Refactor SQL syntax in issue 7891 tests for consistency and clarity

src/test/regress/expected/issue_7891.out

@@ -207,25 +207,25 @@ SELECT 't2_ref after UPDATE' AS label, * FROM t2_ref;
 (1 row)
 
 -- Creating an additional reference table t3_ref to confirm subquery logic
-create table t3_ref(pkey int, c15 text);
-select create_reference_table('t3_ref');
+CREATE TABLE t3_ref(pkey INT, c15 TEXT);
+SELECT create_reference_table('t3_ref');
  create_reference_table
 ---------------------------------------------------------------------
 
 (1 row)
 
-insert into t3_ref values (99, 'Initial Data');
+INSERT INTO t3_ref VALUES (99, 'Initial Data');
 UPDATE t2_ref SET c15 = '2088-08-08 00:00:00'::timestamp WHERE EXISTS ( SELECT 1 FROM t3_ref);
 SELECT 't2_ref after UPDATE' AS label, * FROM t2_ref;
         label        | vkey | pkey  |           c15
 ---------------------------------------------------------------------
  t2_ref after UPDATE |   14 | 24000 | Sun Aug 08 00:00:00 2088
 (1 row)
 
-SELECT citus_remove_node('localhost', :worker_2_port);
- citus_remove_node
+SELECT 1 FROM citus_remove_node('localhost', :worker_2_port);
+ ?column?
 ---------------------------------------------------------------------
-
+        1
 (1 row)
 
 SELECT 't2_ref after UPDATE - without worker 2' AS label, * FROM t2_ref;
@@ -240,10 +240,10 @@ SELECT 1 FROM citus_add_node('localhost', :worker_2_port);
         1
 (1 row)
 
-SELECT citus_remove_node('localhost', :worker_1_port);
- citus_remove_node
+SELECT 1 FROM citus_remove_node('localhost', :worker_1_port);
+ ?column?
 ---------------------------------------------------------------------
-
+        1
 (1 row)
 
 SELECT 't2_ref after UPDATE - without worker 1' AS label, * FROM t2_ref;

src/test/regress/sql/issue_7891.sql

@@ -165,20 +165,20 @@ UPDATE t2_ref
 SELECT 't2_ref after UPDATE' AS label, * FROM t2_ref;
 
 -- Creating an additional reference table t3_ref to confirm subquery logic
-create table t3_ref(pkey int, c15 text);
-select create_reference_table('t3_ref');
-insert into t3_ref values (99, 'Initial Data');
+CREATE TABLE t3_ref(pkey INT, c15 TEXT);
+SELECT create_reference_table('t3_ref');
+INSERT INTO t3_ref VALUES (99, 'Initial Data');
 
 UPDATE t2_ref SET c15 = '2088-08-08 00:00:00'::timestamp WHERE EXISTS ( SELECT 1 FROM t3_ref);
 
 SELECT 't2_ref after UPDATE' AS label, * FROM t2_ref;
 
-SELECT citus_remove_node('localhost', :worker_2_port);
+SELECT 1 FROM citus_remove_node('localhost', :worker_2_port);
 
 SELECT 't2_ref after UPDATE - without worker 2' AS label, * FROM t2_ref;
 
 SELECT 1 FROM citus_add_node('localhost', :worker_2_port);
-SELECT citus_remove_node('localhost', :worker_1_port);
+SELECT 1 FROM citus_remove_node('localhost', :worker_1_port);
 
 SELECT 't2_ref after UPDATE - without worker 1' AS label, * FROM t2_ref;