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08f192f81b
The problem was that we restored SQL_CACHE, SQL_NO_CACHE flags in SELECT statement from internal structures based on value set later at runtime, not the original value set by the user. The solution is to remember that original value.
98 lines
2.6 KiB
Plaintext
98 lines
2.6 KiB
Plaintext
select database();
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database()
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test
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select charset(database());
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charset(database())
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utf8
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select database() = "test";
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database() = "test"
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1
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select database() = _utf8"test";
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database() = _utf8"test"
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1
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select database() = _latin1"test";
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database() = _latin1"test"
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1
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select user() like "%@%";
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user() like "%@%"
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1
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select user() like _utf8"%@%";
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user() like _utf8"%@%"
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1
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select user() like _latin1"%@%";
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user() like _latin1"%@%"
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1
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select charset(user());
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charset(user())
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utf8
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select version()>="3.23.29";
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version()>="3.23.29"
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1
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select version()>=_utf8"3.23.29";
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version()>=_utf8"3.23.29"
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1
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select version()>=_latin1"3.23.29";
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version()>=_latin1"3.23.29"
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1
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select charset(version());
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charset(version())
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utf8
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explain extended select database(), user();
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 select database() AS `database()`,user() AS `user()`
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create table t1 (version char(40)) select database(), user(), version() as 'version';
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`database()` varchar(34) character set utf8 default NULL,
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`user()` varchar(77) character set utf8 NOT NULL default '',
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`version` char(40) default NULL
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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drop table t1;
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select charset(charset(_utf8'a')), charset(collation(_utf8'a'));
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charset(charset(_utf8'a')) charset(collation(_utf8'a'))
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utf8 utf8
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select collation(charset(_utf8'a')), collation(collation(_utf8'a'));
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collation(charset(_utf8'a')) collation(collation(_utf8'a'))
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utf8_general_ci utf8_general_ci
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create table t1 select charset(_utf8'a'), collation(_utf8'a');
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show create table t1;
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Table Create Table
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t1 CREATE TABLE `t1` (
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`charset(_utf8'a')` varchar(64) character set utf8 NOT NULL default '',
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`collation(_utf8'a')` varchar(64) character set utf8 NOT NULL default ''
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) ENGINE=MyISAM DEFAULT CHARSET=latin1
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drop table t1;
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select TRUE,FALSE,NULL;
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TRUE FALSE NULL
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1 0 NULL
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create table t1 (c1 char(5)) character set=latin1;
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insert into t1 values('row 1');
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insert into t1 values('row 2');
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insert into t1 values('row 3');
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select concat(user(), '--', c1) from t1;
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concat(user(), '--', c1)
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root@localhost--row 1
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root@localhost--row 2
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root@localhost--row 3
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select concat(database(), '--', c1) from t1;
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concat(database(), '--', c1)
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test--row 1
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test--row 2
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test--row 3
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drop table t1;
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create table t1 (a char(10)) character set latin1;
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select * from t1 where a=version();
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a
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select * from t1 where a=database();
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a
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select * from t1 where a=user();
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a
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insert into t1 values ('a');
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select left(concat(a,version()),1) from t1;
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left(concat(a,version()),1)
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a
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drop table t1;
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