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Add citext_pattern_ops for citext contrib module

Browse Source 
This is similar to text_pattern_ops.

Alexey Chernyshov, reviewed by Jacob Champion.
pull/31/head^2
Andrew Dunstan 8 years ago
parent f8e5f156b3
commit f246499764
5 changed files with 1013 additions and 0 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 74
      contrib/citext/citext--1.4--1.5.sql
  2. 121
      contrib/citext/citext.c
  3. 370
      contrib/citext/expected/citext.out
  4. 370
      contrib/citext/expected/citext_1.out
  5. 78
      contrib/citext/sql/citext.sql

74
contrib/citext/citext--1.4--1.5.sql
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@ -12,3 +12,77 @@ ALTER OPERATOR >= (citext, citext) SET (
RESTRICT = scalargesel,
JOIN = scalargejoinsel
);
CREATE FUNCTION citext_pattern_lt( citext, citext )
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE FUNCTION citext_pattern_le( citext, citext )
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE FUNCTION citext_pattern_gt( citext, citext )
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE FUNCTION citext_pattern_ge( citext, citext )
RETURNS bool
AS 'MODULE_PATHNAME'
LANGUAGE C IMMUTABLE STRICT PARALLEL SAFE;
CREATE OPERATOR ~<~ (
LEFTARG = CITEXT,
RIGHTARG = CITEXT,
NEGATOR = ~>=~,
COMMUTATOR = ~>~,
PROCEDURE = citext_pattern_lt,
RESTRICT = scalarltsel,
JOIN = scalarltjoinsel
);
CREATE OPERATOR ~<=~ (
LEFTARG = CITEXT,
RIGHTARG = CITEXT,
NEGATOR = ~>~,
COMMUTATOR = ~>=~,
PROCEDURE = citext_pattern_le,
RESTRICT = scalarltsel,
JOIN = scalarltjoinsel
);
CREATE OPERATOR ~>=~ (
LEFTARG = CITEXT,
RIGHTARG = CITEXT,
NEGATOR = ~<~,
COMMUTATOR = ~<=~,
PROCEDURE = citext_pattern_ge,
RESTRICT = scalargtsel,
JOIN = scalargtjoinsel
);
CREATE OPERATOR ~>~ (
LEFTARG = CITEXT,
RIGHTARG = CITEXT,
NEGATOR = ~<=~,
COMMUTATOR = ~<~,
PROCEDURE = citext_pattern_gt,
RESTRICT = scalargtsel,
JOIN = scalargtjoinsel
);
CREATE FUNCTION citext_pattern_cmp(citext, citext)
RETURNS int4
AS 'MODULE_PATHNAME'
LANGUAGE C STRICT IMMUTABLE PARALLEL SAFE;
CREATE OPERATOR CLASS citext_pattern_ops
FOR TYPE CITEXT USING btree AS
OPERATOR 1 ~<~ (citext, citext),
OPERATOR 2 ~<=~ (citext, citext),
OPERATOR 3 = (citext, citext),
OPERATOR 4 ~>=~ (citext, citext),
OPERATOR 5 ~>~ (citext, citext),
FUNCTION 1 citext_pattern_cmp(citext, citext);

121
contrib/citext/citext.c
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@ -18,6 +18,7 @@ PG_MODULE_MAGIC;
*/
static int32 citextcmp(text *left, text *right, Oid collid);
static int32 internal_citext_pattern_cmp(text *left, text *right, Oid collid);
/*
* =================
@ -58,6 +59,41 @@ citextcmp(text *left, text *right, Oid collid)
return result;
}
/*
* citext_pattern_cmp()
* Internal character-by-character comparison function for citext strings.
* Returns int32 negative, zero, or positive.
*/
static int32
internal_citext_pattern_cmp(text *left, text *right, Oid collid)
{
char *lcstr,
*rcstr;
int llen,
rlen;
int32 result;
lcstr = str_tolower(VARDATA_ANY(left), VARSIZE_ANY_EXHDR(left), DEFAULT_COLLATION_OID);
rcstr = str_tolower(VARDATA_ANY(right), VARSIZE_ANY_EXHDR(right), DEFAULT_COLLATION_OID);
llen = strlen(lcstr);
rlen = strlen(rcstr);
result = memcmp((void *) lcstr, (void *) rcstr, Min(llen, rlen));
if (result == 0)
{
if (llen < rlen)
result = -1;
else if (llen > rlen)
result = 1;
}
pfree(lcstr);
pfree(rcstr);
return result;
}
/*
* ==================
* INDEXING FUNCTIONS
@ -81,6 +117,23 @@ citext_cmp(PG_FUNCTION_ARGS)
PG_RETURN_INT32(result);
}
PG_FUNCTION_INFO_V1(citext_pattern_cmp);
Datum
citext_pattern_cmp(PG_FUNCTION_ARGS)
{
text *left = PG_GETARG_TEXT_PP(0);
text *right = PG_GETARG_TEXT_PP(1);
int32 result;
result = internal_citext_pattern_cmp(left, right, PG_GET_COLLATION());
PG_FREE_IF_COPY(left, 0);
PG_FREE_IF_COPY(right, 1);
PG_RETURN_INT32(result);
}
PG_FUNCTION_INFO_V1(citext_hash);
Datum
@ -234,6 +287,74 @@ citext_ge(PG_FUNCTION_ARGS)
PG_RETURN_BOOL(result);
}
PG_FUNCTION_INFO_V1(citext_pattern_lt);
Datum
citext_pattern_lt(PG_FUNCTION_ARGS)
{
text *left = PG_GETARG_TEXT_PP(0);
text *right = PG_GETARG_TEXT_PP(1);
bool result;
result = internal_citext_pattern_cmp(left, right, PG_GET_COLLATION()) < 0;
PG_FREE_IF_COPY(left, 0);
PG_FREE_IF_COPY(right, 1);
PG_RETURN_BOOL(result);
}
PG_FUNCTION_INFO_V1(citext_pattern_le);
Datum
citext_pattern_le(PG_FUNCTION_ARGS)
{
text *left = PG_GETARG_TEXT_PP(0);
text *right = PG_GETARG_TEXT_PP(1);
bool result;
result = internal_citext_pattern_cmp(left, right, PG_GET_COLLATION()) <= 0;
PG_FREE_IF_COPY(left, 0);
PG_FREE_IF_COPY(right, 1);
PG_RETURN_BOOL(result);
}
PG_FUNCTION_INFO_V1(citext_pattern_gt);
Datum
citext_pattern_gt(PG_FUNCTION_ARGS)
{
text *left = PG_GETARG_TEXT_PP(0);
text *right = PG_GETARG_TEXT_PP(1);
bool result;
result = internal_citext_pattern_cmp(left, right, PG_GET_COLLATION()) > 0;
PG_FREE_IF_COPY(left, 0);
PG_FREE_IF_COPY(right, 1);
PG_RETURN_BOOL(result);
}
PG_FUNCTION_INFO_V1(citext_pattern_ge);
Datum
citext_pattern_ge(PG_FUNCTION_ARGS)
{
text *left = PG_GETARG_TEXT_PP(0);
text *right = PG_GETARG_TEXT_PP(1);
bool result;
result = internal_citext_pattern_cmp(left, right, PG_GET_COLLATION()) >= 0;
PG_FREE_IF_COPY(left, 0);
PG_FREE_IF_COPY(right, 1);
PG_RETURN_BOOL(result);
}
/*
* ===================
* AGGREGATE FUNCTIONS

370
contrib/citext/expected/citext.out
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@ -2351,3 +2351,373 @@ SELECT * FROM citext_matview ORDER BY id;
5 |
(5 rows)
-- test citext_pattern_cmp() function explicitly.
SELECT citext_pattern_cmp('aardvark'::citext, 'aardvark'::citext) AS zero;
zero
------
0
(1 row)
SELECT citext_pattern_cmp('aardvark'::citext, 'aardVark'::citext) AS zero;
zero
------
0
(1 row)
SELECT citext_pattern_cmp('AARDVARK'::citext, 'AARDVARK'::citext) AS zero;
zero
------
0
(1 row)
SELECT citext_pattern_cmp('B'::citext, 'a'::citext) > 0 AS true;
true
------
t
(1 row)
SELECT citext_pattern_cmp('a'::citext, 'B'::citext) < 0 AS true;
true
------
t
(1 row)
SELECT citext_pattern_cmp('A'::citext, 'b'::citext) < 0 AS true;
true
------
t
(1 row)
SELECT citext_pattern_cmp('ABCD'::citext, 'abc'::citext) > 0 AS true;
true
------
t
(1 row)
SELECT citext_pattern_cmp('ABC'::citext, 'abcd'::citext) < 0 AS true;
true
------
t
(1 row)
-- test operator functions
-- lt
SELECT citext_pattern_lt('a'::citext, 'b'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_lt('A'::citext, 'b'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_lt('a'::citext, 'B'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_lt('b'::citext, 'a'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_lt('B'::citext, 'a'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_lt('b'::citext, 'A'::citext) AS false;
false
-------
f
(1 row)
-- le
SELECT citext_pattern_le('a'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('a'::citext, 'A'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('A'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('A'::citext, 'A'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('a'::citext, 'B'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('A'::citext, 'b'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('a'::citext, 'B'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('b'::citext, 'a'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_le('B'::citext, 'a'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_le('b'::citext, 'A'::citext) AS false;
false
-------
f
(1 row)
-- gt
SELECT citext_pattern_gt('a'::citext, 'b'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_gt('A'::citext, 'b'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_gt('a'::citext, 'B'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_gt('b'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_gt('B'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_gt('b'::citext, 'A'::citext) AS true;
true
------
t
(1 row)
-- ge
SELECT citext_pattern_ge('a'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_ge('a'::citext, 'A'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_ge('A'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_ge('A'::citext, 'A'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_ge('a'::citext, 'B'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_ge('A'::citext, 'b'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_ge('a'::citext, 'B'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_ge('b'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_ge('B'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_ge('b'::citext, 'A'::citext) AS true;
true
------
t
(1 row)
-- Test ~<~ and ~<=~
SELECT 'a'::citext ~<~ 'B'::citext AS t;
t
---
t
(1 row)
SELECT 'b'::citext ~<~ 'A'::citext AS f;
f
---
f
(1 row)
SELECT 'à'::citext ~<~ 'À'::citext AS f;
f
---
f
(1 row)
SELECT 'a'::citext ~<=~ 'B'::citext AS t;
t
---
t
(1 row)
SELECT 'a'::citext ~<=~ 'A'::citext AS t;
t
---
t
(1 row)
SELECT 'à'::citext ~<=~ 'À'::citext AS t;
t
---
f
(1 row)
-- Test ~>~ and ~>=~
SELECT 'B'::citext ~>~ 'a'::citext AS t;
t
---
t
(1 row)
SELECT 'b'::citext ~>~ 'A'::citext AS t;
t
---
t
(1 row)
SELECT 'à'::citext ~>~ 'À'::citext AS f;
f
---
t
(1 row)
SELECT 'B'::citext ~>~ 'b'::citext AS f;
f
---
f
(1 row)
SELECT 'B'::citext ~>=~ 'b'::citext AS t;
t
---
t
(1 row)
SELECT 'à'::citext ~>=~ 'À'::citext AS t;
t
---
t
(1 row)
-- Test implicit casting. citext casts to text, but not vice-versa.
SELECT 'B'::citext ~<~ 'a'::text AS t; -- text wins.
t
---
t
(1 row)
SELECT 'B'::citext ~<=~ 'a'::text AS t; -- text wins.
t
---
t
(1 row)
SELECT 'a'::citext ~>~ 'B'::text AS t; -- text wins.
t
---
t
(1 row)
SELECT 'a'::citext ~>=~ 'B'::text AS t; -- text wins.
t
---
t
(1 row)
-- Test implicit casting. citext casts to varchar, but not vice-versa.
SELECT 'B'::citext ~<~ 'a'::varchar AS t; -- varchar wins.
t
---
t
(1 row)
SELECT 'B'::citext ~<=~ 'a'::varchar AS t; -- varchar wins.
t
---
t
(1 row)
SELECT 'a'::citext ~>~ 'B'::varchar AS t; -- varchar wins.
t
---
t
(1 row)
SELECT 'a'::citext ~>=~ 'B'::varchar AS t; -- varchar wins.
t
---
t
(1 row)

370
contrib/citext/expected/citext_1.out
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@ -2351,3 +2351,373 @@ SELECT * FROM citext_matview ORDER BY id;
5 |
(5 rows)
-- test citext_pattern_cmp() function explicitly.
SELECT citext_pattern_cmp('aardvark'::citext, 'aardvark'::citext) AS zero;
zero
------
0
(1 row)
SELECT citext_pattern_cmp('aardvark'::citext, 'aardVark'::citext) AS zero;
zero
------
0
(1 row)
SELECT citext_pattern_cmp('AARDVARK'::citext, 'AARDVARK'::citext) AS zero;
zero
------
0
(1 row)
SELECT citext_pattern_cmp('B'::citext, 'a'::citext) > 0 AS true;
true
------
t
(1 row)
SELECT citext_pattern_cmp('a'::citext, 'B'::citext) < 0 AS true;
true
------
t
(1 row)
SELECT citext_pattern_cmp('A'::citext, 'b'::citext) < 0 AS true;
true
------
t
(1 row)
SELECT citext_pattern_cmp('ABCD'::citext, 'abc'::citext) > 0 AS true;
true
------
t
(1 row)
SELECT citext_pattern_cmp('ABC'::citext, 'abcd'::citext) < 0 AS true;
true
------
t
(1 row)
-- test operator functions
-- lt
SELECT citext_pattern_lt('a'::citext, 'b'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_lt('A'::citext, 'b'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_lt('a'::citext, 'B'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_lt('b'::citext, 'a'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_lt('B'::citext, 'a'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_lt('b'::citext, 'A'::citext) AS false;
false
-------
f
(1 row)
-- le
SELECT citext_pattern_le('a'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('a'::citext, 'A'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('A'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('A'::citext, 'A'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('a'::citext, 'B'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('A'::citext, 'b'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('a'::citext, 'B'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_le('b'::citext, 'a'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_le('B'::citext, 'a'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_le('b'::citext, 'A'::citext) AS false;
false
-------
f
(1 row)
-- gt
SELECT citext_pattern_gt('a'::citext, 'b'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_gt('A'::citext, 'b'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_gt('a'::citext, 'B'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_gt('b'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_gt('B'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_gt('b'::citext, 'A'::citext) AS true;
true
------
t
(1 row)
-- ge
SELECT citext_pattern_ge('a'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_ge('a'::citext, 'A'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_ge('A'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_ge('A'::citext, 'A'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_ge('a'::citext, 'B'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_ge('A'::citext, 'b'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_ge('a'::citext, 'B'::citext) AS false;
false
-------
f
(1 row)
SELECT citext_pattern_ge('b'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_ge('B'::citext, 'a'::citext) AS true;
true
------
t
(1 row)
SELECT citext_pattern_ge('b'::citext, 'A'::citext) AS true;
true
------
t
(1 row)
-- Test ~<~ and ~<=~
SELECT 'a'::citext ~<~ 'B'::citext AS t;
t
---
t
(1 row)
SELECT 'b'::citext ~<~ 'A'::citext AS f;
f
---
f
(1 row)
SELECT 'à'::citext ~<~ 'À'::citext AS f;
f
---
f
(1 row)
SELECT 'a'::citext ~<=~ 'B'::citext AS t;
t
---
t
(1 row)
SELECT 'a'::citext ~<=~ 'A'::citext AS t;
t
---
t
(1 row)
SELECT 'à'::citext ~<=~ 'À'::citext AS t;
t
---
t
(1 row)
-- Test ~>~ and ~>=~
SELECT 'B'::citext ~>~ 'a'::citext AS t;
t
---
t
(1 row)
SELECT 'b'::citext ~>~ 'A'::citext AS t;
t
---
t
(1 row)
SELECT 'à'::citext ~>~ 'À'::citext AS f;
f
---
f
(1 row)
SELECT 'B'::citext ~>~ 'b'::citext AS f;
f
---
f
(1 row)
SELECT 'B'::citext ~>=~ 'b'::citext AS t;
t
---
t
(1 row)
SELECT 'à'::citext ~>=~ 'À'::citext AS t;
t
---
t
(1 row)
-- Test implicit casting. citext casts to text, but not vice-versa.
SELECT 'B'::citext ~<~ 'a'::text AS t; -- text wins.
t
---
t
(1 row)
SELECT 'B'::citext ~<=~ 'a'::text AS t; -- text wins.
t
---
t
(1 row)
SELECT 'a'::citext ~>~ 'B'::text AS t; -- text wins.
t
---
t
(1 row)
SELECT 'a'::citext ~>=~ 'B'::text AS t; -- text wins.
t
---
t
(1 row)
-- Test implicit casting. citext casts to varchar, but not vice-versa.
SELECT 'B'::citext ~<~ 'a'::varchar AS t; -- varchar wins.
t
---
t
(1 row)
SELECT 'B'::citext ~<=~ 'a'::varchar AS t; -- varchar wins.
t
---
t
(1 row)
SELECT 'a'::citext ~>~ 'B'::varchar AS t; -- varchar wins.
t
---
t
(1 row)
SELECT 'a'::citext ~>=~ 'B'::varchar AS t; -- varchar wins.
t
---
t
(1 row)

78
contrib/citext/sql/citext.sql
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@ -752,3 +752,81 @@ SELECT *
WHERE t.id IS NULL OR m.id IS NULL;
REFRESH MATERIALIZED VIEW CONCURRENTLY citext_matview;
SELECT * FROM citext_matview ORDER BY id;
-- test citext_pattern_cmp() function explicitly.
SELECT citext_pattern_cmp('aardvark'::citext, 'aardvark'::citext) AS zero;
SELECT citext_pattern_cmp('aardvark'::citext, 'aardVark'::citext) AS zero;
SELECT citext_pattern_cmp('AARDVARK'::citext, 'AARDVARK'::citext) AS zero;
SELECT citext_pattern_cmp('B'::citext, 'a'::citext) > 0 AS true;
SELECT citext_pattern_cmp('a'::citext, 'B'::citext) < 0 AS true;
SELECT citext_pattern_cmp('A'::citext, 'b'::citext) < 0 AS true;
SELECT citext_pattern_cmp('ABCD'::citext, 'abc'::citext) > 0 AS true;
SELECT citext_pattern_cmp('ABC'::citext, 'abcd'::citext) < 0 AS true;
-- test operator functions
-- lt
SELECT citext_pattern_lt('a'::citext, 'b'::citext) AS true;
SELECT citext_pattern_lt('A'::citext, 'b'::citext) AS true;
SELECT citext_pattern_lt('a'::citext, 'B'::citext) AS true;
SELECT citext_pattern_lt('b'::citext, 'a'::citext) AS false;
SELECT citext_pattern_lt('B'::citext, 'a'::citext) AS false;
SELECT citext_pattern_lt('b'::citext, 'A'::citext) AS false;
-- le
SELECT citext_pattern_le('a'::citext, 'a'::citext) AS true;
SELECT citext_pattern_le('a'::citext, 'A'::citext) AS true;
SELECT citext_pattern_le('A'::citext, 'a'::citext) AS true;
SELECT citext_pattern_le('A'::citext, 'A'::citext) AS true;
SELECT citext_pattern_le('a'::citext, 'B'::citext) AS true;
SELECT citext_pattern_le('A'::citext, 'b'::citext) AS true;
SELECT citext_pattern_le('a'::citext, 'B'::citext) AS true;
SELECT citext_pattern_le('b'::citext, 'a'::citext) AS false;
SELECT citext_pattern_le('B'::citext, 'a'::citext) AS false;
SELECT citext_pattern_le('b'::citext, 'A'::citext) AS false;
-- gt
SELECT citext_pattern_gt('a'::citext, 'b'::citext) AS false;
SELECT citext_pattern_gt('A'::citext, 'b'::citext) AS false;
SELECT citext_pattern_gt('a'::citext, 'B'::citext) AS false;
SELECT citext_pattern_gt('b'::citext, 'a'::citext) AS true;
SELECT citext_pattern_gt('B'::citext, 'a'::citext) AS true;
SELECT citext_pattern_gt('b'::citext, 'A'::citext) AS true;
-- ge
SELECT citext_pattern_ge('a'::citext, 'a'::citext) AS true;
SELECT citext_pattern_ge('a'::citext, 'A'::citext) AS true;
SELECT citext_pattern_ge('A'::citext, 'a'::citext) AS true;
SELECT citext_pattern_ge('A'::citext, 'A'::citext) AS true;
SELECT citext_pattern_ge('a'::citext, 'B'::citext) AS false;
SELECT citext_pattern_ge('A'::citext, 'b'::citext) AS false;
SELECT citext_pattern_ge('a'::citext, 'B'::citext) AS false;
SELECT citext_pattern_ge('b'::citext, 'a'::citext) AS true;
SELECT citext_pattern_ge('B'::citext, 'a'::citext) AS true;
SELECT citext_pattern_ge('b'::citext, 'A'::citext) AS true;
-- Test ~<~ and ~<=~
SELECT 'a'::citext ~<~ 'B'::citext AS t;
SELECT 'b'::citext ~<~ 'A'::citext AS f;
SELECT 'à'::citext ~<~ 'À'::citext AS f;
SELECT 'a'::citext ~<=~ 'B'::citext AS t;
SELECT 'a'::citext ~<=~ 'A'::citext AS t;
SELECT 'à'::citext ~<=~ 'À'::citext AS t;
-- Test ~>~ and ~>=~
SELECT 'B'::citext ~>~ 'a'::citext AS t;
SELECT 'b'::citext ~>~ 'A'::citext AS t;
SELECT 'à'::citext ~>~ 'À'::citext AS f;
SELECT 'B'::citext ~>~ 'b'::citext AS f;
SELECT 'B'::citext ~>=~ 'b'::citext AS t;
SELECT 'à'::citext ~>=~ 'À'::citext AS t;
-- Test implicit casting. citext casts to text, but not vice-versa.
SELECT 'B'::citext ~<~ 'a'::text AS t; -- text wins.
SELECT 'B'::citext ~<=~ 'a'::text AS t; -- text wins.
SELECT 'a'::citext ~>~ 'B'::text AS t; -- text wins.
SELECT 'a'::citext ~>=~ 'B'::text AS t; -- text wins.
-- Test implicit casting. citext casts to varchar, but not vice-versa.
SELECT 'B'::citext ~<~ 'a'::varchar AS t; -- varchar wins.
SELECT 'B'::citext ~<=~ 'a'::varchar AS t; -- varchar wins.
SELECT 'a'::citext ~>~ 'B'::varchar AS t; -- varchar wins.
SELECT 'a'::citext ~>=~ 'B'::varchar AS t; -- varchar wins.

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