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Fix typo in comment 

Once upon a time, WAL pointers could be NULL, but no longer.  We talk about
"valid" now.

Reported-by: Amit Langote
Discussion: https://postgr.es/m/33e9617d-27f1-eee8-3311-e27af98eaf2b@lab.ntt.co.jp
This commit is contained in:
Alvaro Herrera 2017-06-22 16:42:38 -04:00
parent 6af9f1bd4b
commit 82c1507e30
1 changed files with 1 additions and 1 deletions
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2
src/backend/access/transam/xlog.c
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@ -4131,7 +4131,7 @@ CleanupBackupHistory(void)
/*
* Attempt to read an XLOG record.
*
* If RecPtr is not NULL, try to read a record at that position. Otherwise
* If RecPtr is valid, try to read a record at that position. Otherwise
* try to read a record just after the last one previously read.
*
* If no valid record is available, returns NULL, or fails if emode is PANIC.