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Change the timestamps recorded in transaction commit/abort xlog records

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from time_t to TimestampTz representation.  This provides full gettimeofday()
resolution of the timestamps, which might be useful when attempting to
do point-in-time recovery --- previously it was not possible to specify
the stop point with sub-second resolution.  But mostly this is to get
rid of TimestampTz-to-time_t conversion overhead during commit.  Per my
proposal of a day or two back.
This commit is contained in:
Tom Lane
2007-04-30 21:01:53 +00:00
parent 641912b4d1
commit c432061963
7 changed files with 67 additions and 42 deletions
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4
src/include/utils/timestamp.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.68 2007/04/30 03:23:49 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.69 2007/04/30 21:01:53 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -318,6 +318,8 @@ extern bool TimestampDifferenceExceeds(TimestampTz start_time,
extern TimestampTz time_t_to_timestamptz(time_t tm);
extern time_t timestamptz_to_time_t(TimestampTz t);
extern const char *timestamptz_to_str(TimestampTz t);
extern int tm2timestamp(struct pg_tm * tm, fsec_t fsec, int *tzp, Timestamp *dt);
extern int timestamp2tm(Timestamp dt, int *tzp, struct pg_tm * tm,
fsec_t *fsec, char **tzn, pg_tz *attimezone);