Fix typo in comment

alvherre · alvherre · commit 82c1507e3067 · 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
@@ -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.

Original file line number	Diff line number	Diff line change
`@@ -4131,7 +4131,7 @@ CleanupBackupHistory(void)`
`4131`	`4131`	`/*`
`4132`	`4132`	`* Attempt to read an XLOG record.`
`4133`	`4133`	`*`
`4134`		`- * If RecPtr is not NULL, try to read a record at that position. Otherwise`
	`4134`	`+ * If RecPtr is valid, try to read a record at that position. Otherwise`
`4135`	`4135`	`* try to read a record just after the last one previously read.`
`4136`	`4136`	`*`
`4137`	`4137`	`* If no valid record is available, returns NULL, or fails if emode is PANIC.`