735 lines
16 KiB
Plaintext
735 lines
16 KiB
Plaintext
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/*
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* This test is for Linux/glibc systems and assumes that a full set of
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* locales is installed. It must be run in a UTF-8 locale.
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*/
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SET client_encoding TO UTF8;
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CREATE TABLE collate_test1 (
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a int,
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b text COLLATE "en_US.utf8" NOT NULL
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);
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\d collate_test1
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Table "public.collate_test1"
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Column | Type | Modifiers
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--------+---------+-----------------------------
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a | integer |
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b | text | collate en_US.utf8 not null
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CREATE TABLE collate_test_fail (
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a int,
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b text COLLATE "ja_JP.eucjp"
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);
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ERROR: collation "ja_JP.eucjp" for current database encoding "UTF8" does not exist
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LINE 3: b text COLLATE "ja_JP.eucjp"
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^
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CREATE TABLE collate_test_fail (
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a int,
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b text COLLATE "foo"
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);
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ERROR: collation "foo" for current database encoding "UTF8" does not exist
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LINE 3: b text COLLATE "foo"
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^
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CREATE TABLE collate_test_fail (
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a int COLLATE "en_US.utf8",
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b text
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);
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ERROR: collations are not supported by type integer
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LINE 2: a int COLLATE "en_US.utf8",
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^
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CREATE TABLE collate_test_like (
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LIKE collate_test1
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);
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\d collate_test_like
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Table "public.collate_test_like"
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Column | Type | Modifiers
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--------+---------+-----------------------------
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a | integer |
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b | text | collate en_US.utf8 not null
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CREATE TABLE collate_test2 (
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a int,
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b text COLLATE "sv_SE.utf8"
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);
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CREATE TABLE collate_test3 (
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a int,
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b text COLLATE "C"
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);
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INSERT INTO collate_test1 VALUES (1, 'abc'), (2, 'äbc'), (3, 'bbc'), (4, 'ABC');
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INSERT INTO collate_test2 SELECT * FROM collate_test1;
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INSERT INTO collate_test3 SELECT * FROM collate_test1;
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SELECT * FROM collate_test1 WHERE b >= 'bbc';
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a | b
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---+-----
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3 | bbc
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(1 row)
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SELECT * FROM collate_test2 WHERE b >= 'bbc';
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a | b
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---+-----
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2 | äbc
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3 | bbc
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(2 rows)
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SELECT * FROM collate_test3 WHERE b >= 'bbc';
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a | b
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---+-----
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2 | äbc
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3 | bbc
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(2 rows)
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SELECT * FROM collate_test3 WHERE b >= 'BBC';
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a | b
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---+-----
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1 | abc
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2 | äbc
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3 | bbc
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(3 rows)
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SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'bbc';
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a | b
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---+-----
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2 | äbc
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3 | bbc
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(2 rows)
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SELECT * FROM collate_test1 WHERE b >= 'bbc' COLLATE "C";
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a | b
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---+-----
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2 | äbc
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3 | bbc
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(2 rows)
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SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'bbc' COLLATE "C";
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a | b
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---+-----
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2 | äbc
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3 | bbc
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(2 rows)
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SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'bbc' COLLATE "en_US.utf8";
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ERROR: collation mismatch between explicit collations "C" and "en_US.utf8"
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LINE 1: ...* FROM collate_test1 WHERE b COLLATE "C" >= 'bbc' COLLATE "e...
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^
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SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'bbc' COLLATE "en_US";
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ERROR: collation mismatch between explicit collations "C" and "en_US"
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LINE 1: ...* FROM collate_test1 WHERE b COLLATE "C" >= 'bbc' COLLATE "e...
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^
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CREATE DOMAIN testdomain_sv AS text COLLATE "sv_SE.utf8";
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CREATE DOMAIN testdomain_i AS int COLLATE "sv_SE.utf8"; -- fails
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ERROR: collations are not supported by type integer
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CREATE TABLE collate_test4 (
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a int,
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b testdomain_sv
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);
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INSERT INTO collate_test4 SELECT * FROM collate_test1;
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SELECT a, b FROM collate_test4 ORDER BY b;
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a | b
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---+-----
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1 | abc
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4 | ABC
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3 | bbc
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2 | äbc
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(4 rows)
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CREATE TABLE collate_test5 (
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a int,
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b testdomain_sv COLLATE "en_US.utf8"
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);
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INSERT INTO collate_test5 SELECT * FROM collate_test1;
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SELECT a, b FROM collate_test5 ORDER BY b;
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a | b
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---+-----
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1 | abc
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4 | ABC
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2 | äbc
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3 | bbc
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(4 rows)
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SELECT a, b FROM collate_test1 ORDER BY b;
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a | b
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---+-----
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1 | abc
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4 | ABC
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2 | äbc
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3 | bbc
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(4 rows)
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SELECT a, b FROM collate_test2 ORDER BY b;
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a | b
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---+-----
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1 | abc
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4 | ABC
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3 | bbc
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2 | äbc
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(4 rows)
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SELECT a, b FROM collate_test3 ORDER BY b;
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a | b
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---+-----
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4 | ABC
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1 | abc
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3 | bbc
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2 | äbc
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(4 rows)
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SELECT a, b FROM collate_test1 ORDER BY b COLLATE "C";
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a | b
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---+-----
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4 | ABC
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1 | abc
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3 | bbc
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2 | äbc
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(4 rows)
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-- star expansion
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SELECT * FROM collate_test1 ORDER BY b;
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a | b
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---+-----
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1 | abc
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4 | ABC
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2 | äbc
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3 | bbc
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(4 rows)
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SELECT * FROM collate_test2 ORDER BY b;
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a | b
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---+-----
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1 | abc
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4 | ABC
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3 | bbc
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2 | äbc
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(4 rows)
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SELECT * FROM collate_test3 ORDER BY b;
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a | b
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---+-----
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4 | ABC
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1 | abc
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3 | bbc
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2 | äbc
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(4 rows)
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-- constant expression folding
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SELECT 'bbc' COLLATE "en_US.utf8" > 'äbc' COLLATE "en_US.utf8" AS "true";
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true
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------
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t
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(1 row)
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SELECT 'bbc' COLLATE "sv_SE.utf8" > 'äbc' COLLATE "sv_SE.utf8" AS "false";
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false
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-------
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f
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(1 row)
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-- upper/lower
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CREATE TABLE collate_test10 (
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a int,
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x text COLLATE "en_US.utf8",
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y text COLLATE "tr_TR.utf8"
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);
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INSERT INTO collate_test10 VALUES (1, 'hij', 'hij'), (2, 'HIJ', 'HIJ');
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SELECT a, lower(x), lower(y), upper(x), upper(y), initcap(x), initcap(y) FROM collate_test10;
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a | lower | lower | upper | upper | initcap | initcap
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---+-------+-------+-------+-------+---------+---------
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1 | hij | hij | HIJ | HİJ | Hij | Hij
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2 | hij | hıj | HIJ | HIJ | Hij | Hıj
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(2 rows)
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SELECT a, lower(x COLLATE "C"), lower(y COLLATE "C") FROM collate_test10;
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a | lower | lower
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---+-------+-------
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1 | hij | hij
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2 | hij | hij
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(2 rows)
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SELECT a, x, y FROM collate_test10 ORDER BY lower(y), a;
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a | x | y
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---+-----+-----
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2 | HIJ | HIJ
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1 | hij | hij
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(2 rows)
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-- LIKE/ILIKE
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SELECT * FROM collate_test1 WHERE b LIKE 'abc';
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a | b
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---+-----
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1 | abc
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(1 row)
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SELECT * FROM collate_test1 WHERE b LIKE 'abc%';
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a | b
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---+-----
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1 | abc
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(1 row)
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SELECT * FROM collate_test1 WHERE b LIKE '%bc%';
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a | b
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---+-----
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1 | abc
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2 | äbc
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3 | bbc
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(3 rows)
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SELECT * FROM collate_test1 WHERE b ILIKE 'abc';
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a | b
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---+-----
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1 | abc
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4 | ABC
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(2 rows)
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SELECT * FROM collate_test1 WHERE b ILIKE 'abc%';
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a | b
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---+-----
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1 | abc
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4 | ABC
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(2 rows)
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SELECT * FROM collate_test1 WHERE b ILIKE '%bc%';
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a | b
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---+-----
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1 | abc
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2 | äbc
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3 | bbc
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4 | ABC
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(4 rows)
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SELECT 'Türkiye' COLLATE "en_US.utf8" ILIKE '%KI%' AS "true";
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true
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------
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t
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(1 row)
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SELECT 'Türkiye' COLLATE "tr_TR.utf8" ILIKE '%KI%' AS "false";
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false
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-------
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f
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(1 row)
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-- The following actually exercises the selectivity estimation for ILIKE.
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SELECT relname FROM pg_class WHERE relname ILIKE 'abc%';
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relname
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---------
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(0 rows)
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-- to_char
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SET lc_time TO 'tr_TR.utf8';
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SELECT to_char(date '2010-04-01', 'DD TMMON YYYY');
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to_char
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-------------
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01 NIS 2010
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(1 row)
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SELECT to_char(date '2010-04-01', 'DD TMMON YYYY' COLLATE "tr_TR.utf8");
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to_char
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-------------
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01 NİS 2010
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(1 row)
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-- backwards parsing
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CREATE VIEW collview1 AS SELECT * FROM collate_test1 WHERE b COLLATE "C" >= 'bbc';
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CREATE VIEW collview2 AS SELECT a, b FROM collate_test1 ORDER BY b COLLATE "C";
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CREATE VIEW collview3 AS SELECT a, lower((x || x) COLLATE "C") FROM collate_test10;
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SELECT table_name, view_definition FROM information_schema.views
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WHERE table_name LIKE 'collview%' ORDER BY 1;
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table_name | view_definition
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------------+--------------------------------------------------------------------------------------------------------------------
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collview1 | SELECT collate_test1.a, collate_test1.b FROM collate_test1 WHERE ((collate_test1.b COLLATE "C") >= 'bbc'::text);
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collview2 | SELECT collate_test1.a, collate_test1.b FROM collate_test1 ORDER BY (collate_test1.b COLLATE "C");
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collview3 | SELECT collate_test10.a, lower(((collate_test10.x || collate_test10.x) COLLATE "C")) AS lower FROM collate_test10;
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(3 rows)
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-- collation propagation in various expression type
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SELECT a, coalesce(b, 'foo') FROM collate_test1 ORDER BY 2;
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a | coalesce
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---+----------
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1 | abc
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4 | ABC
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2 | äbc
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3 | bbc
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(4 rows)
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SELECT a, coalesce(b, 'foo') FROM collate_test2 ORDER BY 2;
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a | coalesce
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---+----------
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1 | abc
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4 | ABC
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3 | bbc
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2 | äbc
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(4 rows)
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SELECT a, coalesce(b, 'foo') FROM collate_test3 ORDER BY 2;
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a | coalesce
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---+----------
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4 | ABC
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1 | abc
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3 | bbc
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2 | äbc
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(4 rows)
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SELECT a, lower(coalesce(x, 'foo')), lower(coalesce(y, 'foo')) FROM collate_test10;
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a | lower | lower
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---+-------+-------
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1 | hij | hij
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2 | hij | hıj
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(2 rows)
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|
|
|||
|
|
SELECT a, b, greatest(b, 'CCC') FROM collate_test1 ORDER BY 3;
|
|||
|
|
a | b | greatest
|
|||
|
|
---+-----+----------
|
|||
|
|
1 | abc | CCC
|
|||
|
|
2 | äbc | CCC
|
|||
|
|
3 | bbc | CCC
|
|||
|
|
4 | ABC | CCC
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, b, greatest(b, 'CCC') FROM collate_test2 ORDER BY 3;
|
|||
|
|
a | b | greatest
|
|||
|
|
---+-----+----------
|
|||
|
|
1 | abc | CCC
|
|||
|
|
3 | bbc | CCC
|
|||
|
|
4 | ABC | CCC
|
|||
|
|
2 | äbc | äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, b, greatest(b, 'CCC') FROM collate_test3 ORDER BY 3;
|
|||
|
|
a | b | greatest
|
|||
|
|
---+-----+----------
|
|||
|
|
4 | ABC | CCC
|
|||
|
|
1 | abc | abc
|
|||
|
|
3 | bbc | bbc
|
|||
|
|
2 | äbc | äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, x, y, lower(greatest(x, 'foo')), lower(greatest(y, 'foo')) FROM collate_test10;
|
|||
|
|
a | x | y | lower | lower
|
|||
|
|
---+-----+-----+-------+-------
|
|||
|
|
1 | hij | hij | hij | hij
|
|||
|
|
2 | HIJ | HIJ | hij | hıj
|
|||
|
|
(2 rows)
|
|||
|
|
|
|||
|
|
SELECT a, nullif(b, 'abc') FROM collate_test1 ORDER BY 2;
|
|||
|
|
a | nullif
|
|||
|
|
---+--------
|
|||
|
|
4 | ABC
|
|||
|
|
2 | äbc
|
|||
|
|
3 | bbc
|
|||
|
|
1 |
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, nullif(b, 'abc') FROM collate_test2 ORDER BY 2;
|
|||
|
|
a | nullif
|
|||
|
|
---+--------
|
|||
|
|
4 | ABC
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
1 |
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, nullif(b, 'abc') FROM collate_test3 ORDER BY 2;
|
|||
|
|
a | nullif
|
|||
|
|
---+--------
|
|||
|
|
4 | ABC
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
1 |
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, lower(nullif(x, 'foo')), lower(nullif(y, 'foo')) FROM collate_test10;
|
|||
|
|
a | lower | lower
|
|||
|
|
---+-------+-------
|
|||
|
|
1 | hij | hij
|
|||
|
|
2 | hij | hıj
|
|||
|
|
(2 rows)
|
|||
|
|
|
|||
|
|
SELECT a, CASE b WHEN 'abc' THEN 'abcd' ELSE b END FROM collate_test1 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+------
|
|||
|
|
4 | ABC
|
|||
|
|
2 | äbc
|
|||
|
|
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 | ABC
|
|||
|
|
1 | abcd
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, CASE b WHEN 'abc' THEN 'abcd' ELSE b END FROM collate_test3 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+------
|
|||
|
|
4 | ABC
|
|||
|
|
1 | abcd
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
CREATE DOMAIN testdomain AS text;
|
|||
|
|
SELECT a, b::testdomain FROM collate_test1 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
1 | abc
|
|||
|
|
4 | ABC
|
|||
|
|
2 | äbc
|
|||
|
|
3 | bbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, b::testdomain FROM collate_test2 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
1 | abc
|
|||
|
|
4 | ABC
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, b::testdomain FROM collate_test3 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
4 | ABC
|
|||
|
|
1 | abc
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, b::testdomain_sv FROM collate_test3 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
1 | abc
|
|||
|
|
4 | ABC
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, lower(x::testdomain), lower(y::testdomain) FROM collate_test10;
|
|||
|
|
a | lower | lower
|
|||
|
|
---+-------+-------
|
|||
|
|
1 | hij | hij
|
|||
|
|
2 | hij | hıj
|
|||
|
|
(2 rows)
|
|||
|
|
|
|||
|
|
SELECT min(b), max(b) FROM collate_test1;
|
|||
|
|
min | max
|
|||
|
|
-----+-----
|
|||
|
|
abc | bbc
|
|||
|
|
(1 row)
|
|||
|
|
|
|||
|
|
SELECT min(b), max(b) FROM collate_test2;
|
|||
|
|
min | max
|
|||
|
|
-----+-----
|
|||
|
|
abc | äbc
|
|||
|
|
(1 row)
|
|||
|
|
|
|||
|
|
SELECT min(b), max(b) FROM collate_test3;
|
|||
|
|
min | max
|
|||
|
|
-----+-----
|
|||
|
|
ABC | äbc
|
|||
|
|
(1 row)
|
|||
|
|
|
|||
|
|
SELECT array_agg(b ORDER BY b) FROM collate_test1;
|
|||
|
|
array_agg
|
|||
|
|
-------------------
|
|||
|
|
{abc,ABC,äbc,bbc}
|
|||
|
|
(1 row)
|
|||
|
|
|
|||
|
|
SELECT array_agg(b ORDER BY b) FROM collate_test2;
|
|||
|
|
array_agg
|
|||
|
|
-------------------
|
|||
|
|
{abc,ABC,bbc,äbc}
|
|||
|
|
(1 row)
|
|||
|
|
|
|||
|
|
SELECT array_agg(b ORDER BY b) FROM collate_test3;
|
|||
|
|
array_agg
|
|||
|
|
-------------------
|
|||
|
|
{ABC,abc,bbc,äbc}
|
|||
|
|
(1 row)
|
|||
|
|
|
|||
|
|
SELECT a, b FROM collate_test1 UNION ALL SELECT a, b FROM collate_test1 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
1 | abc
|
|||
|
|
1 | abc
|
|||
|
|
4 | ABC
|
|||
|
|
4 | ABC
|
|||
|
|
2 | äbc
|
|||
|
|
2 | äbc
|
|||
|
|
3 | bbc
|
|||
|
|
3 | bbc
|
|||
|
|
(8 rows)
|
|||
|
|
|
|||
|
|
SELECT a, b FROM collate_test2 UNION SELECT a, b FROM collate_test2 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
1 | abc
|
|||
|
|
4 | ABC
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, b FROM collate_test3 WHERE a < 4 INTERSECT SELECT a, b FROM collate_test3 WHERE a > 1 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
(2 rows)
|
|||
|
|
|
|||
|
|
SELECT a, b FROM collate_test3 EXCEPT SELECT a, b FROM collate_test3 WHERE a < 2 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
4 | ABC
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
(3 rows)
|
|||
|
|
|
|||
|
|
SELECT a, b FROM collate_test1 UNION ALL SELECT a, b FROM collate_test3 ORDER BY 2; -- fail
|
|||
|
|
ERROR: no collation was derived for the sort expression
|
|||
|
|
LINE 1: ...e_test1 UNION ALL SELECT a, b FROM collate_test3 ORDER BY 2;
|
|||
|
|
^
|
|||
|
|
HINT: Use the COLLATE clause to set the collation explicitly.
|
|||
|
|
SELECT a, b FROM collate_test1 UNION ALL SELECT a, b FROM collate_test3; -- ok
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
1 | abc
|
|||
|
|
2 | äbc
|
|||
|
|
3 | bbc
|
|||
|
|
4 | ABC
|
|||
|
|
1 | abc
|
|||
|
|
2 | äbc
|
|||
|
|
3 | bbc
|
|||
|
|
4 | ABC
|
|||
|
|
(8 rows)
|
|||
|
|
|
|||
|
|
SELECT a, b FROM collate_test1 UNION SELECT a, b FROM collate_test3 ORDER BY 2; -- fail
|
|||
|
|
ERROR: collation mismatch between implicit collations "en_US.utf8" and "C"
|
|||
|
|
LINE 1: SELECT a, b FROM collate_test1 UNION SELECT a, b FROM collat...
|
|||
|
|
^
|
|||
|
|
HINT: You can override 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_test3 ORDER BY 2; -- ok
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
4 | ABC
|
|||
|
|
1 | abc
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, b FROM collate_test1 INTERSECT SELECT a, b FROM collate_test3 ORDER BY 2; -- fail
|
|||
|
|
ERROR: collation mismatch between implicit collations "en_US.utf8" and "C"
|
|||
|
|
LINE 1: ...ELECT a, b FROM collate_test1 INTERSECT SELECT a, b FROM col...
|
|||
|
|
^
|
|||
|
|
HINT: You can override the collation by applying the COLLATE clause to one or both expressions.
|
|||
|
|
SELECT a, b FROM collate_test1 EXCEPT SELECT a, b FROM collate_test3 ORDER BY 2; -- fail
|
|||
|
|
ERROR: collation mismatch between implicit collations "en_US.utf8" and "C"
|
|||
|
|
LINE 1: SELECT a, b FROM collate_test1 EXCEPT SELECT a, b FROM colla...
|
|||
|
|
^
|
|||
|
|
HINT: You can override the collation by applying the COLLATE clause to one or both expressions.
|
|||
|
|
-- casting
|
|||
|
|
SELECT CAST('42' AS text COLLATE "C");
|
|||
|
|
ERROR: COLLATE clause not allowed in cast target
|
|||
|
|
LINE 1: SELECT CAST('42' AS text COLLATE "C");
|
|||
|
|
^
|
|||
|
|
SELECT a, CAST(b AS varchar) FROM collate_test1 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
1 | abc
|
|||
|
|
4 | ABC
|
|||
|
|
2 | äbc
|
|||
|
|
3 | bbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, CAST(b AS varchar) FROM collate_test2 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
1 | abc
|
|||
|
|
4 | ABC
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, CAST(b AS varchar) FROM collate_test3 ORDER BY 2;
|
|||
|
|
a | b
|
|||
|
|
---+-----
|
|||
|
|
4 | ABC
|
|||
|
|
1 | abc
|
|||
|
|
3 | bbc
|
|||
|
|
2 | äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
-- polymorphism
|
|||
|
|
SELECT * FROM unnest((SELECT array_agg(b ORDER BY b) FROM collate_test1)) ORDER BY 1;
|
|||
|
|
unnest
|
|||
|
|
--------
|
|||
|
|
abc
|
|||
|
|
ABC
|
|||
|
|
äbc
|
|||
|
|
bbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT * FROM unnest((SELECT array_agg(b ORDER BY b) FROM collate_test2)) ORDER BY 1;
|
|||
|
|
unnest
|
|||
|
|
--------
|
|||
|
|
abc
|
|||
|
|
ABC
|
|||
|
|
bbc
|
|||
|
|
äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT * FROM unnest((SELECT array_agg(b ORDER BY b) FROM collate_test3)) ORDER BY 1;
|
|||
|
|
unnest
|
|||
|
|
--------
|
|||
|
|
ABC
|
|||
|
|
abc
|
|||
|
|
bbc
|
|||
|
|
äbc
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
CREATE FUNCTION dup (f1 anyelement, f2 out anyelement, f3 out anyarray)
|
|||
|
|
AS 'select $1, array[$1,$1]' LANGUAGE sql;
|
|||
|
|
SELECT a, (dup(b)).* FROM collate_test1 ORDER BY 2;
|
|||
|
|
a | f2 | f3
|
|||
|
|
---+-----+-----------
|
|||
|
|
1 | abc | {abc,abc}
|
|||
|
|
4 | ABC | {ABC,ABC}
|
|||
|
|
2 | äbc | {äbc,äbc}
|
|||
|
|
3 | bbc | {bbc,bbc}
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, (dup(b)).* FROM collate_test2 ORDER BY 2;
|
|||
|
|
a | f2 | f3
|
|||
|
|
---+-----+-----------
|
|||
|
|
1 | abc | {abc,abc}
|
|||
|
|
4 | ABC | {ABC,ABC}
|
|||
|
|
3 | bbc | {bbc,bbc}
|
|||
|
|
2 | äbc | {äbc,äbc}
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
SELECT a, (dup(b)).* FROM collate_test3 ORDER BY 2;
|
|||
|
|
a | f2 | f3
|
|||
|
|
---+-----+-----------
|
|||
|
|
4 | ABC | {ABC,ABC}
|
|||
|
|
1 | abc | {abc,abc}
|
|||
|
|
3 | bbc | {bbc,bbc}
|
|||
|
|
2 | äbc | {äbc,äbc}
|
|||
|
|
(4 rows)
|
|||
|
|
|
|||
|
|
-- indexes
|
|||
|
|
CREATE INDEX collate_test1_idx1 ON collate_test1 (b);
|
|||
|
|
CREATE INDEX collate_test1_idx2 ON collate_test1 (b COLLATE "C");
|
|||
|
|
CREATE INDEX collate_test1_idx3 ON collate_test1 ((b COLLATE "C")); -- this is different grammatically
|
|||
|
|
CREATE INDEX collate_test1_idx4 ON collate_test1 (a COLLATE "C"); -- fail
|
|||
|
|
ERROR: collations are not supported by type integer
|
|||
|
|
CREATE INDEX collate_test1_idx5 ON collate_test1 ((a COLLATE "C")); -- fail
|
|||
|
|
ERROR: collations are not supported by type integer
|
|||
|
|
SELECT relname, pg_get_indexdef(oid) FROM pg_class WHERE relname LIKE 'collate_test%_idx%';
|
|||
|
|
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 "C")
|
|||
|
|
collate_test1_idx3 | CREATE INDEX collate_test1_idx3 ON collate_test1 USING btree (((b COLLATE "C")) COLLATE "C")
|
|||
|
|
(3 rows)
|
|||
|
|
|