issue 380.1: reuse resolver used during injectBindParameters(...) in the query transaction (#5548)

arangod/Aql/Ast.cpp

@@ -1459,7 +1459,10 @@ AstNode* Ast::createNodeNaryOperator(AstNodeType type, AstNode const* child) {
 }
 
 /// @brief injects bind parameters into the AST
-void Ast::injectBindParameters(BindParameters& parameters) {
+void Ast::injectBindParameters(
+    BindParameters& parameters,
+    arangodb::CollectionNameResolver const& resolver
+) {
   auto& p = parameters.get();
 
   auto func = [&](AstNode* node) -> AstNode* {
@@ -1499,9 +1502,6 @@ void Ast::injectBindParameters(BindParameters& parameters) {
           );
         }
 
-        // FIXME use external resolver
-        arangodb::CollectionNameResolver resolver(_query->vocbase());
-
         switch (node->getMemberUnchecked(0)->type) {
          case NODE_TYPE_COLLECTION: {
           auto dataSource = resolver.getCollection(value.copyString());
@@ -1522,20 +1522,21 @@ void Ast::injectBindParameters(BindParameters& parameters) {
 
           arangodb::StringRef paramRef(param);
 
-
           for (auto const& it : _writeCollections) {
             auto const& c = it.first;
 
             if (c->type == NODE_TYPE_PARAMETER
                 && paramRef == StringRef(c->getStringValue(), c->getStringLength())) {
               isWriteCollection = true;
+
               break;
             }
           }
 
-          node = createNodeCollection(name, isWriteCollection
-                                    ? AccessMode::Type::WRITE
-                                    : AccessMode::Type::READ);
+          node = createNodeCollection(
+            name,
+            isWriteCollection ? AccessMode::Type::WRITE : AccessMode::Type::READ
+          );
 
           if (isWriteCollection) {
             // must update AST info now for all nodes that contained this parameter

arangod/Aql/Ast.h

@@ -384,7 +384,10 @@ class Ast {
   AstNode* createNodeNaryOperator(AstNodeType, AstNode const*);
 
   /// @brief injects bind parameters into the AST
-  void injectBindParameters(BindParameters&);
+  void injectBindParameters(
+    BindParameters& parameters,
+    arangodb::CollectionNameResolver const& resolver
+  );
 
   /// @brief replace variables
   AstNode* replaceVariables(

arangod/Aql/Query.cpp

@@ -429,14 +429,22 @@ ExecutionPlan* Query::preparePlan() {
   LOG_TOPIC(DEBUG, Logger::QUERIES) << TRI_microtime() - _startTime << " "
                                     << "Query::prepare"
                                     << " this: " << (uintptr_t) this;
+
+  auto ctx = createTransactionContext();
   std::unique_ptr<ExecutionPlan> plan;
 
+  if (!ctx) {
+    THROW_ARANGO_EXCEPTION_MESSAGE(
+      TRI_ERROR_INTERNAL, "failed to create query transaction context"
+    );
+  }
+
   if (!_queryString.empty()) {
     Parser parser(this);
 
     parser.parse(false);
     // put in bind parameters
-    parser.ast()->injectBindParameters(_bindParameters);
+    parser.ast()->injectBindParameters(_bindParameters, ctx->resolver());
   }
 
   TRI_ASSERT(_trx == nullptr);
@@ -450,9 +458,12 @@ ExecutionPlan* Query::preparePlan() {
 #endif
 
   std::unique_ptr<AqlTransaction> trx(AqlTransaction::create(
-                     createTransactionContext(), _collections.collections(),
-                     _queryOptions.transactionOptions,
-                     _part == PART_MAIN, inaccessibleCollections));
+    std::move(ctx),
+    _collections.collections(),
+    _queryOptions.transactionOptions,
+    _part == PART_MAIN,
+    inaccessibleCollections
+  ));
   TRI_DEFER(trx.release());
   // create the transaction object, but do not start it yet
   _trx = trx.get();
@@ -908,19 +919,24 @@ QueryResult Query::explain() {
     init();
     enterState(QueryExecutionState::ValueType::PARSING);
 
+    auto ctx = createTransactionContext();
     Parser parser(this);
 
     parser.parse(true);
+
     // put in bind parameters
-    parser.ast()->injectBindParameters(_bindParameters);
+    parser.ast()->injectBindParameters(_bindParameters, ctx->resolver());
 
     // optimize and validate the ast
     enterState(QueryExecutionState::ValueType::AST_OPTIMIZATION);
 
     // create the transaction object, but do not start it yet
-    _trx = AqlTransaction::create(createTransactionContext(),
-                              _collections.collections(),
-                              _queryOptions.transactionOptions, true);
+    _trx = AqlTransaction::create(
+      std::move(ctx),
+      _collections.collections(),
+      _queryOptions.transactionOptions,
+      true
+    );
 
     // we have an AST
     Result res = _trx->begin();