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Fix nested NOT operation cleanup in tsquery.

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During normalization of tsquery tree it tries to simplify nested NOT
operations but there it's obvioulsy missed that subsequent node could be
a leaf node (value node)

Bug #14245: Segfault on weird to_tsquery
Reported by David Kellum.
This commit is contained in:
Teodor Sigaev
2016-07-15 19:22:18 +03:00
parent ce150e7e0f
commit 19d290155d
3 changed files with 22 additions and 1 deletions
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8
src/backend/utils/adt/tsquery_cleanup.c
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@ -406,6 +406,8 @@ normalize_phrase_tree(NODE *node)
if (node->valnode->qoperator.oper == OP_NOT)
{
NODE *orignode = node;
/* eliminate NOT sequence */
while (node->valnode->type == QI_OPR &&
node->valnode->qoperator.oper == node->right->valnode->qoperator.oper)
@ -413,7 +415,11 @@ normalize_phrase_tree(NODE *node)
node = node->right->right;
}
node->right = normalize_phrase_tree(node->right);
if (orignode != node)
/* current node isn't checked yet */
node = normalize_phrase_tree(node);
else
node->right = normalize_phrase_tree(node->right);
}
else if (node->valnode->qoperator.oper == OP_PHRASE)
{