From 00045b79416b9f35d124a5eee3f91b38d7df02ee Mon Sep 17 00:00:00 2001
From: sqyyeah <948885883@qq.com>
Date: Thu, 20 Aug 2020 17:09:13 +0800
Subject: [PATCH] disallow explain refresh matview stmt

---
 src/common/backend/parser/gram.y      | 1 -
 src/test/regress/expected/matview.out | 5 +++++
 src/test/regress/sql/matview.sql      | 2 ++
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/common/backend/parser/gram.y b/src/common/backend/parser/gram.y
index bc1b54339..1a5359b9c 100755
--- a/src/common/backend/parser/gram.y
+++ b/src/common/backend/parser/gram.y
@@ -12817,7 +12817,6 @@ ExplainableStmt:
 			| DeclareCursorStmt
 			| CreateAsStmt
 			| CreateMatViewStmt
-			| RefreshMatViewStmt
 			| ExecuteStmt					/* by default all are $$=$1 */
 		;
 
diff --git a/src/test/regress/expected/matview.out b/src/test/regress/expected/matview.out
index aaaf4f307..553c9ad5c 100644
--- a/src/test/regress/expected/matview.out
+++ b/src/test/regress/expected/matview.out
@@ -28,6 +28,11 @@ EXPLAIN (analyze on, costs off)
 --? Total runtime: .* ms
 (4 rows)
 
+EXPLAIN (analyze on, costs off)
+  REFRESH MATERIALIZED VIEW mvtest_tm;
+ERROR:  syntax error at or near "REFRESH"
+LINE 2:   REFRESH MATERIALIZED VIEW mvtest_tm;
+          ^
 SELECT * FROM mvtest_tm ORDER BY type;
  type | totamt 
 ------+--------
diff --git a/src/test/regress/sql/matview.sql b/src/test/regress/sql/matview.sql
index ac32ce356..4a501a37a 100644
--- a/src/test/regress/sql/matview.sql
+++ b/src/test/regress/sql/matview.sql
@@ -14,6 +14,8 @@ SELECT * FROM mvtest_tv ORDER BY type;
 -- create a materialized view with no data, and confirm correct behavior
 EXPLAIN (analyze on, costs off)
   CREATE MATERIALIZED VIEW mvtest_tm AS SELECT type, sum(amt) AS totamt FROM mvtest_t GROUP BY type WITH NO DATA;
+EXPLAIN (analyze on, costs off)
+  REFRESH MATERIALIZED VIEW mvtest_tm;
 SELECT * FROM mvtest_tm ORDER BY type;
 REFRESH MATERIALIZED VIEW mvtest_tm;
 ALTER MATERIALIZED VIEW mvtest_tm set (orientation=column); --error