[Michael Paquier <michael@paquier.xyz>]

On Wed, Jul 18, 2018 at 02:35:23PM +0900, Masahiko Sawada wrote:
> Hi,
> 
> While debugging planner I realized that print_path() function is not
> aware of both GatherMerge path and CustomScan path. Attached small
> patch fixes it.

Good catch.  Those should be backpatched.  While I am looking at this
stuff, I have noticed that pathnode.c/reparameterize_path_by_child uses
T_MergeAppend and not T_MergeAppendPath.

inline patch 1: src/backend/optimizer/util/pathnode.c (+1/-1 lines) download inline-1.patch--- a/src/backend/optimizer/util/pathnode.c
+++ b/src/backend/optimizer/util/pathnode.c
@@ -3817,7 +3817,7 @@ do { \
            }
            break;

-       case T_MergeAppend:
+       case T_MergeAppendPath:
            {
                 MergeAppendPath *mapath

This is new as of f49842d1 in v11.  Robert, Ashutosh, am I missing
something?
--
Michael

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