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drop table if exists t1;
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In the following tests we change the order of letter "b"
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making it equal to letter "a", and check that it works
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with all Unicode character sets
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show variables like 'character_sets_dir%';
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character_sets_dir MYSQL_TEST_DIR/std_data/
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show collation like 'utf8_test_ci';
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Collation Charset Id Default Compiled Sortlen
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utf8_test_ci utf8 253 8
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create table t1 (c1 char(1) character set utf8 collate utf8_test_ci);
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insert into t1 values ('a');
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select * from t1 where c1='b';
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show collation like 'ucs2_test_ci';
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Collation Charset Id Default Compiled Sortlen
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ucs2_test_ci ucs2 158 8
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create table t1 (c1 char(1) character set ucs2 collate ucs2_test_ci);
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insert into t1 values ('a');
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select * from t1 where c1='b';
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show collation like 'utf16_test_ci';
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Collation Charset Id Default Compiled Sortlen
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utf16_test_ci utf16 127 8
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create table t1 (c1 char(1) character set utf16 collate utf16_test_ci);
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insert into t1 values ('a');
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select * from t1 where c1='b';
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show collation like 'utf32_test_ci';
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Collation Charset Id Default Compiled Sortlen
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utf32_test_ci utf32 191 8
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create table t1 (c1 char(1) character set utf32 collate utf32_test_ci);
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insert into t1 values ('a');
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select * from t1 where c1='b';
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Vietnamese experimental collation
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show collation like 'ucs2_vn_ci';
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Collation Charset Id Default Compiled Sortlen
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create table t1 (c1 char(1) character set ucs2 collate ucs2_vn_ci);
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insert into t1 values (0x0061),(0x0041),(0x00E0),(0x00C0),(0x1EA3),(0x1EA2),
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(0x00E3),(0x00C3),(0x00E1),(0x00C1),(0x1EA1),(0x1EA0);
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insert into t1 values (0x0103),(0x0102),(0x1EB1),(0x1EB0),(0x1EB3),(0x1EB2),
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(0x1EB5),(0x1EB4),(0x1EAF),(0x1EAE),(0x1EB7),(0x1EB6);
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insert into t1 values (0x00E2),(0x00C2),(0x1EA7),(0x1EA6),(0x1EA9),(0x1EA8),
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(0x1EAB),(0x1EAA),(0x1EA5),(0x1EA4),(0x1EAD),(0x1EAC);
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insert into t1 values ('b'),('B'),('c'),('C');
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insert into t1 values ('d'),('D'),(0x0111),(0x0110);
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insert into t1 values (0x0065),(0x0045),(0x00E8),(0x00C8),(0x1EBB),(0x1EBA),
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(0x1EBD),(0x1EBC),(0x00E9),(0x00C9),(0x1EB9),(0x1EB8);
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insert into t1 values (0x00EA),(0x00CA),(0x1EC1),(0x1EC0),(0x1EC3),(0x1EC2),
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(0x1EC5),(0x1EC4),(0x1EBF),(0x1EBE),(0x1EC7),(0x1EC6);
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insert into t1 values ('g'),('G'),('h'),('H');
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insert into t1 values (0x0069),(0x0049),(0x00EC),(0x00CC),(0x1EC9),(0x1EC8),
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(0x0129),(0x0128),(0x00ED),(0x00CD),(0x1ECB),(0x1ECA);
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insert into t1 values ('k'),('K'),('l'),('L'),('m'),('M');
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insert into t1 values (0x006F),(0x004F),(0x00F2),(0x00D2),(0x1ECF),(0x1ECE),
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(0x00F5),(0x00D5),(0x00F3),(0x00D3),(0x1ECD),(0x1ECC);
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insert into t1 values (0x00F4),(0x00D4),(0x1ED3),(0x1ED2),(0x1ED5),(0x1ED4),
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(0x1ED7),(0x1ED6),(0x1ED1),(0x1ED0),(0x1ED9),(0x1ED8);
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insert into t1 values (0x01A1),(0x01A0),(0x1EDD),(0x1EDC),(0x1EDF),(0x1EDE),
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(0x1EE1),(0x1EE0),(0x1EDB),(0x1EDA),(0x1EE3),(0x1EE2);
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insert into t1 values ('p'),('P'),('q'),('Q'),('r'),('R'),('s'),('S'),('t'),('T');
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insert into t1 values (0x0075),(0x0055),(0x00F9),(0x00D9),(0x1EE7),(0x1EE6),
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(0x0169),(0x0168),(0x00FA),(0x00DA),(0x1EE5),(0x1EE4);
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insert into t1 values (0x01B0),(0x01AF),(0x1EEB),(0x1EEA),(0x1EED),(0x1EEC),
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(0x1EEF),(0x1EEE),(0x1EE9),(0x1EE8),(0x1EF1),(0x1EF0);
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insert into t1 values ('v'),('V'),('x'),('X');
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insert into t1 values (0x0079),(0x0059),(0x1EF3),(0x1EF2),(0x1EF7),(0x1EF6),
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(0x1EF9),(0x1EF8),(0x00FD),(0x00DD),(0x1EF5),(0x1EF4);
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select hex(c1) as h, c1 from t1 order by c1, h;
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select group_concat(hex(c1) order by hex(c1)) from t1 group by c1;
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group_concat(hex(c1) order by hex(c1))
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0041,0061,00C0,00C1,00C3,00E0,00E1,00E3,1EA0,1EA1,1EA2,1EA3
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0102,0103,1EAE,1EAF,1EB0,1EB1,1EB2,1EB3,1EB4,1EB5,1EB6,1EB7
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00C2,00E2,1EA4,1EA5,1EA6,1EA7,1EA8,1EA9,1EAA,1EAB,1EAC,1EAD
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0045,0065,00C8,00C9,00E8,00E9,1EB8,1EB9,1EBA,1EBB,1EBC,1EBD
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00CA,00EA,1EBE,1EBF,1EC0,1EC1,1EC2,1EC3,1EC4,1EC5,1EC6,1EC7
271
0049,0069,00CC,00CD,00EC,00ED,0128,0129,1EC8,1EC9,1ECA,1ECB
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004F,006F,00D2,00D3,00D5,00F2,00F3,00F5,1ECC,1ECD,1ECE,1ECF
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00D4,00F4,1ED0,1ED1,1ED2,1ED3,1ED4,1ED5,1ED6,1ED7,1ED8,1ED9
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01A0,01A1,1EDA,1EDB,1EDC,1EDD,1EDE,1EDF,1EE0,1EE1,1EE2,1EE3
283
0055,0075,00D9,00DA,00F9,00FA,0168,0169,1EE4,1EE5,1EE6,1EE7
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01AF,01B0,1EE8,1EE9,1EEA,1EEB,1EEC,1EED,1EEE,1EEF,1EF0,1EF1
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0059,0079,00DD,00FD,1EF2,1EF3,1EF4,1EF5,1EF6,1EF7,1EF8,1EF9
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select group_concat(c1 order by hex(c1) SEPARATOR '') from t1 group by c1;
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group_concat(c1 order by hex(c1) SEPARATOR '')