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299 lines
12 KiB
Text
299 lines
12 KiB
Text
drop table if exists t1,t3;
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#
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# MDEV-20611: MRR scan over partitioned InnoDB table produces "Out of memory" error
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#
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create table t1(a int);
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insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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set @tmp=@@default_storage_engine;
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set default_storage_engine=myisam;
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create table t3 (
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ID bigint(20) NOT NULL AUTO_INCREMENT,
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part_id int,
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key_col int,
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col2 int,
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key(key_col),
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PRIMARY KEY (ID,part_id)
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) PARTITION BY RANGE (part_id)
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(PARTITION p1 VALUES LESS THAN (3),
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PARTITION p2 VALUES LESS THAN (7),
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PARTITION p3 VALUES LESS THAN (10)
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);
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show create table t3;
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Table Create Table
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t3 CREATE TABLE `t3` (
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`ID` bigint(20) NOT NULL AUTO_INCREMENT,
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`part_id` int(11) NOT NULL,
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`key_col` int(11) DEFAULT NULL,
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`col2` int(11) DEFAULT NULL,
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PRIMARY KEY (`ID`,`part_id`),
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KEY `key_col` (`key_col`)
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) ENGINE=MyISAM DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
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PARTITION BY RANGE (`part_id`)
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(PARTITION `p1` VALUES LESS THAN (3) ENGINE = MyISAM,
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PARTITION `p2` VALUES LESS THAN (7) ENGINE = MyISAM,
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PARTITION `p3` VALUES LESS THAN (10) ENGINE = MyISAM)
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set default_storage_engine= @tmp;
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insert into t3 select
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A.a+10*B.a,
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A.a,
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B.a,
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123456
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from t1 A, t1 B;
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set @save_optimizer_switch=@@optimizer_switch;
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set optimizer_switch='mrr=on';
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explain
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select * from t3 force index (key_col) where key_col < 3;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 range key_col key_col 5 NULL # Using where; Rowid-ordered scan
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select * from t3 force index (key_col) where key_col < 3;
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ID part_id key_col col2
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1 0 0 123456
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1 1 0 123456
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2 2 0 123456
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10 0 1 123456
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11 1 1 123456
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12 2 1 123456
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20 0 2 123456
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21 1 2 123456
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22 2 2 123456
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3 3 0 123456
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4 4 0 123456
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5 5 0 123456
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6 6 0 123456
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13 3 1 123456
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14 4 1 123456
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15 5 1 123456
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16 6 1 123456
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23 3 2 123456
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24 4 2 123456
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25 5 2 123456
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26 6 2 123456
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7 7 0 123456
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8 8 0 123456
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9 9 0 123456
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17 7 1 123456
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18 8 1 123456
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19 9 1 123456
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27 7 2 123456
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28 8 2 123456
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29 9 2 123456
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set optimizer_switch=@save_optimizer_switch;
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drop table t1,t3;
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#
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# MDEV-21544: partitioned table is joined with BKA+MRR
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#
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set @save_join_cache_level=@@join_cache_level;
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set @save_optimizer_switch=@@optimizer_switch;
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create table t0 (
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tp int, a int, b int not null, c varchar(12), index idx (a,b)
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);
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insert into t0 values
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(1,3,30,'yyzy'), (1,3,30,'yxxyy'), (1,3,30,'yyxy'), (1,3,30,'xxyy'),
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(1,3,30,'yyxz'), (1,3,30,'yyzz'), (1,3,30,'xxyzy'), (1,3,30,'yyyy'),
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(1,3,30,'yzzy'), (1,93,30,'zzzy'),
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(2,3,40,'yxx'), (2,4,40,'xx'), (2,3,10,'zxz'),
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(2,3,40,'yyx'), (2,4,40,'xxx'), (2,3,10,'zyyz'),
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(2,3,40,'xzzzz'), (2,4,40,'yyyxx'), (2,3,10,'zyz'),
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(2,3,40,'xxx'), (2,4,40,'xx'), (2,3,10,'zzz'),
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(2,3,40,'yyxzx'), (2,4,40,'xyx'), (2,3,10,'xzz'),
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(2,3,40,'xxxzz'), (2,4,40,'xxz'), (2,3,10,'zzzy'),
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(2,3,40,'zzxxx'), (2,4,40,'zxx'), (2,3,10,'yzzz'),
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(2,3,40,'xyyxx'), (2,4,40,'xzzzx'), (2,3,10,'zzxxz'),
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(2,3,40,'yzxxx'), (2,4,40,'xxzy'), (2,3,10,'zzzyx'),
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(2,93,40,'xzx'), (2,94,40,'xz'), (2,93,10,'zyyyz'),
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(3,4,30,'yx'), (3,4,30,'yyxxx'), (3,4,30,'zzyy'), (3,4,30,'zxyy'),
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(3,4,30,'xxyy'), (3,4,30,'yyzx'), (3,4,30,'zyyy'), (3,4,30,'yzy'),
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(3,4,30,'zzzyy'), (3,94,30,'yyz');
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create table t1 (
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tp int, a int, b int not null, c varchar(12), index idx (a,b)
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)
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partition by list (tp)
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( partition p1 values in (1),
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partition p2 values in (2),
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partition p3 values in (3));
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insert into t1 select * from t0;
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create table t2 (a int, index idx(a));
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insert into t2 values
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(1), (2), (3), (4), (5);
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insert into t2 select a+10 from t2;
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insert into t2 select a+20 from t2;
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analyze table t0,t1,t2;
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Table Op Msg_type Msg_text
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test.t0 analyze status Engine-independent statistics collected
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test.t0 analyze status OK
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status OK
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test.t2 analyze status Engine-independent statistics collected
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test.t2 analyze status OK
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set join_cache_level=6;
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set optimizer_switch='mrr=on';
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explain extended select * from t0,t2 where t2.a in (3,4) and t0.a=t2.a and (t0.b / 10) = t2.a-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 t2 range idx idx 5 NULL 2 100.00 Using where; Using index
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1 SIMPLE t0 ref idx idx 5 test.t2.a 12 100.00 Using index condition(BKA); Using join buffer (flat, BKA join); Rowid-ordered scan
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Warnings:
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Note 1003 select `test`.`t0`.`tp` AS `tp`,`test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t0`.`c` AS `c`,`test`.`t2`.`a` AS `a` from `test`.`t0` join `test`.`t2` where `test`.`t0`.`a` = `test`.`t2`.`a` and `test`.`t2`.`a` in (3,4) and `test`.`t0`.`b` / 10 = `test`.`t2`.`a` - 1
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select * from t0,t2 where t2.a in (3,4) and t0.a=t2.a and (t0.b / 10) = t2.a-1;
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tp a b c a
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3 4 30 yx 4
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3 4 30 yyxxx 4
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3 4 30 zzyy 4
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3 4 30 zxyy 4
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3 4 30 xxyy 4
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3 4 30 yyzx 4
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3 4 30 zyyy 4
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3 4 30 yzy 4
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3 4 30 zzzyy 4
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explain extended select * from t1,t2 where t2.a in (3,4) and t1.a=t2.a and (t1.b / 10) = t2.a-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 t2 range idx idx 5 NULL 2 100.00 Using where; Using index
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1 SIMPLE t1 ref idx idx 5 test.t2.a 12 100.00 Using index condition(BKA); Using join buffer (flat, BKA join); Rowid-ordered scan
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Warnings:
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Note 1003 select `test`.`t1`.`tp` AS `tp`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c`,`test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a` = `test`.`t2`.`a` and `test`.`t2`.`a` in (3,4) and `test`.`t1`.`b` / 10 = `test`.`t2`.`a` - 1
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select * from t1,t2 where t2.a in (3,4) and t1.a=t2.a and (t1.b / 10) = t2.a-1;
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tp a b c a
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3 4 30 yx 4
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3 4 30 yyxxx 4
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3 4 30 zzyy 4
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3 4 30 zxyy 4
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3 4 30 xxyy 4
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3 4 30 yyzx 4
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3 4 30 zyyy 4
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3 4 30 yzy 4
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3 4 30 zzzyy 4
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explain extended select * from t0,t2 where t2.a in (3,4) and t0.a=t2.a and (t0.b / 10) = 4;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 range idx idx 5 NULL 2 100.00 Using where; Using index
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1 SIMPLE t0 ref idx idx 5 test.t2.a 12 100.00 Using index condition; Using join buffer (flat, BKA join); Rowid-ordered scan
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Warnings:
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Note 1003 select `test`.`t0`.`tp` AS `tp`,`test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t0`.`c` AS `c`,`test`.`t2`.`a` AS `a` from `test`.`t0` join `test`.`t2` where `test`.`t0`.`a` = `test`.`t2`.`a` and `test`.`t2`.`a` in (3,4) and `test`.`t0`.`b` / 10 = 4
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select * from t0,t2 where t2.a in (3,4) and t0.a=t2.a and (t0.b / 10) = 4;
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tp a b c a
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2 3 40 yxx 3
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2 4 40 xx 4
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2 3 40 yyx 3
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2 4 40 xxx 4
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2 3 40 xzzzz 3
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2 4 40 yyyxx 4
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2 3 40 xxx 3
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2 4 40 xx 4
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2 3 40 yyxzx 3
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2 4 40 xyx 4
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2 3 40 xxxzz 3
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2 4 40 xxz 4
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2 3 40 zzxxx 3
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2 4 40 zxx 4
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2 3 40 xyyxx 3
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2 4 40 xzzzx 4
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2 3 40 yzxxx 3
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2 4 40 xxzy 4
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explain extended select * from t1,t2 where t2.a in (3,4) and t1.a=t2.a and (t1.b / 10) = 4;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 range idx idx 5 NULL 2 100.00 Using where; Using index
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1 SIMPLE t1 ref idx idx 5 test.t2.a 12 100.00 Using index condition(BKA); Using join buffer (flat, BKA join); Rowid-ordered scan
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Warnings:
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Note 1003 select `test`.`t1`.`tp` AS `tp`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c`,`test`.`t2`.`a` AS `a` from `test`.`t1` join `test`.`t2` where `test`.`t1`.`a` = `test`.`t2`.`a` and `test`.`t2`.`a` in (3,4) and `test`.`t1`.`b` / 10 = 4
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select * from t1,t2 where t2.a in (3,4) and t1.a=t2.a and (t1.b / 10) = 4;
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tp a b c a
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2 3 40 yxx 3
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2 4 40 xx 4
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2 3 40 yyx 3
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2 4 40 xxx 4
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2 3 40 xzzzz 3
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2 4 40 yyyxx 4
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2 3 40 xxx 3
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2 4 40 xx 4
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2 3 40 yyxzx 3
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2 4 40 xyx 4
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2 3 40 xxxzz 3
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2 4 40 xxz 4
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2 3 40 zzxxx 3
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2 4 40 zxx 4
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2 3 40 xyyxx 3
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2 4 40 xzzzx 4
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2 3 40 yzxxx 3
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2 4 40 xxzy 4
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insert into t2 values
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(3), (4), (5);
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analyze table t2;
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Table Op Msg_type Msg_text
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test.t2 analyze status Engine-independent statistics collected
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test.t2 analyze status OK
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explain extended select * from t2 left join t0 on t2.a=t0.a where t2.a in (3,4) and t0.b is null;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 range idx idx 5 NULL 4 100.00 Using where; Using index
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1 SIMPLE t0 ref idx idx 5 test.t2.a 12 100.00 Using where; Not exists; Using join buffer (flat, BKA join); Rowid-ordered scan
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Warnings:
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Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t0`.`tp` AS `tp`,`test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t0`.`c` AS `c` from `test`.`t2` left join `test`.`t0` on(`test`.`t0`.`a` = `test`.`t2`.`a` and `test`.`t2`.`a` is not null) where `test`.`t2`.`a` in (3,4) and `test`.`t0`.`b` is null
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select * from t2 left join t0 on t2.a=t0.a where t2.a in (3,4) and t0.b is null;
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a tp a b c
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explain extended select * from t2 left join t1 on t2.a=t1.a where t2.a in (3,4) and t1.b is null;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t2 range idx idx 5 NULL 4 100.00 Using where; Using index
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1 SIMPLE t1 ref idx idx 5 test.t2.a 12 100.00 Using where; Not exists; Using join buffer (flat, BKA join); Rowid-ordered scan
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Warnings:
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Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t1`.`tp` AS `tp`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t1`.`c` AS `c` from `test`.`t2` left join `test`.`t1` on(`test`.`t1`.`a` = `test`.`t2`.`a` and `test`.`t2`.`a` is not null) where `test`.`t2`.`a` in (3,4) and `test`.`t1`.`b` is null
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select * from t2 left join t1 on t2.a=t1.a where t2.a in (3,4) and t1.b is null;
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a tp a b c
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set join_cache_level=@save_join_cache_level;
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set optimizer_switch=@save_optimizer_switch;
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drop table t0,t1,t2;
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#
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# MDEV-21628: Index condition pushdown for a simple condition over
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# index fields is not used for ref access of partitioned tables when employing BKA
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#
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create table t0 (
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tp int, a int, b int, c varchar(12), index idx (a,b)
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);
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insert into t0 values
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(1,3,30,'yyzy'), (1,3,30,'yxxyy'), (1,3,30,'yyxy'), (1,3,30,'xxyy'),
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(1,3,30,'yyxz'), (1,3,30,'yyzz'), (1,3,30,'xxyzy'), (1,3,30,'yyyy'),
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(1,3,30,'yzzy'), (1,93,30,'zzzy'),
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(2,3,40,'yxx'), (2,4,40,'xx'), (2,3,10,'zxz'),
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(2,3,40,'yyx'), (2,4,40,'xxx'), (2,3,10,'zyyz'),
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(2,3,40,'xzzzz'), (2,4,40,'yyyxx'), (2,3,10,'zyz'),
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(2,3,40,'xxx'), (2,4,40,'xx'), (2,3,10,'zzz'),
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(2,3,40,'yyxzx'), (2,4,40,'xyx'), (2,3,10,'xzz'),
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(2,3,40,'xxxzz'), (2,4,40,'xxz'), (2,3,10,'zzzy'),
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(2,3,40,'zzxxx'), (2,4,40,'zxx'), (2,3,10,'yzzz'),
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(2,3,40,'xyyxx'), (2,4,40,'xzzzx'), (2,3,10,'zzxxz'),
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(2,3,40,'yzxxx'), (2,4,40,'xxzy'), (2,3,10,'zzzyx'),
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(2,93,40,'xzx'), (2,94,40,'xz'), (2,93,10,'zyyyz'),
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(3,4,30,'yx'), (3,4,30,'yyxxx'), (3,4,30,'zzyy'), (3,4,30,'zxyy'),
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(3,4,30,'xxyy'), (3,4,30,'yyzx'), (3,4,30,'zyyy'), (3,4,30,'yzy'),
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(3,4,30,'zzzyy'), (3,94,30,'yyz');
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create table t1 (
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tp int, a int, b int, c varchar(12), index idx (a,b)
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) engine=myisam
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partition by list (tp)
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( partition p1 values in (1),
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partition p2 values in (2),
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partition p3 values in (3));
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insert into t1 select * from t0;
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create table t2 (a int, index idx(a)) engine=myisam;
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insert into t2 values (1), (2), (3), (4), (5);
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insert into t2 select a+10 from t2;
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insert into t2 select a+20 from t2;
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analyze table t0,t1,t2;
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Table Op Msg_type Msg_text
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test.t0 analyze status Engine-independent statistics collected
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test.t0 analyze status OK
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status OK
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test.t2 analyze status Engine-independent statistics collected
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test.t2 analyze status OK
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set @tmp1=@@join_cache_level, @tmp2=@@optimizer_switch;
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set join_cache_level=6, optimizer_switch='mrr=on';
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explain
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select * from t0,t2 where t2.a in (3,4) and t0.a=t2.a and (t0.b / 10) = 4;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 range idx idx 5 NULL 2 Using where; Using index
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1 SIMPLE t0 ref idx idx 5 test.t2.a 12 Using index condition; Using join buffer (flat, BKA join); Rowid-ordered scan
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# This will use "Using index condition(BKA)"
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explain
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select * from t1,t2 where t2.a in (3,4) and t1.a=t2.a and (t1.b / 10) = 4;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 range idx idx 5 NULL 2 Using where; Using index
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1 SIMPLE t1 ref idx idx 5 test.t2.a 12 Using index condition(BKA); Using join buffer (flat, BKA join); Rowid-ordered scan
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set join_cache_level=@tmp1, optimizer_switch=@tmp2;
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drop table t0,t1,t2;
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