Fix typo in comment

alvherre · alvherre · commit 4947fced73c2 · 2017-06-22T16:42:38.000-04:00
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
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c
@@ -3972,7 +3972,7 @@ 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.

Original file line number	Diff line number	Diff line change
`@@ -3972,7 +3972,7 @@ CleanupBackupHistory(void)`
`3972`	`3972`	`/*`
`3973`	`3973`	`* Attempt to read an XLOG record.`
`3974`	`3974`	`*`
`3975`		`- * If RecPtr is not NULL, try to read a record at that position. Otherwise`
	`3975`	`+ * If RecPtr is valid, try to read a record at that position. Otherwise`
`3976`	`3976`	`* try to read a record just after the last one previously read.`
`3977`	`3977`	`*`
`3978`	`3978`	`* If no valid record is available, returns NULL, or fails if emode is PANIC.`