Add explicit ORDER BY to a few tests that exercise hash-join code.

A proposed patch, also by Thomas and in the same thread, would change
the output order of these.  Independent of the follow-up patches
getting committed, nailing down the order in these specific tests at
worst seems harmless.

Author: Thomas Munro
Discussion: https://postgr.es/m/CAEepm=1D4-tP7j7UAgT_j4ZX2j4Ehe1qgZQWFKBMb8F76UW5Rg@mail.gmail.com

src/test/regress/expected/join.out

@@ -4493,80 +4493,84 @@ select count(*) from tenk1 a,
 explain (costs off)
   select * from int8_tbl a,
     int8_tbl x left join lateral (select a.q1 from int4_tbl y) ss(z)
-      on x.q2 = ss.z;
+      on x.q2 = ss.z
+  order by a.q1, a.q2, x.q1, x.q2, ss.z;
                    QUERY PLAN                   
-------------------------------------------
- Nested Loop
+------------------------------------------------
+ Sort
+   Sort Key: a.q1, a.q2, x.q1, x.q2, (a.q1)
+   ->  Nested Loop
          ->  Seq Scan on int8_tbl a
          ->  Hash Right Join
                Hash Cond: ((a.q1) = x.q2)
                ->  Seq Scan on int4_tbl y
                ->  Hash
                      ->  Seq Scan on int8_tbl x
-(7 rows)
+(9 rows)
 
 select * from int8_tbl a,
   int8_tbl x left join lateral (select a.q1 from int4_tbl y) ss(z)
-    on x.q2 = ss.z;
+    on x.q2 = ss.z
+  order by a.q1, a.q2, x.q1, x.q2, ss.z;
         q1        |        q2         |        q1        |        q2         |        z         
 ------------------+-------------------+------------------+-------------------+------------------
+              123 |               456 |              123 |               456 |                 
+              123 |               456 |              123 |  4567890123456789 |                 
+              123 |               456 | 4567890123456789 | -4567890123456789 |                 
               123 |               456 | 4567890123456789 |               123 |              123
               123 |               456 | 4567890123456789 |               123 |              123
               123 |               456 | 4567890123456789 |               123 |              123
               123 |               456 | 4567890123456789 |               123 |              123
               123 |               456 | 4567890123456789 |               123 |              123
               123 |               456 | 4567890123456789 |  4567890123456789 |                 
-              123 |               456 |              123 |  4567890123456789 |                 
-              123 |               456 |              123 |               456 |                 
-              123 |               456 | 4567890123456789 | -4567890123456789 |                 
+              123 |  4567890123456789 |              123 |               456 |                 
+              123 |  4567890123456789 |              123 |  4567890123456789 |                 
+              123 |  4567890123456789 | 4567890123456789 | -4567890123456789 |                 
               123 |  4567890123456789 | 4567890123456789 |               123 |              123
               123 |  4567890123456789 | 4567890123456789 |               123 |              123
               123 |  4567890123456789 | 4567890123456789 |               123 |              123
               123 |  4567890123456789 | 4567890123456789 |               123 |              123
               123 |  4567890123456789 | 4567890123456789 |               123 |              123
               123 |  4567890123456789 | 4567890123456789 |  4567890123456789 |                 
-              123 |  4567890123456789 |              123 |  4567890123456789 |                 
-              123 |  4567890123456789 |              123 |               456 |                 
-              123 |  4567890123456789 | 4567890123456789 | -4567890123456789 |                 
- 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 | -4567890123456789 |              123 |               456 |                 
+ 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
+ 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
+ 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
+ 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
+ 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
+ 4567890123456789 | -4567890123456789 | 4567890123456789 | -4567890123456789 |                 
+ 4567890123456789 | -4567890123456789 | 4567890123456789 |               123 |                 
+ 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 |               123 |              123 |               456 |                 
  4567890123456789 |               123 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
  4567890123456789 |               123 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
  4567890123456789 |               123 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
  4567890123456789 |               123 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
  4567890123456789 |               123 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 |               123 | 4567890123456789 |               123 |                 
- 4567890123456789 |               123 |              123 |               456 |                 
  4567890123456789 |               123 | 4567890123456789 | -4567890123456789 |                 
- 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 |               123 | 4567890123456789 |               123 |                 
+ 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 |               123 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 |  4567890123456789 |              123 |               456 |                 
  4567890123456789 |  4567890123456789 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
  4567890123456789 |  4567890123456789 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
  4567890123456789 |  4567890123456789 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
  4567890123456789 |  4567890123456789 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
  4567890123456789 |  4567890123456789 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 |  4567890123456789 | 4567890123456789 |               123 |                 
- 4567890123456789 |  4567890123456789 |              123 |               456 |                 
  4567890123456789 |  4567890123456789 | 4567890123456789 | -4567890123456789 |                 
- 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
- 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
- 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
- 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
- 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 | -4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
- 4567890123456789 | -4567890123456789 |              123 |  4567890123456789 | 4567890123456789
- 4567890123456789 | -4567890123456789 | 4567890123456789 |               123 |                 
- 4567890123456789 | -4567890123456789 |              123 |               456 |                 
- 4567890123456789 | -4567890123456789 | 4567890123456789 | -4567890123456789 |                 
+ 4567890123456789 |  4567890123456789 | 4567890123456789 |               123 |                 
+ 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
+ 4567890123456789 |  4567890123456789 | 4567890123456789 |  4567890123456789 | 4567890123456789
 (57 rows)
 
 -- lateral reference to a join alias variable

src/test/regress/expected/rowsecurity.out

@@ -448,15 +448,15 @@ CREATE POLICY p2 ON category
 ALTER TABLE category ENABLE ROW LEVEL SECURITY;
 -- cannot delete PK referenced by invisible FK
 SET SESSION AUTHORIZATION regress_rls_bob;
-SELECT * FROM document d FULL OUTER JOIN category c on d.cid = c.cid;
+SELECT * FROM document d FULL OUTER JOIN category c on d.cid = c.cid ORDER BY d.did, c.cid;
  did | cid | dlevel |     dauthor     |       dtitle       | cid |   cname    
 -----+-----+--------+-----------------+--------------------+-----+------------
-   2 |  11 |      2 | regress_rls_bob | my second novel    |  11 | novel
    1 |  11 |      1 | regress_rls_bob | my first novel     |  11 | novel
-     |     |        |                 |                    |  33 | technology
-   5 |  44 |      2 | regress_rls_bob | my second manga    |     | 
-   4 |  44 |      1 | regress_rls_bob | my first manga     |     | 
+   2 |  11 |      2 | regress_rls_bob | my second novel    |  11 | novel
    3 |  22 |      2 | regress_rls_bob | my science fiction |     | 
+   4 |  44 |      1 | regress_rls_bob | my first manga     |     | 
+   5 |  44 |      2 | regress_rls_bob | my second manga    |     | 
+     |     |        |                 |                    |  33 | technology
 (6 rows)
 
 DELETE FROM category WHERE cid = 33;    -- fails with FK violation
@@ -464,12 +464,12 @@ ERROR:  update or delete on table "category" violates foreign key constraint "do
 DETAIL:  Key is still referenced from table "document".
 -- can insert FK referencing invisible PK
 SET SESSION AUTHORIZATION regress_rls_carol;
-SELECT * FROM document d FULL OUTER JOIN category c on d.cid = c.cid;
+SELECT * FROM document d FULL OUTER JOIN category c on d.cid = c.cid ORDER BY d.did, c.cid;
  did | cid | dlevel |      dauthor      |        dtitle         | cid |      cname      
 -----+-----+--------+-------------------+-----------------------+-----+-----------------
    6 |  22 |      1 | regress_rls_carol | great science fiction |  22 | science fiction
-   8 |  44 |      1 | regress_rls_carol | great manga           |  44 | manga
    7 |  33 |      2 | regress_rls_carol | great technology book |     | 
+   8 |  44 |      1 | regress_rls_carol | great manga           |  44 | manga
 (3 rows)
 
 INSERT INTO document VALUES (11, 33, 1, current_user, 'hoge');

src/test/regress/sql/join.sql

@@ -1537,10 +1537,12 @@ select count(*) from tenk1 a,
 explain (costs off)
   select * from int8_tbl a,
     int8_tbl x left join lateral (select a.q1 from int4_tbl y) ss(z)
-      on x.q2 = ss.z;
+      on x.q2 = ss.z
+  order by a.q1, a.q2, x.q1, x.q2, ss.z;
 select * from int8_tbl a,
   int8_tbl x left join lateral (select a.q1 from int4_tbl y) ss(z)
-    on x.q2 = ss.z;
+    on x.q2 = ss.z
+  order by a.q1, a.q2, x.q1, x.q2, ss.z;
 
 -- lateral reference to a join alias variable
 select * from (select f1/2 as x from int4_tbl) ss1 join int4_tbl i4 on x = f1,

src/test/regress/sql/rowsecurity.sql

@@ -178,12 +178,12 @@ ALTER TABLE category ENABLE ROW LEVEL SECURITY;
 
 -- cannot delete PK referenced by invisible FK
 SET SESSION AUTHORIZATION regress_rls_bob;
-SELECT * FROM document d FULL OUTER JOIN category c on d.cid = c.cid;
+SELECT * FROM document d FULL OUTER JOIN category c on d.cid = c.cid ORDER BY d.did, c.cid;
 DELETE FROM category WHERE cid = 33;    -- fails with FK violation
 
 -- can insert FK referencing invisible PK
 SET SESSION AUTHORIZATION regress_rls_carol;
-SELECT * FROM document d FULL OUTER JOIN category c on d.cid = c.cid;
+SELECT * FROM document d FULL OUTER JOIN category c on d.cid = c.cid ORDER BY d.did, c.cid;
 INSERT INTO document VALUES (11, 33, 1, current_user, 'hoge');
 
 -- UNIQUE or PRIMARY KEY constraint violation DOES reveal presence of row