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Code Issues

Fixed bug #7276 : Firebird 4 literal containing crashes server

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This commit is contained in:
Vlad Khorsun 2022-08-22 21:38:35 +03:00
parent f6d9920adb
commit 48a95c0f26
1 changed files with 3 additions and 1 deletions
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4
src/jrd/optimizer/Optimizer.cpp
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@ -3000,10 +3000,12 @@ BoolExprNode* Optimizer::makeInferenceNode(BoolExprNode* boolean,
// Share impure area for cached invariant value used to hold pre-compiled
// pattern for new LIKE and CONTAINING algorithms.
// Cached pattern matcher also should be shared by both nodes, else new node
// could overwrite impure area at offset zero. See bug GH-7276.
// Proper cloning of impure area for this node would require careful accounting
// of new invariant dependencies - we avoid such hassles via using single
// cached pattern value for all node clones. This is faster too.
if (newCmpNode->nodFlags & ExprNode::FLAG_INVARIANT)
if (newCmpNode->nodFlags & (ExprNode::FLAG_INVARIANT | ExprNode::FLAG_PATTERN_MATCHER_CACHE))
newCmpNode->impureOffset = cmpNode->impureOffset;
// But substitute new values for some of the predicate arguments