127 lines
8.8 KiB
Plaintext
127 lines
8.8 KiB
Plaintext
use test;
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drop table if exists t;
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create table t (a int, b int, c timestamp, index idx(a));
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set @@tidb_enable_window_function = 1;
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set @@session.tidb_window_concurrency = 1;
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explain format = 'brief' select sum(a) over() from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over()
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└─IndexReader 10000.00 root index:IndexFullScan
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└─IndexFullScan 10000.00 cop[tikv] table:t, index:idx(a) keep order:false, stats:pseudo
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explain format = 'brief' select sum(a) over(partition by a) from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over(partition by test.t.a)
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└─IndexReader 10000.00 root index:IndexFullScan
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└─IndexFullScan 10000.00 cop[tikv] table:t, index:idx(a) keep order:true, stats:pseudo
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explain format = 'brief' select sum(a) over(partition by a order by b) from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over(partition by test.t.a order by test.t.b range between unbounded preceding and current row)
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└─Sort 10000.00 root test.t.a, test.t.b
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└─TableReader 10000.00 root data:TableFullScan
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└─TableFullScan 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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explain format = 'brief' select sum(a) over(partition by a order by b rows unbounded preceding) from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over(partition by test.t.a order by test.t.b rows between unbounded preceding and current row)
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└─Sort 10000.00 root test.t.a, test.t.b
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└─TableReader 10000.00 root data:TableFullScan
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└─TableFullScan 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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explain format = 'brief' select sum(a) over(partition by a order by b rows between 1 preceding and 1 following) from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over(partition by test.t.a order by test.t.b rows between 1 preceding and 1 following)
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└─Sort 10000.00 root test.t.a, test.t.b
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└─TableReader 10000.00 root data:TableFullScan
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└─TableFullScan 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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explain format = 'brief' select sum(a) over(partition by a order by b range between 1 preceding and 1 following) from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over(partition by test.t.a order by test.t.b range between 1 preceding and 1 following)
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└─Sort 10000.00 root test.t.a, test.t.b
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└─TableReader 10000.00 root data:TableFullScan
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└─TableFullScan 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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explain format = 'brief' select sum(a) over(partition by a order by c range between interval '2:30' minute_second preceding and interval '2:30' minute_second following) from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over(partition by test.t.a order by test.t.c range between interval "2:30" "MINUTE_SECOND" preceding and interval "2:30" "MINUTE_SECOND" following)
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└─Sort 10000.00 root test.t.a, test.t.c
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└─TableReader 10000.00 root data:TableFullScan
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└─TableFullScan 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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set @@session.tidb_window_concurrency = 4;
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explain format = 'brief' select sum(a) over() from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over()
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└─IndexReader 10000.00 root index:IndexFullScan
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└─IndexFullScan 10000.00 cop[tikv] table:t, index:idx(a) keep order:false, stats:pseudo
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explain format = 'brief' select sum(a) over(partition by a) from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over(partition by test.t.a)
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└─IndexReader 10000.00 root index:IndexFullScan
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└─IndexFullScan 10000.00 cop[tikv] table:t, index:idx(a) keep order:true, stats:pseudo
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explain format = 'brief' select sum(a) over(partition by a order by b) from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Shuffle 10000.00 root execution info: concurrency:4, data sources:[TableReader]
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over(partition by test.t.a order by test.t.b range between unbounded preceding and current row)
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└─Sort 10000.00 root test.t.a, test.t.b
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└─TableReader 10000.00 root data:TableFullScan
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└─TableFullScan 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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explain format = 'brief' select sum(a) over(partition by a order by b rows unbounded preceding) from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Shuffle 10000.00 root execution info: concurrency:4, data sources:[TableReader]
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over(partition by test.t.a order by test.t.b rows between unbounded preceding and current row)
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└─Sort 10000.00 root test.t.a, test.t.b
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└─TableReader 10000.00 root data:TableFullScan
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└─TableFullScan 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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explain format = 'brief' select sum(a) over(partition by a order by b rows between 1 preceding and 1 following) from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Shuffle 10000.00 root execution info: concurrency:4, data sources:[TableReader]
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over(partition by test.t.a order by test.t.b rows between 1 preceding and 1 following)
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└─Sort 10000.00 root test.t.a, test.t.b
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└─TableReader 10000.00 root data:TableFullScan
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└─TableFullScan 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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explain format = 'brief' select sum(a) over(partition by a order by b range between 1 preceding and 1 following) from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Shuffle 10000.00 root execution info: concurrency:4, data sources:[TableReader]
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over(partition by test.t.a order by test.t.b range between 1 preceding and 1 following)
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└─Sort 10000.00 root test.t.a, test.t.b
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└─TableReader 10000.00 root data:TableFullScan
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└─TableFullScan 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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explain format = 'brief' select sum(a) over(partition by a order by c range between interval '2:30' minute_second preceding and interval '2:30' minute_second following) from t;
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id estRows task access object operator info
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Projection 10000.00 root Column#6
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└─Shuffle 10000.00 root execution info: concurrency:4, data sources:[TableReader]
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└─Window 10000.00 root sum(cast(test.t.a, decimal(32,0) BINARY))->Column#6 over(partition by test.t.a order by test.t.c range between interval "2:30" "MINUTE_SECOND" preceding and interval "2:30" "MINUTE_SECOND" following)
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└─Sort 10000.00 root test.t.a, test.t.c
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└─TableReader 10000.00 root data:TableFullScan
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└─TableFullScan 10000.00 cop[tikv] table:t keep order:false, stats:pseudo
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drop table if exists t1;
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create table t1(a int primary key, b int);
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insert into t1 values(1, 1), (2, 1);
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analyze table t1;
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explain format = 'brief' select sum(a) over(partition by b) from t1;
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id estRows task access object operator info
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Projection 2.00 root Column#4
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└─Window 2.00 root sum(cast(test.t1.a, decimal(32,0) BINARY))->Column#4 over(partition by test.t1.b)
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└─Sort 2.00 root test.t1.b
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└─TableReader 2.00 root data:TableFullScan
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└─TableFullScan 2.00 cop[tikv] table:t1 keep order:false
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insert into t1 values(3, 3);
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analyze table t1;
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explain format = 'brief' select sum(a) over(partition by b) from t1;
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id estRows task access object operator info
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Projection 3.00 root Column#4
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└─Shuffle 3.00 root execution info: concurrency:2, data sources:[TableReader]
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└─Window 3.00 root sum(cast(test.t1.a, decimal(32,0) BINARY))->Column#4 over(partition by test.t1.b)
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└─Sort 3.00 root test.t1.b
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└─TableReader 3.00 root data:TableFullScan
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└─TableFullScan 3.00 cop[tikv] table:t1 keep order:false
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