mirror of
https://github.com/MariaDB/server.git
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182 lines
4.6 KiB
Plaintext
182 lines
4.6 KiB
Plaintext
USE test;
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#
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# MDEV-14013 : sql_mode=EMPTY_STRING_IS_NULL
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#
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set @mode='EMPTY_STRING_IS_NULL';
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SET SESSION character_set_connection=latin2;
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SET SESSION character_set_client=cp1250;
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#
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# Test litteral
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#
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SET sql_mode=@mode;
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select @@sql_mode;
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@@sql_mode
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EMPTY_STRING_IS_NULL
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SELECT '',CHARSET(''), null, CHARSET(null), CAST(null as char(10)), CHARSET(CAST(null as char(10))), 'x', CHARSET('x');
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NULL CHARSET('') NULL CHARSET(null) CAST(null as char(10)) CHARSET(CAST(null as char(10))) x CHARSET('x')
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NULL latin2 NULL binary NULL latin2 x latin2
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SELECT CHARSET(NULLIF('','')),NULLIF('','');
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CHARSET(NULLIF('','')) NULLIF('','')
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latin2 NULL
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SET sql_mode=default;
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SELECT '',CHARSET(''), null, CHARSET(null), CAST(null as char(10)), CHARSET(CAST(null as char(10))), 'x', CHARSET('x');
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CHARSET('') NULL CHARSET(null) CAST(null as char(10)) CHARSET(CAST(null as char(10))) x CHARSET('x')
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latin2 NULL binary NULL latin2 x latin2
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SELECT CHARSET(NULLIF('','')),NULLIF('','');
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CHARSET(NULLIF('','')) NULLIF('','')
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latin2 NULL
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#
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# Test NCHAR litteral
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#
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SET sql_mode=@mode;
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SELECT N'',CHARSET(N''), N'x', CHARSET(N'x');
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NULL CHARSET(N'') x CHARSET(N'x')
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NULL utf8 x utf8
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SELECT CHARSET(NULLIF(N'',N'')),NULLIF(N'',N'');
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CHARSET(NULLIF(N'',N'')) NULLIF(N'',N'')
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utf8 NULL
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SET sql_mode=default;
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SELECT N'',CHARSET(N''), N'x', CHARSET(N'x');
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CHARSET(N'') x CHARSET(N'x')
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utf8 x utf8
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SELECT CHARSET(NULLIF(N'',N'')),NULLIF(N'',N'');
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CHARSET(NULLIF(N'',N'')) NULLIF(N'',N'')
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utf8 NULL
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#
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# Test CHARSET prefix litteral
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#
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SET sql_mode=@mode;
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SELECT _cp1250 '',CHARSET(_cp1250 ''), _cp1250 'x', CHARSET(_cp1250 'x');
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NULL CHARSET(_cp1250 '') x CHARSET(_cp1250 'x')
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NULL cp1250 x cp1250
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SELECT CHARSET(NULLIF(_cp1250 '',_cp1250 '')),NULLIF(_cp1250 '',_cp1250 '');
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CHARSET(NULLIF(_cp1250 '',_cp1250 '')) NULLIF(_cp1250 '',_cp1250 '')
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cp1250 NULL
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SET sql_mode=default;
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SELECT _cp1250 '',CHARSET(_cp1250 ''), _cp1250 'x', CHARSET(_cp1250 'x');
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CHARSET(_cp1250 '') x CHARSET(_cp1250 'x')
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cp1250 x cp1250
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SELECT CHARSET(NULLIF(_cp1250 '',_cp1250 '')),NULLIF(_cp1250 '',_cp1250 '');
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CHARSET(NULLIF(_cp1250 '',_cp1250 '')) NULLIF(_cp1250 '',_cp1250 '')
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cp1250 NULL
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SET sql_mode=@mode;
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#
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# Test litteral concat
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#
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SELECT 'a' 'b';
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a
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ab
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SELECT 'a' '';
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a
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a
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SELECT '' 'b';
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b
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b
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SELECT '' '';
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NULL
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NULL
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SELECT '' 'b' 'c';
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b
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bc
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SELECT '' '' 'c';
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c
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c
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SELECT 'a' '' 'c';
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a
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ac
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SELECT 'a' '' '';
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a
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a
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SELECT '' '' '';
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NULL
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NULL
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SELECT '' '' '',CHARSET('' '' '');
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NULL CHARSET('' '' '')
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NULL latin2
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SELECT _latin1'' '' '',CHARSET(_latin1'' '' '');
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NULL CHARSET(_latin1'' '' '')
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NULL latin1
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SELECT N'' '' '',CHARSET(N'' '' '');
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NULL CHARSET(N'' '' '')
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NULL utf8
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#
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# UNION - implicit group by
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#
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SELECT 1, null
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UNION
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SELECT 1 , ''
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ORDER BY 1;
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1 NULL
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1 NULL
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SELECT 1, null
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UNION
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SELECT 1 , N''
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ORDER BY 1;
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1 NULL
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1 NULL
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SELECT 1, null
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UNION
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SELECT 1 , _cp1250 ''
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ORDER BY 1;
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1 NULL
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1 NULL
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SELECT NULLIF(_cp1250 '',_cp1250 '')
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UNION
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SELECT NULLIF(N'',N'');
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NULLIF(_cp1250 '',_cp1250 '')
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NULL
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SELECT 1 , _latin2 ''
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UNION
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SELECT 1 , _cp1250 '';
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ERROR HY000: Illegal mix of collations (latin2_general_ci,IGNORABLE) and (cp1250_general_ci,IGNORABLE) for operation 'UNION'
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SELECT 1, null
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UNION
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SELECT 1 , ''
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UNION
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SELECT 1 , N'';
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1 NULL
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1 NULL
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CREATE TABLE t1 (c1 INT,c2 VARCHAR(10));
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INSERT INTO t1 VALUES (1,'one');
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INSERT INTO t1 VALUES (1,'');
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INSERT INTO t1 VALUES (1,null);
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#
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# Test in a view
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#
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CREATE VIEW v1
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AS SELECT c1, c2
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FROM t1
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UNION
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SELECT c1 , ''
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FROM t1
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ORDER BY 1,2;
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SELECT * FROM v1;
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c1 c2
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1 NULL
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1 one
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SHOW CREATE VIEW v1;
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View Create View character_set_client collation_connection
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v1 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select `t1`.`c1` AS `c1`,`t1`.`c2` AS `c2` from `t1` union select `t1`.`c1` AS `c1`,NULL AS `NULL` from `t1` order by 1,2 cp1250 latin2_general_ci
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DROP VIEW v1;
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DROP TABLE t1;
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EXPLAIN EXTENDED SELECT '';
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select NULL AS `NULL`
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EXPLAIN EXTENDED SELECT _latin1'';
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select NULL AS `NULL`
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EXPLAIN EXTENDED SELECT N'';
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select NULL AS `NULL`
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EXPLAIN EXTENDED SELECT '' '';
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select NULL AS `NULL`
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