572 lines
28 KiB
Plaintext
Executable File
572 lines
28 KiB
Plaintext
Executable File
drop table if exists t1;
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create table t1 (id int not null, str char(10), unique(str));
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explain select * from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 system NULL NULL NULL NULL 0 const row not found
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insert into t1 values (1, null),(2, null),(3, "foo"),(4, "bar");
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select * from t1 where str is null;
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id str
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1 NULL
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2 NULL
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select * from t1 where str="foo";
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id str
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3 foo
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explain select * from t1 where str is null;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref str str 11 const 1 Using index condition
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explain format=json select * from t1 where str is null;
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EXPLAIN
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{
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"query_block": {
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"select_id": 1,
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"table": {
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"table_name": "t1",
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"access_type": "ref",
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"possible_keys": [
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"str"
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],
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"key": "str",
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"used_key_parts": [
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"str"
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],
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"key_length": "11",
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"ref": [
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"const"
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],
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"rows": 1,
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"filtered": 100,
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"index_condition": "isnull(`test`.`t1`.`str`)"
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}
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}
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}
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t1`.`str` AS `str` from `test`.`t1` where isnull(`test`.`t1`.`str`)
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explain select * from t1 where str="foo";
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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 str str 11 const 1 NULL
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explain select * from t1 ignore key (str) where str="foo";
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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 4 Using where
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explain select * from t1 use key (str,str) where str="foo";
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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 str str 11 const 1 NULL
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explain select * from t1 use key (str,str,foo) where str="foo";
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ERROR 42000: Key 'foo' doesn't exist in table 't1'
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explain select * from t1 ignore key (str,str,foo) where str="foo";
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ERROR 42000: Key 'foo' doesn't exist in table 't1'
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drop table t1;
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explain select 1;
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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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create table t1 (a int not null);
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explain select count(*) from t1;
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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 Select tables optimized away
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insert into t1 values(1);
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explain select count(*) from t1;
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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 Select tables optimized away
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insert into t1 values(1);
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explain select count(*) from t1;
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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 Select tables optimized away
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drop table t1;
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set names koi8r;
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create table <20><><EFBFBD> (<28><><EFBFBD>0 int, <20><><EFBFBD>1 int, key <20><><EFBFBD>0 (<28><><EFBFBD>0), key <20><><EFBFBD>01 (<28><><EFBFBD>0,<2C><><EFBFBD>1));
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insert into <20><><EFBFBD> (<28><><EFBFBD>0) values (1);
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insert into <20><><EFBFBD> (<28><><EFBFBD>0) values (2);
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explain select <20><><EFBFBD>0 from <20><><EFBFBD> where <20><><EFBFBD>0=1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE <09><><EFBFBD> ref <09><><EFBFBD>0,<2C><><EFBFBD>01 <09><><EFBFBD>0 5 const 1 Using index
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drop table <20><><EFBFBD>;
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set names latin1;
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select 3 into @v1;
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explain select 3 into @v1;
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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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create table t1(f1 int, f2 int);
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insert into t1 values (1,1);
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create view v1 as select * from t1 where f1=1;
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explain extended select * from v1 where f2=1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select '1' AS `f1`,'1' AS `f2` from dual where 1
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explain extended select * from t1 where 0;
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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 Impossible WHERE
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2` from `test`.`t1` where 0
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explain extended select * from t1 where 1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select '1' AS `f1`,'1' AS `f2` from dual where 1
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explain extended select * from t1 having 0;
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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 Impossible HAVING
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2` from `test`.`t1` having 0
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explain extended select * from t1 having 1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select '1' AS `f1`,'1' AS `f2` from dual having 1
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drop view v1;
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drop table t1;
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CREATE TABLE t1(c INT);
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INSERT INTO t1 VALUES (),();
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CREATE TABLE t2 (b INT,
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b),
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KEY(b),KEY(b),KEY(b),KEY(b),KEY(b));
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Warnings:
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Note 1831 Duplicate index 'b_2' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_3' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_4' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_5' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_6' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_7' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_8' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_9' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_10' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_11' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_12' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_13' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_14' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_15' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_16' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_17' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_18' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_19' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_20' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_21' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_22' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_23' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_24' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_25' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_26' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_27' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_28' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_29' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_30' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_31' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_32' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_33' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_34' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_35' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_36' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_37' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_38' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_39' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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Note 1831 Duplicate index 'b_40' defined on the table 'test.t2'. This is deprecated and will be disallowed in a future release.
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INSERT INTO t2 VALUES (),(),();
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EXPLAIN SELECT 1 FROM
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(SELECT 1 FROM t2,t1 WHERE b < c GROUP BY 1 LIMIT 1) AS d2;
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id select_type table type possible_keys key key_len ref rows Extra
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X X X X X X X X X const row not found
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X X X X X X X X X NULL
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X X X X X X X X X Range checked for each record (index map: 0xFFFFFFFFFF)
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DROP TABLE t2;
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DROP TABLE t1;
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CREATE TABLE t1(a INT);
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CREATE TABLE t2(a INT);
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INSERT INTO t1 VALUES (1),(2);
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INSERT INTO t2 VALUES (1),(2);
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EXPLAIN EXTENDED SELECT 1
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FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 100.00 NULL
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop)
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Warnings:
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Note 1003 /* select#1 */ select 1 AS `1` from (/* select#2 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
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EXPLAIN EXTENDED SELECT 1
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FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 100.00 NULL
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop)
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Warnings:
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Note 1003 /* select#1 */ select 1 AS `1` from (/* select#2 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
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prepare s1 from
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'EXPLAIN EXTENDED SELECT 1
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FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1';
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execute s1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 100.00 NULL
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop)
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Warnings:
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Note 1003 /* select#1 */ select 1 AS `1` from (/* select#2 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
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prepare s1 from
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'EXPLAIN EXTENDED SELECT 1
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FROM (SELECT COUNT(DISTINCT t1.a) FROM t1,t2 GROUP BY t1.a) AS s1';
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execute s1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 100.00 NULL
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop)
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Warnings:
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Note 1003 /* select#1 */ select 1 AS `1` from (/* select#2 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
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execute s1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 100.00 NULL
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2 DERIVED t1 ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort
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2 DERIVED t2 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop)
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Warnings:
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Note 1003 /* select#1 */ select 1 AS `1` from (/* select#2 */ select count(distinct `test`.`t1`.`a`) AS `COUNT(DISTINCT t1.a)` from `test`.`t1` join `test`.`t2` group by `test`.`t1`.`a`) `s1`
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DROP TABLE t1,t2;
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CREATE TABLE t1 (a INT PRIMARY KEY);
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EXPLAIN EXTENDED SELECT COUNT(a) FROM t1 USE KEY(a);
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ERROR 42000: Key 'a' doesn't exist in table 't1'
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DROP TABLE t1;
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CREATE TABLE t1(a LONGTEXT);
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INSERT INTO t1 VALUES (repeat('a',@@global.max_allowed_packet));
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INSERT INTO t1 VALUES (repeat('b',@@global.max_allowed_packet));
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EXPLAIN SELECT DISTINCT 1 FROM t1,
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(SELECT a AS away FROM t1 GROUP BY a WITH ROLLUP) as d1
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WHERE t1.a = d1.a;
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ERROR 42S22: Unknown column 'd1.a' in 'where clause'
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EXPLAIN SELECT DISTINCT 1 FROM t1,
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(SELECT DISTINCTROW a AS away FROM t1 GROUP BY a WITH ROLLUP) as d1
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WHERE t1.a = d1.a;
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ERROR HY000: Incorrect usage of WITH ROLLUP and DISTINCT
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DROP TABLE t1;
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#
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# Bug#48295:
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# explain extended crash with subquery and ONLY_FULL_GROUP_BY sql_mode
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#
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CREATE TABLE t1 (f1 INT);
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SELECT @@session.sql_mode INTO @old_sql_mode;
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SET SESSION sql_mode='ONLY_FULL_GROUP_BY';
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EXPLAIN EXTENDED SELECT 1 FROM t1
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WHERE f1 > ALL( SELECT t.f1 FROM t1,t1 AS t );
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
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2 SUBQUERY t1 system NULL NULL NULL NULL 0 0.00 const row not found
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2 SUBQUERY t system NULL NULL NULL NULL 0 0.00 const row not found
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Warnings:
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Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` where 0
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SET SESSION sql_mode=@old_sql_mode;
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DROP TABLE t1;
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End of 5.0 tests.
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#
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# Bug#37870: Usage of uninitialized value caused failed assertion.
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#
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set @opt_sw_save= @@optimizer_switch;
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create table t1 (dt datetime not null, t time not null);
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create table t2 (dt datetime not null);
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insert into t1 values ('2001-01-01 1:1:1', '1:1:1'),
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('2001-01-01 1:1:1', '1:1:1');
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insert into t2 values ('2001-01-01 1:1:1'), ('2001-01-01 1:1:1');
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flush tables;
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EXPLAIN SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL );
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY OUTR ALL NULL NULL NULL NULL 2 Using where
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2 DEPENDENT SUBQUERY INNR ALL NULL NULL NULL NULL 2 Using where
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flush tables;
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SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN (SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.dt IS NULL );
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dt
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flush tables;
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EXPLAIN SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN ( SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.t < '2005-11-13 7:41:31' );
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY OUTR ALL NULL NULL NULL NULL 2 Using where
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2 DEPENDENT SUBQUERY INNR ALL NULL NULL NULL NULL 2 Using where
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flush tables;
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SELECT OUTR.dt FROM t1 AS OUTR WHERE OUTR.dt IN ( SELECT INNR.dt FROM t2 AS INNR WHERE OUTR.t < '2005-11-13 7:41:31' );
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dt
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2001-01-01 01:01:01
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2001-01-01 01:01:01
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drop tables t1, t2;
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set optimizer_switch= @opt_sw_save;
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#
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# Bug#47669: Query showed by EXPLAIN EXTENDED gives different result from original query
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#
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CREATE TABLE t1 (c int);
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INSERT INTO t1 VALUES (NULL);
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CREATE TABLE t2 (d int);
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INSERT INTO t2 VALUES (NULL), (0);
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EXPLAIN EXTENDED SELECT (SELECT 1 FROM t2 WHERE d = c) FROM t1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 system NULL NULL NULL NULL 1 100.00 NULL
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2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00 Using where
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Warnings:
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Note 1276 Field or reference 'test.t1.c' of SELECT #2 was resolved in SELECT #1
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Note 1003 /* select#1 */ select (/* select#2 */ select 1 from `test`.`t2` where (`test`.`t2`.`d` = NULL)) AS `(SELECT 1 FROM t2 WHERE d = c)` from dual
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DROP TABLE t1, t2;
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#
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# Bug#30302: Tables that were optimized away are printed in the
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# EXPLAIN EXTENDED warning.
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#
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create table t1(f1 int);
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create table t2(f2 int);
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insert into t1 values(1);
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insert into t2 values(1),(2);
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explain extended select * from t1 where f1=1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 NULL
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Warnings:
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Note 1003 /* select#1 */ select '1' AS `f1` from dual where 1
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explain extended select * from t1 join t2 on f1=f2 where f1=1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 system NULL NULL NULL NULL 1 100.00 NULL
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1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where
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Warnings:
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Note 1003 /* select#1 */ select '1' AS `f1`,`test`.`t2`.`f2` AS `f2` from `test`.`t2` where (`test`.`t2`.`f2` = 1)
|
||
drop table t1,t2;
|
||
#
|
||
# Bug #48419: another explain crash..
|
||
#
|
||
CREATE TABLE t1 (a INT);
|
||
CREATE TABLE t2 (b BLOB, KEY b(b(100)));
|
||
INSERT INTO t2 VALUES ('1'), ('2'), ('3');
|
||
FLUSH TABLES;
|
||
EXPLAIN SELECT 1 FROM t1 WHERE a = (SELECT 1 FROM t1 t JOIN t2 WHERE b <= 1 AND t.a);
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
||
2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
||
DROP TABLE t1, t2;
|
||
#
|
||
# Bug #48573: difference of index selection between rpm binary and
|
||
# .tar.gz, windows vs linux..
|
||
#
|
||
CREATE TABLE t1(c1 INT, c2 INT, c4 INT, c5 INT, KEY(c2, c5), KEY(c2, c4, c5));
|
||
INSERT INTO t1 VALUES(4, 1, 1, 1);
|
||
INSERT INTO t1 VALUES(3, 1, 1, 1);
|
||
INSERT INTO t1 VALUES(2, 1, 1, 1);
|
||
INSERT INTO t1 VALUES(1, 1, 1, 1);
|
||
EXPLAIN SELECT c1 FROM t1 WHERE c2 = 1 AND c4 = 1 AND c5 = 1;
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 SIMPLE t1 ref c2,c2_2 c2 10 const,const 3 Using where
|
||
DROP TABLE t1;
|
||
#
|
||
# Bug#56814 Explain + subselect + fulltext crashes server
|
||
#
|
||
CREATE TABLE t1(f1 VARCHAR(6) NOT NULL,
|
||
FULLTEXT KEY(f1),UNIQUE(f1));
|
||
INSERT INTO t1 VALUES ('test');
|
||
EXPLAIN SELECT 1 FROM t1
|
||
WHERE 1 > ALL((SELECT 1 FROM t1 JOIN t1 a ON (MATCH(t1.f1) AGAINST (""))
|
||
WHERE t1.f1 GROUP BY t1.f1));
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 PRIMARY t1 system NULL NULL NULL NULL 1 NULL
|
||
2 SUBQUERY a system NULL NULL NULL NULL 1 NULL
|
||
2 SUBQUERY t1 fulltext f1 f1 0 NULL 1 Using where
|
||
PREPARE stmt FROM
|
||
'EXPLAIN SELECT 1 FROM t1
|
||
WHERE 1 > ALL((SELECT 1 FROM t1 RIGHT OUTER JOIN t1 a
|
||
ON (MATCH(t1.f1) AGAINST (""))
|
||
WHERE t1.f1 GROUP BY t1.f1))';
|
||
EXECUTE stmt;
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 PRIMARY t1 system NULL NULL NULL NULL 1 NULL
|
||
2 SUBQUERY a system NULL NULL NULL NULL 1 NULL
|
||
2 SUBQUERY t1 fulltext f1 f1 0 NULL 1 Using where
|
||
EXECUTE stmt;
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 PRIMARY t1 system NULL NULL NULL NULL 1 NULL
|
||
2 SUBQUERY a system NULL NULL NULL NULL 1 NULL
|
||
2 SUBQUERY t1 fulltext f1 f1 0 NULL 1 Using where
|
||
DEALLOCATE PREPARE stmt;
|
||
PREPARE stmt FROM
|
||
'EXPLAIN SELECT 1 FROM t1
|
||
WHERE 1 > ALL((SELECT 1 FROM t1 JOIN t1 a
|
||
ON (MATCH(t1.f1) AGAINST (""))
|
||
WHERE t1.f1 GROUP BY t1.f1))';
|
||
EXECUTE stmt;
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 PRIMARY t1 system NULL NULL NULL NULL 1 NULL
|
||
2 SUBQUERY a system NULL NULL NULL NULL 1 NULL
|
||
2 SUBQUERY t1 fulltext f1 f1 0 NULL 1 Using where
|
||
EXECUTE stmt;
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 PRIMARY t1 system NULL NULL NULL NULL 1 NULL
|
||
2 SUBQUERY a system NULL NULL NULL NULL 1 NULL
|
||
2 SUBQUERY t1 fulltext f1 f1 0 NULL 1 Using where
|
||
DEALLOCATE PREPARE stmt;
|
||
DROP TABLE t1;
|
||
End of 5.1 tests.
|
||
#
|
||
# Bug#46860:
|
||
# Crash/segfault using EXPLAIN EXTENDED on query using UNION in subquery.
|
||
#
|
||
drop table if exists t1;
|
||
create table `t1` (`a` int);
|
||
explain extended select 1 from `t1`, `t1` as `t2`
|
||
where `t1`.`a` > all ( (select `a` from `t1` ) union (select `a`) );
|
||
ERROR 23000: Column 'a' in field list is ambiguous
|
||
drop table t1;
|
||
#
|
||
# BUG#30597: Change EXPLAIN output to include extrema of
|
||
# UNION components
|
||
#
|
||
EXPLAIN
|
||
SELECT 1
|
||
UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
|
||
UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
|
||
UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
|
||
UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
|
||
UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
|
||
UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1 UNION ALL SELECT 1
|
||
;
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
2 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
3 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
4 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
5 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
6 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
7 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
8 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
9 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
10 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
11 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
12 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
13 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
14 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
15 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
16 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
17 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
18 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
19 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
20 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
21 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
22 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
23 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
24 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
25 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
|
||
NULL UNION RESULT <union1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,...,25> ALL NULL NULL NULL NULL NULL Using temporary
|
||
# End BUG#30597
|
||
#
|
||
# BUG#53562: EXPLAIN statement should hint when
|
||
# index is not used due to type conversion
|
||
#
|
||
CREATE TABLE t1 (url char(1) PRIMARY KEY);
|
||
INSERT INTO t1 VALUES ('1'),('2'),('3'),('4'),('5');
|
||
|
||
# Normally, lookup access on primary key is done
|
||
EXPLAIN EXTENDED SELECT * FROM t1 WHERE url='1';
|
||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||
1 SIMPLE t1 const PRIMARY PRIMARY 1 const 1 100.00 Using index
|
||
Warnings:
|
||
Note 1003 /* select#1 */ select '1' AS `url` from `test`.`t1` where 1
|
||
|
||
# Test that index can't be used for lookup due to type conversion
|
||
# (comparing char and int)
|
||
SELECT * FROM t1 WHERE url=1;
|
||
url
|
||
1
|
||
EXPLAIN EXTENDED SELECT * FROM t1 WHERE url=1;
|
||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||
1 SIMPLE t1 index PRIMARY PRIMARY 1 NULL 5 100.00 Using where; Using index
|
||
Warnings:
|
||
Warning 1739 Cannot use ref access on index 'PRIMARY' due to type or collation conversion on field 'url'
|
||
Warning 1739 Cannot use range access on index 'PRIMARY' due to type or collation conversion on field 'url'
|
||
Note 1003 /* select#1 */ select `test`.`t1`.`url` AS `url` from `test`.`t1` where (`test`.`t1`.`url` = 1)
|
||
|
||
# Test that index can't be used for lookup due to collation mismatch
|
||
SELECT * FROM t1 WHERE url='1' collate latin1_german2_ci;
|
||
url
|
||
1
|
||
EXPLAIN EXTENDED SELECT * FROM t1 WHERE url='1' collate latin1_german2_ci;
|
||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||
1 SIMPLE t1 index PRIMARY PRIMARY 1 NULL 5 100.00 Using where; Using index
|
||
Warnings:
|
||
Warning 1739 Cannot use ref access on index 'PRIMARY' due to type or collation conversion on field 'url'
|
||
Warning 1739 Cannot use range access on index 'PRIMARY' due to type or collation conversion on field 'url'
|
||
Note 1003 /* select#1 */ select `test`.`t1`.`url` AS `url` from `test`.`t1` where (`test`.`t1`.`url` = <cache>(('1' collate latin1_german2_ci)))
|
||
|
||
# Normally, range access on primary key is done
|
||
EXPLAIN EXTENDED SELECT * FROM t1 WHERE url>'3';
|
||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||
1 SIMPLE t1 range PRIMARY PRIMARY 1 NULL 3 100.00 Using where; Using index
|
||
Warnings:
|
||
Note 1003 /* select#1 */ select `test`.`t1`.`url` AS `url` from `test`.`t1` where (`test`.`t1`.`url` > '3')
|
||
|
||
# Test that range access on index can't be done due to type conversion
|
||
# (comparing char and int)
|
||
SELECT * FROM t1 WHERE url>3;
|
||
url
|
||
4
|
||
5
|
||
EXPLAIN EXTENDED SELECT * FROM t1 WHERE url>3;
|
||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||
1 SIMPLE t1 index PRIMARY PRIMARY 1 NULL 5 100.00 Using where; Using index
|
||
Warnings:
|
||
Warning 1739 Cannot use range access on index 'PRIMARY' due to type or collation conversion on field 'url'
|
||
Note 1003 /* select#1 */ select `test`.`t1`.`url` AS `url` from `test`.`t1` where (`test`.`t1`.`url` > 3)
|
||
|
||
# Test that range access on index can't be done due to collation mismatch
|
||
SELECT * FROM t1 WHERE url>'3' collate latin1_german2_ci;
|
||
url
|
||
4
|
||
5
|
||
EXPLAIN EXTENDED SELECT * FROM t1 WHERE url>'3' collate latin1_german2_ci;
|
||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||
1 SIMPLE t1 index PRIMARY PRIMARY 1 NULL 5 100.00 Using where; Using index
|
||
Warnings:
|
||
Warning 1739 Cannot use range access on index 'PRIMARY' due to type or collation conversion on field 'url'
|
||
Note 1003 /* select#1 */ select `test`.`t1`.`url` AS `url` from `test`.`t1` where (`test`.`t1`.`url` > <cache>(('3' collate latin1_german2_ci)))
|
||
|
||
DROP TABLE t1;
|
||
# End BUG#53562
|
||
#
|
||
# Bug#11829785 EXPLAIN EXTENDED CRASH WITH RIGHT OUTER JOIN, SUBQUERIES
|
||
#
|
||
CREATE TABLE t1(a INT);
|
||
INSERT INTO t1 VALUES (0), (0);
|
||
PREPARE s FROM
|
||
'EXPLAIN EXTENDED
|
||
SELECT SUBSTRING(1, (SELECT 1 FROM t1 a1 RIGHT OUTER JOIN t1 ON 0)) AS d
|
||
FROM t1 WHERE 0 > ANY (SELECT @a FROM t1)';
|
||
# After WL#4443 we don't evaluate subqueries during prepare, so no error.
|
||
EXECUTE s;
|
||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||
3 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL Impossible HAVING
|
||
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00 NULL
|
||
2 SUBQUERY a1 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (Block Nested Loop)
|
||
Warnings:
|
||
Note 1003 /* select#1 */ select substr(1,(/* select#2 */ select 1 from `test`.`t1` left join `test`.`t1` `a1` on(0) where 1)) AS `d` from `test`.`t1` where <nop>(<in_optimizer>(0,<exists>(/* select#3 */ select (@`a`) from `test`.`t1` where 1 having 0)))
|
||
DEALLOCATE PREPARE s;
|
||
DROP TABLE t1;
|
||
#
|
||
# WL#4897: Add EXPLAIN INSERT/UPDATE/DELETE
|
||
#
|
||
# Coverage tests after code refactoring
|
||
#
|
||
CREATE TABLE t1 (a INT);
|
||
INSERT INTO t1 VALUES (1),(2),(3);
|
||
CREATE TABLE t2 (a INT);
|
||
INSERT INTO t2 VALUES (3),(4),(5);
|
||
# EXPLAIN must return 3 rows:
|
||
EXPLAIN SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 2,2;
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 NULL
|
||
2 UNION t2 ALL NULL NULL NULL NULL 3 NULL
|
||
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL Using temporary
|
||
DROP TABLE t1, t2;
|
||
# End WL#4897
|
||
End of 6.0 tests.
|
||
#
|
||
# Bug #18899860: EXPLAIN .. SELECT .. FOR UPDATE TAKES LOCKS
|
||
#
|
||
CREATE TABLE t1(c1 INT PRIMARY KEY) ENGINE=INNODB;
|
||
INSERT INTO t1 VALUES (1),(2),(3);
|
||
START TRANSACTION;
|
||
EXPLAIN SELECT * FROM t1 WHERE c1 = 1 FOR UPDATE;
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index
|
||
START TRANSACTION;
|
||
EXPLAIN SELECT * FROM t1 WHERE c1 = 1 FOR UPDATE;
|
||
id select_type table type possible_keys key key_len ref rows Extra
|
||
1 SIMPLE t1 const PRIMARY PRIMARY 4 const 1 Using index
|
||
DROP TABLE t1;
|
||
# End of test for Bug#18899860
|