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Fix core dump due to null-pointer dereference in to_char() when datetime

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format codes are misapplied to a numeric argument.  (The code still produces
a pretty bogus error message in such cases, but I'll settle for stopping the
crash for now.)  Per bug #4700 from Sergey Burladyan.

Problem exists in all supported branches, so patch all the way back.
In HEAD, also clean up some ugly coding in the nearby cache management
code.
This commit is contained in:
Tom Lane 2009-03-12 00:53:48 +00:00
parent 2723d927e6
commit 6578c68207
1 changed files with 2 additions and 2 deletions
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4
src/backend/utils/adt/formatting.c
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@ -1,7 +1,7 @@
/* -----------------------------------------------------------------------
* formatting.c
*
* $PostgreSQL: pgsql/src/backend/utils/adt/formatting.c,v 1.101.2.4 2007/06/29 01:51:56 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/formatting.c,v 1.101.2.5 2009/03/12 00:53:48 tgl Exp $
*
*
* Portions Copyright (c) 1999-2005, PostgreSQL Global Development Group
@ -347,7 +347,7 @@ static int DCHCounter = 0;
/* global cache for --- number part */
static NUMCacheEntry NUMCache[NUM_CACHE_FIELDS + 1];
static NUMCacheEntry *last_NUMCacheEntry;
static NUMCacheEntry *last_NUMCacheEntry = NUMCache + 0;
static int n_NUMCache = 0; /* number of entries */
static int NUMCounter = 0;