From 22251c5e31f377c1a95de69d2c3de87272ccb407 Mon Sep 17 00:00:00 2001
From: liang_-123 <i121426365@163.com>
Date: Wed, 30 Dec 2020 17:08:10 +0800
Subject: [PATCH] fix unrecognized node type 355 for outer join

---
 src/common/backend/nodes/nodeFuncs.cpp |  1 +
 src/test/regress/expected/join.out     | 13 +++++++++++++
 src/test/regress/sql/join.sql          |  9 +++++++++
 3 files changed, 23 insertions(+)

diff --git a/src/common/backend/nodes/nodeFuncs.cpp b/src/common/backend/nodes/nodeFuncs.cpp
index f167c9dbf..1a64b2e9f 100755
--- a/src/common/backend/nodes/nodeFuncs.cpp
+++ b/src/common/backend/nodes/nodeFuncs.cpp
@@ -2759,6 +2759,7 @@ bool raw_expression_tree_walker(Node* node, bool (*walker)(), void* context)
         case T_ParamRef:
         case T_A_Const:
         case T_A_Star:
+        case T_Rownum:
             /* primitive node types with no subnodes */
             break;
         case T_Alias:
diff --git a/src/test/regress/expected/join.out b/src/test/regress/expected/join.out
index 478983cc4..47f41ac1c 100644
--- a/src/test/regress/expected/join.out
+++ b/src/test/regress/expected/join.out
@@ -3763,3 +3763,16 @@ select * from hash_right_anti_y where not exists (select hash_right_anti_x.y fro
 
 drop table hash_right_anti_x;
 drop table hash_right_anti_y;
+-- test rownum in outer join
+create table t_a (id int, name varchar(10), code int);
+create table t_b (id int, name varchar(10), code int);
+insert into t_a values (1, 'tom', 3);
+insert into t_b values (1, 'bat', 6);
+select * from t_a a, t_b b where a.id(+) = b.id and rownum = 1;
+ id | name | code | id | name | code 
+----+------+------+----+------+------
+  1 | tom  |    3 |  1 | bat  |    6
+(1 row)
+
+drop table t_a;
+drop table t_b;
diff --git a/src/test/regress/sql/join.sql b/src/test/regress/sql/join.sql
index 46d33af9a..7c3202593 100644
--- a/src/test/regress/sql/join.sql
+++ b/src/test/regress/sql/join.sql
@@ -1208,3 +1208,12 @@ select * from hash_right_anti_y where not exists (select hash_right_anti_x.y fro
 
 drop table hash_right_anti_x;
 drop table hash_right_anti_y;
+
+-- test rownum in outer join
+create table t_a (id int, name varchar(10), code int);
+create table t_b (id int, name varchar(10), code int);
+insert into t_a values (1, 'tom', 3);
+insert into t_b values (1, 'bat', 6);
+select * from t_a a, t_b b where a.id(+) = b.id and rownum = 1;
+drop table t_a;
+drop table t_b;