163 lines
8.3 KiB
Go
163 lines
8.3 KiB
Go
// Copyright 2018 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package executor_test
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import (
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"context"
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. "github.com/pingcap/check"
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"github.com/pingcap/tidb/util/testkit"
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)
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func (s *testSuite1) TestIndexLookupJoinHang(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec("create table idxJoinOuter (a int unsigned)")
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tk.MustExec("create table idxJoinInner (a int unsigned unique)")
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tk.MustExec("insert idxJoinOuter values (1), (1), (1), (1), (1)")
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tk.MustExec("insert idxJoinInner values (1)")
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tk.Se.GetSessionVars().IndexJoinBatchSize = 1
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tk.Se.GetSessionVars().IndexLookupJoinConcurrency = 1
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rs, err := tk.Exec("select /*+ TIDB_INLJ(i)*/ * from idxJoinOuter o left join idxJoinInner i on o.a = i.a where o.a in (1, 2) and (i.a - 3) > 0")
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c.Assert(err, IsNil)
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req := rs.NewChunk()
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for i := 0; i < 5; i++ {
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rs.Next(context.Background(), req)
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}
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rs.Close()
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}
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func (s *testSuite1) TestIndexJoinUnionScan(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec("create table t1(id int primary key, a int)")
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tk.MustExec("create table t2(id int primary key, a int, b int, key idx_a(a))")
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tk.MustExec("insert into t2 values (1,1,1),(4,2,4)")
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tk.MustExec("begin")
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tk.MustExec("insert into t1 values(2,2)")
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tk.MustExec("insert into t2 values(2,2,2), (3,3,3)")
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// TableScan below UnionScan
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tk.MustQuery("explain select /*+ TIDB_INLJ(t1, t2)*/ * from t1 join t2 on t1.a = t2.id").Check(testkit.Rows(
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"IndexJoin_11 12487.50 root inner join, inner:UnionScan_10, outer key:test.t1.a, inner key:test.t2.id",
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"├─UnionScan_12 9990.00 root not(isnull(test.t1.a))",
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"│ └─TableReader_15 9990.00 root data:Selection_14",
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"│ └─Selection_14 9990.00 cop not(isnull(test.t1.a))",
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"│ └─TableScan_13 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─UnionScan_10 1.00 root ",
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" └─TableReader_9 1.00 root data:TableScan_8",
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" └─TableScan_8 1.00 cop table:t2, range: decided by [test.t1.a], keep order:false, stats:pseudo",
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))
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tk.MustQuery("select /*+ TIDB_INLJ(t1, t2)*/ * from t1 join t2 on t1.a = t2.id").Check(testkit.Rows(
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"2 2 2 2 2",
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))
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// IndexLookUp below UnionScan
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tk.MustQuery("explain select /*+ TIDB_INLJ(t1, t2)*/ * from t1 join t2 on t1.a = t2.a").Check(testkit.Rows(
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"IndexJoin_13 12487.50 root inner join, inner:UnionScan_12, outer key:test.t1.a, inner key:test.t2.a",
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"├─UnionScan_14 9990.00 root not(isnull(test.t1.a))",
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"│ └─TableReader_17 9990.00 root data:Selection_16",
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"│ └─Selection_16 9990.00 cop not(isnull(test.t1.a))",
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"│ └─TableScan_15 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─UnionScan_12 9.99 root not(isnull(test.t2.a))",
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" └─IndexLookUp_11 9.99 root ",
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" ├─Selection_10 9.99 cop not(isnull(test.t2.a))",
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" │ └─IndexScan_8 10.00 cop table:t2, index:a, range: decided by [eq(test.t2.a, test.t1.a)], keep order:false, stats:pseudo",
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" └─TableScan_9 9.99 cop table:t2, keep order:false, stats:pseudo",
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))
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tk.MustQuery("select /*+ TIDB_INLJ(t1, t2)*/ * from t1 join t2 on t1.a = t2.a").Check(testkit.Rows(
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"2 2 2 2 2",
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"2 2 4 2 4",
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))
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// IndexScan below UnionScan
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tk.MustQuery("explain select /*+ TIDB_INLJ(t1, t2)*/ t1.a, t2.a from t1 join t2 on t1.a = t2.a").Check(testkit.Rows(
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"Projection_7 12487.50 root test.t1.a, test.t2.a",
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"└─IndexJoin_12 12487.50 root inner join, inner:UnionScan_11, outer key:test.t1.a, inner key:test.t2.a",
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" ├─UnionScan_13 9990.00 root not(isnull(test.t1.a))",
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" │ └─TableReader_16 9990.00 root data:Selection_15",
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" │ └─Selection_15 9990.00 cop not(isnull(test.t1.a))",
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" │ └─TableScan_14 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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" └─UnionScan_11 9.99 root not(isnull(test.t2.a))",
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" └─IndexReader_10 9.99 root index:Selection_9",
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" └─Selection_9 9.99 cop not(isnull(test.t2.a))",
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" └─IndexScan_8 10.00 cop table:t2, index:a, range: decided by [eq(test.t2.a, test.t1.a)], keep order:false, stats:pseudo",
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))
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tk.MustQuery("select /*+ TIDB_INLJ(t1, t2)*/ t1.a, t2.a from t1 join t2 on t1.a = t2.a").Check(testkit.Rows(
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"2 2",
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"2 2",
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))
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tk.MustExec("rollback")
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}
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func (s *testSuite1) TestBatchIndexJoinUnionScan(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec("create table t1(id int primary key, a int)")
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tk.MustExec("create table t2(id int primary key, a int, key idx_a(a))")
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tk.MustExec("set @@session.tidb_init_chunk_size=1")
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tk.MustExec("set @@session.tidb_index_join_batch_size=1")
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tk.MustExec("set @@session.tidb_index_lookup_join_concurrency=4")
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tk.MustExec("begin")
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tk.MustExec("insert into t1 values(1,1),(2,1),(3,1),(4,1)")
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tk.MustExec("insert into t2 values(1,1)")
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tk.MustQuery("explain select /*+ TIDB_INLJ(t1, t2)*/ count(*) from t1 join t2 on t1.a = t2.a").Check(testkit.Rows(
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"StreamAgg_13 1.00 root funcs:count(1)",
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"└─IndexJoin_27 12487.50 root inner join, inner:UnionScan_26, outer key:test.t1.a, inner key:test.t2.a",
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" ├─UnionScan_19 9990.00 root not(isnull(test.t1.a))",
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" │ └─TableReader_22 9990.00 root data:Selection_21",
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" │ └─Selection_21 9990.00 cop not(isnull(test.t1.a))",
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" │ └─TableScan_20 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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" └─UnionScan_26 9.99 root not(isnull(test.t2.a))",
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" └─IndexReader_25 9.99 root index:Selection_24",
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" └─Selection_24 9.99 cop not(isnull(test.t2.a))",
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" └─IndexScan_23 10.00 cop table:t2, index:a, range: decided by [eq(test.t2.a, test.t1.a)], keep order:false, stats:pseudo",
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))
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tk.MustQuery("select /*+ TIDB_INLJ(t1, t2)*/ count(*) from t1 join t2 on t1.a = t2.id").Check(testkit.Rows(
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"4",
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))
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tk.MustExec("rollback")
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}
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func (s *testSuite1) TestInapplicableIndexJoinHint(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec(`drop table if exists t1, t2;`)
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tk.MustExec(`create table t1(a bigint, b bigint);`)
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tk.MustExec(`create table t2(a bigint, b bigint);`)
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tk.MustQuery(`select /*+ TIDB_INLJ(t1, t2) */ * from t1, t2;`).Check(testkit.Rows())
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tk.MustQuery(`show warnings;`).Check(testkit.Rows(`Warning 1815 Optimizer Hint /*+ TIDB_INLJ(t1, t2) */ is inapplicable without column equal ON condition`))
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tk.MustQuery(`select /*+ TIDB_INLJ(t1, t2) */ * from t1 join t2 on t1.a=t2.a;`).Check(testkit.Rows())
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tk.MustQuery(`show warnings;`).Check(testkit.Rows(`Warning 1815 Optimizer Hint /*+ TIDB_INLJ(t1, t2) */ is inapplicable`))
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tk.MustExec(`drop table if exists t1, t2;`)
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tk.MustExec(`create table t1(a bigint, b bigint, index idx_a(a));`)
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tk.MustExec(`create table t2(a bigint, b bigint);`)
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tk.MustQuery(`select /*+ TIDB_INLJ(t1) */ * from t1 left join t2 on t1.a=t2.a;`).Check(testkit.Rows())
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tk.MustQuery(`show warnings;`).Check(testkit.Rows(`Warning 1815 Optimizer Hint /*+ TIDB_INLJ(t1) */ is inapplicable`))
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tk.MustQuery(`select /*+ TIDB_INLJ(t2) */ * from t1 right join t2 on t1.a=t2.a;`).Check(testkit.Rows())
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tk.MustQuery(`show warnings;`).Check(testkit.Rows(`Warning 1815 Optimizer Hint /*+ TIDB_INLJ(t2) */ is inapplicable`))
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}
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func (s *testSuite) TestIndexJoinOverflow(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec(`drop table if exists t1, t2`)
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tk.MustExec(`create table t1(a int)`)
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tk.MustExec(`insert into t1 values (-1)`)
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tk.MustExec(`create table t2(a int unsigned, index idx(a));`)
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tk.MustQuery(`select /*+ TIDB_INLJ(t2) */ * from t1 join t2 on t1.a = t2.a;`).Check(testkit.Rows())
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}
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func (s *testSuite2) TestIssue11061(c *C) {
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tk := testkit.NewTestKitWithInit(c, s.store)
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tk.MustExec("drop table if exists t1, t2")
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tk.MustExec("create table t1(c varchar(30), index ix_c(c(10)))")
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tk.MustExec("insert into t1 (c) values('7_chars'), ('13_characters')")
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tk.MustQuery("SELECT /*+ TIDB_INLJ(t1) */ SUM(LENGTH(c)) FROM t1 WHERE c IN (SELECT t1.c FROM t1)").Check(testkit.Rows("20"))
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}
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