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@ -2355,6 +2355,74 @@ EXPLAIN SELECT i FROM t1 WHERE i=1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index
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DROP TABLE t1;
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CREATE TABLE t1 ( a BLOB, INDEX (a(20)) );
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CREATE TABLE t2 ( a BLOB, INDEX (a(20)) );
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INSERT INTO t1 VALUES ('one'),('two'),('three'),('four'),('five');
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INSERT INTO t2 VALUES ('one'),('two'),('three'),('four'),('five');
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EXPLAIN SELECT * FROM t1 LEFT JOIN t2 USE INDEX (a) ON t1.a=t2.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5
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1 SIMPLE t2 ref a a 23 test.t1.a 2
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EXPLAIN SELECT * FROM t1 LEFT JOIN t2 FORCE INDEX (a) ON t1.a=t2.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5
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1 SIMPLE t2 ref a a 23 test.t1.a 2
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DROP TABLE t1, t2;
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CREATE TABLE t1 ( city char(30) );
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INSERT INTO t1 VALUES ('London');
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INSERT INTO t1 VALUES ('Paris');
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SELECT * FROM t1 WHERE city='London';
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city
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London
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SELECT * FROM t1 WHERE city='london';
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city
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London
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EXPLAIN SELECT * FROM t1 WHERE city='London' AND city='london';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
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SELECT * FROM t1 WHERE city='London' AND city='london';
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city
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London
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EXPLAIN SELECT * FROM t1 WHERE city LIKE '%london%' AND city='London';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
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SELECT * FROM t1 WHERE city LIKE '%london%' AND city='London';
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city
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London
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DROP TABLE t1;
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create table t1 (a int(11) unsigned, b int(11) unsigned);
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insert into t1 values (1,0), (1,1), (1,2);
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select a-b from t1 order by 1;
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a-b
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0
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1
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18446744073709551615
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select a-b , (a-b < 0) from t1 order by 1;
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a-b (a-b < 0)
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0 0
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1 0
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18446744073709551615 0
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select a-b as d, (a-b >= 0), b from t1 group by b having d >= 0;
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d (a-b >= 0) b
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1 1 0
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0 1 1
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18446744073709551615 1 2
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select cast((a - b) as unsigned) from t1 order by 1;
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cast((a - b) as unsigned)
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0
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1
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18446744073709551615
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drop table t1;
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create table t1 (a int(11));
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select all all * from t1;
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a
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select distinct distinct * from t1;
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a
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select all distinct * from t1;
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ERROR HY000: Incorrect usage of ALL and DISTINCT
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select distinct all * from t1;
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ERROR HY000: Incorrect usage of ALL and DISTINCT
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drop table t1;
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CREATE TABLE t1 (
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K2C4 varchar(4) character set latin1 collate latin1_bin NOT NULL default '',
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K4N4 varchar(4) character set latin1 collate latin1_bin NOT NULL default '0000',
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@ -2486,6 +2554,64 @@ ERROR HY000: Incorrect usage of ALL and DISTINCT
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select distinct all * from t1;
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ERROR HY000: Incorrect usage of ALL and DISTINCT
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drop table t1;
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CREATE TABLE t1 ( a BLOB, INDEX (a(20)) );
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CREATE TABLE t2 ( a BLOB, INDEX (a(20)) );
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INSERT INTO t1 VALUES ('one'),('two'),('three'),('four'),('five');
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INSERT INTO t2 VALUES ('one'),('two'),('three'),('four'),('five');
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EXPLAIN SELECT * FROM t1 LEFT JOIN t2 USE INDEX (a) ON t1.a=t2.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5
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1 SIMPLE t2 ref a a 23 test.t1.a 2
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EXPLAIN SELECT * FROM t1 LEFT JOIN t2 FORCE INDEX (a) ON t1.a=t2.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5
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1 SIMPLE t2 ref a a 23 test.t1.a 2
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DROP TABLE t1, t2;
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CREATE TABLE t1 ( city char(30) );
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INSERT INTO t1 VALUES ('London');
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INSERT INTO t1 VALUES ('Paris');
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SELECT * FROM t1 WHERE city='London';
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city
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London
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SELECT * FROM t1 WHERE city='london';
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city
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London
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EXPLAIN SELECT * FROM t1 WHERE city='London' AND city='london';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
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SELECT * FROM t1 WHERE city='London' AND city='london';
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city
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London
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EXPLAIN SELECT * FROM t1 WHERE city LIKE '%london%' AND city='London';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
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SELECT * FROM t1 WHERE city LIKE '%london%' AND city='London';
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city
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London
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DROP TABLE t1;
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create table t1 (a int(11) unsigned, b int(11) unsigned);
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insert into t1 values (1,0), (1,1), (1,2);
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select a-b from t1 order by 1;
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a-b
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0
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1
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18446744073709551615
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select a-b , (a-b < 0) from t1 order by 1;
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a-b (a-b < 0)
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0 0
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1 0
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18446744073709551615 0
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select a-b as d, (a-b >= 0), b from t1 group by b having d >= 0;
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d (a-b >= 0) b
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1 1 0
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0 1 1
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18446744073709551615 1 2
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select cast((a - b) as unsigned) from t1 order by 1;
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cast((a - b) as unsigned)
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0
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1
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18446744073709551615
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drop table t1;
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create table t1 (a int(11));
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select all all * from t1;
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a
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