Fix an oversight in refactoring in 06b10f8.

akorotkov · akorotkov · commit b670b93a66fc · 2024-03-22T15:25:53.000+02:00
It was against intended skipping prechecking keys optimization in the first page of range queries to not influence point queries performance. Reported-by: Anton Melnikov Discussion: https://postgr.es/m/30cd7524-b9f1-4cf8-9c4a-223eb2e34441%40postgrespro.ru Author: Pavel Borisov
diff --git a/src/backend/access/nbtree/nbtsearch.c b/src/backend/access/nbtree/nbtsearch.c
@@ -2498,7 +2498,7 @@ _bt_endpoint(IndexScanDesc scan, ScanDirection dir)
 	/*
 	 * Now load data from the first page of the scan.
 	 */
-	if (!_bt_readpage(scan, dir, start, false))
+	if (!_bt_readpage(scan, dir, start, true))
 	{
 		/*
 		 * There's no actually-matching data on this page.  Try to advance to

Original file line number	Diff line number	Diff line change
`@@ -2498,7 +2498,7 @@ _bt_endpoint(IndexScanDesc scan, ScanDirection dir)`
`2498`	`2498`	`/*`
`2499`	`2499`	`* Now load data from the first page of the scan.`
`2500`	`2500`	`*/`
`2501`		`- if (!_bt_readpage(scan, dir, start, false))`
	`2501`	`+ if (!_bt_readpage(scan, dir, start, true))`
`2502`	`2502`	`{`
`2503`	`2503`	`/*`
`2504`	`2504`	`* There's no actually-matching data on this page. Try to advance to`