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Defend against null input in analyze_requires_snapshot(), per report

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from Rushabh Lathia.
This commit is contained in:
Tom Lane 2009-01-08 13:42:33 +00:00
parent 3467f02957
commit 2e9650cbcf
1 changed files with 6 additions and 2 deletions
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8
src/backend/parser/analyze.c
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@ -17,7 +17,7 @@
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group * Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* $PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.386 2009/01/01 17:23:45 momjian Exp $ * $PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.387 2009/01/08 13:42:33 tgl Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -222,13 +222,17 @@ transformStmt(ParseState *pstate, Node *parseTree)
* Returns true if a snapshot must be set before doing parse analysis * Returns true if a snapshot must be set before doing parse analysis
* on the given raw parse tree. * on the given raw parse tree.
* *
* Classification here should match transformStmt(). * Classification here should match transformStmt(); but we also have to
* allow a NULL input (for Parse/Bind of an empty query string).
*/ */
bool bool
analyze_requires_snapshot(Node *parseTree) analyze_requires_snapshot(Node *parseTree)
{ {
bool result; bool result;
if (parseTree == NULL)
return false;
switch (nodeTag(parseTree)) switch (nodeTag(parseTree))
{ {
/* /*