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Fix logic in RelWithDebInfo mode (#1397)

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In and only in RelWithDebInfo mode the access of the maybe_unused
variable results in segfaults, this change is making sure that does no
happen ever if the maybe_unused variable is nullopt without changing the
overall logic.
This commit is contained in:
gvolfing 2023-12-06 22:52:28 +01:00 committed by GitHub
parent eceed274d9
commit 7a9c4f5ec4
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 51 additions and 20 deletions
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71
src/query/frontend/ast/cypher_main_visitor.cpp
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@ -1276,28 +1276,59 @@ antlrcpp::Any CypherMainVisitor::visitCallProcedure(MemgraphCypher::CallProcedur
call_proc->result_identifiers_.push_back(storage_->Create<Identifier>(result_alias));
}
} else {
const auto &maybe_found =
procedure::FindProcedure(procedure::gModuleRegistry, call_proc->procedure_name_, utils::NewDeleteResource());
if (!maybe_found) {
throw SemanticException("There is no procedure named '{}'.", call_proc->procedure_name_);
call_proc->is_write_ = maybe_found->second->info.is_write;
auto *yield_ctx = ctx->yieldProcedureResults();
if (!yield_ctx) {
if (!maybe_found->second->results.empty() && !call_proc->void_procedure_) {
throw SemanticException(
"CALL without YIELD may only be used on procedures which do not "
"return any result fields.");
}
// When we return, we will release the lock on modules. This means that
// someone may reload the procedure and change the result signature. But to
// keep the implementation simple, we ignore the case as the rest of the
// code doesn't really care whether we yield or not, so it should not break.
return call_proc;
}
const auto &[module, proc] = *maybe_found;
call_proc->result_fields_.reserve(proc->results.size());
call_proc->result_identifiers_.reserve(proc->results.size());
for (const auto &[result_name, desc] : proc->results) {
bool is_deprecated = desc.second;
if (is_deprecated) continue;
call_proc->result_fields_.emplace_back(result_name);
call_proc->result_identifiers_.push_back(storage_->Create<Identifier>(std::string(result_name)));
if (yield_ctx->getTokens(MemgraphCypher::ASTERISK).empty()) {
call_proc->result_fields_.reserve(yield_ctx->procedureResult().size());
call_proc->result_identifiers_.reserve(yield_ctx->procedureResult().size());
for (auto *result : yield_ctx->procedureResult()) {
MG_ASSERT(result->variable().size() == 1 || result->variable().size() == 2);
call_proc->result_fields_.push_back(std::any_cast<std::string>(result->variable()[0]->accept(this)));
std::string result_alias;
if (result->variable().size() == 2) {
result_alias = std::any_cast<std::string>(result->variable()[1]->accept(this));
} else {
result_alias = std::any_cast<std::string>(result->variable()[0]->accept(this));
}
call_proc->result_identifiers_.push_back(storage_->Create<Identifier>(result_alias));
}
} else {
const auto &maybe_found =
procedure::FindProcedure(procedure::gModuleRegistry, call_proc->procedure_name_, utils::NewDeleteResource());
if (!maybe_found) {
throw SemanticException("There is no procedure named '{}'.", call_proc->procedure_name_);
}
const auto &[module, proc] = *maybe_found;
call_proc->result_fields_.reserve(proc->results.size());
call_proc->result_identifiers_.reserve(proc->results.size());
for (const auto &[result_name, desc] : proc->results) {
bool is_deprecated = desc.second;
if (is_deprecated) continue;
call_proc->result_fields_.emplace_back(result_name);
call_proc->result_identifiers_.push_back(storage_->Create<Identifier>(std::string(result_name)));
}
// When we leave the scope, we will release the lock on modules. This means
// that someone may reload the procedure and change its result signature. We
// are fine with this, because if new result fields were added then we yield
// the subset of those and that will appear to a user as if they used the
// procedure before reload. Any subsequent `CALL ... YIELD *` will fetch the
// new fields as well. In case the result signature has had some result
// fields removed, then the query execution will report an error that we are
// yielding missing fields. The user can then just retry the query.
}
// When we leave the scope, we will release the lock on modules. This means
// that someone may reload the procedure and change its result signature. We
// are fine with this, because if new result fields were added then we yield
// the subset of those and that will appear to a user as if they used the
// procedure before reload. Any subsequent `CALL ... YIELD *` will fetch the
// new fields as well. In case the result signature has had some result
// fields removed, then the query execution will report an error that we are
// yielding missing fields. The user can then just retry the query.
}
return call_proc;