Handle MergeAppend node correctly while determing param types.

Report by Krzysztof Nienartowicz, patch by me.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/backend/pgxc/pool/execRemote.c b/src/backend/pgxc/pool/execRemote.c
index 232c706728..913563b5e1 100644
--- a/src/backend/pgxc/pool/execRemote.c
+++ b/src/backend/pgxc/pool/execRemote.c
@@ -4951,6 +4951,18 @@ determine_param_types(Plan *plan,  struct find_params_context *context)
 			}
 			break;
 
+		case T_MergeAppend:
+			{
+				ListCell   *l;
+
+				foreach(l, ((MergeAppend *) plan)->mergeplans)
+				{
+					if (determine_param_types((Plan *) lfirst(l), context))
+						return true;
+				}
+			}
+			break;
+
 		case T_BitmapAnd:
 			{
 				ListCell   *l;