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|
set @is_enable_default = @@global.ndb_index_stat_enable;
set @is_enable = 0;
set @is_enable = NULL;
# is_enable_on=0 is_enable_off=1
# ndb_index_stat_enable - before
show global variables like 'ndb_index_stat_enable';
Variable_name Value
ndb_index_stat_enable ON
show local variables like 'ndb_index_stat_enable';
Variable_name Value
ndb_index_stat_enable ON
set @@local.ndb_index_stat_enable = 0;
set @@global.ndb_index_stat_enable = 0;
# ndb_index_stat_enable - after
show global variables like 'ndb_index_stat_enable';
Variable_name Value
ndb_index_stat_enable OFF
show local variables like 'ndb_index_stat_enable';
Variable_name Value
ndb_index_stat_enable OFF
CREATE TABLE t10(
K INT NOT NULL AUTO_INCREMENT,
I INT, J INT,
PRIMARY KEY(K),
KEY(I,J),
UNIQUE KEY(J,K)
) ENGINE=ndbcluster
partition by key (K) partitions 1;
INSERT INTO t10(I,J) VALUES (1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9),(0,0);
CREATE TABLE t100 LIKE t10;
INSERT INTO t100(I,J)
SELECT X.J, X.J+(10*Y.J) FROM t10 AS X,t10 AS Y;
CREATE TABLE t10000 LIKE t10;
ALTER TABLE t10000 ENGINE=INNODB;
INSERT INTO t10000(I,J)
SELECT X.J, X.J+(100*Y.J) FROM t100 AS X,t100 AS Y;
ALTER TABLE t10000 ENGINE=NDBCLUSTER;
ANALYZE TABLE t10,t100,t10000;
Table Op Msg_type Msg_text
test.t10 analyze status OK
test.t100 analyze status OK
test.t10000 analyze status OK
SELECT COUNT(*) FROM t10;
COUNT(*)
10
SELECT COUNT(*) FROM t100;
COUNT(*)
100
SELECT COUNT(*) FROM t10000;
COUNT(*)
10000
EXPLAIN
SELECT * FROM t10000 WHERE k = 42;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 eq_ref PRIMARY PRIMARY 4 const 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where (`test`.`t10000`.`K` = 42)
EXPLAIN
SELECT * FROM t10000 WHERE k >= 42 and k < 10000;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range PRIMARY PRIMARY 4 NULL 500 100.00 Using pushed condition ((`test`.`t10000`.`K` >= 42) and (`test`.`t10000`.`K` < 10000)); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`K` >= 42) and (`test`.`t10000`.`K` < 10000))
EXPLAIN
SELECT * FROM t10000 WHERE k BETWEEN 42 AND 10000;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range PRIMARY PRIMARY 4 NULL 500 100.00 Using pushed condition (`test`.`t10000`.`K` between 42 and 10000); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where (`test`.`t10000`.`K` between 42 and 10000)
EXPLAIN
SELECT * FROM t10000 WHERE k < 42;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range PRIMARY PRIMARY 4 NULL 1000 100.00 Using pushed condition (`test`.`t10000`.`K` < 42); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where (`test`.`t10000`.`K` < 42)
EXPLAIN
SELECT * FROM t10000 WHERE k > 42;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range PRIMARY PRIMARY 4 NULL 1000 100.00 Using pushed condition (`test`.`t10000`.`K` > 42); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where (`test`.`t10000`.`K` > 42)
EXPLAIN
SELECT * FROM t10000 AS x JOIN t10000 AS y
ON y.i=x.i AND y.j = x.i;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE x p0 ALL I NULL NULL NULL 10000 100.00 Parent of 2 pushed join@1; Using pushed condition (`test`.`x`.`I` is not null)
1 SIMPLE y p0 ref J,I I 10 test.x.I,test.x.I 11 100.00 Child of 'x' in pushed join@1
Warnings:
Note 1003 /* select#1 */ select `test`.`x`.`K` AS `K`,`test`.`x`.`I` AS `I`,`test`.`x`.`J` AS `J`,`test`.`y`.`K` AS `K`,`test`.`y`.`I` AS `I`,`test`.`y`.`J` AS `J` from `test`.`t10000` `x` join `test`.`t10000` `y` where ((`test`.`y`.`I` = `test`.`x`.`I`) and (`test`.`y`.`J` = `test`.`x`.`I`))
EXPLAIN
SELECT * FROM t100 WHERE k < 42;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t100 p0 range PRIMARY PRIMARY 4 NULL 10 100.00 Using pushed condition (`test`.`t100`.`K` < 42); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t100`.`K` AS `K`,`test`.`t100`.`I` AS `I`,`test`.`t100`.`J` AS `J` from `test`.`t100` where (`test`.`t100`.`K` < 42)
EXPLAIN
SELECT * FROM t100 WHERE k > 42;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t100 p0 range PRIMARY PRIMARY 4 NULL 10 100.00 Using pushed condition (`test`.`t100`.`K` > 42); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t100`.`K` AS `K`,`test`.`t100`.`I` AS `I`,`test`.`t100`.`J` AS `J` from `test`.`t100` where (`test`.`t100`.`K` > 42)
EXPLAIN
SELECT * FROM t10000 WHERE k < 42;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range PRIMARY PRIMARY 4 NULL 1000 100.00 Using pushed condition (`test`.`t10000`.`K` < 42); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where (`test`.`t10000`.`K` < 42)
EXPLAIN
SELECT * FROM t10000 WHERE k > 42;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range PRIMARY PRIMARY 4 NULL 1000 100.00 Using pushed condition (`test`.`t10000`.`K` > 42); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where (`test`.`t10000`.`K` > 42)
EXPLAIN
SELECT * FROM t100 WHERE k BETWEEN 42 AND 10000;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t100 p0 range PRIMARY PRIMARY 4 NULL 5 100.00 Using pushed condition (`test`.`t100`.`K` between 42 and 10000); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t100`.`K` AS `K`,`test`.`t100`.`I` AS `I`,`test`.`t100`.`J` AS `J` from `test`.`t100` where (`test`.`t100`.`K` between 42 and 10000)
EXPLAIN
SELECT * FROM t10000 WHERE k BETWEEN 42 AND 10000;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range PRIMARY PRIMARY 4 NULL 500 100.00 Using pushed condition (`test`.`t10000`.`K` between 42 and 10000); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where (`test`.`t10000`.`K` between 42 and 10000)
EXPLAIN
SELECT * FROM t10000 WHERE I = 0;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 ref I I 5 const 200 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where (`test`.`t10000`.`I` = 0)
EXPLAIN
SELECT * FROM t10000 WHERE J = 0;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 ref J J 5 const 166 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where (`test`.`t10000`.`J` = 0)
EXPLAIN
SELECT * FROM t10000 WHERE I = 0 AND J = 0;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 ref J,I I 10 const,const 21 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`J` = 0) and (`test`.`t10000`.`I` = 0))
EXPLAIN
SELECT * FROM t10000 WHERE I = 0;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 ref I I 5 const 200 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where (`test`.`t10000`.`I` = 0)
EXPLAIN
SELECT * FROM t10000 WHERE I = 0 AND J > 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range J,I I 10 NULL 100 100.00 Using pushed condition ((`test`.`t10000`.`I` = 0) and (`test`.`t10000`.`J` > 1)); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`I` = 0) and (`test`.`t10000`.`J` > 1))
EXPLAIN
SELECT * FROM t10000 WHERE I = 0 AND J < 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range J,I I 10 NULL 50 100.00 Using pushed condition ((`test`.`t10000`.`I` = 0) and (`test`.`t10000`.`J` < 1)); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`I` = 0) and (`test`.`t10000`.`J` < 1))
EXPLAIN
SELECT * FROM t10000 WHERE I = 0 AND J BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range J,I I 10 NULL 50 100.00 Using pushed condition ((`test`.`t10000`.`I` = 0) and (`test`.`t10000`.`J` between 1 and 10)); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`I` = 0) and (`test`.`t10000`.`J` between 1 and 10))
EXPLAIN
SELECT * FROM t10000 WHERE I = 0 AND J = 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 ref J,I I 10 const,const 21 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`J` = 1) and (`test`.`t10000`.`I` = 0))
EXPLAIN
SELECT * FROM t10000 WHERE J = 0;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 ref J J 5 const 166 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where (`test`.`t10000`.`J` = 0)
EXPLAIN
SELECT * FROM t10000 WHERE J = 0 AND K > 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range PRIMARY,J J 9 NULL 83 100.00 Using pushed condition ((`test`.`t10000`.`J` = 0) and (`test`.`t10000`.`K` > 1)); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`J` = 0) and (`test`.`t10000`.`K` > 1))
EXPLAIN
SELECT * FROM t10000 WHERE J = 0 AND K < 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range PRIMARY,J J 9 NULL 83 100.00 Using pushed condition ((`test`.`t10000`.`J` = 0) and (`test`.`t10000`.`K` < 1)); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`J` = 0) and (`test`.`t10000`.`K` < 1))
EXPLAIN
SELECT * FROM t10000 WHERE J = 0 AND K BETWEEN 1 AND 10;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range PRIMARY,J J 9 NULL 41 100.00 Using pushed condition ((`test`.`t10000`.`J` = 0) and (`test`.`t10000`.`K` between 1 and 10)); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`J` = 0) and (`test`.`t10000`.`K` between 1 and 10))
EXPLAIN
SELECT * FROM t10000 WHERE J = 0 AND K = 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 eq_ref PRIMARY,J PRIMARY 4 const 1 10.00 Using where
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`K` = 1) and (`test`.`t10000`.`J` = 0))
EXPLAIN
SELECT * FROM t10000 WHERE I = 0 AND J <> 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range J,I I 10 NULL 150 100.00 Using pushed condition ((`test`.`t10000`.`I` = 0) and (`test`.`t10000`.`J` <> 1)); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`I` = 0) and (`test`.`t10000`.`J` <> 1))
EXPLAIN
SELECT * FROM t10000 WHERE I <> 0 AND J = 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 ref J,I J 5 const 166 15.00 Using pushed condition (`test`.`t10000`.`I` <> 0)
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`J` = 1) and (`test`.`t10000`.`I` <> 0))
EXPLAIN
SELECT * FROM t10000 WHERE I <> 0 AND J <> 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range J,I J 5 NULL 1500 15.00 Using pushed condition ((`test`.`t10000`.`I` <> 0) and (`test`.`t10000`.`J` <> 1)); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`I` <> 0) and (`test`.`t10000`.`J` <> 1))
EXPLAIN
SELECT * FROM t10000 WHERE J <> 1 AND I = 0;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range J,I I 10 NULL 150 100.00 Using pushed condition ((`test`.`t10000`.`I` = 0) and (`test`.`t10000`.`J` <> 1)); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`I` = 0) and (`test`.`t10000`.`J` <> 1))
EXPLAIN
SELECT * FROM t10000 WHERE J = 1 AND I <> 0;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 ref J,I J 5 const 166 15.00 Using pushed condition (`test`.`t10000`.`I` <> 0)
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`J` = 1) and (`test`.`t10000`.`I` <> 0))
EXPLAIN
SELECT * FROM t10000 WHERE J <> 1 AND I <> 0;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t10000 p0 range J,I J 5 NULL 1500 15.00 Using pushed condition ((`test`.`t10000`.`J` <> 1) and (`test`.`t10000`.`I` <> 0)); Using MRR
Warnings:
Note 1003 /* select#1 */ select `test`.`t10000`.`K` AS `K`,`test`.`t10000`.`I` AS `I`,`test`.`t10000`.`J` AS `J` from `test`.`t10000` where ((`test`.`t10000`.`J` <> 1) and (`test`.`t10000`.`I` <> 0))
DROP TABLE t10,t100,t10000;
set @is_enable = @is_enable_default;
set @is_enable = NULL;
# is_enable_on=1 is_enable_off=0
# ndb_index_stat_enable - before
show global variables like 'ndb_index_stat_enable';
Variable_name Value
ndb_index_stat_enable OFF
show local variables like 'ndb_index_stat_enable';
Variable_name Value
ndb_index_stat_enable OFF
set @@global.ndb_index_stat_enable = 1;
set @@local.ndb_index_stat_enable = 1;
# ndb_index_stat_enable - after
show global variables like 'ndb_index_stat_enable';
Variable_name Value
ndb_index_stat_enable ON
show local variables like 'ndb_index_stat_enable';
Variable_name Value
ndb_index_stat_enable ON
|
