Remove misleading comment from pathnodes.h.

macdice · macdice · commit a2dec3748075 · 2019-06-25T09:21:54.000+12:00
As of commit e5253fd, it is no longer true that the leader always executes the subplan of a Gather Merge node. Remove comment to that effect. Back-patch to 11. Discussion: https://postgr.es/m/CA%2BhUKGJEaZJYezXAOutuiWT%2BfxCA44%2BoKtVPAND2ubLiigR%3D-w%40mail.gmail.com
diff --git a/src/include/nodes/pathnodes.h b/src/include/nodes/pathnodes.h
@@ -1465,8 +1465,7 @@ typedef struct GatherPath
 
 /*
  * GatherMergePath runs several copies of a plan in parallel and collects
- * the results, preserving their common sort order.  For gather merge, the
- * parallel leader always executes the plan too, so we don't need single_copy.
+ * the results, preserving their common sort order.
  */
 typedef struct GatherMergePath
 {

Original file line number	Diff line number	Diff line change
`@@ -1465,8 +1465,7 @@ typedef struct GatherPath`
`1465`	`1465`
`1466`	`1466`	`/*`
`1467`	`1467`	`* GatherMergePath runs several copies of a plan in parallel and collects`
`1468`		`- * the results, preserving their common sort order. For gather merge, the`
`1469`		`- * parallel leader always executes the plan too, so we don't need single_copy.`
	`1468`	`+ * the results, preserving their common sort order.`
`1470`	`1469`	`*/`
`1471`	`1470`	`typedef struct GatherMergePath`
`1472`	`1471`	`{`