Remove obsolete _bt_compare() comment.

petergeoghegan · petergeoghegan · commit fe9b92854e7d · 2020-02-18T16:07:16.000-08:00
btbuild() has nothing to say about how NULL values compare in nbtree.
Besides, there are _bt_compare() header comments that describe how NULL
values are handled.
diff --git a/src/backend/access/nbtree/nbtsearch.c b/src/backend/access/nbtree/nbtsearch.c
@@ -601,7 +601,6 @@ _bt_compare(Relation rel,
 
 		datum = index_getattr(itup, scankey->sk_attno, itupdesc, &isNull);
 
-		/* see comments about NULLs handling in btbuild */
 		if (scankey->sk_flags & SK_ISNULL)	/* key is NULL */
 		{
 			if (isNull)

Original file line number	Diff line number	Diff line change
`@@ -601,7 +601,6 @@ _bt_compare(Relation rel,`
`601`	`601`
`602`	`602`	`datum = index_getattr(itup, scankey->sk_attno, itupdesc, &isNull);`
`603`	`603`
`604`		`- /* see comments about NULLs handling in btbuild */`
`605`	`604`	`if (scankey->sk_flags & SK_ISNULL) /* key is NULL */`
`606`	`605`	`{`
`607`	`606`	`if (isNull)`