Add some more citext test cases, per David Wheeler. Also remove the

citext-to-and-from-xml tests, since those caused variation between
installations with or without libxml without really proving much.  Instead
repurpose citext_1.out as the expected results in glibc en_US (and probably
other) locales.

contrib/citext/expected/citext.out

@@ -710,6 +710,30 @@ SELECT 'foo'::citext::name = 'foo'::name AS t;
  t
 (1 row)
 
+SELECT 'f'::char::citext = 'f' AS t;
+ t 
+---
+ t
+(1 row)
+
+SELECT 'f'::citext::char = 'f'::char AS t;
+ t 
+---
+ t
+(1 row)
+
+SELECT 'f'::"char"::citext = 'f' AS t;
+ t 
+---
+ t
+(1 row)
+
+SELECT 'f'::citext::"char" = 'f'::"char" AS t;
+ t 
+---
+ t
+(1 row)
+
 SELECT 'foo'::bytea::citext = 'foo' AS t;
  t 
 ---
@@ -806,18 +830,6 @@ SELECT '08:00:2b:01:02:03'::citext::macaddr = '08:00:2b:01:02:03'::macaddr AS t;
  t
 (1 row)
 
-SELECT '<p>foo</p>'::xml::citext = '<p>foo</p>' AS t;
- t 
----
- t
-(1 row)
-
-SELECT '<p>foo</p>'::citext::xml::text = '<p>foo</p>'::xml::text AS t;
- t 
----
- t
-(1 row)
-
 SELECT '1999-01-08 04:05:06'::timestamp::citext = '1999-01-08 04:05:06'::timestamp::text AS t;
  t 
 ---
@@ -1041,6 +1053,8 @@ CREATE TABLE caster (
     text        text,
     varchar     varchar,
     bpchar      bpchar,
+    char        char,
+    chr         "char",
     name        name,    
     bytea       bytea,
     boolean     boolean,
@@ -1053,7 +1067,6 @@ CREATE TABLE caster (
     cidr        cidr,   
     inet        inet,
     macaddr     macaddr,
-    xml         xml,
     money       money,
     timestamp   timestamp,
     timestamptz timestamptz,
@@ -1083,6 +1096,14 @@ INSERT INTO caster (bpchar)        VALUES ('foo'::text);
 INSERT INTO caster (text)          VALUES ('foo'::bpchar);
 INSERT INTO caster (bpchar)        VALUES ('foo'::citext);
 INSERT INTO caster (citext)        VALUES ('foo'::bpchar);
+INSERT INTO caster (char)          VALUES ('f'::text);
+INSERT INTO caster (text)          VALUES ('f'::char);
+INSERT INTO caster (char)          VALUES ('f'::citext);
+INSERT INTO caster (citext)        VALUES ('f'::char);
+INSERT INTO caster (chr)           VALUES ('f'::text);
+INSERT INTO caster (text)          VALUES ('f'::"char");
+INSERT INTO caster (chr)           VALUES ('f'::citext);
+INSERT INTO caster (citext)        VALUES ('f'::"char");
 INSERT INTO caster (name)          VALUES ('foo'::text);
 INSERT INTO caster (text)          VALUES ('foo'::name);
 INSERT INTO caster (name)          VALUES ('foo'::citext);
@@ -1230,19 +1251,6 @@ LINE 1: INSERT INTO caster (macaddr)       VALUES ('08:00:2b:01:02:0...
                                                    ^
 HINT:  You will need to rewrite or cast the expression.
 INSERT INTO caster (citext)        VALUES ('08:00:2b:01:02:03'::macaddr);
--- Cannot cast to xml on assignment.
-INSERT INTO caster (xml)           VALUES ('<p>foo</p>'::text);
-ERROR:  column "xml" is of type xml but expression is of type text
-LINE 1: INSERT INTO caster (xml)           VALUES ('<p>foo</p>'::tex...
-                                                   ^
-HINT:  You will need to rewrite or cast the expression.
-INSERT INTO caster (text)          VALUES ('<p>foo</p>'::xml);
-INSERT INTO caster (xml)           VALUES ('<p>foo</p>'::citext);
-ERROR:  column "xml" is of type xml but expression is of type citext
-LINE 1: INSERT INTO caster (xml)           VALUES ('<p>foo</p>'::cit...
-                                                   ^
-HINT:  You will need to rewrite or cast the expression.
-INSERT INTO caster (citext)        VALUES ('<p>foo</p>'::xml);
 -- Cannot cast to money on assignment.
 INSERT INTO caster (money)         VALUES ('12'::text);
 ERROR:  column "money" is of type money but expression is of type text

contrib/citext/expected/citext_1.out

@@ -122,25 +122,25 @@ SELECT 'A'::text  <> 'a'::citext AS t;
 SELECT 'B'::citext <  'a'::text AS t;  -- text wins.
  t 
 ---
- t
+ f
 (1 row)
 
 SELECT 'B'::citext <= 'a'::text AS t;  -- text wins.
  t 
 ---
- t
+ f
 (1 row)
 
 SELECT 'a'::citext >  'B'::text AS t;  -- text wins.
  t 
 ---
- t
+ f
 (1 row)
 
 SELECT 'a'::citext >= 'B'::text AS t;  -- text wins.
  t 
 ---
- t
+ f
 (1 row)
 
 -- Test implicit casting. citext casts to varchar, but not vice-versa.
@@ -159,25 +159,25 @@ SELECT 'A'::varchar  <> 'a'::citext AS t;
 SELECT 'B'::citext <  'a'::varchar AS t;  -- varchar wins.
  t 
 ---
- t
+ f
 (1 row)
 
 SELECT 'B'::citext <= 'a'::varchar AS t;  -- varchar wins.
  t 
 ---
- t
+ f
 (1 row)
 
 SELECT 'a'::citext >  'B'::varchar AS t;  -- varchar wins.
  t 
 ---
- t
+ f
 (1 row)
 
 SELECT 'a'::citext >= 'B'::varchar AS t;  -- varchar wins.
  t 
 ---
- t
+ f
 (1 row)
 
 -- A couple of longer examlpes to ensure that we don't get any issues with bad
@@ -710,6 +710,30 @@ SELECT 'foo'::citext::name = 'foo'::name AS t;
  t
 (1 row)
 
+SELECT 'f'::char::citext = 'f' AS t;
+ t 
+---
+ t
+(1 row)
+
+SELECT 'f'::citext::char = 'f'::char AS t;
+ t 
+---
+ t
+(1 row)
+
+SELECT 'f'::"char"::citext = 'f' AS t;
+ t 
+---
+ t
+(1 row)
+
+SELECT 'f'::citext::"char" = 'f'::"char" AS t;
+ t 
+---
+ t
+(1 row)
+
 SELECT 'foo'::bytea::citext = 'foo' AS t;
  t 
 ---
@@ -806,18 +830,6 @@ SELECT '08:00:2b:01:02:03'::citext::macaddr = '08:00:2b:01:02:03'::macaddr AS t;
  t
 (1 row)
 
-SELECT '<p>foo</p>'::xml::citext = '<p>foo</p>' AS t;
-ERROR:  unsupported XML feature
-LINE 1: SELECT '<p>foo</p>'::xml::citext = '<p>foo</p>' AS t;
-               ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-HINT:  You need to rebuild PostgreSQL using --with-libxml.
-SELECT '<p>foo</p>'::citext::xml::text = '<p>foo</p>'::xml::text AS t;
-ERROR:  unsupported XML feature
-LINE 1: SELECT '<p>foo</p>'::citext::xml::text = '<p>foo</p>'::xml::...
-                                                 ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-HINT:  You need to rebuild PostgreSQL using --with-libxml.
 SELECT '1999-01-08 04:05:06'::timestamp::citext = '1999-01-08 04:05:06'::timestamp::text AS t;
  t 
 ---
@@ -1041,6 +1053,8 @@ CREATE TABLE caster (
     text        text,
     varchar     varchar,
     bpchar      bpchar,
+    char        char,
+    chr         "char",
     name        name,    
     bytea       bytea,
     boolean     boolean,
@@ -1053,7 +1067,6 @@ CREATE TABLE caster (
     cidr        cidr,   
     inet        inet,
     macaddr     macaddr,
-    xml         xml,
     money       money,
     timestamp   timestamp,
     timestamptz timestamptz,
@@ -1083,6 +1096,14 @@ INSERT INTO caster (bpchar)        VALUES ('foo'::text);
 INSERT INTO caster (text)          VALUES ('foo'::bpchar);
 INSERT INTO caster (bpchar)        VALUES ('foo'::citext);
 INSERT INTO caster (citext)        VALUES ('foo'::bpchar);
+INSERT INTO caster (char)          VALUES ('f'::text);
+INSERT INTO caster (text)          VALUES ('f'::char);
+INSERT INTO caster (char)          VALUES ('f'::citext);
+INSERT INTO caster (citext)        VALUES ('f'::char);
+INSERT INTO caster (chr)           VALUES ('f'::text);
+INSERT INTO caster (text)          VALUES ('f'::"char");
+INSERT INTO caster (chr)           VALUES ('f'::citext);
+INSERT INTO caster (citext)        VALUES ('f'::"char");
 INSERT INTO caster (name)          VALUES ('foo'::text);
 INSERT INTO caster (text)          VALUES ('foo'::name);
 INSERT INTO caster (name)          VALUES ('foo'::citext);
@@ -1230,29 +1251,6 @@ LINE 1: INSERT INTO caster (macaddr)       VALUES ('08:00:2b:01:02:0...
                                                    ^
 HINT:  You will need to rewrite or cast the expression.
 INSERT INTO caster (citext)        VALUES ('08:00:2b:01:02:03'::macaddr);
--- Cannot cast to xml on assignment.
-INSERT INTO caster (xml)           VALUES ('<p>foo</p>'::text);
-ERROR:  column "xml" is of type xml but expression is of type text
-LINE 1: INSERT INTO caster (xml)           VALUES ('<p>foo</p>'::tex...
-                                                   ^
-HINT:  You will need to rewrite or cast the expression.
-INSERT INTO caster (text)          VALUES ('<p>foo</p>'::xml);
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO caster (text)          VALUES ('<p>foo</p>'::xml...
-                                                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-HINT:  You need to rebuild PostgreSQL using --with-libxml.
-INSERT INTO caster (xml)           VALUES ('<p>foo</p>'::citext);
-ERROR:  column "xml" is of type xml but expression is of type citext
-LINE 1: INSERT INTO caster (xml)           VALUES ('<p>foo</p>'::cit...
-                                                   ^
-HINT:  You will need to rewrite or cast the expression.
-INSERT INTO caster (citext)        VALUES ('<p>foo</p>'::xml);
-ERROR:  unsupported XML feature
-LINE 1: INSERT INTO caster (citext)        VALUES ('<p>foo</p>'::xml...
-                                                   ^
-DETAIL:  This functionality requires the server to be built with libxml support.
-HINT:  You need to rebuild PostgreSQL using --with-libxml.
 -- Cannot cast to money on assignment.
 INSERT INTO caster (money)         VALUES ('12'::text);
 ERROR:  column "money" is of type money but expression is of type text

contrib/citext/sql/citext.sql

@@ -220,6 +220,12 @@ SELECT '4.0'::citext::float8 = 4.0 AS t;
 SELECT 'foo'::name::citext = 'foo' AS t;
 SELECT 'foo'::citext::name = 'foo'::name AS t;
 
+SELECT 'f'::char::citext = 'f' AS t;
+SELECT 'f'::citext::char = 'f'::char AS t;
+
+SELECT 'f'::"char"::citext = 'f' AS t;
+SELECT 'f'::citext::"char" = 'f'::"char" AS t;
+
 SELECT 'foo'::bytea::citext = 'foo' AS t;
 SELECT 'foo'::citext::bytea = 'foo'::bytea AS t;
 
@@ -244,9 +250,6 @@ SELECT '192.168.100.128'::citext::inet = '192.168.100.128'::inet AS t;
 SELECT '08:00:2b:01:02:03'::macaddr::citext = '08:00:2b:01:02:03' AS t;
 SELECT '08:00:2b:01:02:03'::citext::macaddr = '08:00:2b:01:02:03'::macaddr AS t;
 
-SELECT '<p>foo</p>'::xml::citext = '<p>foo</p>' AS t;
-SELECT '<p>foo</p>'::citext::xml::text = '<p>foo</p>'::xml::text AS t;
-
 SELECT '1999-01-08 04:05:06'::timestamp::citext = '1999-01-08 04:05:06'::timestamp::text AS t;
 SELECT '1999-01-08 04:05:06'::citext::timestamp = '1999-01-08 04:05:06'::timestamp AS t;
 SELECT '1999-01-08 04:05:06'::timestamptz::citext = '1999-01-08 04:05:06'::timestamptz::text AS t;
@@ -300,6 +303,8 @@ CREATE TABLE caster (
     text        text,
     varchar     varchar,
     bpchar      bpchar,
+    char        char,
+    chr         "char",
     name        name,    
     bytea       bytea,
     boolean     boolean,
@@ -312,7 +317,6 @@ CREATE TABLE caster (
     cidr        cidr,   
     inet        inet,
     macaddr     macaddr,
-    xml         xml,
     money       money,
     timestamp   timestamp,
     timestamptz timestamptz,
@@ -346,6 +350,16 @@ INSERT INTO caster (text)          VALUES ('foo'::bpchar);
 INSERT INTO caster (bpchar)        VALUES ('foo'::citext);
 INSERT INTO caster (citext)        VALUES ('foo'::bpchar);
 
+INSERT INTO caster (char)          VALUES ('f'::text);
+INSERT INTO caster (text)          VALUES ('f'::char);
+INSERT INTO caster (char)          VALUES ('f'::citext);
+INSERT INTO caster (citext)        VALUES ('f'::char);
+
+INSERT INTO caster (chr)           VALUES ('f'::text);
+INSERT INTO caster (text)          VALUES ('f'::"char");
+INSERT INTO caster (chr)           VALUES ('f'::citext);
+INSERT INTO caster (citext)        VALUES ('f'::"char");
+
 INSERT INTO caster (name)          VALUES ('foo'::text);
 INSERT INTO caster (text)          VALUES ('foo'::name);
 INSERT INTO caster (name)          VALUES ('foo'::citext);
@@ -417,12 +431,6 @@ INSERT INTO caster (text)          VALUES ('08:00:2b:01:02:03'::macaddr);
 INSERT INTO caster (macaddr)       VALUES ('08:00:2b:01:02:03'::citext);
 INSERT INTO caster (citext)        VALUES ('08:00:2b:01:02:03'::macaddr);
 
--- Cannot cast to xml on assignment.
-INSERT INTO caster (xml)           VALUES ('<p>foo</p>'::text);
-INSERT INTO caster (text)          VALUES ('<p>foo</p>'::xml);
-INSERT INTO caster (xml)           VALUES ('<p>foo</p>'::citext);
-INSERT INTO caster (citext)        VALUES ('<p>foo</p>'::xml);
-
 -- Cannot cast to money on assignment.
 INSERT INTO caster (money)         VALUES ('12'::text);
 INSERT INTO caster (text)          VALUES ('12'::money);