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Prevent integer overflow within the integer-datetimes version of 

TimestampTzPlusMilliseconds.  An integer argument of more than INT_MAX/1000
milliseconds (ie, about 35 minutes) would provoke a wrong result, resulting
in incorrect enforcement of statement_timestamp values larger than that.
Bug was introduced in my rewrite of 2006-06-20, which fixed some other
overflow risks, but missed this one :-(  Per report from Elein.
This commit is contained in:
Tom Lane 2008-01-23 21:26:13 +00:00
parent 1570d0467a
commit b9ff7443e6
1 changed files with 2 additions and 2 deletions
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4
src/include/utils/timestamp.h
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@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.73 2008/01/01 19:45:59 momjian Exp $
* $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.74 2008/01/23 21:26:13 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -182,7 +182,7 @@ typedef double fsec_t;
#define INTERVAL_RANGE(t) (((t) >> 16) & INTERVAL_RANGE_MASK)
#ifdef HAVE_INT64_TIMESTAMP
#define TimestampTzPlusMilliseconds(tz,ms) ((tz) + ((ms) * 1000))
#define TimestampTzPlusMilliseconds(tz,ms) ((tz) + ((ms) * (int64) 1000))
#else
#define TimestampTzPlusMilliseconds(tz,ms) ((tz) + ((ms) / 1000.0))
#endif