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Defend against null input in analyze_requires_snapshot(), per report

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from Rushabh Lathia.

Back-patch of patch of 2009-01-08.  This is necessary in 8.3, as reported
by Bjorn Munch.  It's not currently necessary in 8.2, AFAICS, but seems
best to include it there too.
This commit is contained in:
Tom Lane 2009-01-30 16:59:16 +00:00
parent fbb70ccd60
commit e06e3d3810
1 changed files with 6 additions and 2 deletions
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8
src/backend/parser/analyze.c
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@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.353.2.2 2008/12/13 02:00:52 tgl Exp $
* $PostgreSQL: pgsql/src/backend/parser/analyze.c,v 1.353.2.3 2009/01/30 16:59:16 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -437,13 +437,17 @@ transformStmt(ParseState *pstate, Node *parseTree,
* Returns true if a snapshot must be set before doing parse analysis
* 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
analyze_requires_snapshot(Node *parseTree)
{
bool result;
if (parseTree == NULL)
return false;
switch (nodeTag(parseTree))
{
/*