From 8a2ed03f78601596e1f74fa2e75f9cdf52c4ff83 Mon Sep 17 00:00:00 2001
From: Sven Klemm <sven@timescale.com>
Date: Fri, 25 Sep 2020 14:31:55 +0200
Subject: [PATCH] Handle AT_DropExpression in process_utility

PG13 adds a new ALTER TABLE subcommand for dropping the generated
property from a column.

https://github.com/postgres/postgres/commit/f595117e24

Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
Fetch from: https://github.com/timescale/timescaledb/pull/2498/commits/cdb29e2e61ec3f3b52fb8962d12a15727757e35b.patch
---
 src/process_utility.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/process_utility.c b/src/process_utility.c
index 8f915113..0f76f141 100644
--- a/src/process_utility.c
+++ b/src/process_utility.c
@@ -3266,6 +3266,9 @@ process_altertable_end_subcmd(Hypertable *ht, Node *parsetree, ObjectAddress *ob
 		case AT_AddColumnRecurse:
 		case AT_DropColumn:
 		case AT_DropColumnRecurse:
+#if PG13_GE
+		case AT_DropExpression:
+#endif
 
 			/*
 			 * adding and dropping columns handled in
@@ -3276,9 +3279,11 @@ process_altertable_end_subcmd(Hypertable *ht, Node *parsetree, ObjectAddress *ob
 		case AT_DropConstraintRecurse:
 			/* drop constraints handled by process_ddl_sql_drop */
 			break;
-		case AT_ProcessedConstraint:	   /* internal command never hit in our
-											* test code, so don't know how to
-											* handle */
+#if PG13_LT
+		case AT_ProcessedConstraint: /* internal command never hit in our
+									  * test code, so don't know how to
+									  * handle */
+#endif
 		case AT_ReAddComment:			   /* internal command never hit in our test
 											* code, so don't know how to handle */
 		case AT_AddColumnToView:		   /* only used with views */
-- 
2.29.2