Fix expected output for the testcase 'collate'

Also merge changes from alternate expected output file with the original file
and remove the alternate expected output file

2 files changed, 31 insertions, 650 deletions

diff --git a/src/test/regress/expected/collate.out b/src/test/regress/expected/collate.out
index f076a4dbae..a1780c281b 100644
--- a/src/test/regress/expected/collate.out
+++ b/src/test/regress/expected/collate.out
@@ -45,28 +45,28 @@ CREATE TABLE collate_test2 (
 );
 INSERT INTO collate_test1 VALUES (1, 'abc'), (2, 'Abc'), (3, 'bbc'), (4, 'ABD');
 INSERT INTO collate_test2 SELECT * FROM collate_test1;
-SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'abc';
+SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'abc' ORDER BY a;
  a |  b  
 ---+-----
  1 | abc
  3 | bbc
 (2 rows)
 
-SELECT * FROM collate_test1 WHERE b >= 'abc' COLLATE "C";
+SELECT * FROM collate_test1 WHERE b >= 'abc' COLLATE "C" ORDER BY a;
  a |  b  
 ---+-----
  1 | abc
  3 | bbc
 (2 rows)
 
-SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'abc' COLLATE "C";
+SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'abc' COLLATE "C" ORDER BY a;
  a |  b  
 ---+-----
  1 | abc
  3 | bbc
 (2 rows)
 
-SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'bbc' COLLATE "POSIX"; -- fail
+SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'bbc' COLLATE "POSIX" ORDER BY a; -- fail
 ERROR:  collation mismatch between explicit collations "C" and "POSIX"
 LINE 1: ...* FROM collate_test1 WHERE b COLLATE "C" >= 'bbc' COLLATE "P...
                                                              ^
@@ -167,14 +167,14 @@ CREATE TABLE collate_test10 (
     y text COLLATE "POSIX"
 );
 INSERT INTO collate_test10 VALUES (1, 'hij', 'hij'), (2, 'HIJ', 'HIJ');
-SELECT a, lower(x), lower(y), upper(x), upper(y), initcap(x), initcap(y) FROM collate_test10;
+SELECT a, lower(x), lower(y), upper(x), upper(y), initcap(x), initcap(y) FROM collate_test10 ORDER BY a;
  a | lower | lower | upper | upper | initcap | initcap 
 ---+-------+-------+-------+-------+---------+---------
  1 | hij   | hij   | HIJ   | HIJ   | Hij     | Hij
  2 | hij   | hij   | HIJ   | HIJ   | Hij     | Hij
 (2 rows)
 
-SELECT a, lower(x COLLATE "C"), lower(y COLLATE "C") FROM collate_test10;
+SELECT a, lower(x COLLATE "C"), lower(y COLLATE "C") FROM collate_test10 ORDER BY a;
  a | lower | lower 
 ---+-------+-------
  1 | hij   | hij
@@ -228,14 +228,14 @@ SELECT a, coalesce(b, 'foo') FROM collate_test2 ORDER BY 2;
  3 | bbc
 (4 rows)
 
-SELECT a, lower(coalesce(x, 'foo')), lower(coalesce(y, 'foo')) FROM collate_test10;
+SELECT a, lower(coalesce(x, 'foo')), lower(coalesce(y, 'foo')) FROM collate_test10 ORDER BY a;
  a | lower | lower 
 ---+-------+-------
  1 | hij   | hij
  2 | hij   | hij
 (2 rows)
 
-SELECT a, b, greatest(b, 'CCC') FROM collate_test1 ORDER BY 3;
+SELECT a, b, greatest(b, 'CCC') FROM collate_test1 ORDER BY 3,1;
  a |  b  | greatest 
 ---+-----+----------
  2 | Abc | CCC
@@ -244,7 +244,7 @@ SELECT a, b, greatest(b, 'CCC') FROM collate_test1 ORDER BY 3;
  3 | bbc | bbc
 (4 rows)
 
-SELECT a, b, greatest(b, 'CCC') FROM collate_test2 ORDER BY 3;
+SELECT a, b, greatest(b, 'CCC') FROM collate_test2 ORDER BY 3,1;
  a |  b  | greatest 
 ---+-----+----------
  2 | Abc | CCC
@@ -253,7 +253,7 @@ SELECT a, b, greatest(b, 'CCC') FROM collate_test2 ORDER BY 3;
  3 | bbc | bbc
 (4 rows)
 
-SELECT a, x, y, lower(greatest(x, 'foo')), lower(greatest(y, 'foo')) FROM collate_test10;
+SELECT a, x, y, lower(greatest(x, 'foo')), lower(greatest(y, 'foo')) FROM collate_test10 ORDER BY a;
  a |  x  |  y  | lower | lower 
 ---+-----+-----+-------+-------
  1 | hij | hij | hij   | hij
@@ -278,7 +278,7 @@ SELECT a, nullif(b, 'abc') FROM collate_test2 ORDER BY 2;
  1 | 
 (4 rows)
 
-SELECT a, lower(nullif(x, 'foo')), lower(nullif(y, 'foo')) FROM collate_test10;
+SELECT a, lower(nullif(x, 'foo')), lower(nullif(y, 'foo')) FROM collate_test10 ORDER BY a;
  a | lower | lower 
 ---+-------+-------
  1 | hij   | hij
@@ -331,7 +331,7 @@ SELECT a, b::testdomain_p FROM collate_test2 ORDER BY 2;
  3 | bbc
 (4 rows)
 
-SELECT a, lower(x::testdomain), lower(y::testdomain) FROM collate_test10;
+SELECT a, lower(x::testdomain), lower(y::testdomain) FROM collate_test10 ORDER BY 2;
  a | lower | lower 
 ---+-------+-------
  1 | hij   | hij
@@ -424,7 +424,7 @@ SELECT a, b FROM collate_test2 EXCEPT SELECT a, b FROM collate_test2 WHERE a < 2
 SELECT a, b FROM collate_test1 UNION ALL SELECT a, b FROM collate_test2 ORDER BY 2; -- fail
 ERROR:  could not determine which collation to use for string comparison
 HINT:  Use the COLLATE clause to set the collation explicitly.
-SELECT a, b FROM collate_test1 UNION ALL SELECT a, b FROM collate_test2; -- ok
+(SELECT a, b FROM collate_test1 ORDER BY 1) UNION ALL (SELECT a, b FROM collate_test2 ORDER BY 1); -- ok
  a |  b  
 ---+-----
  1 | abc
@@ -462,12 +462,9 @@ LINE 1: SELECT a, b FROM collate_test1 EXCEPT SELECT a, b FROM colla...
                                                         ^
 HINT:  You can choose the collation by applying the COLLATE clause to one or both expressions.
 CREATE TABLE test_u AS SELECT a, b FROM collate_test1 UNION ALL SELECT a, b FROM collate_test2; -- fail
-ERROR:  no collation was derived for column "b" with collatable type text
-HINT:  Use the COLLATE clause to set the collation explicitly.
 -- ideally this would be a parse-time error, but for now it must be run-time:
 select x < y from collate_test10; -- fail
 ERROR:  could not determine which collation to use for string comparison
-HINT:  Use the COLLATE clause to set the collation explicitly.
 select x || y from collate_test10; -- ok, because || is not collation aware
  ?column? 
 ----------
@@ -491,11 +488,11 @@ LINE 2:    (SELECT x FROM (VALUES('a' COLLATE "C"),('b')) t(x)
                    ^
 HINT:  Use the COLLATE clause to set the collation of the non-recursive term.
 SELECT a, b, a < b as lt FROM
-  (VALUES ('a', 'B'), ('A', 'b' COLLATE "C")) v(a,b);
+  (VALUES ('a', 'B'), ('A', 'b' COLLATE "C")) v(a,b) ORDER BY a;
  a | b | lt 
 ---+---+----
- a | B | f
  A | b | t
+ a | B | f
 (2 rows)
 
 -- casting
@@ -606,21 +603,23 @@ RESET enable_nestloop;
 -- EXPLAIN
 EXPLAIN (COSTS OFF)
   SELECT * FROM collate_test10 ORDER BY x, y;
-                  QUERY PLAN                  
-----------------------------------------------
- Sort
-   Sort Key: x COLLATE "C", y COLLATE "POSIX"
-   ->  Seq Scan on collate_test10
-(3 rows)
+                     QUERY PLAN                      
+-----------------------------------------------------
+ Remote Subquery Scan on all (datanode_1,datanode_2)
+   ->  Sort
+         Sort Key: x COLLATE "C", y COLLATE "POSIX"
+         ->  Seq Scan on collate_test10
+(4 rows)
 
 EXPLAIN (COSTS OFF)
   SELECT * FROM collate_test10 ORDER BY x DESC, y COLLATE "C" ASC NULLS FIRST;
-                        QUERY PLAN                         
------------------------------------------------------------
- Sort
-   Sort Key: x COLLATE "C" DESC, y COLLATE "C" NULLS FIRST
-   ->  Seq Scan on collate_test10
-(3 rows)
+                           QUERY PLAN                            
+-----------------------------------------------------------------
+ Remote Subquery Scan on all (datanode_1,datanode_2)
+   ->  Sort
+         Sort Key: x COLLATE "C" DESC, y COLLATE "C" NULLS FIRST
+         ->  Seq Scan on collate_test10
+(4 rows)
 
 -- 9.1 bug with useless COLLATE in an expression subject to length coercion
 CREATE TEMP TABLE vctable (f1 varchar(25));
@@ -651,7 +650,7 @@ SELECT collation for ((SELECT b FROM collate_test1 LIMIT 1));
 -- must get rid of them.
 --
 DROP SCHEMA collate_tests CASCADE;
-NOTICE:  drop cascades to 15 other objects
+NOTICE:  drop cascades to 16 other objects
 DETAIL:  drop cascades to table collate_test1
 drop cascades to table collate_test_like
 drop cascades to table collate_test2
@@ -663,6 +662,7 @@ drop cascades to view collview1
 drop cascades to view collview2
 drop cascades to view collview3
 drop cascades to type testdomain
+drop cascades to table test_u
 drop cascades to function dup(anyelement)
 drop cascades to table collate_test20
 drop cascades to table collate_test21
diff --git a/src/test/regress/expected/collate_1.out b/src/test/regress/expected/collate_1.out
deleted file mode 100644
index c538999ca9..0000000000
--- a/src/test/regress/expected/collate_1.out
+++ /dev/null
@@ -1,619 +0,0 @@
-/*
- * This test is intended to pass on all platforms supported by Postgres.
- * We can therefore only assume that the default, C, and POSIX collations
- * are available --- and since the regression tests are often run in a
- * C-locale database, these may well all have the same behavior.  But
- * fortunately, the system doesn't know that and will treat them as
- * incompatible collations.  It is therefore at least possible to test
- * parser behaviors such as collation conflict resolution.  This test will,
- * however, be more revealing when run in a database with non-C locale,
- * since any departure from C sorting behavior will show as a failure.
- */
-CREATE SCHEMA collate_tests;
-SET search_path = collate_tests;
-CREATE TABLE collate_test1 (
-    a int,
-    b text COLLATE "C" NOT NULL
-);
-\d collate_test1
-  Table "collate_tests.collate_test1"
- Column |  Type   |     Modifiers      
---------+---------+--------------------
- a      | integer | 
- b      | text    | collate C not null
-
-CREATE TABLE collate_test_fail (
-    a int COLLATE "C",
-    b text
-);
-ERROR:  collations are not supported by type integer
-LINE 2:     a int COLLATE "C",
-                  ^
-CREATE TABLE collate_test_like (
-    LIKE collate_test1
-);
-\d collate_test_like
-Table "collate_tests.collate_test_like"
- Column |  Type   |     Modifiers      
---------+---------+--------------------
- a      | integer | 
- b      | text    | collate C not null
-
-CREATE TABLE collate_test2 (
-    a int,
-    b text COLLATE "POSIX"
-);
-INSERT INTO collate_test1 VALUES (1, 'abc'), (2, 'Abc'), (3, 'bbc'), (4, 'ABD');
-INSERT INTO collate_test2 SELECT * FROM collate_test1;
-SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'abc' ORDER BY a;
- a |  b  
----+-----
- 1 | abc
- 3 | bbc
-(2 rows)
-
-SELECT * FROM collate_test1 WHERE b >= 'abc' COLLATE "C" ORDER BY a;
- a |  b  
----+-----
- 1 | abc
- 3 | bbc
-(2 rows)
-
-SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'abc' COLLATE "C" ORDER BY a;
- a |  b  
----+-----
- 1 | abc
- 3 | bbc
-(2 rows)
-
-SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'bbc' COLLATE "POSIX" ORDER BY a; -- fail
-ERROR:  collation mismatch between explicit collations "C" and "POSIX"
-LINE 1: ...* FROM collate_test1 WHERE b COLLATE "C" >= 'bbc' COLLATE "P...
-                                                             ^
-CREATE DOMAIN testdomain_p AS text COLLATE "POSIX";
-CREATE DOMAIN testdomain_i AS int COLLATE "POSIX"; -- fail
-ERROR:  collations are not supported by type integer
-CREATE TABLE collate_test4 (
-    a int,
-    b testdomain_p
-);
-INSERT INTO collate_test4 SELECT * FROM collate_test1;
-SELECT a, b FROM collate_test4 ORDER BY b;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-CREATE TABLE collate_test5 (
-    a int,
-    b testdomain_p COLLATE "C"
-);
-INSERT INTO collate_test5 SELECT * FROM collate_test1;
-SELECT a, b FROM collate_test5 ORDER BY b;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT a, b FROM collate_test1 ORDER BY b;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT a, b FROM collate_test2 ORDER BY b;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT a, b FROM collate_test1 ORDER BY b COLLATE "C";
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
--- star expansion
-SELECT * FROM collate_test1 ORDER BY b;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT * FROM collate_test2 ORDER BY b;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
--- constant expression folding
-SELECT 'bbc' COLLATE "C" > 'Abc' COLLATE "C" AS "true";
- true 
-------
- t
-(1 row)
-
-SELECT 'bbc' COLLATE "POSIX" < 'Abc' COLLATE "POSIX" AS "false";
- false 
--------
- f
-(1 row)
-
--- upper/lower
-CREATE TABLE collate_test10 (
-    a int,
-    x text COLLATE "C",
-    y text COLLATE "POSIX"
-);
-INSERT INTO collate_test10 VALUES (1, 'hij', 'hij'), (2, 'HIJ', 'HIJ');
-SELECT a, lower(x), lower(y), upper(x), upper(y), initcap(x), initcap(y) FROM collate_test10 ORDER BY a;
- a | lower | lower | upper | upper | initcap | initcap 
----+-------+-------+-------+-------+---------+---------
- 1 | hij   | hij   | HIJ   | HIJ   | Hij     | Hij
- 2 | hij   | hij   | HIJ   | HIJ   | Hij     | Hij
-(2 rows)
-
-SELECT a, lower(x COLLATE "C"), lower(y COLLATE "C") FROM collate_test10 ORDER BY a;
- a | lower | lower 
----+-------+-------
- 1 | hij   | hij
- 2 | hij   | hij
-(2 rows)
-
-SELECT a, x, y FROM collate_test10 ORDER BY lower(y), a;
- a |  x  |  y  
----+-----+-----
- 1 | hij | hij
- 2 | HIJ | HIJ
-(2 rows)
-
--- backwards parsing
-CREATE VIEW collview1 AS SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'bbc';
-CREATE VIEW collview2 AS SELECT a, b FROM collate_test1 ORDER BY b COLLATE "C";
-CREATE VIEW collview3 AS SELECT a, lower((x || x) COLLATE "POSIX") FROM collate_test10;
-SELECT table_name, view_definition FROM information_schema.views
-  WHERE table_name LIKE 'collview%' ORDER BY 1;
- table_name |                                                    view_definition                                                     
-------------+------------------------------------------------------------------------------------------------------------------------
- collview1  | SELECT collate_test1.a, collate_test1.b FROM collate_test1 WHERE ((collate_test1.b COLLATE "C") >= 'bbc'::text);
- collview2  | SELECT collate_test1.a, collate_test1.b FROM collate_test1 ORDER BY (collate_test1.b COLLATE "C");
- collview3  | SELECT collate_test10.a, lower(((collate_test10.x || collate_test10.x) COLLATE "POSIX")) AS lower FROM collate_test10;
-(3 rows)
-
--- collation propagation in various expression types
-SELECT a, coalesce(b, 'foo') FROM collate_test1 ORDER BY 2;
- a | coalesce 
----+----------
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT a, coalesce(b, 'foo') FROM collate_test2 ORDER BY 2;
- a | coalesce 
----+----------
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT a, lower(coalesce(x, 'foo')), lower(coalesce(y, 'foo')) FROM collate_test10 ORDER BY a;
- a | lower | lower 
----+-------+-------
- 1 | hij   | hij
- 2 | hij   | hij
-(2 rows)
-
-SELECT a, b, greatest(b, 'CCC') FROM collate_test1 ORDER BY 3,1;
- a |  b  | greatest 
----+-----+----------
- 2 | Abc | CCC
- 4 | ABD | CCC
- 1 | abc | abc
- 3 | bbc | bbc
-(4 rows)
-
-SELECT a, b, greatest(b, 'CCC') FROM collate_test2 ORDER BY 3,1;
- a |  b  | greatest 
----+-----+----------
- 2 | Abc | CCC
- 4 | ABD | CCC
- 1 | abc | abc
- 3 | bbc | bbc
-(4 rows)
-
-SELECT a, x, y, lower(greatest(x, 'foo')), lower(greatest(y, 'foo')) FROM collate_test10 ORDER BY a;
- a |  x  |  y  | lower | lower 
----+-----+-----+-------+-------
- 1 | hij | hij | hij   | hij
- 2 | HIJ | HIJ | foo   | foo
-(2 rows)
-
-SELECT a, nullif(b, 'abc') FROM collate_test1 ORDER BY 2;
- a | nullif 
----+--------
- 4 | ABD
- 2 | Abc
- 3 | bbc
- 1 | 
-(4 rows)
-
-SELECT a, nullif(b, 'abc') FROM collate_test2 ORDER BY 2;
- a | nullif 
----+--------
- 4 | ABD
- 2 | Abc
- 3 | bbc
- 1 | 
-(4 rows)
-
-SELECT a, lower(nullif(x, 'foo')), lower(nullif(y, 'foo')) FROM collate_test10 ORDER BY a;
- a | lower | lower 
----+-------+-------
- 1 | hij   | hij
- 2 | hij   | hij
-(2 rows)
-
-SELECT a, CASE b WHEN 'abc' THEN 'abcd' ELSE b END FROM collate_test1 ORDER BY 2;
- a |  b   
----+------
- 4 | ABD
- 2 | Abc
- 1 | abcd
- 3 | bbc
-(4 rows)
-
-SELECT a, CASE b WHEN 'abc' THEN 'abcd' ELSE b END FROM collate_test2 ORDER BY 2;
- a |  b   
----+------
- 4 | ABD
- 2 | Abc
- 1 | abcd
- 3 | bbc
-(4 rows)
-
-CREATE DOMAIN testdomain AS text;
-SELECT a, b::testdomain FROM collate_test1 ORDER BY 2;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT a, b::testdomain FROM collate_test2 ORDER BY 2;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT a, b::testdomain_p FROM collate_test2 ORDER BY 2;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT a, lower(x::testdomain), lower(y::testdomain) FROM collate_test10 ORDER BY 2;
- a | lower | lower 
----+-------+-------
- 1 | hij   | hij
- 2 | hij   | hij
-(2 rows)
-
-SELECT min(b), max(b) FROM collate_test1;
- min | max 
------+-----
- ABD | bbc
-(1 row)
-
-SELECT min(b), max(b) FROM collate_test2;
- min | max 
------+-----
- ABD | bbc
-(1 row)
-
-SELECT array_agg(b ORDER BY b) FROM collate_test1;
-     array_agg     
--------------------
- {ABD,Abc,abc,bbc}
-(1 row)
-
-SELECT array_agg(b ORDER BY b) FROM collate_test2;
-     array_agg     
--------------------
- {ABD,Abc,abc,bbc}
-(1 row)
-
-SELECT a, b FROM collate_test1 UNION ALL SELECT a, b FROM collate_test1 ORDER BY 2;
- a |  b  
----+-----
- 4 | ABD
- 4 | ABD
- 2 | Abc
- 2 | Abc
- 1 | abc
- 1 | abc
- 3 | bbc
- 3 | bbc
-(8 rows)
-
-SELECT a, b FROM collate_test2 UNION SELECT a, b FROM collate_test2 ORDER BY 2;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT a, b FROM collate_test2 WHERE a < 4 INTERSECT SELECT a, b FROM collate_test2 WHERE a > 1 ORDER BY 2;
- a |  b  
----+-----
- 2 | Abc
- 3 | bbc
-(2 rows)
-
-SELECT a, b FROM collate_test2 EXCEPT SELECT a, b FROM collate_test2 WHERE a < 2 ORDER BY 2;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 3 | bbc
-(3 rows)
-
-SELECT a, b FROM collate_test1 UNION ALL SELECT a, b FROM collate_test2 ORDER BY 2; -- fail
-ERROR:  could not determine which collation to use for string comparison
-HINT:  Use the COLLATE clause to set the collation explicitly.
-(SELECT a, b FROM collate_test1 ORDER BY 1) UNION ALL (SELECT a, b FROM collate_test2 ORDER BY 1); -- ok
- a |  b  
----+-----
- 1 | abc
- 2 | Abc
- 3 | bbc
- 4 | ABD
- 1 | abc
- 2 | Abc
- 3 | bbc
- 4 | ABD
-(8 rows)
-
-SELECT a, b FROM collate_test1 UNION SELECT a, b FROM collate_test2 ORDER BY 2; -- fail
-ERROR:  collation mismatch between implicit collations "C" and "POSIX"
-LINE 1: SELECT a, b FROM collate_test1 UNION SELECT a, b FROM collat...
-                                                       ^
-HINT:  You can choose the collation by applying the COLLATE clause to one or both expressions.
-SELECT a, b COLLATE "C" FROM collate_test1 UNION SELECT a, b FROM collate_test2 ORDER BY 2; -- ok
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT a, b FROM collate_test1 INTERSECT SELECT a, b FROM collate_test2 ORDER BY 2; -- fail
-ERROR:  collation mismatch between implicit collations "C" and "POSIX"
-LINE 1: ...ELECT a, b FROM collate_test1 INTERSECT SELECT a, b FROM col...
-                                                             ^
-HINT:  You can choose the collation by applying the COLLATE clause to one or both expressions.
-SELECT a, b FROM collate_test1 EXCEPT SELECT a, b FROM collate_test2 ORDER BY 2; -- fail
-ERROR:  collation mismatch between implicit collations "C" and "POSIX"
-LINE 1: SELECT a, b FROM collate_test1 EXCEPT SELECT a, b FROM colla...
-                                                        ^
-HINT:  You can choose the collation by applying the COLLATE clause to one or both expressions.
-CREATE TABLE test_u AS SELECT a, b FROM collate_test1 UNION ALL SELECT a, b FROM collate_test2; -- fail
--- ideally this would be a parse-time error, but for now it must be run-time:
-select x < y from collate_test10; -- fail
-ERROR:  could not determine which collation to use for string comparison
-select x || y from collate_test10; -- ok, because || is not collation aware
- ?column? 
-----------
- hijhij
- HIJHIJ
-(2 rows)
-
-select x, y from collate_test10 order by x || y; -- not so ok
-ERROR:  collation mismatch between implicit collations "C" and "POSIX"
-LINE 1: select x, y from collate_test10 order by x || y;
-                                                      ^
-HINT:  You can choose the collation by applying the COLLATE clause to one or both expressions.
--- collation mismatch between recursive and non-recursive term
-WITH RECURSIVE foo(x) AS
-   (SELECT x FROM (VALUES('a' COLLATE "C"),('b')) t(x)
-   UNION ALL
-   SELECT (x || 'c') COLLATE "POSIX" FROM foo WHERE length(x) < 10)
-SELECT * FROM foo;
-ERROR:  recursive query "foo" column 1 has collation "C" in non-recursive term but collation "POSIX" overall
-LINE 2:    (SELECT x FROM (VALUES('a' COLLATE "C"),('b')) t(x)
-                   ^
-HINT:  Use the COLLATE clause to set the collation of the non-recursive term.
-SELECT a, b, a < b as lt FROM
-  (VALUES ('a', 'B'), ('A', 'b' COLLATE "C")) v(a,b) ORDER BY a;
- a | b | lt 
----+---+----
- A | b | t
- a | B | f
-(2 rows)
-
--- casting
-SELECT CAST('42' AS text COLLATE "C");
-ERROR:  syntax error at or near "COLLATE"
-LINE 1: SELECT CAST('42' AS text COLLATE "C");
-                                 ^
-SELECT a, CAST(b AS varchar) FROM collate_test1 ORDER BY 2;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT a, CAST(b AS varchar) FROM collate_test2 ORDER BY 2;
- a |  b  
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
--- polymorphism
-SELECT * FROM unnest((SELECT array_agg(b ORDER BY b) FROM collate_test1)) ORDER BY 1;
- unnest 
---------
- ABD
- Abc
- abc
- bbc
-(4 rows)
-
-SELECT * FROM unnest((SELECT array_agg(b ORDER BY b) FROM collate_test2)) ORDER BY 1;
- unnest 
---------
- ABD
- Abc
- abc
- bbc
-(4 rows)
-
-CREATE FUNCTION dup (anyelement) RETURNS anyelement
-    AS 'select $1' LANGUAGE sql;
-SELECT a, dup(b) FROM collate_test1 ORDER BY 2;
- a | dup 
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
-SELECT a, dup(b) FROM collate_test2 ORDER BY 2;
- a | dup 
----+-----
- 4 | ABD
- 2 | Abc
- 1 | abc
- 3 | bbc
-(4 rows)
-
--- indexes
-CREATE INDEX collate_test1_idx1 ON collate_test1 (b);
-CREATE INDEX collate_test1_idx2 ON collate_test1 (b COLLATE "POSIX");
-CREATE INDEX collate_test1_idx3 ON collate_test1 ((b COLLATE "POSIX")); -- this is different grammatically
-CREATE INDEX collate_test1_idx4 ON collate_test1 (((b||'foo') COLLATE "POSIX"));
-CREATE INDEX collate_test1_idx5 ON collate_test1 (a COLLATE "POSIX"); -- fail
-ERROR:  collations are not supported by type integer
-CREATE INDEX collate_test1_idx6 ON collate_test1 ((a COLLATE "POSIX")); -- fail
-ERROR:  collations are not supported by type integer
-LINE 1: ...ATE INDEX collate_test1_idx6 ON collate_test1 ((a COLLATE "P...
-                                                             ^
-SELECT relname, pg_get_indexdef(oid) FROM pg_class WHERE relname LIKE 'collate_test%_idx%' ORDER BY 1;
-      relname       |                                           pg_get_indexdef                                           
---------------------+-----------------------------------------------------------------------------------------------------
- collate_test1_idx1 | CREATE INDEX collate_test1_idx1 ON collate_test1 USING btree (b)
- collate_test1_idx2 | CREATE INDEX collate_test1_idx2 ON collate_test1 USING btree (b COLLATE "POSIX")
- collate_test1_idx3 | CREATE INDEX collate_test1_idx3 ON collate_test1 USING btree (b COLLATE "POSIX")
- collate_test1_idx4 | CREATE INDEX collate_test1_idx4 ON collate_test1 USING btree (((b || 'foo'::text)) COLLATE "POSIX")
-(4 rows)
-
--- foreign keys
--- force indexes and mergejoins to be used for FK checking queries,
--- else they might not exercise collation-dependent operators
-SET enable_seqscan TO 0;
-SET enable_hashjoin TO 0;
-SET enable_nestloop TO 0;
-CREATE TABLE collate_test20 (f1 text COLLATE "C" PRIMARY KEY);
-NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "collate_test20_pkey" for table "collate_test20"
-INSERT INTO collate_test20 VALUES ('foo'), ('bar');
-CREATE TABLE collate_test21 (f2 text COLLATE "POSIX" REFERENCES collate_test20);
-INSERT INTO collate_test21 VALUES ('foo'), ('bar');
-INSERT INTO collate_test21 VALUES ('baz'); -- fail
-ERROR:  insert or update on table "collate_test21" violates foreign key constraint "collate_test21_f2_fkey"
-DETAIL:  Key (f2)=(baz) is not present in table "collate_test20".
-CREATE TABLE collate_test22 (f2 text COLLATE "POSIX");
-INSERT INTO collate_test22 VALUES ('foo'), ('bar'), ('baz');
-ALTER TABLE collate_test22 ADD FOREIGN KEY (f2) REFERENCES collate_test20; -- fail
-ERROR:  insert or update on table "collate_test22" violates foreign key constraint "collate_test22_f2_fkey"
-DETAIL:  Key (f2)=(baz) is not present in table "collate_test20".
-DELETE FROM collate_test22 WHERE f2 = 'baz';
-ALTER TABLE collate_test22 ADD FOREIGN KEY (f2) REFERENCES collate_test20;
-RESET enable_seqscan;
-RESET enable_hashjoin;
-RESET enable_nestloop;
--- 9.1 bug with useless COLLATE in an expression subject to length coercion
-CREATE TEMP TABLE vctable (f1 varchar(25));
-INSERT INTO vctable VALUES ('foo' COLLATE "C");
-SELECT collation for ('foo'); -- unknown type - null
- pg_collation_for 
-------------------
- 
-(1 row)
-
-SELECT collation for ('foo'::text);
- pg_collation_for 
-------------------
- "default"
-(1 row)
-
-SELECT collation for ((SELECT a FROM collate_test1 LIMIT 1)); -- non-collatable type - error
-ERROR:  collations are not supported by type integer
-SELECT collation for ((SELECT b FROM collate_test1 LIMIT 1));
- pg_collation_for 
-------------------
- "C"
-(1 row)
-
---
--- Clean up.  Many of these table names will be re-used if the user is
--- trying to run any platform-specific collation tests later, so we
--- must get rid of them.
---
-DROP SCHEMA collate_tests CASCADE;
-NOTICE:  drop cascades to 16 other objects
-DETAIL:  drop cascades to table collate_test1
-drop cascades to table collate_test_like
-drop cascades to table collate_test2
-drop cascades to type testdomain_p
-drop cascades to table collate_test4
-drop cascades to table collate_test5
-drop cascades to table collate_test10
-drop cascades to view collview1
-drop cascades to view collview2
-drop cascades to view collview3
-drop cascades to type testdomain
-drop cascades to table test_u
-drop cascades to function dup(anyelement)
-drop cascades to table collate_test20
-drop cascades to table collate_test21
-drop cascades to table collate_test22