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Return NULL instead of 0/0 in pg_last_xlog_receive_location() and

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pg_last_xlog_replay_location(). Per Robert Haas's suggestion, after
Itagaki Takahiro pointed out an issue in the docs. Also, some wording
changes in the docs by me.
This commit is contained in:
Heikki Linnakangas
2010-06-10 07:00:27 +00:00
parent 4ddf151c49
commit 346d7cd7fa
2 changed files with 16 additions and 11 deletions
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8
src/backend/access/transam/xlog.c
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.419 2010/06/09 15:04:06 heikki Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.420 2010/06/10 07:00:27 heikki Exp $
*
*-------------------------------------------------------------------------
*/
@ -8757,6 +8757,9 @@ pg_last_xlog_receive_location(PG_FUNCTION_ARGS)
recptr = GetWalRcvWriteRecPtr();
if (recptr.xlogid == 0 && recptr.xrecoff == 0)
PG_RETURN_NULL();
snprintf(location, sizeof(location), "%X/%X",
recptr.xlogid, recptr.xrecoff);
PG_RETURN_TEXT_P(cstring_to_text(location));
@ -8780,6 +8783,9 @@ pg_last_xlog_replay_location(PG_FUNCTION_ARGS)
recptr = xlogctl->recoveryLastRecPtr;
SpinLockRelease(&xlogctl->info_lck);
if (recptr.xlogid == 0 && recptr.xrecoff == 0)
PG_RETURN_NULL();
snprintf(location, sizeof(location), "%X/%X",
recptr.xlogid, recptr.xrecoff);
PG_RETURN_TEXT_P(cstring_to_text(location));