95 lines
3.3 KiB
Plaintext
95 lines
3.3 KiB
Plaintext
show variables like 'character_sets_dir%';
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Variable_name Value
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character_sets_dir MYSQL_TEST_DIR/std_data/
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set names utf8;
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select * from information_schema.collations where id>256 order by id;
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COLLATION_NAME CHARACTER_SET_NAME ID IS_DEFAULT IS_COMPILED SORTLEN
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utf8mb4_test_ci utf8mb4 326 8
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utf16_test_ci utf16 327 8
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utf8mb4_test_400_ci utf8mb4 328 8
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utf8_bengali_standard_ci utf8 336 8
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utf8_bengali_traditional_ci utf8 337 8
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utf8_phone_ci utf8 352 8
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utf8_test_ci utf8 353 8
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utf8_5624_1 utf8 354 8
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utf8_5624_2 utf8 355 8
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utf8_5624_3 utf8 356 8
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utf8_5624_4 utf8 357 8
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ucs2_test_ci ucs2 358 8
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ucs2_vn_ci ucs2 359 8
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ucs2_5624_1 ucs2 360 8
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utf8_5624_5 utf8 368 8
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utf32_test_ci utf32 391 8
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utf8_maxuserid_ci utf8 2047 8
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show collation like '%test%';
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Collation Charset Id Default Compiled Sortlen
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latin1_test latin1 99 Yes 1
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utf8_test_ci utf8 353 8
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ucs2_test_ci ucs2 358 8
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utf8mb4_test_ci utf8mb4 326 8
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utf8mb4_test_400_ci utf8mb4 328 8
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utf16_test_ci utf16 327 8
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utf32_test_ci utf32 391 8
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show collation like 'ucs2_vn_ci';
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Collation Charset Id Default Compiled Sortlen
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ucs2_vn_ci ucs2 359 8
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create table 2byte_collation (c1 char(1) character set ucs2 collate ucs2_vn_ci)
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engine = InnoDB;
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insert into 2byte_collation values (0x0061);
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set @@character_set_results=NULL;
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select * from 2byte_collation;
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Catalog Database Table Table_alias Column Column_alias Type Length Max length Is_null Flags Decimals Charsetnr
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def test 2byte_collation 2byte_collation c1 c1 254 2 2 Y 0 0 359
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c1
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a
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drop table 2byte_collation;
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CREATE TABLE 2byte_collation (s1 char(10) character set utf8 collate utf8_maxuserid_ci) engine = innodb;
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INSERT INTO 2byte_collation VALUES ('a'),('b');
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SELECT * FROM 2byte_collation WHERE s1='a' ORDER BY BINARY s1;
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s1
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a
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b
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DROP TABLE 2byte_collation;
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SET @innodb_change_buffering_debug_orig = @@innodb_change_buffering_debug;
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SET GLOBAL innodb_change_buffering_debug = 1;
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set names utf8;
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show collation like 'utf8_maxuserid_ci';
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Collation Charset Id Default Compiled Sortlen
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utf8_maxuserid_ci utf8 2047 8
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CREATE TABLE 2byte_collation(
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a INT AUTO_INCREMENT PRIMARY KEY,
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b CHAR(100) character set utf8 collate utf8_maxuserid_ci,
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c INT,
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z INT,
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INDEX(b))
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ENGINE=InnoDB STATS_PERSISTENT=0;
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INSERT INTO 2byte_collation VALUES(0,'x',1, 1);
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CREATE UNIQUE INDEX idx3 ON 2byte_collation(c, b);
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INSERT INTO 2byte_collation SELECT 0,b,c+1,z+1 FROM 2byte_collation;
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INSERT INTO 2byte_collation SELECT 0,b,c+10,z+10 FROM 2byte_collation;
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INSERT INTO 2byte_collation SELECT 0,b,c+20,z+20 FROM 2byte_collation;
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INSERT INTO 2byte_collation SELECT 0,b,c+50,z+50 FROM 2byte_collation;
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INSERT INTO 2byte_collation SELECT 0,b,c+100,z+100 FROM 2byte_collation;
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INSERT INTO 2byte_collation SELECT 0,b,c+200,z+200 FROM 2byte_collation;
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INSERT INTO 2byte_collation SELECT 0,b,c+400,z+400 FROM 2byte_collation;
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INSERT INTO 2byte_collation SELECT 0,b,c+800,z+800 FROM 2byte_collation;
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INSERT INTO 2byte_collation SELECT 0,b,c+1600,z+1600 FROM 2byte_collation;
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INSERT INTO 2byte_collation SELECT 0,b,c+4000,z+4000 FROM 2byte_collation;
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CREATE INDEX idx5 ON 2byte_collation(b, c);
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SELECT b FROM 2byte_collation LIMIT 10;
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b
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x
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x
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x
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x
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x
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x
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x
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x
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x
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x
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INSERT INTO 2byte_collation VALUES (10001, "a", 20001, 20001);
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UPDATE 2byte_collation set b = "aaa" where c = 20001;
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DROP TABLE 2byte_collation;
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SET GLOBAL innodb_change_buffering_debug = 0;
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