndexExists(edge_type); }
 
+  bool TextIndexExists(const std::string &index_name) const { return accessor_->TextIndexExists(index_name); }
+
+  void TextIndexAddVertex(const VertexAccessor &vertex) { accessor_->TextIndexAddVertex(vertex.impl_); }
+
+  void TextIndexUpdateVertex(const VertexAccessor &vertex, const std::vector<storage::LabelId> &removed_labels = {}) {
+    accessor_->TextIndexUpdateVertex(vertex.impl_, removed_labels);
+  }
+
+  std::vector<storage::Gid> TextIndexSearch(const std::string &index_name, const std::string &search_query,
+                                            text_search_mode search_mode) const {
+    return accessor_->TextIndexSearch(index_name, search_query, search_mode);
+  }
+
+  std::string TextIndexAggregate(const std::string &index_name, const std::string &search_query,
+                                 const std::string &aggregation_query) const {
+    return accessor_->TextIndexAggregate(index_name, search_query, aggregation_query);
+  }
+
   std::optional<storage::LabelIndexStats> GetIndexStats(const storage::LabelId &label) const {
     return accessor_->GetIndexStats(label);
   }
@@ -717,6 +735,12 @@ class DbAccessor final {
     return accessor_->DropIndex(edge_type);
   }
 
+  void CreateTextIndex(const std::string &index_name, storage::LabelId label) {
+    accessor_->CreateTextIndex(index_name, label, this);
+  }
+
+  void DropTextIndex(const std::string &index_name) { accessor_->DropTextIndex(index_name); }
+
   utils::BasicResult<storage::StorageExistenceConstraintDefinitionError, void> CreateExistenceConstraint(
       storage::LabelId label, storage::PropertyId property) {
     return accessor_->CreateExistenceConstraint(label, property);

src/query/dump.cpp

@@ -252,6 +252,10 @@ void DumpLabelPropertyIndex(std::ostream *os, query::DbAccessor *dba, storage::L
       << ");";
 }
 
+void DumpTextIndex(std::ostream *os, query::DbAccessor *dba, const std::string &index_name, storage::LabelId label) {
+  *os << "CREATE TEXT INDEX " << EscapeName(index_name) << " ON :" << EscapeName(dba->LabelToName(label)) << ";";
+}
+
 void DumpExistenceConstraint(std::ostream *os, query::DbAccessor *dba, storage::LabelId label,
                              storage::PropertyId property) {
   *os << "CREATE CONSTRAINT ON (u:" << EscapeName(dba->LabelToName(label)) << ") ASSERT EXISTS (u."
@@ -286,6 +290,8 @@ PullPlanDump::PullPlanDump(DbAccessor *dba, dbms::DatabaseAccess db_acc)
                    CreateLabelIndicesPullChunk(),
                    // Dump all label property indices
                    CreateLabelPropertyIndicesPullChunk(),
+                   // Dump all text indices
+                   CreateTextIndicesPullChunk(),
                    // Dump all existence constraints
                    CreateExistenceConstraintsPullChunk(),
                    // Dump all unique constraints
@@ -412,6 +418,34 @@ PullPlanDump::PullChunk PullPlanDump::CreateLabelPropertyIndicesPullChunk() {
   };
 }
 
+PullPlanDump::PullChunk PullPlanDump::CreateTextIndicesPullChunk() {
+  // Dump all text indices
+  return [this, global_index = 0U](AnyStream *stream, std::optional<int> n) mutable -> std::optional<size_t> {
+    // Delay the construction of indices vectors
+    if (!indices_info_) {
+      indices_info_.emplace(dba_->ListAllIndices());
+    }
+    const auto &text = indices_info_->text_indices;
+
+    size_t local_counter = 0;
+    while (global_index < text.size() && (!n || local_counter < *n)) {
+      std::ostringstream os;
+      const auto &text_index = text[global_index];
+      DumpTextIndex(&os, dba_, text_index.first, text_index.second);
+      stream->Result({TypedValue(os.str())});
+
+      ++global_index;
+      ++local_counter;
+    }
+
+    if (global_index == text.size()) {
+      return local_counter;
+    }
+
+    return std::nullopt;
+  };
+}
+
 PullPlanDump::PullChunk PullPlanDump::CreateExistenceConstraintsPullChunk() {
   return [this, global_index = 0U](AnyStream *stream, std::optional<int> n) mutable -> std::optional<size_t> {
     // Delay the construction of constraint vectors

src/query/dump.hpp

@@ -55,6 +55,7 @@ struct PullPlanDump {
 
   PullChunk CreateLabelIndicesPullChunk();
   PullChunk CreateLabelPropertyIndicesPullChunk();
+  PullChunk CreateTextIndicesPullChunk();
   PullChunk CreateExistenceConstraintsPullChunk();
   PullChunk CreateUniqueConstraintsPullChunk();
   PullChunk CreateInternalIndexPullChunk();

src/query/exceptions.hpp

@@ -433,4 +433,17 @@ class MultiDatabaseQueryInMulticommandTxException : public QueryException {
   SPECIALIZE_GET_EXCEPTION_NAME(MultiDatabaseQueryInMulticommandTxException)
 };
 
+class TextSearchException : public QueryException {
+  using QueryException::QueryException;
+  SPECIALIZE_GET_EXCEPTION_NAME(TextSearchException)
+};
+
+class TextSearchDisabledException : public TextSearchException {
+ public:
+  TextSearchDisabledException()
+      : TextSearchException(
+            "To use text indices and text search, start Memgraph with the experimental text search feature enabled.") {}
+  SPECIALIZE_GET_EXCEPTION_NAME(TextSearchDisabledException)
+};
+
 }  // namespace memgraph::query

src/query/frontend/ast/ast.cpp

@@ -189,6 +189,9 @@ constexpr utils::TypeInfo query::IndexQuery::kType{utils::TypeId::AST_INDEX_QUER
 constexpr utils::TypeInfo query::EdgeIndexQuery::kType{utils::TypeId::AST_EDGE_INDEX_QUERY, "EdgeIndexQuery",
                                                        &query::Query::kType};
 
+constexpr utils::TypeInfo query::TextIndexQuery::kType{utils::TypeId::AST_TEXT_INDEX_QUERY, "TextIndexQuery",
+                                                       &query::Query::kType};
+
 constexpr utils::TypeInfo query::Create::kType{utils::TypeId::AST_CREATE, "Create", &query::Clause::kType};
 
 constexpr utils::TypeInfo query::CallProcedure::kType{utils::TypeId::AST_CALL_PROCEDURE, "CallProcedure",

src/query/frontend/ast/ast.hpp

@@ -2273,6 +2273,37 @@ class EdgeIndexQuery : public memgraph::query::Query {
   friend class AstStorage;
 };
 
+class TextIndexQuery : public memgraph::query::Query {
+ public:
+  static const utils::TypeInfo kType;
+  const utils::TypeInfo &GetTypeInfo() const override { return kType; }
+
+  enum class Action { CREATE, DROP };
+
+  TextIndexQuery() = default;
+
+  DEFVISITABLE(QueryVisitor<void>);
+
+  memgraph::query::TextIndexQuery::Action action_;
+  memgraph::query::LabelIx label_;
+  std::string index_name_;
+
+  TextIndexQuery *Clone(AstStorage *storage) const override {
+    TextIndexQuery *object = storage->Create<TextIndexQuery>();
+    object->action_ = action_;
+    object->label_ = storage->GetLabelIx(label_.name);
+    object->index_name_ = index_name_;
+    return object;
+  }
+
+ protected:
+  TextIndexQuery(Action action, LabelIx label, std::string index_name)
+      : action_(action), label_(std::move(label)), index_name_(index_name) {}
+
+ private:
+  friend class AstStorage;
+};
+
 class Create : public memgraph::query::Clause {
  public:
   static const utils::TypeInfo kType;

src/query/frontend/ast/ast_visitor.hpp

@@ -83,6 +83,7 @@ class ExplainQuery;
 class ProfileQuery;
 class IndexQuery;
 class EdgeIndexQuery;
+class TextIndexQuery;
 class DatabaseInfoQuery;
 class SystemInfoQuery;
 class ConstraintQuery;
@@ -144,11 +145,11 @@ class ExpressionVisitor
 
 template <class TResult>
 class QueryVisitor
-    : public utils::Visitor<TResult, CypherQuery, ExplainQuery, ProfileQuery, IndexQuery, EdgeIndexQuery, AuthQuery,
+    : public utils::Visitor<TResult, CypherQuery, ExplainQuery, ProfileQuery, IndexQuery, EdgeIndexQuery,
-                            DatabaseInfoQuery, SystemInfoQuery, ConstraintQuery, DumpQuery, ReplicationQuery,
+                            TextIndexQuery, AuthQuery, DatabaseInfoQuery, SystemInfoQuery, ConstraintQuery, DumpQuery,
-                            LockPathQuery, FreeMemoryQuery, TriggerQuery, IsolationLevelQuery, CreateSnapshotQuery,
+                            ReplicationQuery, LockPathQuery, FreeMemoryQuery, TriggerQuery, IsolationLevelQuery,
-                            StreamQuery, SettingQuery, VersionQuery, ShowConfigQuery, TransactionQueueQuery,
+                            CreateSnapshotQuery, StreamQuery, SettingQuery, VersionQuery, ShowConfigQuery,
-                            StorageModeQuery, AnalyzeGraphQuery, MultiDatabaseQuery, ShowDatabasesQuery,
+                            TransactionQueueQuery, StorageModeQuery, AnalyzeGraphQuery, MultiDatabaseQuery,
-                            EdgeImportModeQuery, CoordinatorQuery> {};
+                            ShowDatabasesQuery, EdgeImportModeQuery, CoordinatorQuery> {};
 
 }  // namespace memgraph::query

src/query/frontend/ast/cypher_main_visitor.cpp

@@ -243,6 +243,13 @@ antlrcpp::Any CypherMainVisitor::visitIndexQuery(MemgraphCypher::IndexQueryConte
   return index_query;
 }
 
+antlrcpp::Any CypherMainVisitor::visitTextIndexQuery(MemgraphCypher::TextIndexQueryContext *ctx) {
+  MG_ASSERT(ctx->children.size() == 1, "TextIndexQuery should have exactly one child!");
+  auto *text_index_query = std::any_cast<TextIndexQuery *>(ctx->children[0]->accept(this));
+  query_ = text_index_query;
+  return text_index_query;
+}
+
 antlrcpp::Any CypherMainVisitor::visitCreateIndex(MemgraphCypher::CreateIndexContext *ctx) {
   auto *index_query = storage_->Create<IndexQuery>();
   index_query->action_ = IndexQuery::Action::CREATE;
@@ -286,6 +293,21 @@ antlrcpp::Any CypherMainVisitor::visitDropEdgeIndex(MemgraphCypher::DropEdgeInde
   return index_query;
 }
 
+antlrcpp::Any CypherMainVisitor::visitCreateTextIndex(MemgraphCypher::CreateTextIndexContext *ctx) {
+  auto *index_query = storage_->Create<TextIndexQuery>();
+  index_query->index_name_ = std::any_cast<std::string>(ctx->indexName()->accept(this));
+  index_query->action_ = TextIndexQuery::Action::CREATE;
+  index_query->label_ = AddLabel(std::any_cast<std::string>(ctx->labelName()->accept(this)));
+  return index_query;
+}
+
+antlrcpp::Any CypherMainVisitor::visitDropTextIndex(MemgraphCypher::DropTextIndexContext *ctx) {
+  auto *index_query = storage_->Create<TextIndexQuery>();
+  index_query->index_name_ = std::any_cast<std::string>(ctx->indexName()->accept(this));
+  index_query->action_ = TextIndexQuery::Action::DROP;
+  return index_query;
+}
+
 antlrcpp::Any CypherMainVisitor::visitAuthQuery(MemgraphCypher::AuthQueryContext *ctx) {
   MG_ASSERT(ctx->children.size() == 1, "AuthQuery should have exactly one child!");
   auto *auth_query = std::any_cast<AuthQuery *>(ctx->children[0]->accept(this));

src/query/frontend/ast/cypher_main_visitor.hpp

@@ -153,6 +153,11 @@ class CypherMainVisitor : public antlropencypher::MemgraphCypherBaseVisitor {
    */
   antlrcpp::Any visitEdgeIndexQuery(MemgraphCypher::EdgeIndexQueryContext *ctx) override;
 
+  /**
+   * @return TextIndexQuery*
+   */
+  antlrcpp::Any visitTextIndexQuery(MemgraphCypher::TextIndexQueryContext *ctx) override;
+
   /**
    * @return ExplainQuery*
    */
@@ -500,7 +505,7 @@ class CypherMainVisitor : public antlropencypher::MemgraphCypherBaseVisitor {
   antlrcpp::Any visitCreateIndex(MemgraphCypher::CreateIndexContext *ctx) override;
 
   /**
-   * @return DropIndex*
+   * @return IndexQuery*
    */
   antlrcpp::Any visitDropIndex(MemgraphCypher::DropIndexContext *ctx) override;
 
@@ -514,6 +519,16 @@ class CypherMainVisitor : public antlropencypher::MemgraphCypherBaseVisitor {
    */
   antlrcpp::Any visitDropEdgeIndex(MemgraphCypher::DropEdgeIndexContext *ctx) override;
 
+  /**
+   * @return TextIndexQuery*
+   */
+  antlrcpp::Any visitCreateTextIndex(MemgraphCypher::CreateTextIndexContext *ctx) override;
+
+  /**
+   * @return TextIndexQuery*
+   */
+  antlrcpp::Any visitDropTextIndex(MemgraphCypher::DropTextIndexContext *ctx) override;
+
   /**
    * @return AuthQuery*
    */

src/query/frontend/opencypher/grammar/Cypher.g4

@@ -25,6 +25,7 @@ statement : query ;
 
 query : cypherQuery
       | indexQuery
+      | textIndexQuery
       | explainQuery
       | profileQuery
       | databaseInfoQuery
@@ -65,6 +66,8 @@ cypherQuery : singleQuery ( cypherUnion )* ( queryMemoryLimit )? ;
 
 indexQuery : createIndex | dropIndex;
 
+textIndexQuery : createTextIndex | dropTextIndex;
+
 singleQuery : clause ( clause )* ;
 
 cypherUnion : ( UNION ALL singleQuery )
@@ -342,6 +345,12 @@ createIndex : CREATE INDEX ON ':' labelName ( '(' propertyKeyName ')' )? ;
 
 dropIndex : DROP INDEX ON ':' labelName ( '(' propertyKeyName ')' )? ;
 
+indexName : symbolicName ;
+
+createTextIndex : CREATE TEXT INDEX indexName ON ':' labelName ;
+
+dropTextIndex : DROP TEXT INDEX indexName ;
+
 doubleLiteral : FloatingLiteral ;
 
 cypherKeyword : ALL

src/query/frontend/opencypher/grammar/CypherLexer.g4

@@ -131,6 +131,7 @@ SHOW           : S H O W ;
 SINGLE         : S I N G L E ;
 STARTS         : S T A R T S ;
 STORAGE        : S T O R A G E ;
+TEXT           : T E X T ;
 THEN           : T H E N ;
 TRUE           : T R U E ;
 UNION          : U N I O N ;

src/query/frontend/opencypher/grammar/MemgraphCypher.g4

@@ -134,6 +134,7 @@ symbolicName : UnescapedSymbolicName
 query : cypherQuery
       | indexQuery
       | edgeIndexQuery
+      | textIndexQuery
       | explainQuery
       | profileQuery
       | databaseInfoQuery

src/query/frontend/semantic/required_privileges.cpp

@@ -29,6 +29,8 @@ class PrivilegeExtractor : public QueryVisitor<void>, public HierarchicalTreeVis
 
   void Visit(EdgeIndexQuery & /*unused*/) override { AddPrivilege(AuthQuery::Privilege::INDEX); }
 
+  void Visit(TextIndexQuery & /*unused*/) override { AddPrivilege(AuthQuery::Privilege::INDEX); }
+
   void Visit(AnalyzeGraphQuery & /*unused*/) override { AddPrivilege(AuthQuery::Privilege::INDEX); }
 
   void Visit(AuthQuery & /*unused*/) override { AddPrivilege(AuthQuery::Privilege::AUTH); }

src/query/frontend/semantic/symbol.hpp

@@ -1,4 +1,4 @@
-// Copyright 2023 Memgraph Ltd.
+// Copyright 2024 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source

src/query/interpreter.cpp

@@ -39,6 +39,7 @@
 #include "dbms/dbms_handler.hpp"
 #include "dbms/global.hpp"
 #include "dbms/inmemory/storage_helper.hpp"
+#include "flags/experimental.hpp"
 #include "flags/replication.hpp"
 #include "flags/run_time_configurable.hpp"
 #include "glue/communication.hpp"
@@ -2709,6 +2710,75 @@ PreparedQuery PrepareEdgeIndexQuery(ParsedQuery parsed_query, bool in_explicit_t
       RWType::W};
 }
 
+PreparedQuery PrepareTextIndexQuery(ParsedQuery parsed_query, bool in_explicit_transaction,
+                                    std::vector<Notification> *notifications, CurrentDB &current_db) {
+  if (in_explicit_transaction) {
+    throw IndexInMulticommandTxException();
+  }
+
+  auto *text_index_query = utils::Downcast<TextIndexQuery>(parsed_query.query);
+  std::function<void(Notification &)> handler;
+
+  // TODO: we will need transaction for replication
+  MG_ASSERT(current_db.db_acc_, "Text index query expects a current DB");
+  auto &db_acc = *current_db.db_acc_;
+
+  MG_ASSERT(current_db.db_transactional_accessor_, "Text index query expects a current DB transaction");
+  auto *dba = &*current_db.execution_db_accessor_;
+
+  // Creating an index influences computed plan costs.
+  auto invalidate_plan_cache = [plan_cache = db_acc->plan_cache()] {
+    plan_cache->WithLock([&](auto &cache) { cache.reset(); });
+  };
+
+  auto *storage = db_acc->storage();
+  auto label = storage->NameToLabel(text_index_query->label_.name);
+  auto &index_name = text_index_query->index_name_;
+
+  Notification index_notification(SeverityLevel::INFO);
+  switch (text_index_query->action_) {
+    case TextIndexQuery::Action::CREATE: {
+      index_notification.code = NotificationCode::CREATE_INDEX;
+      index_notification.title = fmt::format("Created text index on label {}.", text_index_query->label_.name);
+      // TODO: not just storage + invalidate_plan_cache. Need a DB transaction (for replication)
+      handler = [dba, label, index_name,
+                 invalidate_plan_cache = std::move(invalidate_plan_cache)](Notification &index_notification) {
+        if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+          throw TextSearchDisabledException();
+        }
+        dba->CreateTextIndex(index_name, label);
+        utils::OnScopeExit invalidator(invalidate_plan_cache);
+      };
+      break;
+    }
+    case TextIndexQuery::Action::DROP: {
+      index_notification.code = NotificationCode::DROP_INDEX;
+      index_notification.title = fmt::format("Dropped text index on label {}.", text_index_query->label_.name);
+      // TODO: not just storage + invalidate_plan_cache. Need a DB transaction (for replication)
+      handler = [dba, index_name,
+                 invalidate_plan_cache = std::move(invalidate_plan_cache)](Notification &index_notification) {
+        if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+          throw TextSearchDisabledException();
+        }
+        dba->DropTextIndex(index_name);
+        utils::OnScopeExit invalidator(invalidate_plan_cache);
+      };
+      break;
+    }
+  }
+
+  return PreparedQuery{
+      {},
+      std::move(parsed_query.required_privileges),
+      [handler = std::move(handler), notifications, index_notification = std::move(index_notification)](
+          AnyStream * /*stream*/, std::optional<int> /*unused*/) mutable {
+        handler(index_notification);
+        notifications->push_back(index_notification);
+        return QueryHandlerResult::COMMIT;  // TODO: Will need to become COMMIT when we fix replication
+      },
+      RWType::W};
+}
+
 PreparedQuery PrepareAuthQuery(ParsedQuery parsed_query, bool in_explicit_transaction,
                                InterpreterContext *interpreter_context, Interpreter &interpreter) {
   if (in_explicit_transaction) {
@@ -3499,7 +3569,7 @@ PreparedQuery PrepareDatabaseInfoQuery(ParsedQuery parsed_query, bool in_explici
   }
 
   MG_ASSERT(current_db.db_acc_, "Database info query expects a current DB");
-  MG_ASSERT(current_db.db_transactional_accessor_, "Database ifo query expects a current DB transaction");
+  MG_ASSERT(current_db.db_transactional_accessor_, "Database info query expects a current DB transaction");
   auto *dba = &*current_db.execution_db_accessor_;
 
   auto *info_query = utils::Downcast<DatabaseInfoQuery>(parsed_query.query);
@@ -3514,10 +3584,11 @@ PreparedQuery PrepareDatabaseInfoQuery(ParsedQuery parsed_query, bool in_explici
         const std::string_view label_index_mark{"label"};
         const std::string_view label_property_index_mark{"label+property"};
         const std::string_view edge_type_index_mark{"edge-type"};
+        const std::string_view text_index_mark{"text"};
         auto info = dba->ListAllIndices();
         auto storage_acc = database->Access();
         std::vector<std::vector<TypedValue>> results;
-        results.reserve(info.label.size() + info.label_property.size());
+        results.reserve(info.label.size() + info.label_property.size() + info.text_indices.size());
         for (const auto &item : info.label) {
           results.push_back({TypedValue(label_index_mark), TypedValue(storage->LabelToName(item)), TypedValue(),
                              TypedValue(static_cast<int>(storage_acc->ApproximateVertexCount(item)))});
@@ -3532,6 +3603,10 @@ PreparedQuery PrepareDatabaseInfoQuery(ParsedQuery parsed_query, bool in_explici
           results.push_back({TypedValue(edge_type_index_mark), TypedValue(storage->EdgeTypeToName(item)), TypedValue(),
                              TypedValue(static_cast<int>(storage_acc->ApproximateEdgeCount(item)))});
         }
+        for (const auto &[index_name, label] : info.text_indices) {
+          results.push_back({TypedValue(fmt::format("{} (name: {})", text_index_mark, index_name)),
+                             TypedValue(storage->LabelToName(label)), TypedValue(), TypedValue()});
+        }
         std::sort(results.begin(), results.end(), [&label_index_mark](const auto &record_1, const auto &record_2) {
           const auto type_1 = record_1[0].ValueString();
           const auto type_2 = record_2[0].ValueString();
@@ -4293,13 +4368,15 @@ Interpreter::PrepareResult Interpreter::Prepare(const std::string &query_string,
         utils::Downcast<ProfileQuery>(parsed_query.query) || utils::Downcast<DumpQuery>(parsed_query.query) ||
         utils::Downcast<TriggerQuery>(parsed_query.query) || utils::Downcast<AnalyzeGraphQuery>(parsed_query.query) ||
         utils::Downcast<IndexQuery>(parsed_query.query) || utils::Downcast<EdgeIndexQuery>(parsed_query.query) ||
-        utils::Downcast<DatabaseInfoQuery>(parsed_query.query) || utils::Downcast<ConstraintQuery>(parsed_query.query);
+        utils::Downcast<TextIndexQuery>(parsed_query.query) || utils::Downcast<DatabaseInfoQuery>(parsed_query.query) ||
+        utils::Downcast<ConstraintQuery>(parsed_query.query);
 
     if (!in_explicit_transaction_ && requires_db_transaction) {
       // TODO: ATM only a single database, will change when we have multiple database transactions
       bool could_commit = utils::Downcast<CypherQuery>(parsed_query.query) != nullptr;
       bool unique = utils::Downcast<IndexQuery>(parsed_query.query) != nullptr ||
                     utils::Downcast<EdgeIndexQuery>(parsed_query.query) != nullptr ||
+                    utils::Downcast<TextIndexQuery>(parsed_query.query) != nullptr ||
                     utils::Downcast<ConstraintQuery>(parsed_query.query) != nullptr ||
                     upper_case_query.find(kSchemaAssert) != std::string::npos;
       SetupDatabaseTransaction(could_commit, unique);
@@ -4337,6 +4414,9 @@ Interpreter::PrepareResult Interpreter::Prepare(const std::string &query_string,
     } else if (utils::Downcast<EdgeIndexQuery>(parsed_query.query)) {
       prepared_query = PrepareEdgeIndexQuery(std::move(parsed_query), in_explicit_transaction_,
                                              &query_execution->notifications, current_db_);
+    } else if (utils::Downcast<TextIndexQuery>(parsed_query.query)) {
+      prepared_query = PrepareTextIndexQuery(std::move(parsed_query), in_explicit_transaction_,
+                                             &query_execution->notifications, current_db_);
     } else if (utils::Downcast<AnalyzeGraphQuery>(parsed_query.query)) {
       prepared_query = PrepareAnalyzeGraphQuery(std::move(parsed_query), in_explicit_transaction_, current_db_);
     } else if (utils::Downcast<AuthQuery>(parsed_query.query)) {

src/query/plan/operator.cpp

@@ -32,6 +32,7 @@
 #include "spdlog/spdlog.h"
 
 #include "csv/parsing.hpp"
+#include "flags/experimental.hpp"
 #include "license/license.hpp"
 #include "query/auth_checker.hpp"
 #include "query/context.hpp"
@@ -266,6 +267,10 @@ VertexAccessor &CreateLocalVertex(const NodeCreationInfo &node_info, Frame *fram
   }
   MultiPropsInitChecked(&new_node, properties);
 
+  if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    context.db_accessor->TextIndexAddVertex(new_node);
+  }
+
   (*frame)[node_info.symbol] = new_node;
   return (*frame)[node_info.symbol].ValueVertex();
 }
@@ -2991,6 +2996,9 @@ bool SetProperty::SetPropertyCursor::Pull(Frame &frame, ExecutionContext &contex
         context.trigger_context_collector->RegisterSetObjectProperty(lhs.ValueVertex(), self_.property_,
                                                                      TypedValue{std::move(old_value)}, TypedValue{rhs});
       }
+      if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+        context.db_accessor->TextIndexUpdateVertex(lhs.ValueVertex());
+      }
       break;
     }
     case TypedValue::Type::Edge: {
@@ -3147,6 +3155,9 @@ void SetPropertiesOnRecord(TRecordAccessor *record, const TypedValue &rhs, SetPr
     case TypedValue::Type::Vertex: {
       PropertiesMap new_properties = get_props(rhs.ValueVertex());
       update_props(new_properties);
+      if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+        context->db_accessor->TextIndexUpdateVertex(rhs.ValueVertex());
+      }
       break;
     }
     case TypedValue::Type::Map: {
@@ -3204,6 +3215,9 @@ bool SetProperties::SetPropertiesCursor::Pull(Frame &frame, ExecutionContext &co
       }
 #endif
       SetPropertiesOnRecord(&lhs.ValueVertex(), rhs, self_.op_, &context, cached_name_id_);
+      if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+        context.db_accessor->TextIndexUpdateVertex(lhs.ValueVertex());
+      }
       break;
     case TypedValue::Type::Edge:
 #ifdef MG_ENTERPRISE
@@ -3295,6 +3309,10 @@ bool SetLabels::SetLabelsCursor::Pull(Frame &frame, ExecutionContext &context) {
     }
   }
 
+  if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    context.db_accessor->TextIndexUpdateVertex(vertex);
+  }
+
   return true;
 }
 
@@ -3366,6 +3384,9 @@ bool RemoveProperty::RemovePropertyCursor::Pull(Frame &frame, ExecutionContext &
       }
 #endif
       remove_prop(&lhs.ValueVertex());
+      if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+        context.db_accessor->TextIndexUpdateVertex(lhs.ValueVertex());
+      }
       break;
     case TypedValue::Type::Edge:
 #ifdef MG_ENTERPRISE
@@ -3458,6 +3479,10 @@ bool RemoveLabels::RemoveLabelsCursor::Pull(Frame &frame, ExecutionContext &cont
     }
   }
 
+  if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    context.db_accessor->TextIndexUpdateVertex(vertex, EvaluateLabels(self_.labels_, evaluator, context.db_accessor));
+  }
+
   return true;
 }
 

src/query/plan/vertex_count_cache.hpp

@@ -1,4 +1,4 @@
-// Copyright 2023 Memgraph Ltd.
+// Copyright 2024 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source

src/query/procedure/mg_procedure_impl.cpp

@@ -23,6 +23,8 @@
 #include <utility>
 #include <variant>
 
+#include "flags/experimental.hpp"
+#include "flags/run_time_configurable.hpp"
 #include "license/license.hpp"
 #include "mg_procedure.h"
 #include "module.hpp"
@@ -32,6 +34,7 @@
 #include "query/procedure/fmt.hpp"
 #include "query/procedure/mg_procedure_helpers.hpp"
 #include "query/stream/common.hpp"
+#include "storage/v2/indices/text_index.hpp"
 #include "storage/v2/property_value.hpp"
 #include "storage/v2/storage_mode.hpp"
 #include "storage/v2/view.hpp"
@@ -1843,6 +1846,11 @@ mgp_error mgp_vertex_set_property(struct mgp_vertex *v, const char *property_nam
     const auto result = std::visit(
         [prop_key, property_value](auto &impl) { return impl.SetProperty(prop_key, ToPropertyValue(*property_value)); },
         v->impl);
+    if (memgraph::flags::AreExperimentsEnabled(memgraph::flags::Experiments::TEXT_SEARCH) && !result.HasError()) {
+      auto v_impl = v->getImpl();
+      v->graph->getImpl()->TextIndexUpdateVertex(v_impl);
+    }
+
     if (result.HasError()) {
       switch (result.GetError()) {
         case memgraph::storage::Error::DELETED_OBJECT:
@@ -1899,6 +1907,11 @@ mgp_error mgp_vertex_set_properties(struct mgp_vertex *v, struct mgp_map *proper
     }
 
     const auto result = v->getImpl().UpdateProperties(props);
+    if (memgraph::flags::AreExperimentsEnabled(memgraph::flags::Experiments::TEXT_SEARCH) && !result.HasError()) {
+      auto v_impl = v->getImpl();
+      v->graph->getImpl()->TextIndexUpdateVertex(v_impl);
+    }
+
     if (result.HasError()) {
       switch (result.GetError()) {
         case memgraph::storage::Error::DELETED_OBJECT:
@@ -1956,6 +1969,10 @@ mgp_error mgp_vertex_add_label(struct mgp_vertex *v, mgp_label label) {
     }
 
     const auto result = std::visit([label_id](auto &impl) { return impl.AddLabel(label_id); }, v->impl);
+    if (memgraph::flags::AreExperimentsEnabled(memgraph::flags::Experiments::TEXT_SEARCH) && !result.HasError()) {
+      auto v_impl = v->getImpl();
+      v->graph->getImpl()->TextIndexUpdateVertex(v_impl);
+    }
 
     if (result.HasError()) {
       switch (result.GetError()) {
@@ -1998,6 +2015,10 @@ mgp_error mgp_vertex_remove_label(struct mgp_vertex *v, mgp_label label) {
       throw ImmutableObjectException{"Cannot remove a label from an immutable vertex!"};
     }
     const auto result = std::visit([label_id](auto &impl) { return impl.RemoveLabel(label_id); }, v->impl);
+    if (memgraph::flags::AreExperimentsEnabled(memgraph::flags::Experiments::TEXT_SEARCH) && !result.HasError()) {
+      auto v_impl = v->getImpl();
+      v->graph->getImpl()->TextIndexUpdateVertex(v_impl, {label_id});
+    }
 
     if (result.HasError()) {
       switch (result.GetError()) {
@@ -2590,7 +2611,7 @@ mgp_error mgp_edge_iter_properties(mgp_edge *e, mgp_memory *memory, mgp_properti
 mgp_error mgp_graph_get_vertex_by_id(mgp_graph *graph, mgp_vertex_id id, mgp_memory *memory, mgp_vertex **result) {
   return WrapExceptions(
       [graph, id, memory]() -> mgp_vertex * {
-        std::optional<memgraph::query::VertexAccessor> maybe_vertex = std::visit(
+        auto maybe_vertex = std::visit(
             [graph, id](auto *impl) {
               return impl->FindVertex(memgraph::storage::Gid::FromInt(id.as_int), graph->view);
             },
@@ -2967,6 +2988,10 @@ mgp_error mgp_graph_create_vertex(struct mgp_graph *graph, mgp_memory *memory, m
         }
         auto *vertex = std::visit(
             [=](auto *impl) { return NewRawMgpObject<mgp_vertex>(memory, impl->InsertVertex(), graph); }, graph->impl);
+        if (memgraph::flags::AreExperimentsEnabled(memgraph::flags::Experiments::TEXT_SEARCH)) {
+          auto v_impl = vertex->getImpl();
+          vertex->graph->getImpl()->TextIndexAddVertex(v_impl);
+        }
 
         auto &ctx = graph->ctx;
         ctx->execution_stats[memgraph::query::ExecutionStats::Key::CREATED_NODES] += 1;
@@ -3324,6 +3349,140 @@ mgp_error mgp_graph_delete_edge(struct mgp_graph *graph, mgp_edge *edge) {
   });
 }
 
+mgp_error mgp_graph_has_text_index(mgp_graph *graph, const char *index_name, int *result) {
+  return WrapExceptions([graph, index_name, result]() {
+    std::visit(memgraph::utils::Overloaded{
+                   [&](memgraph::query::DbAccessor *impl) { *result = impl->TextIndexExists(index_name); },
+                   [&](memgraph::query::SubgraphDbAccessor *impl) {
+                     *result = impl->GetAccessor()->TextIndexExists(index_name);
+                   }},
+               graph->impl);
+  });
+}
+
+mgp_vertex *GetVertexByGid(mgp_graph *graph, memgraph::storage::Gid id, mgp_memory *memory) {
+  auto get_vertex_by_gid = memgraph::utils::Overloaded{
+      [graph, id, memory](memgraph::query::DbAccessor *impl) -> mgp_vertex * {
+        auto maybe_vertex = impl->FindVertex(id, graph->view);
+        if (!maybe_vertex) return nullptr;
+        return NewRawMgpObject<mgp_vertex>(memory, *maybe_vertex, graph);
+      },
+      [graph, id, memory](memgraph::query::SubgraphDbAccessor *impl) -> mgp_vertex * {
+        auto maybe_vertex = impl->FindVertex(id, graph->view);
+        if (!maybe_vertex) return nullptr;
+        return NewRawMgpObject<mgp_vertex>(
+            memory, memgraph::query::SubgraphVertexAccessor(*maybe_vertex, impl->getGraph()), graph);
+      }};
+  return std::visit(get_vertex_by_gid, graph->impl);
+}
+
+void WrapTextSearch(mgp_graph *graph, mgp_memory *memory, mgp_map **result,
+                    const std::vector<memgraph::storage::Gid> &vertex_ids = {},
+                    const std::optional<std::string> &error_msg = std::nullopt) {
+  if (const auto err = mgp_map_make_empty(memory, result); err != mgp_error::MGP_ERROR_NO_ERROR) {
+    throw std::logic_error("Retrieving text search results failed during creation of a mgp_map");
+  }
+
+  mgp_value *error_value;
+  if (error_msg.has_value()) {
+    if (const auto err = mgp_value_make_string(error_msg.value().data(), memory, &error_value);
+        err != mgp_error::MGP_ERROR_NO_ERROR) {
+      throw std::logic_error("Retrieving text search results failed during creation of a string mgp_value");
+    }
+  }
+
+  mgp_list *search_results{};
+  if (const auto err = mgp_list_make_empty(vertex_ids.size(), memory, &search_results);
+      err != mgp_error::MGP_ERROR_NO_ERROR) {
+    throw std::logic_error("Retrieving text search results failed during creation of a mgp_list");
+  }
+
+  for (const auto &vertex_id : vertex_ids) {
+    mgp_value *vertex;
+    if (const auto err = mgp_value_make_vertex(GetVertexByGid(graph, vertex_id, memory), &vertex);
+        err != mgp_error::MGP_ERROR_NO_ERROR) {
+      throw std::logic_error("Retrieving text search results failed during creation of a vertex mgp_value");
+    }
+    if (const auto err = mgp_list_append(search_results, vertex); err != mgp_error::MGP_ERROR_NO_ERROR) {
+      throw std::logic_error(
+          "Retrieving text search results failed during insertion of the mgp_value into the result list");
+    }
+  }
+
+  mgp_value *search_results_value;
+  if (const auto err = mgp_value_make_list(search_results, &search_results_value);
+      err != mgp_error::MGP_ERROR_NO_ERROR) {
+    throw std::logic_error("Retrieving text search results failed during creation of a list mgp_value");
+  }
+
+  if (error_msg.has_value()) {
+    if (const auto err = mgp_map_insert(*result, "error_msg", error_value); err != mgp_error::MGP_ERROR_NO_ERROR) {
+      throw std::logic_error("Retrieving text index search error failed during insertion into mgp_map");
+    }
+    return;
+  }
+
+  if (const auto err = mgp_map_insert(*result, "search_results", search_results_value);
+      err != mgp_error::MGP_ERROR_NO_ERROR) {
+    throw std::logic_error("Retrieving text index search results failed during insertion into mgp_map");
+  }
+}
+
+void WrapTextIndexAggregation(mgp_memory *memory, mgp_map **result, const std::string &aggregation_result,
+                              const std::optional<std::string> &error_msg = std::nullopt) {
+  if (const auto err = mgp_map_make_empty(memory, result); err != mgp_error::MGP_ERROR_NO_ERROR) {
+    throw std::logic_error("Retrieving text search results failed during creation of a mgp_map");
+  }
+
+  mgp_value *aggregation_result_or_error_value;
+  if (const auto err = mgp_value_make_string(error_msg.value_or(aggregation_result).data(), memory,
+                                             &aggregation_result_or_error_value);
+      err != mgp_error::MGP_ERROR_NO_ERROR) {
+    throw std::logic_error("Retrieving text search results failed during creation of a string mgp_value");
+  }
+
+  if (error_msg.has_value()) {
+    if (const auto err = mgp_map_insert(*result, "error_msg", aggregation_result_or_error_value);
+        err != mgp_error::MGP_ERROR_NO_ERROR) {
+      throw std::logic_error("Retrieving text index aggregation error failed during insertion into mgp_map");
+    }
+    return;
+  }
+
+  if (const auto err = mgp_map_insert(*result, "aggregation_results", aggregation_result_or_error_value);
+      err != mgp_error::MGP_ERROR_NO_ERROR) {
+    throw std::logic_error("Retrieving text index aggregation results failed during insertion into mgp_map");
+  }
+}
+
+mgp_error mgp_graph_search_text_index(mgp_graph *graph, const char *index_name, const char *search_query,
+                                      text_search_mode search_mode, mgp_memory *memory, mgp_map **result) {
+  return WrapExceptions([graph, memory, index_name, search_query, search_mode, result]() {
+    std::vector<memgraph::storage::Gid> found_vertices_ids;
+    std::optional<std::string> error_msg = std::nullopt;
+    try {
+      found_vertices_ids = graph->getImpl()->TextIndexSearch(index_name, search_query, search_mode);
+    } catch (memgraph::query::QueryException &e) {
+      error_msg = e.what();
+    }
+    WrapTextSearch(graph, memory, result, found_vertices_ids, error_msg);
+  });
+}
+
+mgp_error mgp_graph_aggregate_over_text_index(mgp_graph *graph, const char *index_name, const char *search_query,
+                                              const char *aggregation_query, mgp_memory *memory, mgp_map **result) {
+  return WrapExceptions([graph, memory, index_name, search_query, aggregation_query, result]() {
+    std::string search_results;
+    std::optional<std::string> error_msg = std::nullopt;
+    try {
+      search_results = graph->getImpl()->TextIndexAggregate(index_name, search_query, aggregation_query);
+    } catch (memgraph::query::QueryException &e) {
+      error_msg = e.what();
+    }
+    WrapTextIndexAggregation(memory, result, search_results, error_msg);
+  });
+}
+
 #ifdef MG_ENTERPRISE
 namespace {
 void NextPermitted(mgp_vertices_iterator &it) {

src/query/procedure/mg_procedure_impl.hpp

@@ -1,4 +1,4 @@
-// Copyright 2023 Memgraph Ltd.
+// Copyright 2024 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -562,6 +562,13 @@ struct mgp_graph {
   memgraph::query::ExecutionContext *ctx;
   memgraph::storage::StorageMode storage_mode;
 
+  memgraph::query::DbAccessor *getImpl() const {
+    return std::visit(
+        memgraph::utils::Overloaded{[](memgraph::query::DbAccessor *impl) { return impl; },
+                                    [](memgraph::query::SubgraphDbAccessor *impl) { return impl->GetAccessor(); }},
+        this->impl);
+  }
+
   static mgp_graph WritableGraph(memgraph::query::DbAccessor &acc, memgraph::storage::View view,
                                  memgraph::query::ExecutionContext &ctx) {
     return mgp_graph{&acc, view, &ctx, acc.GetStorageMode()};

src/storage/v2/CMakeLists.txt

@@ -20,6 +20,7 @@ add_library(mg-storage-v2 STATIC
         vertex_info_cache.cpp
         storage.cpp
         indices/indices.cpp
+        indices/text_index.cpp
         all_vertices_iterable.cpp
         edges_iterable.cpp
         vertices_iterable.cpp
@@ -45,4 +46,5 @@ add_library(mg-storage-v2 STATIC
         inmemory/replication/recovery.cpp
 )
 
-target_link_libraries(mg-storage-v2 mg::replication Threads::Threads mg-utils gflags absl::flat_hash_map mg-rpc mg-slk mg-events mg-memory)
+target_include_directories(mg-storage-v2 PUBLIC ${CMAKE_SOURCE_DIR}/include)
+target_link_libraries(mg-storage-v2 mg::replication Threads::Threads mg-utils mg-flags gflags absl::flat_hash_map mg-rpc mg-slk mg-events mg-memory mgcxx_text_search tantivy_text_search)

src/storage/v2/disk/durable_metadata.cpp

@@ -1,4 +1,4 @@
-// Copyright 2023 Memgraph Ltd.
+// Copyright 2024 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -26,6 +26,7 @@ constexpr const char *kVertexCountDescr = "vertex_count";
 constexpr const char *kEdgeDountDescr = "edge_count";
 constexpr const char *kLabelIndexStr = "label_index";
 constexpr const char *kLabelPropertyIndexStr = "label_property_index";
+constexpr const char *kTextIndexStr = "text_index";
 constexpr const char *kExistenceConstraintsStr = "existence_constraints";
 constexpr const char *kUniqueConstraintsStr = "unique_constraints";
 }  // namespace
@@ -144,6 +145,31 @@ bool DurableMetadata::PersistLabelPropertyIndexAndExistenceConstraintDeletion(La
   return true;
 }
 
+bool DurableMetadata::PersistTextIndexCreation(const std::string &index_name, LabelId label) {
+  const std::string index_name_label_pair = index_name + "," + label.ToString();
+  if (auto text_index_store = durability_kvstore_.Get(kTextIndexStr); text_index_store.has_value()) {
+    std::string &value = text_index_store.value();
+    value += "|";
+    value += index_name_label_pair;
+    return durability_kvstore_.Put(kTextIndexStr, value);
+  }
+  return durability_kvstore_.Put(kTextIndexStr, index_name_label_pair);
+}
+
+bool DurableMetadata::PersistTextIndexDeletion(const std::string &index_name, LabelId label) {
+  const std::string index_name_label_pair = index_name + "," + label.ToString();
+  if (auto text_index_store = durability_kvstore_.Get(kTextIndexStr); text_index_store.has_value()) {
+    const std::string &value = text_index_store.value();
+    std::vector<std::string> text_indices = utils::Split(value, "|");
+    std::erase(text_indices, index_name_label_pair);
+    if (text_indices.empty()) {
+      return durability_kvstore_.Delete(kTextIndexStr);
+    }
+    return durability_kvstore_.Put(kTextIndexStr, utils::Join(text_indices, "|"));
+  }
+  return true;
+}
+
 bool DurableMetadata::PersistUniqueConstraintCreation(LabelId label, const std::set<PropertyId> &properties) {
   const std::string entry = utils::GetKeyForUniqueConstraintsDurability(label, properties);
 

src/storage/v2/disk/durable_metadata.hpp

@@ -1,4 +1,4 @@
-// Copyright 2023 Memgraph Ltd.
+// Copyright 2024 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -53,6 +53,10 @@ class DurableMetadata {
   bool PersistLabelPropertyIndexAndExistenceConstraintDeletion(LabelId label, PropertyId property,
                                                                const std::string &key);
 
+  bool PersistTextIndexCreation(const std::string &index_name, LabelId label);
+
+  bool PersistTextIndexDeletion(const std::string &index_name, LabelId label);
+
   bool PersistUniqueConstraintCreation(LabelId label, const std::set<PropertyId> &properties);
 
   bool PersistUniqueConstraintDeletion(LabelId label, const std::set<PropertyId> &properties);

src/storage/v2/disk/storage.cpp

@@ -29,6 +29,8 @@
 #include <rocksdb/utilities/transaction.h>
 #include <rocksdb/utilities/transaction_db.h>
 
+#include "flags/experimental.hpp"
+#include "flags/run_time_configurable.hpp"
 #include "kvstore/kvstore.hpp"
 #include "spdlog/spdlog.h"
 #include "storage/v2/constraints/unique_constraints.hpp"
@@ -856,6 +858,7 @@ StorageInfo DiskStorage::GetInfo(memgraph::replication_coordination_glue::Replic
     const auto &lbl = access->ListAllIndices();
     info.label_indices = lbl.label.size();
     info.label_property_indices = lbl.label_property.size();
+    info.text_indices = lbl.text_indices.size();
     const auto &con = access->ListAllConstraints();
     info.existence_constraints = con.existence.size();
     info.unique_constraints = con.unique.size();
@@ -1670,6 +1673,18 @@ utils::BasicResult<StorageManipulationError, void> DiskStorage::DiskAccessor::Co
         case MetadataDelta::Action::LABEL_PROPERTY_INDEX_STATS_CLEAR: {
           throw utils::NotYetImplemented("ClearIndexStats(stats) is not implemented for DiskStorage.");
         } break;
+        case MetadataDelta::Action::TEXT_INDEX_CREATE: {
+          const auto &info = md_delta.text_index;
+          if (!disk_storage->durable_metadata_.PersistTextIndexCreation(info.index_name, info.label)) {
+            return StorageManipulationError{PersistenceError{}};
+          }
+        } break;
+        case MetadataDelta::Action::TEXT_INDEX_DROP: {
+          const auto &info = md_delta.text_index;
+          if (!disk_storage->durable_metadata_.PersistTextIndexDeletion(info.index_name, info.label)) {
+            return StorageManipulationError{PersistenceError{}};
+          }
+        } break;
         case MetadataDelta::Action::EXISTENCE_CONSTRAINT_CREATE: {
           const auto &info = md_delta.label_property;
           if (!disk_storage->durable_metadata_.PersistLabelPropertyIndexAndExistenceConstraintCreation(
@@ -1768,6 +1783,9 @@ utils::BasicResult<StorageManipulationError, void> DiskStorage::DiskAccessor::Co
     return StorageManipulationError{SerializationError{}};
   }
   spdlog::trace("rocksdb: Commit successful");
+  if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    disk_storage->indices_.text_index_.Commit();
+  }
 
   is_transaction_active_ = false;
 
@@ -1886,6 +1904,9 @@ void DiskStorage::DiskAccessor::Abort() {
   // query_plan_accumulate_aggregate.cpp
   transaction_.disk_transaction_->Rollback();
   transaction_.disk_transaction_->ClearSnapshot();
+  if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    storage_->indices_.text_index_.Rollback();
+  }
   delete transaction_.disk_transaction_;
   transaction_.disk_transaction_ = nullptr;
   is_transaction_active_ = false;
@@ -2092,7 +2113,11 @@ IndicesInfo DiskStorage::DiskAccessor::ListAllIndices() const {
   auto *disk_label_index = static_cast<DiskLabelIndex *>(on_disk->indices_.label_index_.get());
   auto *disk_label_property_index =
       static_cast<DiskLabelPropertyIndex *>(on_disk->indices_.label_property_index_.get());
-  return {disk_label_index->ListIndices(), disk_label_property_index->ListIndices()};
+  auto &text_index = storage_->indices_.text_index_;
+  return {disk_label_index->ListIndices(),
+          disk_label_property_index->ListIndices(),
+          {/* edge type indices */},
+          text_index.ListIndices()};
 }
 ConstraintsInfo DiskStorage::DiskAccessor::ListAllConstraints() const {
   auto *disk_storage = static_cast<DiskStorage *>(storage_);

src/storage/v2/durability/durability.cpp

@@ -151,7 +151,8 @@ void RecoverConstraints(const RecoveredIndicesAndConstraints::ConstraintsMetadat
 
 void RecoverIndicesAndStats(const RecoveredIndicesAndConstraints::IndicesMetadata &indices_metadata, Indices *indices,
                             utils::SkipList<Vertex> *vertices, NameIdMapper *name_id_mapper,
-                            const std::optional<ParallelizedSchemaCreationInfo> &parallel_exec_info) {
+                            const std::optional<ParallelizedSchemaCreationInfo> &parallel_exec_info,
+                            const std::optional<std::filesystem::path> &storage_dir) {
   spdlog::info("Recreating indices from metadata.");
 
   // Recover label indices.
@@ -211,6 +212,26 @@ void RecoverIndicesAndStats(const RecoveredIndicesAndConstraints::IndicesMetadat
   }
   spdlog::info("Edge-type indices are recreated.");
 
+  if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    // Recover text indices.
+    spdlog::info("Recreating {} text indices from metadata.", indices_metadata.text_indices.size());
+    auto &mem_text_index = indices->text_index_;
+    for (const auto &[index_name, label] : indices_metadata.text_indices) {
+      try {
+        if (!storage_dir.has_value()) {
+          throw RecoveryFailure("There must exist a storage directory in order to recover text indices!");
+        }
+
+        mem_text_index.RecoverIndex(storage_dir.value(), index_name, label, vertices->access(), name_id_mapper);
+      } catch (...) {
+        throw RecoveryFailure("The text index must be created here!");
+      }
+      spdlog::info("Text index {} on :{} is recreated from metadata", index_name,
+                   name_id_mapper->IdToName(label.AsUint()));
+    }
+    spdlog::info("Text indices are recreated.");
+  }
+
   spdlog::info("Indices are recreated.");
 }
 
@@ -331,8 +352,13 @@ std::optional<RecoveryInfo> Recovery::RecoverData(std::string *uuid, Replication
     repl_storage_state.epoch_.SetEpoch(std::move(recovered_snapshot->snapshot_info.epoch_id));
 
     if (!utils::DirExists(wal_directory_)) {
+      std::optional<std::filesystem::path> storage_dir = std::nullopt;
+      if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+        storage_dir = config.durability.storage_directory;
+      }
+
       RecoverIndicesAndStats(indices_constraints.indices, indices, vertices, name_id_mapper,
-                             GetParallelExecInfoIndices(recovery_info, config));
+                             GetParallelExecInfoIndices(recovery_info, config), storage_dir);
       RecoverConstraints(indices_constraints.constraints, constraints, vertices, name_id_mapper,
                          GetParallelExecInfo(recovery_info, config));
       return recovered_snapshot->recovery_info;
@@ -467,8 +493,13 @@ std::optional<RecoveryInfo> Recovery::RecoverData(std::string *uuid, Replication
     spdlog::info("All necessary WAL files are loaded successfully.");
   }
 
+  std::optional<std::filesystem::path> storage_dir = std::nullopt;
+  if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    storage_dir = config.durability.storage_directory;
+  }
+
   RecoverIndicesAndStats(indices_constraints.indices, indices, vertices, name_id_mapper,
-                         GetParallelExecInfoIndices(recovery_info, config));
+                         GetParallelExecInfoIndices(recovery_info, config), storage_dir);
   RecoverConstraints(indices_constraints.constraints, constraints, vertices, name_id_mapper,
                      GetParallelExecInfo(recovery_info, config));
 

src/storage/v2/durability/durability.hpp

@@ -1,4 +1,4 @@
-// Copyright 2023 Memgraph Ltd.
+// Copyright 2024 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -102,7 +102,8 @@ std::optional<std::vector<WalDurabilityInfo>> GetWalFiles(const std::filesystem:
 /// @throw RecoveryFailure
 void RecoverIndicesAndStats(const RecoveredIndicesAndConstraints::IndicesMetadata &indices_metadata, Indices *indices,
                             utils::SkipList<Vertex> *vertices, NameIdMapper *name_id_mapper,
-                            const std::optional<ParallelizedSchemaCreationInfo> &parallel_exec_info = std::nullopt);
+                            const std::optional<ParallelizedSchemaCreationInfo> &parallel_exec_info = std::nullopt,
+                            const std::optional<std::filesystem::path> &storage_dir = std::nullopt);
 
 // Helper function used to recover all discovered constraints. The
 // constraints must be recovered after the data recovery is done

src/storage/v2/durability/marker.hpp

@@ -64,6 +64,8 @@ enum class Marker : uint8_t {
   DELTA_LABEL_PROPERTY_INDEX_STATS_CLEAR = 0x64,
   DELTA_EDGE_TYPE_INDEX_CREATE = 0x65,
   DELTA_EDGE_TYPE_INDEX_DROP = 0x66,
+  DELTA_TEXT_INDEX_CREATE = 0x67,
+  DELTA_TEXT_INDEX_DROP = 0x68,
 
   VALUE_FALSE = 0x00,
   VALUE_TRUE = 0xff,
@@ -110,6 +112,8 @@ static const Marker kMarkersAll[] = {
     Marker::DELTA_LABEL_PROPERTY_INDEX_DROP,
     Marker::DELTA_EDGE_TYPE_INDEX_CREATE,
     Marker::DELTA_EDGE_TYPE_INDEX_DROP,
+    Marker::DELTA_TEXT_INDEX_CREATE,
+    Marker::DELTA_TEXT_INDEX_DROP,
     Marker::DELTA_EXISTENCE_CONSTRAINT_CREATE,
     Marker::DELTA_EXISTENCE_CONSTRAINT_DROP,
     Marker::DELTA_UNIQUE_CONSTRAINT_CREATE,

src/storage/v2/durability/metadata.hpp

@@ -44,6 +44,7 @@ struct RecoveredIndicesAndConstraints {
     std::vector<std::pair<LabelId, LabelIndexStats>> label_stats;
     std::vector<std::pair<LabelId, std::pair<PropertyId, LabelPropertyIndexStats>>> label_property_stats;
     std::vector<EdgeTypeId> edge;
+    std::vector<std::pair<std::string, LabelId>> text_indices;
   } indices;
 
   struct ConstraintsMetadata {

src/storage/v2/durability/serialization.cpp

@@ -353,6 +353,8 @@ std::optional<PropertyValue> Decoder::ReadPropertyValue() {
     case Marker::DELTA_LABEL_PROPERTY_INDEX_DROP:
     case Marker::DELTA_EDGE_TYPE_INDEX_CREATE:
     case Marker::DELTA_EDGE_TYPE_INDEX_DROP:
+    case Marker::DELTA_TEXT_INDEX_CREATE:
+    case Marker::DELTA_TEXT_INDEX_DROP:
     case Marker::DELTA_EXISTENCE_CONSTRAINT_CREATE:
     case Marker::DELTA_EXISTENCE_CONSTRAINT_DROP:
     case Marker::DELTA_UNIQUE_CONSTRAINT_CREATE:
@@ -459,6 +461,8 @@ bool Decoder::SkipPropertyValue() {
     case Marker::DELTA_LABEL_PROPERTY_INDEX_DROP:
     case Marker::DELTA_EDGE_TYPE_INDEX_CREATE:
     case Marker::DELTA_EDGE_TYPE_INDEX_DROP:
+    case Marker::DELTA_TEXT_INDEX_CREATE:
+    case Marker::DELTA_TEXT_INDEX_DROP:
     case Marker::DELTA_EXISTENCE_CONSTRAINT_CREATE:
     case Marker::DELTA_EXISTENCE_CONSTRAINT_DROP:
     case Marker::DELTA_UNIQUE_CONSTRAINT_CREATE:

src/storage/v2/durability/snapshot.cpp

@@ -13,6 +13,8 @@
 
 #include <thread>
 
+#include "flags/experimental.hpp"
+#include "flags/run_time_configurable.hpp"
 #include "spdlog/spdlog.h"
 #include "storage/v2/durability/exceptions.hpp"
 #include "storage/v2/durability/paths.hpp"
@@ -2004,6 +2006,24 @@ RecoveredSnapshot LoadSnapshot(const std::filesystem::path &path, utils::SkipLis
       spdlog::info("Metadata of edge-type indices are recovered.");
     }
 
+    // Recover text indices.
+    if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+      auto size = snapshot.ReadUint();
+      if (!size) throw RecoveryFailure("Couldn't recover the number of text indices!");
+      spdlog::info("Recovering metadata of {} text indices.", *size);
+      for (uint64_t i = 0; i < *size; ++i) {
+        auto index_name = snapshot.ReadString();
+        if (!index_name.has_value()) throw RecoveryFailure("Couldn't read text index name!");
+        auto label = snapshot.ReadUint();
+        if (!label) throw RecoveryFailure("Couldn't read text index label!");
+        AddRecoveredIndexConstraint(&indices_constraints.indices.text_indices,
+                                    {index_name.value(), get_label_from_id(*label)}, "The text index already exists!");
+        SPDLOG_TRACE("Recovered metadata of text index {} for :{}", index_name.value(),
+                     name_id_mapper->IdToName(snapshot_id_map.at(*label)));
+      }
+      spdlog::info("Metadata of text indices are recovered.");
+    }
+
     spdlog::info("Metadata of indices are recovered.");
   }
 
@@ -2493,6 +2513,16 @@ void CreateSnapshot(Storage *storage, Transaction *transaction, const std::files
         write_mapping(item);
       }
     }
+
+    // Write text indices.
+    if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+      auto text_indices = storage->indices_.text_index_.ListIndices();
+      snapshot.WriteUint(text_indices.size());
+      for (const auto &[index_name, label] : text_indices) {
+        snapshot.WriteString(index_name);
+        write_mapping(label);
+      }
+    }
   }
 
   // Write constraints.

src/storage/v2/durability/storage_global_operation.hpp

@@ -25,6 +25,8 @@ enum class StorageMetadataOperation {
   LABEL_PROPERTY_INDEX_STATS_CLEAR,
   EDGE_TYPE_INDEX_CREATE,
   EDGE_TYPE_INDEX_DROP,
+  TEXT_INDEX_CREATE,
+  TEXT_INDEX_DROP,
   EXISTENCE_CONSTRAINT_CREATE,
   EXISTENCE_CONSTRAINT_DROP,
   UNIQUE_CONSTRAINT_CREATE,

src/storage/v2/durability/wal.cpp

@@ -99,6 +99,10 @@ Marker OperationToMarker(StorageMetadataOperation operation) {
       return Marker::DELTA_EDGE_TYPE_INDEX_CREATE;
     case StorageMetadataOperation::EDGE_TYPE_INDEX_DROP:
       return Marker::DELTA_EDGE_TYPE_INDEX_DROP;
+    case StorageMetadataOperation::TEXT_INDEX_CREATE:
+      return Marker::DELTA_TEXT_INDEX_CREATE;
+    case StorageMetadataOperation::TEXT_INDEX_DROP:
+      return Marker::DELTA_TEXT_INDEX_DROP;
     case StorageMetadataOperation::EXISTENCE_CONSTRAINT_CREATE:
       return Marker::DELTA_EXISTENCE_CONSTRAINT_CREATE;
     case StorageMetadataOperation::EXISTENCE_CONSTRAINT_DROP:
@@ -172,6 +176,10 @@ WalDeltaData::Type MarkerToWalDeltaDataType(Marker marker) {
       return WalDeltaData::Type::LABEL_PROPERTY_INDEX_CREATE;
     case Marker::DELTA_LABEL_PROPERTY_INDEX_DROP:
       return WalDeltaData::Type::LABEL_PROPERTY_INDEX_DROP;
+    case Marker::DELTA_TEXT_INDEX_CREATE:
+      return WalDeltaData::Type::TEXT_INDEX_CREATE;
+    case Marker::DELTA_TEXT_INDEX_DROP:
+      return WalDeltaData::Type::TEXT_INDEX_DROP;
     case Marker::DELTA_LABEL_PROPERTY_INDEX_STATS_SET:
       return WalDeltaData::Type::LABEL_PROPERTY_INDEX_STATS_SET;
     case Marker::DELTA_LABEL_PROPERTY_INDEX_STATS_CLEAR:
@@ -382,6 +390,21 @@ WalDeltaData ReadSkipWalDeltaData(BaseDecoder *decoder) {
           if (!decoder->SkipString()) throw RecoveryFailure("Invalid WAL data!");
         }
       }
+      break;
+    }
+    case WalDeltaData::Type::TEXT_INDEX_CREATE:
+    case WalDeltaData::Type::TEXT_INDEX_DROP: {
+      if constexpr (read_data) {
+        auto index_name = decoder->ReadString();
+        if (!index_name) throw RecoveryFailure("Invalid WAL data!");
+        delta.operation_text.index_name = std::move(*index_name);
+        auto label = decoder->ReadString();
+        if (!label) throw RecoveryFailure("Invalid WAL data!");
+        delta.operation_text.label = std::move(*label);
+      } else {
+        if (!decoder->SkipString() || !decoder->SkipString()) throw RecoveryFailure("Invalid WAL data!");
+      }
+      break;
     }
   }
 
@@ -529,6 +552,12 @@ bool operator==(const WalDeltaData &a, const WalDeltaData &b) {
 
     case WalDeltaData::Type::LABEL_PROPERTY_INDEX_CREATE:
     case WalDeltaData::Type::LABEL_PROPERTY_INDEX_DROP:
+    case WalDeltaData::Type::TEXT_INDEX_CREATE:
+      return a.operation_text.index_name == b.operation_text.index_name &&
+             a.operation_text.label == b.operation_text.label;
+    case WalDeltaData::Type::TEXT_INDEX_DROP:
+      return a.operation_text.index_name == b.operation_text.index_name &&
+             a.operation_text.label == b.operation_text.label;
     case WalDeltaData::Type::EXISTENCE_CONSTRAINT_CREATE:
     case WalDeltaData::Type::EXISTENCE_CONSTRAINT_DROP:
       return a.operation_label_property.label == b.operation_label_property.label &&
@@ -675,7 +704,8 @@ void EncodeTransactionEnd(BaseEncoder *encoder, uint64_t timestamp) {
 }
 
 void EncodeOperation(BaseEncoder *encoder, NameIdMapper *name_id_mapper, StorageMetadataOperation operation,
-                     LabelId label, const std::set<PropertyId> &properties, const LabelIndexStats &stats,
+                     const std::optional<std::string> text_index_name, LabelId label,
+                     const std::set<PropertyId> &properties, const LabelIndexStats &stats,
                      const LabelPropertyIndexStats &property_stats, uint64_t timestamp) {
   encoder->WriteMarker(Marker::SECTION_DELTA);
   encoder->WriteUint(timestamp);
@@ -731,6 +761,14 @@ void EncodeOperation(BaseEncoder *encoder, NameIdMapper *name_id_mapper, Storage
     case StorageMetadataOperation::EDGE_TYPE_INDEX_DROP: {
       MG_ASSERT(false, "Invalid function  call!");
     }
+    case StorageMetadataOperation::TEXT_INDEX_CREATE:
+    case StorageMetadataOperation::TEXT_INDEX_DROP: {
+      MG_ASSERT(text_index_name.has_value(), "Text indices must be named!");
+      encoder->WriteMarker(OperationToMarker(operation));
+      encoder->WriteString(text_index_name.value());
+      encoder->WriteString(name_id_mapper->IdToName(label.AsUint()));
+      break;
+    }
   }
 }
 
@@ -752,6 +790,8 @@ void EncodeOperation(BaseEncoder *encoder, NameIdMapper *name_id_mapper, Storage
     case StorageMetadataOperation::LABEL_INDEX_STATS_SET:
     case StorageMetadataOperation::LABEL_PROPERTY_INDEX_CREATE:
     case StorageMetadataOperation::LABEL_PROPERTY_INDEX_DROP:
+    case StorageMetadataOperation::TEXT_INDEX_CREATE:
+    case StorageMetadataOperation::TEXT_INDEX_DROP:
     case StorageMetadataOperation::EXISTENCE_CONSTRAINT_CREATE:
     case StorageMetadataOperation::EXISTENCE_CONSTRAINT_DROP:
     case StorageMetadataOperation::LABEL_PROPERTY_INDEX_STATS_SET:
@@ -1000,6 +1040,20 @@ RecoveryInfo LoadWal(const std::filesystem::path &path, RecoveredIndicesAndConst
                                     "The label index stats doesn't exist!");
           break;
         }
+        case WalDeltaData::Type::TEXT_INDEX_CREATE: {
+          auto index_name = delta.operation_text.index_name;
+          auto label = LabelId::FromUint(name_id_mapper->NameToId(delta.operation_text.label));
+          AddRecoveredIndexConstraint(&indices_constraints->indices.text_indices, {index_name, label},
+                                      "The text index already exists!");
+          break;
+        }
+        case WalDeltaData::Type::TEXT_INDEX_DROP: {
+          auto index_name = delta.operation_text.index_name;
+          auto label = LabelId::FromUint(name_id_mapper->NameToId(delta.operation_text.label));
+          RemoveRecoveredIndexConstraint(&indices_constraints->indices.text_indices, {index_name, label},
+                                         "The text index doesn't exist!");
+          break;
+        }
         case WalDeltaData::Type::EXISTENCE_CONSTRAINT_CREATE: {
           auto label_id = LabelId::FromUint(name_id_mapper->NameToId(delta.operation_label_property.label));
           auto property_id = PropertyId::FromUint(name_id_mapper->NameToId(delta.operation_label_property.property));
@@ -1148,10 +1202,11 @@ void WalFile::AppendTransactionEnd(uint64_t timestamp) {
   UpdateStats(timestamp);
 }
 
-void WalFile::AppendOperation(StorageMetadataOperation operation, LabelId label, const std::set<PropertyId> &properties,
+void WalFile::AppendOperation(StorageMetadataOperation operation, const std::optional<std::string> text_index_name,
-                              const LabelIndexStats &stats, const LabelPropertyIndexStats &property_stats,
+                              LabelId label, const std::set<PropertyId> &properties, const LabelIndexStats &stats,
-                              uint64_t timestamp) {
+                              const LabelPropertyIndexStats &property_stats, uint64_t timestamp) {
-  EncodeOperation(&wal_, name_id_mapper_, operation, label, properties, stats, property_stats, timestamp);
+  EncodeOperation(&wal_, name_id_mapper_, operation, text_index_name, label, properties, stats, property_stats,
+                  timestamp);
   UpdateStats(timestamp);
 }
 

src/storage/v2/durability/wal.hpp

@@ -69,6 +69,8 @@ struct WalDeltaData {
     LABEL_PROPERTY_INDEX_STATS_CLEAR,
     EDGE_INDEX_CREATE,
     EDGE_INDEX_DROP,
+    TEXT_INDEX_CREATE,
+    TEXT_INDEX_DROP,
     EXISTENCE_CONSTRAINT_CREATE,
     EXISTENCE_CONSTRAINT_DROP,
     UNIQUE_CONSTRAINT_CREATE,
@@ -127,6 +129,11 @@ struct WalDeltaData {
     std::string property;
     std::string stats;
   } operation_label_property_stats;
+
+  struct {
+    std::string index_name;
+    std::string label;
+  } operation_text;
 };
 
 bool operator==(const WalDeltaData &a, const WalDeltaData &b);
@@ -163,6 +170,8 @@ constexpr bool IsWalDeltaDataTypeTransactionEndVersion15(const WalDeltaData::Typ
     case WalDeltaData::Type::LABEL_PROPERTY_INDEX_STATS_CLEAR:
     case WalDeltaData::Type::EDGE_INDEX_CREATE:
     case WalDeltaData::Type::EDGE_INDEX_DROP:
+    case WalDeltaData::Type::TEXT_INDEX_CREATE:
+    case WalDeltaData::Type::TEXT_INDEX_DROP:
     case WalDeltaData::Type::EXISTENCE_CONSTRAINT_CREATE:
     case WalDeltaData::Type::EXISTENCE_CONSTRAINT_DROP:
     case WalDeltaData::Type::UNIQUE_CONSTRAINT_CREATE:
@@ -213,7 +222,8 @@ void EncodeTransactionEnd(BaseEncoder *encoder, uint64_t timestamp);
 
 /// Function used to encode non-transactional operation.
 void EncodeOperation(BaseEncoder *encoder, NameIdMapper *name_id_mapper, StorageMetadataOperation operation,
-                     LabelId label, const std::set<PropertyId> &properties, const LabelIndexStats &stats,
+                     const std::optional<std::string> text_index_name, LabelId label,
+                     const std::set<PropertyId> &properties, const LabelIndexStats &stats,
                      const LabelPropertyIndexStats &property_stats, uint64_t timestamp);
 
 void EncodeOperation(BaseEncoder *encoder, NameIdMapper *name_id_mapper, StorageMetadataOperation operation,
@@ -248,8 +258,9 @@ class WalFile {
 
   void AppendTransactionEnd(uint64_t timestamp);
 
-  void AppendOperation(StorageMetadataOperation operation, LabelId label, const std::set<PropertyId> &properties,
+  void AppendOperation(StorageMetadataOperation operation, const std::optional<std::string> text_index_name,
-                       const LabelIndexStats &stats, const LabelPropertyIndexStats &property_stats, uint64_t timestamp);
+                       LabelId label, const std::set<PropertyId> &properties, const LabelIndexStats &stats,
+                       const LabelPropertyIndexStats &property_stats, uint64_t timestamp);
 
   void AppendOperation(StorageMetadataOperation operation, EdgeTypeId edge_type, uint64_t timestamp);
 

src/storage/v2/indices/indices.cpp

@@ -16,6 +16,7 @@
 #include "storage/v2/inmemory/edge_type_index.hpp"
 #include "storage/v2/inmemory/label_index.hpp"
 #include "storage/v2/inmemory/label_property_index.hpp"
+#include "storage/v2/storage.hpp"
 
 namespace memgraph::storage {
 

src/storage/v2/indices/indices.hpp

@@ -18,6 +18,7 @@
 #include "storage/v2/indices/edge_type_index.hpp"
 #include "storage/v2/indices/label_index.hpp"
 #include "storage/v2/indices/label_property_index.hpp"
+#include "storage/v2/indices/text_index.hpp"
 #include "storage/v2/storage_mode.hpp"
 
 namespace memgraph::storage {
@@ -31,12 +32,12 @@ struct Indices {
   Indices &operator=(Indices &&) = delete;
   ~Indices() = default;
 
-  /// This function should be called from garbage collection to clean-up the
+  /// This function should be called from garbage collection to clean up the
   /// index.
   /// TODO: unused in disk indices
   void RemoveObsoleteEntries(uint64_t oldest_active_start_timestamp, std::stop_token token) const;
 
-  /// Surgical removal of entries that was inserted this transaction
+  /// Surgical removal of entries that were inserted in this transaction
   /// TODO: unused in disk indices
   void AbortEntries(LabelId labelId, std::span<Vertex *const> vertices, uint64_t exact_start_timestamp) const;
   void AbortEntries(PropertyId property, std::span<std::pair<PropertyValue, Vertex *> const> vertices,
@@ -71,6 +72,7 @@ struct Indices {
   std::unique_ptr<LabelIndex> label_index_;
   std::unique_ptr<LabelPropertyIndex> label_property_index_;
   std::unique_ptr<EdgeTypeIndex> edge_type_index_;
+  mutable TextIndex text_index_;
 };
 
 }  // namespace memgraph::storage

src/storage/v2/indices/text_index.cpp

@@ -0,0 +1,430 @@
+// Copyright 2024 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+#include "storage/v2/indices/text_index.hpp"
+#include "flags/experimental.hpp"
+#include "flags/run_time_configurable.hpp"
+#include "query/db_accessor.hpp"
+#include "storage/v2/view.hpp"
+#include "text_search.hpp"
+
+namespace memgraph::storage {
+
+std::string GetPropertyName(PropertyId prop_id, memgraph::query::DbAccessor *db) { return db->PropertyToName(prop_id); }
+
+std::string GetPropertyName(PropertyId prop_id, NameIdMapper *name_id_mapper) {
+  return name_id_mapper->IdToName(prop_id.AsUint());
+}
+
+inline std::string TextIndex::MakeIndexPath(const std::filesystem::path &storage_dir, const std::string &index_name) {
+  return (storage_dir / kTextIndicesDirectory / index_name).string();
+}
+
+void TextIndex::CreateEmptyIndex(const std::filesystem::path &storage_dir, const std::string &index_name,
+                                 LabelId label) {
+  if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    throw query::TextSearchDisabledException();
+  }
+
+  if (index_.contains(index_name)) {
+    throw query::TextSearchException("Text index \"{}\" already exists.", index_name);
+  }
+
+  try {
+    nlohmann::json mappings = {};
+    mappings["properties"] = {};
+    mappings["properties"]["metadata"] = {{"type", "json"}, {"fast", true}, {"stored", true}, {"text", true}};
+    mappings["properties"]["data"] = {{"type", "json"}, {"fast", true}, {"stored", true}, {"text", true}};
+    mappings["properties"]["all"] = {{"type", "text"}, {"fast", true}, {"stored", true}, {"text", true}};
+
+    index_.emplace(index_name, TextIndexData{.context_ = mgcxx::text_search::create_index(
+                                                 MakeIndexPath(storage_dir, index_name),
+                                                 mgcxx::text_search::IndexConfig{.mappings = mappings.dump()}),
+                                             .scope_ = label});
+  } catch (const std::exception &e) {
+    throw query::TextSearchException("Tantivy error: {}", e.what());
+  }
+  label_to_index_.emplace(label, index_name);
+}
+
+template <typename T>
+nlohmann::json TextIndex::SerializeProperties(const std::map<PropertyId, PropertyValue> &properties, T *name_resolver) {
+  nlohmann::json serialized_properties = nlohmann::json::value_t::object;
+  for (const auto &[prop_id, prop_value] : properties) {
+    switch (prop_value.type()) {
+      case PropertyValue::Type::Bool:
+        serialized_properties[GetPropertyName(prop_id, name_resolver)] = prop_value.ValueBool();
+        break;
+      case PropertyValue::Type::Int:
+        serialized_properties[GetPropertyName(prop_id, name_resolver)] = prop_value.ValueInt();
+        break;
+      case PropertyValue::Type::Double:
+        serialized_properties[GetPropertyName(prop_id, name_resolver)] = prop_value.ValueDouble();
+        break;
+      case PropertyValue::Type::String:
+        serialized_properties[GetPropertyName(prop_id, name_resolver)] = prop_value.ValueString();
+        break;
+      case PropertyValue::Type::Null:
+      case PropertyValue::Type::List:
+      case PropertyValue::Type::Map:
+      case PropertyValue::Type::TemporalData:
+      default:
+        continue;
+    }
+  }
+
+  return serialized_properties;
+}
+
+std::string TextIndex::StringifyProperties(const std::map<PropertyId, PropertyValue> &properties) {
+  std::vector<std::string> indexable_properties_as_string;
+  for (const auto &[_, prop_value] : properties) {
+    switch (prop_value.type()) {
+      case PropertyValue::Type::Bool:
+        indexable_properties_as_string.push_back(prop_value.ValueBool() ? "true" : "false");
+        break;
+      case PropertyValue::Type::Int:
+        indexable_properties_as_string.push_back(std::to_string(prop_value.ValueInt()));
+        break;
+      case PropertyValue::Type::Double:
+        indexable_properties_as_string.push_back(std::to_string(prop_value.ValueDouble()));
+        break;
+      case PropertyValue::Type::String:
+        indexable_properties_as_string.push_back(prop_value.ValueString());
+        break;
+      // NOTE: As the following types aren‘t indexed in Tantivy, they don’t appear in the property value string either.
+      case PropertyValue::Type::Null:
+      case PropertyValue::Type::List:
+      case PropertyValue::Type::Map:
+      case PropertyValue::Type::TemporalData:
+      default:
+        continue;
+    }
+  }
+  return utils::Join(indexable_properties_as_string, " ");
+}
+
+std::vector<mgcxx::text_search::Context *> TextIndex::GetApplicableTextIndices(const std::vector<LabelId> &labels) {
+  if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    throw query::TextSearchDisabledException();
+  }
+
+  std::vector<mgcxx::text_search::Context *> applicable_text_indices;
+  for (const auto &label : labels) {
+    if (label_to_index_.contains(label)) {
+      applicable_text_indices.push_back(&index_.at(label_to_index_.at(label)).context_);
+    }
+  }
+  return applicable_text_indices;
+}
+
+void TextIndex::LoadNodeToTextIndices(const std::int64_t gid, const nlohmann::json &properties,
+                                      const std::string &property_values_as_str,
+                                      const std::vector<mgcxx::text_search::Context *> &applicable_text_indices) {
+  if (applicable_text_indices.empty()) {
+    return;
+  }
+
+  // NOTE: Text indexes are presently all-property indices. If we allow text indexes restricted to specific properties,
+  // an indexable document should be created for each applicable index.
+  nlohmann::json document = {};
+  document["data"] = properties;
+  document["all"] = property_values_as_str;
+  document["metadata"] = {};
+  document["metadata"]["gid"] = gid;
+  document["metadata"]["deleted"] = false;
+  document["metadata"]["is_node"] = true;
+
+  for (auto *index_context : applicable_text_indices) {
+    try {
+      mgcxx::text_search::add_document(
+          *index_context,
+          mgcxx::text_search::DocumentInput{
+              .data = document.dump(-1, ' ', false, nlohmann::json::error_handler_t::replace)},
+          kDoSkipCommit);
+    } catch (const std::exception &e) {
+      throw query::TextSearchException("Tantivy error: {}", e.what());
+    }
+  }
+}
+
+void TextIndex::CommitLoadedNodes(mgcxx::text_search::Context &index_context) {
+  // As CREATE TEXT INDEX (...) queries don’t accumulate deltas, db_transactional_accessor_->Commit() does not reach
+  // the code area where changes to indices are committed. To get around that without needing to commit text indices
+  // after every such query, we commit here.
+  try {
+    mgcxx::text_search::commit(index_context);
+  } catch (const std::exception &e) {
+    throw query::TextSearchException("Tantivy error: {}", e.what());
+  }
+}
+
+void TextIndex::AddNode(
+    Vertex *vertex_after_update, NameIdMapper *name_id_mapper,
+    const std::optional<std::vector<mgcxx::text_search::Context *>> &maybe_applicable_text_indices) {
+  if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    throw query::TextSearchDisabledException();
+  }
+
+  auto applicable_text_indices =
+      maybe_applicable_text_indices.value_or(GetApplicableTextIndices(vertex_after_update->labels));
+  if (applicable_text_indices.empty()) {
+    return;
+  }
+
+  auto vertex_properties = vertex_after_update->properties.Properties();
+  LoadNodeToTextIndices(vertex_after_update->gid.AsInt(), SerializeProperties(vertex_properties, name_id_mapper),
+                        StringifyProperties(vertex_properties), applicable_text_indices);
+}
+
+void TextIndex::UpdateNode(Vertex *vertex_after_update, NameIdMapper *name_id_mapper,
+                           const std::vector<LabelId> &removed_labels) {
+  if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    throw query::TextSearchDisabledException();
+  }
+
+  if (!removed_labels.empty()) {
+    auto indexes_to_remove_node_from = GetApplicableTextIndices(removed_labels);
+    RemoveNode(vertex_after_update, indexes_to_remove_node_from);
+  }
+
+  auto applicable_text_indices = GetApplicableTextIndices(vertex_after_update->labels);
+  if (applicable_text_indices.empty()) return;
+  RemoveNode(vertex_after_update, applicable_text_indices);
+  AddNode(vertex_after_update, name_id_mapper, applicable_text_indices);
+}
+
+void TextIndex::RemoveNode(
+    Vertex *vertex_after_update,
+    const std::optional<std::vector<mgcxx::text_search::Context *>> &maybe_applicable_text_indices) {
+  if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    throw query::TextSearchDisabledException();
+  }
+
+  auto search_node_to_be_deleted =
+      mgcxx::text_search::SearchInput{.search_query = fmt::format("metadata.gid:{}", vertex_after_update->gid.AsInt())};
+
+  for (auto *index_context :
+       maybe_applicable_text_indices.value_or(GetApplicableTextIndices(vertex_after_update->labels))) {
+    try {
+      mgcxx::text_search::delete_document(*index_context, search_node_to_be_deleted, kDoSkipCommit);
+    } catch (const std::exception &e) {
+      throw query::TextSearchException("Tantivy error: {}", e.what());
+    }
+  }
+}
+
+void TextIndex::CreateIndex(const std::filesystem::path &storage_dir, const std::string &index_name, LabelId label,
+                            memgraph::query::DbAccessor *db) {
+  if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    throw query::TextSearchDisabledException();
+  }
+
+  CreateEmptyIndex(storage_dir, index_name, label);
+
+  for (const auto &v : db->Vertices(View::NEW)) {
+    if (!v.HasLabel(View::NEW, label).GetValue()) {
+      continue;
+    }
+
+    auto vertex_properties = v.Properties(View::NEW).GetValue();
+    LoadNodeToTextIndices(v.Gid().AsInt(), SerializeProperties(vertex_properties, db),
+                          StringifyProperties(vertex_properties), {&index_.at(index_name).context_});
+  }
+
+  CommitLoadedNodes(index_.at(index_name).context_);
+}
+
+void TextIndex::RecoverIndex(const std::filesystem::path &storage_dir, const std::string &index_name, LabelId label,
+                             memgraph::utils::SkipList<Vertex>::Accessor vertices, NameIdMapper *name_id_mapper) {
+  if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    throw query::TextSearchDisabledException();
+  }
+
+  // Clear Tantivy-internal files if they exist from previous sessions
+  std::filesystem::remove_all(storage_dir / kTextIndicesDirectory / index_name);
+
+  CreateEmptyIndex(storage_dir, index_name, label);
+
+  for (const auto &v : vertices) {
+    if (std::find(v.labels.begin(), v.labels.end(), label) == v.labels.end()) {
+      continue;
+    }
+
+    auto vertex_properties = v.properties.Properties();
+    LoadNodeToTextIndices(v.gid.AsInt(), SerializeProperties(vertex_properties, name_id_mapper),
+                          StringifyProperties(vertex_properties), {&index_.at(index_name).context_});
+  }
+
+  CommitLoadedNodes(index_.at(index_name).context_);
+}
+
+LabelId TextIndex::DropIndex(const std::filesystem::path &storage_dir, const std::string &index_name) {
+  if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    throw query::TextSearchDisabledException();
+  }
+
+  if (!index_.contains(index_name)) {
+    throw query::TextSearchException("Text index \"{}\" doesn’t exist.", index_name);
+  }
+
+  try {
+    mgcxx::text_search::drop_index(MakeIndexPath(storage_dir, index_name));
+  } catch (const std::exception &e) {
+    throw query::TextSearchException("Tantivy error: {}", e.what());
+  }
+  auto deleted_index_label = index_.at(index_name).scope_;
+
+  index_.erase(index_name);
+  std::erase_if(label_to_index_, [index_name](const auto &item) { return item.second == index_name; });
+
+  return deleted_index_label;
+}
+
+bool TextIndex::IndexExists(const std::string &index_name) const { return index_.contains(index_name); }
+
+mgcxx::text_search::SearchOutput TextIndex::SearchGivenProperties(const std::string &index_name,
+                                                                  const std::string &search_query) {
+  try {
+    return mgcxx::text_search::search(
+        index_.at(index_name).context_,
+        mgcxx::text_search::SearchInput{.search_query = search_query, .return_fields = {"metadata"}});
+  } catch (const std::exception &e) {
+    throw query::TextSearchException("Tantivy error: {}", e.what());
+  }
+
+  return mgcxx::text_search::SearchOutput{};
+}
+
+mgcxx::text_search::SearchOutput TextIndex::RegexSearch(const std::string &index_name,
+                                                        const std::string &search_query) {
+  try {
+    return mgcxx::text_search::regex_search(
+        index_.at(index_name).context_,
+        mgcxx::text_search::SearchInput{
+            .search_fields = {"all"}, .search_query = search_query, .return_fields = {"metadata"}});
+  } catch (const std::exception &e) {
+    throw query::TextSearchException("Tantivy error: {}", e.what());
+  }
+
+  return mgcxx::text_search::SearchOutput{};
+}
+
+mgcxx::text_search::SearchOutput TextIndex::SearchAllProperties(const std::string &index_name,
+                                                                const std::string &search_query) {
+  try {
+    return mgcxx::text_search::search(
+        index_.at(index_name).context_,
+        mgcxx::text_search::SearchInput{
+            .search_fields = {"all"}, .search_query = search_query, .return_fields = {"metadata"}});
+  } catch (const std::exception &e) {
+    throw query::TextSearchException("Tantivy error: {}", e.what());
+  }
+
+  return mgcxx::text_search::SearchOutput{};
+}
+
+std::vector<Gid> TextIndex::Search(const std::string &index_name, const std::string &search_query,
+                                   text_search_mode search_mode) {
+  if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    throw query::TextSearchDisabledException();
+  }
+
+  if (!index_.contains(index_name)) {
+    throw query::TextSearchException("Text index \"{}\" doesn’t exist.", index_name);
+  }
+
+  mgcxx::text_search::SearchOutput search_results;
+  switch (search_mode) {
+    case text_search_mode::SPECIFIED_PROPERTIES:
+      search_results = SearchGivenProperties(index_name, search_query);
+      break;
+    case text_search_mode::REGEX:
+      search_results = RegexSearch(index_name, search_query);
+      break;
+    case text_search_mode::ALL_PROPERTIES:
+      search_results = SearchAllProperties(index_name, search_query);
+      break;
+    default:
+      throw query::TextSearchException(
+          "Unsupported search mode: please use one of text_search.search, text_search.search_all, or "
+          "text_search.regex_search.");
+  }
+
+  std::vector<Gid> found_nodes;
+  for (const auto &doc : search_results.docs) {
+    // The CXX .data() method (https://cxx.rs/binding/string.html) may overestimate string length, causing JSON parsing
+    // errors downstream. We prevent this by resizing the converted string with the correctly-working .length() method.
+    std::string doc_string = doc.data.data();
+    doc_string.resize(doc.data.length());
+    auto doc_json = nlohmann::json::parse(doc_string);
+    found_nodes.push_back(storage::Gid::FromString(doc_json["metadata"]["gid"].dump()));
+  }
+  return found_nodes;
+}
+
+std::string TextIndex::Aggregate(const std::string &index_name, const std::string &search_query,
+                                 const std::string &aggregation_query) {
+  if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    throw query::TextSearchDisabledException();
+  }
+
+  if (!index_.contains(index_name)) {
+    throw query::TextSearchException("Text index \"{}\" doesn’t exist.", index_name);
+  }
+
+  mgcxx::text_search::DocumentOutput aggregation_result;
+  try {
+    aggregation_result = mgcxx::text_search::aggregate(
+        index_.at(index_name).context_,
+        mgcxx::text_search::SearchInput{
+            .search_fields = {"all"}, .search_query = search_query, .aggregation_query = aggregation_query});
+
+  } catch (const std::exception &e) {
+    throw query::TextSearchException("Tantivy error: {}", e.what());
+  }
+  // The CXX .data() method (https://cxx.rs/binding/string.html) may overestimate string length, causing JSON parsing
+  // errors downstream. We prevent this by resizing the converted string with the correctly-working .length() method.
+  std::string result_string = aggregation_result.data.data();
+  result_string.resize(aggregation_result.data.length());
+  return result_string;
+}
+
+void TextIndex::Commit() {
+  if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    throw query::TextSearchDisabledException();
+  }
+
+  for (auto &[_, index_data] : index_) {
+    mgcxx::text_search::commit(index_data.context_);
+  }
+}
+
+void TextIndex::Rollback() {
+  if (!flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    throw query::TextSearchDisabledException();
+  }
+
+  for (auto &[_, index_data] : index_) {
+    mgcxx::text_search::rollback(index_data.context_);
+  }
+}
+
+std::vector<std::pair<std::string, LabelId>> TextIndex::ListIndices() const {
+  std::vector<std::pair<std::string, LabelId>> ret;
+  ret.reserve(index_.size());
+  for (const auto &[index_name, index_data] : index_) {
+    ret.emplace_back(index_name, index_data.scope_);
+  }
+  return ret;
+}
+
+}  // namespace memgraph::storage

src/storage/v2/indices/text_index.hpp

@@ -0,0 +1,105 @@
+// Copyright 2024 Memgraph Ltd.
+//
+// Use of this software is governed by the Business Source License
+// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+// License, and you may not use this file except in compliance with the Business Source License.
+//
+// As of the Change Date specified in that file, in accordance with
+// the Business Source License, use of this software will be governed
+// by the Apache License, Version 2.0, included in the file
+// licenses/APL.txt.
+
+#pragma once
+
+#include <json/json.hpp>
+#include "mg_procedure.h"
+#include "storage/v2/id_types.hpp"
+#include "storage/v2/name_id_mapper.hpp"
+#include "storage/v2/vertex.hpp"
+#include "text_search.hpp"
+
+namespace memgraph::query {
+class DbAccessor;
+}
+
+namespace memgraph::storage {
+struct TextIndexData {
+  mgcxx::text_search::Context context_;
+  LabelId scope_;
+};
+
+class TextIndex {
+ private:
+  static constexpr bool kDoSkipCommit = true;
+  static constexpr std::string_view kTextIndicesDirectory = "text_indices";
+
+  inline std::string MakeIndexPath(const std::filesystem::path &storage_dir, const std::string &index_name);
+
+  void CreateEmptyIndex(const std::filesystem::path &storage_dir, const std::string &index_name, LabelId label);
+
+  template <typename T>
+  nlohmann::json SerializeProperties(const std::map<PropertyId, PropertyValue> &properties, T *name_resolver);
+
+  std::string StringifyProperties(const std::map<PropertyId, PropertyValue> &properties);
+
+  std::vector<mgcxx::text_search::Context *> GetApplicableTextIndices(const std::vector<LabelId> &labels);
+
+  void LoadNodeToTextIndices(const std::int64_t gid, const nlohmann::json &properties,
+                             const std::string &property_values_as_str,
+                             const std::vector<mgcxx::text_search::Context *> &applicable_text_indices);
+
+  void CommitLoadedNodes(mgcxx::text_search::Context &index_context);
+
+  mgcxx::text_search::SearchOutput SearchGivenProperties(const std::string &index_name,
+                                                         const std::string &search_query);
+
+  mgcxx::text_search::SearchOutput RegexSearch(const std::string &index_name, const std::string &search_query);
+
+  mgcxx::text_search::SearchOutput SearchAllProperties(const std::string &index_name, const std::string &search_query);
+
+ public:
+  TextIndex() = default;
+
+  TextIndex(const TextIndex &) = delete;
+  TextIndex(TextIndex &&) = delete;
+  TextIndex &operator=(const TextIndex &) = delete;
+  TextIndex &operator=(TextIndex &&) = delete;
+
+  ~TextIndex() = default;
+
+  std::map<std::string, TextIndexData> index_;
+  std::map<LabelId, std::string> label_to_index_;
+
+  void AddNode(
+      Vertex *vertex, NameIdMapper *name_id_mapper,
+      const std::optional<std::vector<mgcxx::text_search::Context *>> &maybe_applicable_text_indices = std::nullopt);
+
+  void UpdateNode(Vertex *vertex, NameIdMapper *name_id_mapper, const std::vector<LabelId> &removed_labels = {});
+
+  void RemoveNode(
+      Vertex *vertex,
+      const std::optional<std::vector<mgcxx::text_search::Context *>> &maybe_applicable_text_indices = std::nullopt);
+
+  void CreateIndex(const std::filesystem::path &storage_dir, const std::string &index_name, LabelId label,
+                   memgraph::query::DbAccessor *db);
+
+  void RecoverIndex(const std::filesystem::path &storage_dir, const std::string &index_name, LabelId label,
+                    memgraph::utils::SkipList<Vertex>::Accessor vertices, NameIdMapper *name_id_mapper);
+
+  LabelId DropIndex(const std::filesystem::path &storage_dir, const std::string &index_name);
+
+  bool IndexExists(const std::string &index_name) const;
+
+  std::vector<Gid> Search(const std::string &index_name, const std::string &search_query, text_search_mode search_mode);
+
+  std::string Aggregate(const std::string &index_name, const std::string &search_query,
+                        const std::string &aggregation_query);
+
+  void Commit();
+
+  void Rollback();
+
+  std::vector<std::pair<std::string, LabelId>> ListIndices() const;
+};
+
+}  // namespace memgraph::storage

src/storage/v2/inmemory/storage.cpp

@@ -15,6 +15,8 @@
 #include <functional>
 #include <optional>
 #include "dbms/constants.hpp"
+#include "flags/experimental.hpp"
+#include "flags/run_time_configurable.hpp"
 #include "memory/global_memory_control.hpp"
 #include "storage/v2/durability/durability.hpp"
 #include "storage/v2/durability/snapshot.hpp"
@@ -890,6 +892,10 @@ utils::BasicResult<StorageManipulationError, void> InMemoryStorage::InMemoryAcce
       commit_timestamp_.reset();  // We have aborted, hence we have not committed
       return StorageManipulationError{*unique_constraint_violation};
     }
+
+    if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+      mem_storage->indices_.text_index_.Commit();
+    }
   }
 
   is_transaction_active_ = false;
@@ -1213,6 +1219,9 @@ void InMemoryStorage::InMemoryAccessor::Abort() {
       for (auto const &[property, prop_vertices] : property_cleanup) {
         storage_->indices_.AbortEntries(property, prop_vertices, transaction_.start_timestamp);
       }
+      if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+        storage_->indices_.text_index_.Rollback();
+      }
 
       // VERTICES
       {
@@ -1846,6 +1855,7 @@ StorageInfo InMemoryStorage::GetInfo(memgraph::replication_coordination_glue::Re
     const auto &lbl = access->ListAllIndices();
     info.label_indices = lbl.label.size();
     info.label_property_indices = lbl.label_property.size();
+    info.text_indices = lbl.text_indices.size();
     const auto &con = access->ListAllConstraints();
     info.existence_constraints = con.existence.size();
     info.unique_constraints = con.unique.size();
@@ -2107,6 +2117,16 @@ bool InMemoryStorage::AppendToWal(const Transaction &transaction, uint64_t final
         AppendToWalDataDefinition(durability::StorageMetadataOperation::LABEL_PROPERTY_INDEX_STATS_CLEAR, info.label,
                                   final_commit_timestamp);
       } break;
+      case MetadataDelta::Action::TEXT_INDEX_CREATE: {
+        const auto &info = md_delta.text_index;
+        AppendToWalDataDefinition(durability::StorageMetadataOperation::TEXT_INDEX_CREATE, info.index_name, info.label,
+                                  final_commit_timestamp);
+      } break;
+      case MetadataDelta::Action::TEXT_INDEX_DROP: {
+        const auto &info = md_delta.text_index;
+        AppendToWalDataDefinition(durability::StorageMetadataOperation::TEXT_INDEX_DROP, info.index_name, info.label,
+                                  final_commit_timestamp);
+      } break;
       case MetadataDelta::Action::EXISTENCE_CONSTRAINT_CREATE: {
         const auto &info = md_delta.label_property;
         AppendToWalDataDefinition(durability::StorageMetadataOperation::EXISTENCE_CONSTRAINT_CREATE, info.label,
@@ -2137,11 +2157,13 @@ bool InMemoryStorage::AppendToWal(const Transaction &transaction, uint64_t final
   return repl_storage_state_.FinalizeTransaction(final_commit_timestamp, this, std::move(db_acc));
 }
 
-void InMemoryStorage::AppendToWalDataDefinition(durability::StorageMetadataOperation operation, LabelId label,
+void InMemoryStorage::AppendToWalDataDefinition(durability::StorageMetadataOperation operation,
+                                                const std::optional<std::string> text_index_name, LabelId label,
                                                 const std::set<PropertyId> &properties, LabelIndexStats stats,
                                                 LabelPropertyIndexStats property_stats,
                                                 uint64_t final_commit_timestamp) {
-  wal_file_->AppendOperation(operation, label, properties, stats, property_stats, final_commit_timestamp);
+  wal_file_->AppendOperation(operation, text_index_name, label, properties, stats, property_stats,
+                             final_commit_timestamp);
   repl_storage_state_.AppendOperation(operation, label, properties, stats, property_stats, final_commit_timestamp);
 }
 
@@ -2155,12 +2177,13 @@ void InMemoryStorage::AppendToWalDataDefinition(durability::StorageMetadataOpera
                                                 const std::set<PropertyId> &properties,
                                                 LabelPropertyIndexStats property_stats,
                                                 uint64_t final_commit_timestamp) {
-  return AppendToWalDataDefinition(operation, label, properties, {}, property_stats, final_commit_timestamp);
+  return AppendToWalDataDefinition(operation, std::nullopt, label, properties, {}, property_stats,
+                                   final_commit_timestamp);
 }
 
 void InMemoryStorage::AppendToWalDataDefinition(durability::StorageMetadataOperation operation, LabelId label,
                                                 LabelIndexStats stats, uint64_t final_commit_timestamp) {
-  return AppendToWalDataDefinition(operation, label, {}, stats, {}, final_commit_timestamp);
+  return AppendToWalDataDefinition(operation, std::nullopt, label, {}, stats, {}, final_commit_timestamp);
 }
 
 void InMemoryStorage::AppendToWalDataDefinition(durability::StorageMetadataOperation operation, LabelId label,
@@ -2174,6 +2197,12 @@ void InMemoryStorage::AppendToWalDataDefinition(durability::StorageMetadataOpera
   return AppendToWalDataDefinition(operation, label, {}, {}, final_commit_timestamp);
 }
 
+void InMemoryStorage::AppendToWalDataDefinition(durability::StorageMetadataOperation operation,
+                                                const std::optional<std::string> text_index_name, LabelId label,
+                                                uint64_t final_commit_timestamp) {
+  return AppendToWalDataDefinition(operation, text_index_name, label, {}, {}, {}, final_commit_timestamp);
+}
+
 utils::BasicResult<InMemoryStorage::CreateSnapshotError> InMemoryStorage::CreateSnapshot(
     memgraph::replication_coordination_glue::ReplicationRole replication_role) {
   using memgraph::replication_coordination_glue::ReplicationRole;
@@ -2301,7 +2330,9 @@ IndicesInfo InMemoryStorage::InMemoryAccessor::ListAllIndices() const {
   auto *mem_label_property_index =
       static_cast<InMemoryLabelPropertyIndex *>(in_memory->indices_.label_property_index_.get());
   auto *mem_edge_type_index = static_cast<InMemoryEdgeTypeIndex *>(in_memory->indices_.edge_type_index_.get());
-  return {mem_label_index->ListIndices(), mem_label_property_index->ListIndices(), mem_edge_type_index->ListIndices()};
+  auto &text_index = storage_->indices_.text_index_;
+  return {mem_label_index->ListIndices(), mem_label_property_index->ListIndices(), mem_edge_type_index->ListIndices(),
+          text_index.ListIndices()};
 }
 ConstraintsInfo InMemoryStorage::InMemoryAccessor::ListAllConstraints() const {
   const auto *mem_storage = static_cast<InMemoryStorage *>(storage_);

src/storage/v2/inmemory/storage.hpp

@@ -398,7 +398,7 @@ class InMemoryStorage final : public Storage {
   StorageInfo GetBaseInfo() override;
   StorageInfo GetInfo(memgraph::replication_coordination_glue::ReplicationRole replication_role) override;
 
-  /// Return true in all cases excepted if any sync replicas have not sent confirmation.
+  /// Return true in all cases except if any sync replicas have not sent confirmation.
   [[nodiscard]] bool AppendToWal(const Transaction &transaction, uint64_t final_commit_timestamp,
                                  DatabaseAccessProtector db_acc);
   void AppendToWalDataDefinition(durability::StorageMetadataOperation operation, LabelId label,
@@ -412,9 +412,13 @@ class InMemoryStorage final : public Storage {
   void AppendToWalDataDefinition(durability::StorageMetadataOperation operation, LabelId label,
                                  const std::set<PropertyId> &properties, LabelPropertyIndexStats property_stats,
                                  uint64_t final_commit_timestamp);
-  void AppendToWalDataDefinition(durability::StorageMetadataOperation operation, LabelId label,
+  void AppendToWalDataDefinition(durability::StorageMetadataOperation operation,
+                                 const std::optional<std::string> text_index_name, LabelId label,
                                  const std::set<PropertyId> &properties, LabelIndexStats stats,
                                  LabelPropertyIndexStats property_stats, uint64_t final_commit_timestamp);
+  void AppendToWalDataDefinition(durability::StorageMetadataOperation operation,
+                                 const std::optional<std::string> text_index_name, LabelId label,
+                                 uint64_t final_commit_timestamp);
 
   uint64_t CommitTimestamp(std::optional<uint64_t> desired_commit_timestamp = {});
 

src/storage/v2/metadata_delta.hpp

@@ -37,6 +37,8 @@ struct MetadataDelta {
     LABEL_PROPERTY_INDEX_STATS_CLEAR,
     EDGE_INDEX_CREATE,
     EDGE_INDEX_DROP,
+    TEXT_INDEX_CREATE,
+    TEXT_INDEX_DROP,
     EXISTENCE_CONSTRAINT_CREATE,
     EXISTENCE_CONSTRAINT_DROP,
     UNIQUE_CONSTRAINT_CREATE,
@@ -63,6 +65,10 @@ struct MetadataDelta {
   } edge_index_create;
   static constexpr struct EdgeIndexDrop {
   } edge_index_drop;
+  static constexpr struct TextIndexCreate {
+  } text_index_create;
+  static constexpr struct TextIndexDrop {
+  } text_index_drop;
   static constexpr struct ExistenceConstraintCreate {
   } existence_constraint_create;
   static constexpr struct ExistenceConstraintDrop {
@@ -98,6 +104,12 @@ struct MetadataDelta {
 
   MetadataDelta(EdgeIndexDrop /*tag*/, EdgeTypeId edge_type) : action(Action::EDGE_INDEX_DROP), edge_type(edge_type) {}
 
+  MetadataDelta(TextIndexCreate /*tag*/, std::string index_name, LabelId label)
+      : action(Action::TEXT_INDEX_CREATE), text_index{index_name, label} {}
+
+  MetadataDelta(TextIndexDrop /*tag*/, std::string index_name, LabelId label)
+      : action(Action::TEXT_INDEX_DROP), text_index{index_name, label} {}
+
   MetadataDelta(ExistenceConstraintCreate /*tag*/, LabelId label, PropertyId property)
       : action(Action::EXISTENCE_CONSTRAINT_CREATE), label_property{label, property} {}
 
@@ -127,6 +139,8 @@ struct MetadataDelta {
       case Action::LABEL_PROPERTY_INDEX_STATS_CLEAR:
       case Action::EDGE_INDEX_CREATE:
       case Action::EDGE_INDEX_DROP:
+      case Action::TEXT_INDEX_CREATE:
+      case Action::TEXT_INDEX_DROP:
       case Action::EXISTENCE_CONSTRAINT_CREATE:
       case Action::EXISTENCE_CONSTRAINT_DROP:
         break;
@@ -164,6 +178,11 @@ struct MetadataDelta {
       PropertyId property;
       LabelPropertyIndexStats stats;
     } label_property_stats;
+
+    struct {
+      std::string index_name;
+      LabelId label;
+    } text_index;
   };
 };
 

src/storage/v2/property_store.cpp

@@ -118,7 +118,7 @@ enum class Type : uint8_t {
   STRING = 0x50,
   LIST = 0x60,
   MAP = 0x70,
-  TEMPORAL_DATA = 0x80
+  TEMPORAL_DATA = 0x80,
 };
 
 const uint8_t kMaskType = 0xf0;

src/storage/v2/replication/replication_client.cpp

@@ -406,8 +406,9 @@ void ReplicaStream::AppendOperation(durability::StorageMetadataOperation operati
                                     const std::set<PropertyId> &properties, const LabelIndexStats &stats,
                                     const LabelPropertyIndexStats &property_stats, uint64_t timestamp) {
   replication::Encoder encoder(stream_.GetBuilder());
-  EncodeOperation(&encoder, storage_->name_id_mapper_.get(), operation, label, properties, stats, property_stats,
+  // NOTE: Text search doesn’t have replication in scope yet (Phases 1 and 2) -> text index name not sent here
-                  timestamp);
+  EncodeOperation(&encoder, storage_->name_id_mapper_.get(), operation, std::nullopt, label, properties, stats,
+                  property_stats, timestamp);
 }
 
 void ReplicaStream::AppendOperation(durability::StorageMetadataOperation operation, EdgeTypeId edge_type,

src/storage/v2/storage.cpp

@@ -13,6 +13,8 @@
 #include "absl/container/flat_hash_set.h"
 #include "spdlog/spdlog.h"
 
+#include "flags/experimental.hpp"
+#include "flags/run_time_configurable.hpp"
 #include "storage/v2/disk/name_id_mapper.hpp"
 #include "storage/v2/storage.hpp"
 #include "storage/v2/transaction.hpp"
@@ -273,6 +275,12 @@ Storage::Accessor::DetachDelete(std::vector<VertexAccessor *> nodes, std::vector
     return maybe_deleted_vertices.GetError();
   }
 
+  if (flags::AreExperimentsEnabled(flags::Experiments::TEXT_SEARCH)) {
+    for (auto *node : nodes_to_delete) {
+      storage_->indices_.text_index_.RemoveNode(node);
+    }
+  }
+
   auto deleted_vertices = maybe_deleted_vertices.GetValue();
 
   return std::make_optional<ReturnType>(std::move(deleted_vertices), std::move(deleted_edges));
@@ -543,4 +551,19 @@ void Storage::Accessor::MarkEdgeAsDeleted(Edge *edge) {
   }
 }
 
+void Storage::Accessor::CreateTextIndex(const std::string &index_name, LabelId label, query::DbAccessor *db) {
+  MG_ASSERT(unique_guard_.owns_lock(), "Creating a text index requires unique access to storage!");
+  storage_->indices_.text_index_.CreateIndex(storage_->config_.durability.storage_directory, index_name, label, db);
+  transaction_.md_deltas.emplace_back(MetadataDelta::text_index_create, index_name, label);
+  memgraph::metrics::IncrementCounter(memgraph::metrics::ActiveTextIndices);
+}
+
+void Storage::Accessor::DropTextIndex(const std::string &index_name) {
+  MG_ASSERT(unique_guard_.owns_lock(), "Dropping a text index requires unique access to storage!");
+  auto deleted_index_label =
+      storage_->indices_.text_index_.DropIndex(storage_->config_.durability.storage_directory, index_name);
+  transaction_.md_deltas.emplace_back(MetadataDelta::text_index_drop, index_name, deleted_index_label);
+  memgraph::metrics::DecrementCounter(memgraph::metrics::ActiveTextIndices);
+}
+
 }  // namespace memgraph::storage

src/storage/v2/storage.hpp

@@ -20,6 +20,7 @@
 
 #include "io/network/endpoint.hpp"
 #include "kvstore/kvstore.hpp"
+#include "mg_procedure.h"
 #include "query/exceptions.hpp"
 #include "replication/config.hpp"
 #include "replication/replication_server.hpp"
@@ -53,6 +54,7 @@ extern const Event SnapshotCreationLatency_us;
 
 extern const Event ActiveLabelIndices;
 extern const Event ActiveLabelPropertyIndices;
+extern const Event ActiveTextIndices;
 }  // namespace memgraph::metrics
 
 namespace memgraph::storage {
@@ -63,6 +65,7 @@ struct IndicesInfo {
   std::vector<LabelId> label;
   std::vector<std::pair<LabelId, PropertyId>> label_property;
   std::vector<EdgeTypeId> edge_type;
+  std::vector<std::pair<std::string, LabelId>> text_indices;
 };
 
 struct ConstraintsInfo {
@@ -78,6 +81,7 @@ struct StorageInfo {
   uint64_t disk_usage;
   uint64_t label_indices;
   uint64_t label_property_indices;
+  uint64_t text_indices;
   uint64_t existence_constraints;
   uint64_t unique_constraints;
   StorageMode storage_mode;
@@ -95,6 +99,7 @@ static inline nlohmann::json ToJson(const StorageInfo &info) {
   res["disk"] = info.disk_usage;
   res["label_indices"] = info.label_indices;
   res["label_prop_indices"] = info.label_property_indices;
+  res["text_indices"] = info.text_indices;
   res["existence_constraints"] = info.existence_constraints;
   res["unique_constraints"] = info.unique_constraints;
   res["storage_mode"] = storage::StorageModeToString(info.storage_mode);
@@ -232,6 +237,28 @@ class Storage {
 
     virtual bool EdgeTypeIndexExists(EdgeTypeId edge_type) const = 0;
 
+    bool TextIndexExists(const std::string &index_name) const {
+      return storage_->indices_.text_index_.IndexExists(index_name);
+    }
+
+    void TextIndexAddVertex(const VertexAccessor &vertex) {
+      storage_->indices_.text_index_.AddNode(vertex.vertex_, storage_->name_id_mapper_.get());
+    }
+
+    void TextIndexUpdateVertex(const VertexAccessor &vertex, const std::vector<LabelId> &removed_labels = {}) {
+      storage_->indices_.text_index_.UpdateNode(vertex.vertex_, storage_->name_id_mapper_.get(), removed_labels);
+    }
+
+    std::vector<Gid> TextIndexSearch(const std::string &index_name, const std::string &search_query,
+                                     text_search_mode search_mode) const {
+      return storage_->indices_.text_index_.Search(index_name, search_query, search_mode);
+    }
+
+    std::string TextIndexAggregate(const std::string &index_name, const std::string &search_query,
+                                   const std::string &aggregation_query) const {
+      return storage_->indices_.text_index_.Aggregate(index_name, search_query, aggregation_query);
+    }
+
     virtual IndicesInfo ListAllIndices() const = 0;
 
     virtual ConstraintsInfo ListAllConstraints() const = 0;
@@ -284,6 +311,10 @@ class Storage {
 
     virtual utils::BasicResult<StorageIndexDefinitionError, void> DropIndex(EdgeTypeId edge_type) = 0;
 
+    void CreateTextIndex(const std::string &index_name, LabelId label, query::DbAccessor *db);
+
+    void DropTextIndex(const std::string &index_name);
+
     virtual utils::BasicResult<StorageExistenceConstraintDefinitionError, void> CreateExistenceConstraint(
         LabelId label, PropertyId property) = 0;
 

src/utils/event_counter.cpp

@@ -1,4 +1,4 @@
-// Copyright 2023 Memgraph Ltd.
+// Copyright 2024 Memgraph Ltd.
 //
 // Use of this software is governed by the Business Source License
 // included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
@@ -60,6 +60,7 @@
                                                                                                                      \
   M(ActiveLabelIndices, Index, "Number of active label indices in the system.")                                      \
   M(ActiveLabelPropertyIndices, Index, "Number of active label property indices in the system.")                     \
+  M(ActiveTextIndices, Index, "Number of active text indices in the system.")                                        \
                                                                                                                      \
   M(StreamsCreated, Stream, "Number of Streams created.")                                                            \
   M(MessagesConsumed, Stream, "Number of consumed streamed messages.")                                               \

src/utils/typeinfo.hpp

@@ -187,6 +187,7 @@ enum class TypeId : uint64_t {
   AST_PROFILE_QUERY,
   AST_INDEX_QUERY,
   AST_EDGE_INDEX_QUERY,
+  AST_TEXT_INDEX_QUERY,
   AST_CREATE,
   AST_CALL_PROCEDURE,
   AST_MATCH,

tests/e2e/configuration/default_config.py

@@ -226,6 +226,6 @@ startup_config_dict = {
     "experimental_enabled": (
         "",
         "",
-        "Experimental features to be used, comma seperated. Options [system-replication, high-availability]",
+        "Experimental features to be used, comma-separated. Options [system-replication, text-search, high-availability]",
     ),
 }

tests/e2e/text_search/CMakeLists.txt

@@ -0,0 +1,6 @@
+function(copy_text_search_e2e_python_files FILE_NAME)
+    copy_e2e_python_files(text_search ${FILE_NAME})
+endfunction()
+
+copy_text_search_e2e_python_files(common.py)
+copy_text_search_e2e_python_files(test_text_search.py)

tests/e2e/text_search/common.py

@@ -0,0 +1,87 @@
+# Copyright 2023 Memgraph Ltd.
+#
+# Use of this software is governed by the Business Source License
+# included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+# License, and you may not use this file except in compliance with the Business Source License.
+#
+# As of the Change Date specified in that file, in accordance with
+# the Business Source License, use of this software will be governed
+# by the Apache License, Version 2.0, included in the file
+# licenses/APL.txt.
+
+import typing
+
+import mgclient
+import pytest
+from gqlalchemy import Memgraph
+
+
+def execute_and_fetch_all(cursor: mgclient.Cursor, query: str, params: dict = {}) -> typing.List[tuple]:
+    cursor.execute(query, params)
+    return cursor.fetchall()
+
+
+@pytest.fixture
+def connect(**kwargs) -> mgclient.Connection:
+    connection = mgclient.connect(host="localhost", port=7687, **kwargs)
+    connection.autocommit = True
+    cursor = connection.cursor()
+    execute_and_fetch_all(cursor, """USE DATABASE memgraph""")
+    try:
+        execute_and_fetch_all(cursor, """DROP DATABASE clean""")
+    except:
+        pass
+    execute_and_fetch_all(cursor, """MATCH (n) DETACH DELETE n""")
+    yield connection
+
+
+@pytest.fixture
+def memgraph(**kwargs) -> Memgraph:
+    memgraph = Memgraph()
+
+    yield memgraph
+
+    memgraph.drop_database()
+    memgraph.drop_indexes()
+
+
+@pytest.fixture
+def memgraph_with_text_indexed_data(**kwargs) -> Memgraph:
+    memgraph = Memgraph()
+
+    memgraph.execute(
+        """CREATE (:Document {title: "Rules2024", version: 1, fulltext: "random works", date: date("2023-11-14")});"""
+    )
+    memgraph.execute(
+        """CREATE (:Document {title: "Rules2023", version: 9, fulltext: "text Rules2024", date: date("2023-11-14")});"""
+    )
+    memgraph.execute(
+        """CREATE (:Document:Revision {title: "Rules2024", version: 2, fulltext: "random words", date: date("2023-12-15")});"""
+    )
+    memgraph.execute("""CREATE (:Revision {title: "OperationSchema", version: 3, date: date("2023-10-01")});""")
+    memgraph.execute("""CREATE TEXT INDEX complianceDocuments ON :Document;""")
+
+    yield memgraph
+
+    memgraph.execute("""DROP TEXT INDEX complianceDocuments;""")
+    memgraph.drop_database()
+    memgraph.drop_indexes()
+
+
+@pytest.fixture
+def memgraph_with_mixed_data(**kwargs) -> Memgraph:
+    memgraph = Memgraph()
+
+    memgraph.execute(
+        """CREATE (:Document:Revision {title: "Rules2024", version: 1, date: date("2023-11-14"), contents: "Lorem ipsum dolor sit amet"});"""
+    )
+    memgraph.execute(
+        """CREATE (:Revision {title: "Rules2024", version: 2, date: date("2023-12-15"), contents: "consectetur adipiscing elit"});"""
+    )
+    memgraph.execute("""CREATE TEXT INDEX complianceDocuments ON :Document;""")
+
+    yield memgraph
+
+    memgraph.execute("""DROP TEXT INDEX complianceDocuments;""")
+    memgraph.drop_database()
+    memgraph.drop_indexes()

tests/e2e/text_search/test_text_search.py

@@ -0,0 +1,206 @@
+# Copyright 2024 Memgraph Ltd.
+#
+# Use of this software is governed by the Business Source License
+# included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+# License, and you may not use this file except in compliance with the Business Source License.
+#
+# As of the Change Date specified in that file, in accordance with
+# the Business Source License, use of this software will be governed
+# by the Apache License, Version 2.0, included in the file
+# licenses/APL.txt.
+
+import json
+import re
+import sys
+
+import gqlalchemy
+import mgclient
+import pytest
+from common import memgraph, memgraph_with_mixed_data, memgraph_with_text_indexed_data
+
+GET_RULES_2024_DOCUMENT = """CALL libtext.search("complianceDocuments", "data.title:Rules2024") YIELD node
+             RETURN node.title AS title, node.version AS version
+             ORDER BY version ASC, title ASC;"""
+
+
+def test_create_index(memgraph):
+    memgraph.execute("""CREATE TEXT INDEX exampleIndex ON :Document;""")
+
+    index_info = memgraph.execute_and_fetch("""SHOW INDEX INFO""")
+
+    assert list(index_info) == [
+        {"index type": "text (name: exampleIndex)", "label": "Document", "property": None, "count": None}
+    ]
+
+
+def test_drop_index(memgraph):
+    memgraph.execute("""DROP TEXT INDEX exampleIndex;""")
+
+    index_info = memgraph.execute_and_fetch("""SHOW INDEX INFO""")
+
+    assert list(index_info) == []
+
+
+def test_create_existing_index(memgraph):
+    memgraph.execute("""CREATE TEXT INDEX duplicatedIndex ON :Document;""")
+    with pytest.raises(
+        gqlalchemy.exceptions.GQLAlchemyDatabaseError, match='Text index "duplicatedIndex" already exists.'
+    ) as _:
+        memgraph.execute("""CREATE TEXT INDEX duplicatedIndex ON :Document;""")
+    memgraph.execute("""DROP TEXT INDEX duplicatedIndex;""")  # cleanup
+
+
+def test_drop_nonexistent_index(memgraph):
+    with pytest.raises(
+        gqlalchemy.exceptions.GQLAlchemyDatabaseError, match='Text index "noSuchIndex" doesn’t exist.'
+    ) as _:
+        memgraph.execute("""DROP TEXT INDEX noSuchIndex;""")
+
+
+def test_text_search_given_property(memgraph_with_text_indexed_data):
+    result = list(memgraph_with_text_indexed_data.execute_and_fetch(GET_RULES_2024_DOCUMENT))
+
+    assert len(result) == 2 and result == [{"title": "Rules2024", "version": 1}, {"title": "Rules2024", "version": 2}]
+
+
+def test_text_search_all_properties(memgraph_with_text_indexed_data):
+    SEARCH_QUERY = "Rules2024"
+
+    ALL_PROPERTIES_QUERY = f"""CALL libtext.search_all("complianceDocuments", "{SEARCH_QUERY}") YIELD node
+             RETURN node
+             ORDER BY node.version ASC, node.title ASC;"""
+
+    result = list(memgraph_with_text_indexed_data.execute_and_fetch(ALL_PROPERTIES_QUERY))
+    result_nodes = [record["node"] for record in result]
+
+    assert len(result) == 3 and (
+        result_nodes[0].title == SEARCH_QUERY
+        and result_nodes[1].title == SEARCH_QUERY
+        and SEARCH_QUERY in result_nodes[2].fulltext
+    )
+
+
+def test_regex_text_search(memgraph_with_text_indexed_data):
+    REGEX_QUERY = """CALL libtext.regex_search("complianceDocuments", "wor.*s") YIELD node
+             RETURN node
+             ORDER BY node.version ASC, node.title ASC;"""
+
+    result = list(memgraph_with_text_indexed_data.execute_and_fetch(REGEX_QUERY))
+
+    assert (
+        len(result) == 2
+        and re.search("wor.*s", result[0]["node"].fulltext)
+        and re.search("wor.*s", result[1]["node"].fulltext)
+        # In this test, all values matching the regex string are found in the .node property only ^
+    )
+
+
+def test_text_search_aggregate(memgraph_with_text_indexed_data):
+    input_aggregation = json.dumps({"count": {"value_count": {"field": "metadata.gid"}}}, separators=(",", ":"))
+    expected_aggregation = json.dumps({"count": {"value": 2.0}}, separators=(",", ":"))
+
+    AGGREGATION_QUERY = f"""CALL libtext.aggregate("complianceDocuments", "data.title:Rules2024", '{input_aggregation}')
+                YIELD aggregation
+                RETURN aggregation;"""
+
+    result = list(memgraph_with_text_indexed_data.execute_and_fetch(AGGREGATION_QUERY))
+
+    assert len(result) == 1 and result[0]["aggregation"] == expected_aggregation
+
+
+def test_text_search_query_boolean(memgraph_with_text_indexed_data):
+    BOOLEAN_QUERY = """CALL libtext.search("complianceDocuments", "(data.title:Rules2023 OR data.title:Rules2024) AND data.fulltext:words") YIELD node
+                RETURN node.title AS title, node.version AS version
+                ORDER BY version ASC, title ASC;"""
+
+    result = list(memgraph_with_text_indexed_data.execute_and_fetch(BOOLEAN_QUERY))
+
+    assert len(result) == 1 and result == [{"title": "Rules2024", "version": 2}]
+
+
+def test_create_indexed_node(memgraph_with_text_indexed_data):
+    memgraph_with_text_indexed_data.execute("""CREATE (:Document {title: "Rules2024", version: 3});""")
+
+    result = list(memgraph_with_text_indexed_data.execute_and_fetch(GET_RULES_2024_DOCUMENT))
+
+    assert len(result) == 3 and result == [
+        {"title": "Rules2024", "version": 1},
+        {"title": "Rules2024", "version": 2},
+        {"title": "Rules2024", "version": 3},
+    ]
+
+
+def test_delete_indexed_node(memgraph_with_text_indexed_data):
+    memgraph_with_text_indexed_data.execute("""MATCH (n:Document {title: "Rules2024", version: 2}) DETACH DELETE n;""")
+
+    result = list(memgraph_with_text_indexed_data.execute_and_fetch(GET_RULES_2024_DOCUMENT))
+
+    assert len(result) == 1 and result == [{"title": "Rules2024", "version": 1}]
+
+
+def test_add_indexed_label(memgraph_with_mixed_data):
+    memgraph_with_mixed_data.execute("""MATCH (n:Revision {version:2}) SET n:Document;""")
+
+    result = list(memgraph_with_mixed_data.execute_and_fetch(GET_RULES_2024_DOCUMENT))
+
+    assert len(result) == 2 and result == [{"title": "Rules2024", "version": 1}, {"title": "Rules2024", "version": 2}]
+
+
+def test_remove_indexed_label(memgraph_with_mixed_data):
+    memgraph_with_mixed_data.execute("""MATCH (n:Document {version: 1}) REMOVE n:Document;""")
+
+    result = list(memgraph_with_mixed_data.execute_and_fetch(GET_RULES_2024_DOCUMENT))
+
+    assert len(result) == 0
+
+
+def test_update_text_property_of_indexed_node(memgraph_with_text_indexed_data):
+    memgraph_with_text_indexed_data.execute("""MATCH (n:Document {version:1}) SET n.title = "Rules2030";""")
+
+    result = list(
+        memgraph_with_text_indexed_data.execute_and_fetch(
+            """CALL libtext.search("complianceDocuments", "data.title:Rules2030") YIELD node
+             RETURN node.title AS title, node.version AS version
+             ORDER BY version ASC, title ASC;"""
+        )
+    )
+
+    assert len(result) == 1 and result == [{"title": "Rules2030", "version": 1}]
+
+
+def test_add_unindexable_property_to_indexed_node(memgraph_with_text_indexed_data):
+    try:
+        memgraph_with_text_indexed_data.execute("""MATCH (n:Document {version:1}) SET n.randomList = [2, 3, 4, 5];""")
+    except Exception:
+        assert False
+
+
+def test_remove_indexable_property_from_indexed_node(memgraph_with_text_indexed_data):
+    try:
+        memgraph_with_text_indexed_data.execute(
+            """MATCH (n:Document {version:1}) REMOVE n.title, n.version, n.fulltext, n.date;"""
+        )
+    except Exception:
+        assert False
+
+
+def test_remove_unindexable_property_from_indexed_node(memgraph_with_text_indexed_data):
+    try:
+        memgraph_with_text_indexed_data.execute_and_fetch(
+            """MATCH (n:Document {date: date("2023-12-15")}) REMOVE n.date;"""
+        )
+    except Exception:
+        assert False
+
+
+def test_text_search_nonexistent_index(memgraph_with_text_indexed_data):
+    NONEXISTENT_INDEX_QUERY = """CALL libtext.search("noSuchIndex", "data.fulltext:words") YIELD node
+                RETURN node.title AS title, node.version AS version
+                ORDER BY version ASC, title ASC;"""
+
+    with pytest.raises(mgclient.DatabaseError, match='Text index "noSuchIndex" doesn’t exist.') as _:
+        list(memgraph_with_text_indexed_data.execute_and_fetch(NONEXISTENT_INDEX_QUERY))
+
+
+if __name__ == "__main__":
+    sys.exit(pytest.main([__file__, "-rA"]))

tests/e2e/text_search/test_text_search_disabled.py

@@ -0,0 +1,69 @@
+# Copyright 2024 Memgraph Ltd.
+#
+# Use of this software is governed by the Business Source License
+# included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
+# License, and you may not use this file except in compliance with the Business Source License.
+#
+# As of the Change Date specified in that file, in accordance with
+# the Business Source License, use of this software will be governed
+# by the Apache License, Version 2.0, included in the file
+# licenses/APL.txt.
+
+import json
+import sys
+
+import gqlalchemy
+import pytest
+from common import memgraph
+
+TEXT_SEARCH_DISABLED_ERROR = (
+    "To use text indices and text search, start Memgraph with the experimental text search feature enabled."
+)
+
+
+def test_create_index(memgraph):
+    with pytest.raises(gqlalchemy.exceptions.GQLAlchemyDatabaseError, match=TEXT_SEARCH_DISABLED_ERROR) as _:
+        memgraph.execute("""CREATE TEXT INDEX exampleIndex ON :Document;""")
+
+
+def test_drop_index(memgraph):
+    with pytest.raises(gqlalchemy.exceptions.GQLAlchemyDatabaseError, match=TEXT_SEARCH_DISABLED_ERROR) as _:
+        memgraph.execute("""DROP TEXT INDEX exampleIndex;""")
+
+
+def test_text_search_given_property(memgraph):
+    with pytest.raises(gqlalchemy.exceptions.GQLAlchemyDatabaseError, match=TEXT_SEARCH_DISABLED_ERROR) as _:
+        memgraph.execute(
+            """CALL libtext.search("complianceDocuments", "data.title:Rules2024") YIELD node
+             RETURN node;"""
+        )
+
+
+def test_text_search_all_properties(memgraph):
+    with pytest.raises(gqlalchemy.exceptions.GQLAlchemyDatabaseError, match=TEXT_SEARCH_DISABLED_ERROR) as _:
+        memgraph.execute(
+            """CALL libtext.search_all("complianceDocuments", "Rules2024") YIELD node
+             RETURN node;"""
+        )
+
+
+def test_regex_text_search(memgraph):
+    with pytest.raises(gqlalchemy.exceptions.GQLAlchemyDatabaseError, match=TEXT_SEARCH_DISABLED_ERROR) as _:
+        memgraph.execute(
+            """CALL libtext.regex_search("complianceDocuments", "wor.*s") YIELD node
+             RETURN node;"""
+        )
+
+
+def test_text_search_aggregate(memgraph):
+    with pytest.raises(gqlalchemy.exceptions.GQLAlchemyDatabaseError, match=TEXT_SEARCH_DISABLED_ERROR) as _:
+        input_aggregation = json.dumps({"count": {"value_count": {"field": "metadata.gid"}}}, separators=(",", ":"))
+
+        memgraph.execute(
+            f"""CALL libtext.aggregate("complianceDocuments", "wor.*s", '{input_aggregation}') YIELD aggregation
+            RETURN aggregation;"""
+        )
+
+
+if __name__ == "__main__":
+    sys.exit(pytest.main([__file__, "-rA"]))

tests/e2e/text_search/workloads.yaml

@@ -0,0 +1,33 @@
+text_search_cluster: &text_search_cluster
+  cluster:
+    main:
+      args:
+        [
+          "--bolt-port",
+          "7687",
+          "--log-level=TRACE",
+          "--experimental-enabled=text-search",
+        ]
+      log_file: "text_search.log"
+      setup_queries: []
+      validation_queries: []
+
+text_search_disabled_cluster: &text_search_disabled_cluster
+  cluster:
+    main:
+      args: ["--bolt-port", "7687", "--log-level=TRACE"]
+      log_file: "text_search.log"
+      setup_queries: []
+      validation_queries: []
+
+workloads:
+  - name: "Test behavior of text search in Memgraph"
+    binary: "tests/e2e/pytest_runner.sh"
+    proc: "tests/e2e/text_search/query_modules/"
+    args: ["text_search/test_text_search.py"]
+    <<: *text_search_cluster
+  - name: "Test behavior of text search in Memgraph when disabled"
+    binary: "tests/e2e/pytest_runner.sh"
+    proc: "tests/e2e/text_search/query_modules/"
+    args: ["text_search/test_text_search_disabled.py"]
+    <<: *text_search_disabled_cluster

tests/unit/query_dump.cpp

@@ -71,6 +71,11 @@ struct DatabaseState {
     std::string property;
   };
 
+  struct TextItem {
+    std::string index_name;
+    std::string label;
+  };
+
   struct LabelPropertiesItem {
     std::string label;
     std::set<std::string, std::less<>> properties;
@@ -80,6 +85,7 @@ struct DatabaseState {
   std::set<Edge> edges;
   std::set<LabelItem> label_indices;
   std::set<LabelPropertyItem> label_property_indices;
+  std::set<TextItem> text_indices;
   std::set<LabelPropertyItem> existence_constraints;
   std::set<LabelPropertiesItem> unique_constraints;
 };
@@ -106,6 +112,10 @@ bool operator<(const DatabaseState::LabelPropertyItem &first, const DatabaseStat
   return first.property < second.property;
 }
 
+bool operator<(const DatabaseState::TextItem &first, const DatabaseState::TextItem &second) {
+  return first.index_name < second.index_name && first.label < second.label;
+}
+
 bool operator<(const DatabaseState::LabelPropertiesItem &first, const DatabaseState::LabelPropertiesItem &second) {
   if (first.label != second.label) return first.label < second.label;
   return first.properties < second.properties;
@@ -128,6 +138,10 @@ bool operator==(const DatabaseState::LabelPropertyItem &first, const DatabaseSta
   return first.label == second.label && first.property == second.property;
 }
 
+bool operator==(const DatabaseState::TextItem &first, const DatabaseState::TextItem &second) {
+  return first.index_name == second.index_name && first.label == second.label;
+}
+
 bool operator==(const DatabaseState::LabelPropertiesItem &first, const DatabaseState::LabelPropertiesItem &second) {
   return first.label == second.label && first.properties == second.properties;
 }
@@ -185,6 +199,7 @@ DatabaseState GetState(memgraph::storage::Storage *db) {
   // Capture all indices
   std::set<DatabaseState::LabelItem> label_indices;
   std::set<DatabaseState::LabelPropertyItem> label_property_indices;
+  std::set<DatabaseState::TextItem> text_indices;
   {
     auto info = dba->ListAllIndices();
     for (const auto &item : info.label) {
@@ -193,6 +208,9 @@ DatabaseState GetState(memgraph::storage::Storage *db) {
     for (const auto &item : info.label_property) {
       label_property_indices.insert({dba->LabelToName(item.first), dba->PropertyToName(item.second)});
     }
+    for (const auto &item : info.text_indices) {
+      text_indices.insert({item.first, dba->LabelToName(item.second)});
+    }
   }
 
   // Capture all constraints
@@ -212,7 +230,8 @@ DatabaseState GetState(memgraph::storage::Storage *db) {
     }
   }
 
-  return {vertices, edges, label_indices, label_property_indices, existence_constraints, unique_constraints};
+  return {vertices,          edges, label_indices, label_property_indices, text_indices, existence_constraints,
+          unique_constraints};
 }
 
 auto Execute(memgraph::query::InterpreterContext *context, memgraph::dbms::DatabaseAccess db,

tests/unit/storage_v2_decoder_encoder.cpp

@@ -358,6 +358,8 @@ TEST_F(DecoderEncoderTest, PropertyValueInvalidMarker) {
         case memgraph::storage::durability::Marker::DELTA_LABEL_PROPERTY_INDEX_STATS_CLEAR:
         case memgraph::storage::durability::Marker::DELTA_EDGE_TYPE_INDEX_CREATE:
         case memgraph::storage::durability::Marker::DELTA_EDGE_TYPE_INDEX_DROP:
+        case memgraph::storage::durability::Marker::DELTA_TEXT_INDEX_CREATE:
+        case memgraph::storage::durability::Marker::DELTA_TEXT_INDEX_DROP:
         case memgraph::storage::durability::Marker::DELTA_EXISTENCE_CONSTRAINT_CREATE:
         case memgraph::storage::durability::Marker::DELTA_EXISTENCE_CONSTRAINT_DROP:
         case memgraph::storage::durability::Marker::DELTA_UNIQUE_CONSTRAINT_CREATE:

tests/unit/storage_v2_get_info.cpp

@@ -146,6 +146,7 @@ TYPED_TEST(InfoTest, InfoCheck) {
   ASSERT_LT(info.disk_usage, 1000'000);
   ASSERT_EQ(info.label_indices, 1);
   ASSERT_EQ(info.label_property_indices, 1);
+  ASSERT_EQ(info.text_indices, 0);
   ASSERT_EQ(info.existence_constraints, 0);
   ASSERT_EQ(info.unique_constraints, 2);
   ASSERT_EQ(info.storage_mode, this->mode);

tests/unit/storage_v2_wal_file.cpp

@@ -53,6 +53,10 @@ memgraph::storage::durability::WalDeltaData::Type StorageMetadataOperationToWalD
       return memgraph::storage::durability::WalDeltaData::Type::LABEL_PROPERTY_INDEX_STATS_SET;
     case memgraph::storage::durability::StorageMetadataOperation::LABEL_PROPERTY_INDEX_STATS_CLEAR:
       return memgraph::storage::durability::WalDeltaData::Type::LABEL_PROPERTY_INDEX_STATS_CLEAR;
+    case memgraph::storage::durability::StorageMetadataOperation::TEXT_INDEX_CREATE:
+      return memgraph::storage::durability::WalDeltaData::Type::TEXT_INDEX_CREATE;
+    case memgraph::storage::durability::StorageMetadataOperation::TEXT_INDEX_DROP:
+      return memgraph::storage::durability::WalDeltaData::Type::TEXT_INDEX_DROP;
     case memgraph::storage::durability::StorageMetadataOperation::EXISTENCE_CONSTRAINT_CREATE:
       return memgraph::storage::durability::WalDeltaData::Type::EXISTENCE_CONSTRAINT_CREATE;
     case memgraph::storage::durability::StorageMetadataOperation::EXISTENCE_CONSTRAINT_DROP:
@@ -252,7 +256,7 @@ class DeltaGenerator final {
         ASSERT_TRUE(false) << "Unexpected statistics operation!";
       }
     }
-    wal_file_.AppendOperation(operation, label_id, property_ids, l_stats, lp_stats, timestamp_);
+    wal_file_.AppendOperation(operation, std::nullopt, label_id, property_ids, l_stats, lp_stats, timestamp_);
     if (valid_) {
       UpdateStats(timestamp_, 1);
       memgraph::storage::durability::WalDeltaData data;
@@ -271,6 +275,8 @@ class DeltaGenerator final {
           break;
         case memgraph::storage::durability::StorageMetadataOperation::LABEL_PROPERTY_INDEX_CREATE:
         case memgraph::storage::durability::StorageMetadataOperation::LABEL_PROPERTY_INDEX_DROP:
+        case memgraph::storage::durability::StorageMetadataOperation::TEXT_INDEX_CREATE:
+        case memgraph::storage::durability::StorageMetadataOperation::TEXT_INDEX_DROP:
         case memgraph::storage::durability::StorageMetadataOperation::EXISTENCE_CONSTRAINT_CREATE:
         case memgraph::storage::durability::StorageMetadataOperation::EXISTENCE_CONSTRAINT_DROP:
           data.operation_label_property.label = label;
@@ -313,6 +319,8 @@ class DeltaGenerator final {
         case memgraph::storage::durability::StorageMetadataOperation::LABEL_INDEX_STATS_SET:
         case memgraph::storage::durability::StorageMetadataOperation::LABEL_PROPERTY_INDEX_CREATE:
         case memgraph::storage::durability::StorageMetadataOperation::LABEL_PROPERTY_INDEX_DROP:
+        case memgraph::storage::durability::StorageMetadataOperation::TEXT_INDEX_CREATE:
+        case memgraph::storage::durability::StorageMetadataOperation::TEXT_INDEX_DROP:
         case memgraph::storage::durability::StorageMetadataOperation::EXISTENCE_CONSTRAINT_CREATE:
         case memgraph::storage::durability::StorageMetadataOperation::EXISTENCE_CONSTRAINT_DROP:;
         case memgraph::storage::durability::StorageMetadataOperation::LABEL_PROPERTY_INDEX_STATS_SET: