339 lines
10 KiB
Plaintext
339 lines
10 KiB
Plaintext
drop table if exists t1, t2, t3, t4;
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create table t1 (id1 int ,id2 char(10) ,id3 text,id4 blob,id5 json,id6 varchar(1000),id7 varchar(1001), PRIMARY KEY (`id1`) clustered,key id2(id2));
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insert into t1 (id1,id2)values(1,1);
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insert into t1 (id1,id2)values(2,2),(3,3);
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create table t2 (id1 int ,id2 char(10) ,id3 text,id4 blob,id5 json,id6 varchar(1000),PRIMARY KEY (`id1`) clustered,key id2(id2));
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insert into t2 (id1,id2)values(1,1);
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insert into t2 (id1,id2)values(2,2),(3,3);
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explain format='brief' select t1.id1 from t1,t2 where t1.id2 > '1' and t2.id2 > '1';
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id estRows task access object operator info
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HashJoin 11111111.11 root CARTESIAN inner join
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├─IndexReader(Build) 3333.33 root index:IndexRangeScan
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│ └─IndexRangeScan 3333.33 cop[tikv] table:t2, index:id2(id2) range:("1",+inf], keep order:false, stats:pseudo
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└─IndexReader(Probe) 3333.33 root index:IndexRangeScan
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└─IndexRangeScan 3333.33 cop[tikv] table:t1, index:id2(id2) range:("1",+inf], keep order:false, stats:pseudo
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select t1.id1 from t1,t2 where t1.id2 > '1' and t2.id2 > '1';
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id1
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2
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2
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3
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3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select t1.id1,t1.id2 from t1,t2 where t1.id2 > '1' and t2.id2 > '1' ;
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id1 id2
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2 2
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2 2
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3 3
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3 3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select t1.id1,t1.id3 from t1,t2 where t1.id2 > '1' and t2.id2 > '1' ;
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id1 id3
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2 NULL
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2 NULL
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3 NULL
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3 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1,t1.id4 from t1,t2 where t1.id2 > '1' and t2.id2 > '1' ;
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id1 id4
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2 NULL
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2 NULL
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3 NULL
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3 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1,t1.id5 from t1,t2 where t1.id2 > '1' and t2.id2 > '1' ;
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id1 id5
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2 NULL
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2 NULL
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3 NULL
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3 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1,t1.id6 from t1,t2 where t1.id2 > '1' and t2.id2 > '1' ;
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id1 id6
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2 NULL
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2 NULL
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3 NULL
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3 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select t1.id1,t1.id7 from t1,t2 where t1.id2 > '1' and t2.id2 > '1' ;
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id1 id7
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2 NULL
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2 NULL
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3 NULL
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3 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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explain format='brief' select t1.id1 from t1,t2 where t1.id2 > '1'and t1.id1 = t2.id1;
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id estRows task access object operator info
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MergeJoin 4166.67 root inner join, left key:executor__chunk_reuse.t1.id1, right key:executor__chunk_reuse.t2.id1
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├─TableReader(Build) 10000.00 root data:TableFullScan
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│ └─TableFullScan 10000.00 cop[tikv] table:t2 keep order:true, stats:pseudo
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└─TableReader(Probe) 3333.33 root data:Selection
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└─Selection 3333.33 cop[tikv] gt(executor__chunk_reuse.t1.id2, "1")
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└─TableFullScan 10000.00 cop[tikv] table:t1 keep order:true, stats:pseudo
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select t1.id1 from t1,t2 where t1.id2 > '1' and t1.id1 = t2.id1;
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id1
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2
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3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select t1.id1 ,t1.id3 from t1,t2 where t1.id2 > '1' and t1.id1 = t2.id1;
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id1 id3
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2 NULL
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3 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1 ,t1.id4 from t1,t2 where t1.id2 > '1' and t1.id1 = t2.id1;
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id1 id4
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2 NULL
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3 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1 ,t1.id5 from t1,t2 where t1.id2 > '1' and t1.id1 = t2.id1;
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id1 id5
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2 NULL
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3 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1 ,t1.id6 from t1,t2 where t1.id2 > '1' and t1.id1 = t2.id1;
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id1 id6
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2 NULL
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3 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select t1.id1 ,t1.id7 from t1,t2 where t1.id2 > '1' and t1.id1 = t2.id1;
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id1 id7
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2 NULL
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3 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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explain format='brief' select t1.id1 from t1,t2 where t1.id1 = 1 and t2.id1 = 1;
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id estRows task access object operator info
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HashJoin 1.00 root CARTESIAN inner join
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├─Point_Get(Build) 1.00 root table:t2 handle:1
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└─Point_Get(Probe) 1.00 root table:t1 handle:1
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select t1.id1 from t1,t2 where t1.id1 = 1 and t2.id1 = 1;
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id1
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1
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select t1.id1,t1.id2 from t1,t2 where t1.id1 = 1 and t2.id1 = 1 ;
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id1 id2
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1 1
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select t1.id1,t1.id3 from t1,t2 where t1.id1 = 1 and t2.id1 = 1 ;
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id1 id3
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1 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1,t1.id4 from t1,t2 where t1.id1 = 1 and t2.id1 = 1 ;
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id1 id4
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1 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1,t1.id5 from t1,t2 where t1.id1 = 1 and t2.id1 = 1 ;
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id1 id5
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1 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1,t1.id6 from t1,t2 where t1.id1 = 1 and t2.id1 = 1 ;
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id1 id6
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1 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select t1.id1,t1.id7 from t1,t2 where t1.id1 = 1 and t2.id1 = 1 ;
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id1 id7
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1 NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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explain format='brief' select t1.id1,t1.id6 ,t2.id6 from t1 join t2 on t1.id2 = '1' and t2.id2 = '2' ;
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id estRows task access object operator info
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HashJoin 100.00 root CARTESIAN inner join
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├─IndexLookUp(Build) 10.00 root
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│ ├─IndexRangeScan(Build) 10.00 cop[tikv] table:t2, index:id2(id2) range:["2","2"], keep order:false, stats:pseudo
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│ └─TableRowIDScan(Probe) 10.00 cop[tikv] table:t2 keep order:false, stats:pseudo
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└─IndexLookUp(Probe) 10.00 root
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├─IndexRangeScan(Build) 10.00 cop[tikv] table:t1, index:id2(id2) range:["1","1"], keep order:false, stats:pseudo
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└─TableRowIDScan(Probe) 10.00 cop[tikv] table:t1 keep order:false, stats:pseudo
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select t1.id1,t1.id6 ,t2.id6 from t1 join t2 on t1.id2 = '1' and t2.id2 = '2';
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id1 id6 id6
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1 NULL NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select t1.id1,t1.id3 ,t2.id6 from t1 join t2 on t1.id2 = '1' and t2.id2 = '2';
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id1 id3 id6
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1 NULL NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1,t1.id4 ,t2.id6 from t1 join t2 on t1.id2 = '1' and t2.id2 = '2';
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id1 id4 id6
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1 NULL NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1,t1.id5 ,t2.id6 from t1 join t2 on t1.id2 = '1' and t2.id2 = '2';
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id1 id5 id6
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1 NULL NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1,t1.id7 ,t2.id6 from t1 join t2 on t1.id2 = '1' and t2.id2 = '2';
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id1 id7 id6
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1 NULL NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select t1.id1,t1.id6 ,t2.id3 from t1 join t2 on t1.id2 = '1' and t2.id2 = '2';
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id1 id6 id3
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1 NULL NULL
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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create table t3 (id1 int ,id2 char(10),id8 int ,id3 text,id4 blob,id5 json,id6 varchar(1000),id7 varchar(1001), PRIMARY KEY (`id1`) clustered,key id2(id2),key id8(id8));
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insert into t3 (id1,id2,id8)values(1,1,1),(2,2,2),(3,3,3);
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explain format='brief' select id1 from t3 where id2 > '3' or id8 < 10 union (select id1 from t3 where id2 > '4' or id8 < 7);
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id estRows task access object operator info
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HashAgg 8878.22 root group by:Column#17, funcs:firstrow(Column#17)->Column#17
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└─Union 11097.78 root
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├─Projection 5548.89 root executor__chunk_reuse.t3.id1->Column#17
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│ └─IndexMerge 5548.89 root type: union
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│ ├─IndexRangeScan(Build) 3333.33 cop[tikv] table:t3, index:id2(id2) range:("3",+inf], keep order:false, stats:pseudo
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│ ├─IndexRangeScan(Build) 3323.33 cop[tikv] table:t3, index:id8(id8) range:[-inf,10), keep order:false, stats:pseudo
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│ └─TableRowIDScan(Probe) 5548.89 cop[tikv] table:t3 keep order:false, stats:pseudo
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└─Projection 5548.89 root executor__chunk_reuse.t3.id1->Column#17
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└─IndexMerge 5548.89 root type: union
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├─IndexRangeScan(Build) 3333.33 cop[tikv] table:t3, index:id2(id2) range:("4",+inf], keep order:false, stats:pseudo
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├─IndexRangeScan(Build) 3323.33 cop[tikv] table:t3, index:id8(id8) range:[-inf,7), keep order:false, stats:pseudo
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└─TableRowIDScan(Probe) 5548.89 cop[tikv] table:t3 keep order:false, stats:pseudo
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select id1 from t3 where id2 > '3' or id8 < 10 union (select id1 from t3 where id2 > '4' or id8 < 7);
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id1
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1
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2
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3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select id1 from t3 where id2 > '3' or id8 < 10 union (select id3 from t3 where id2 > '4' or id8 < 7);
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id1
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NULL
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1
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2
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3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select id1 from t3 where id2 > '3' or id8 < 10 union (select id4 from t3 where id2 > '4' or id8 < 7);
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id1
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NULL
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1
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2
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3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select id1 from t3 where id2 > '3' or id8 < 10 union (select id5 from t3 where id2 > '4' or id8 < 7);
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id1
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NULL
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1
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2
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3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select id1 from t3 where id2 > '3' or id8 < 10 union (select id6 from t3 where id2 > '4' or id8 < 7);
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id1
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NULL
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1
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2
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3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select id1 from t3 where id2 > '3' or id8 < 10 union (select id7 from t3 where id2 > '4' or id8 < 7);
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id1
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NULL
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1
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2
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3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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set tidb_enable_clustered_index = OFF;
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create table t4 (id1 int ,id2 char(10),id8 int ,id3 text,id4 blob,id5 json,id6 varchar(1000),id7 varchar(1001), PRIMARY KEY (`id1`),key id2(id2),key id8(id8,id2));
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insert into t4 (id1,id2,id8)values(1,1,1),(2,2,2),(3,3,3);
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explain format='brief' select id2 from t4 where id2 > '3' union (select id2 from t4 where id2 > '4');
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id estRows task access object operator info
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HashAgg 5333.33 root group by:Column#19, funcs:firstrow(Column#19)->Column#19
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└─Union 6666.67 root
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├─IndexReader 3333.33 root index:IndexRangeScan
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│ └─IndexRangeScan 3333.33 cop[tikv] table:t4, index:id2(id2) range:("3",+inf], keep order:false, stats:pseudo
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└─IndexReader 3333.33 root index:IndexRangeScan
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└─IndexRangeScan 3333.33 cop[tikv] table:t4, index:id2(id2) range:("4",+inf], keep order:false, stats:pseudo
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select id2 from t4 where id2 > '3' union (select id2 from t4 where id2 > '4');
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id2
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select id1 from t3 where id2 > '3' or id8 < 10 union (select CHAR_LENGTH(id3) from t3 where id2 > '4' or id8 < 7);
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id1
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NULL
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1
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2
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3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select id1 from t3 where id2 > '3' or id8 < 10 union (select CHAR_LENGTH(id2) from t3 where id2 > '4' or id8 < 7);
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id1
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1
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2
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3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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1
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select id1 from t3 where id2 > '3' or id8 < 10 union (select id2 from t3 where id2 > '4' or id8 < 7 and id3 is null);
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id1
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1
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2
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3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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select id1 from t3 where id2 > '3' or id8 < 10 union (select id2 from t3 where id2 > '4' or id8 < 7 and char_length(id3) > 0);
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id1
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1
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2
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3
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select @@last_sql_use_alloc;
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@@last_sql_use_alloc
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0
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set tidb_enable_clustered_index = default;
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