071df2f439
* Split queries into system and data queries * System queries are sequentially executed and generate separate transaction deltas * System transaction try locks for 100ms * last_commited_system_ts saved to DBMS durability * Replicating CREATE/DROP DATABASE * Sending a system snapshot if REPLICA behind * Passing a copy of the gatekeeper::access as std::any to all functions that could call an async execution * Removed delete_on_drop flag (we now always delete on drop) * Using UUID as the directory name for databases * DBMS durability update (added versioning and salient information) * Automatic migration from previous version * Interpreter can run some queries without a target database * SHOW REPLICA returns the status of the currently active DB * Returning UUID instead of db name in the RPC responses * Using UUIDs for database specification in RPC (not name) * FrequentCheck forces update on reconnect * TimestampRpc will detect if a replica is behind, and will update client's state * Safer SLK reads * Split SHOW DATABASES in two SHOW DATABASES (list of current databases) and SHOW DATABASE a single string naming the current database --------- Co-authored-by: Gareth Lloyd <gareth.lloyd@memgraph.io>
52 lines
2.2 KiB
C++
52 lines
2.2 KiB
C++
// Copyright 2023 Memgraph Ltd.
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//
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// Use of this software is governed by the Business Source License
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// included in the file licenses/BSL.txt; by using this file, you agree to be bound by the terms of the Business Source
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// License, and you may not use this file except in compliance with the Business Source License.
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//
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// As of the Change Date specified in that file, in accordance with
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// the Business Source License, use of this software will be governed
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// by the Apache License, Version 2.0, included in the file
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// licenses/APL.txt.
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#include "communication/result_stream_faker.hpp"
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#include "query/interpreter.hpp"
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#include "query/interpreter_context.hpp"
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struct InterpreterFaker {
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InterpreterFaker(memgraph::query::InterpreterContext *interpreter_context, memgraph::dbms::DatabaseAccess db)
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: interpreter_context(interpreter_context), interpreter(interpreter_context, db) {
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interpreter_context->auth_checker = &auth_checker;
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interpreter_context->interpreters.WithLock([this](auto &interpreters) { interpreters.insert(&interpreter); });
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}
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auto Prepare(const std::string &query, const std::map<std::string, memgraph::storage::PropertyValue> ¶ms = {}) {
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const auto [header, _1, qid, _2] = interpreter.Prepare(query, params, {});
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auto &db = interpreter.current_db_.db_acc_;
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ResultStreamFaker stream(db ? db->get()->storage() : nullptr);
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stream.Header(header);
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return std::make_pair(std::move(stream), qid);
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}
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void Pull(ResultStreamFaker *stream, std::optional<int> n = {}, std::optional<int> qid = {}) {
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const auto summary = interpreter.Pull(stream, n, qid);
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stream->Summary(summary);
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}
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/**
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* Execute the given query and commit the transaction.
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*
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* Return the query stream.
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*/
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auto Interpret(const std::string &query, const std::map<std::string, memgraph::storage::PropertyValue> ¶ms = {}) {
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auto prepare_result = Prepare(query, params);
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auto &stream = prepare_result.first;
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auto summary = interpreter.Pull(&stream, {}, prepare_result.second);
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stream.Summary(summary);
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return std::move(stream);
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}
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memgraph::query::AllowEverythingAuthChecker auth_checker;
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memgraph::query::InterpreterContext *interpreter_context;
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memgraph::query::Interpreter interpreter;
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};
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