265 lines
15 KiB
Go
265 lines
15 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 expression_test
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import (
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"fmt"
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. "github.com/pingcap/check"
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"github.com/pingcap/tidb/domain"
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"github.com/pingcap/tidb/kv"
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"github.com/pingcap/tidb/sessionctx"
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"github.com/pingcap/tidb/util/mock"
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"github.com/pingcap/tidb/util/testkit"
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"github.com/pingcap/tidb/util/testleak"
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)
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var _ = Suite(&testSuite{})
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type testSuite struct {
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store kv.Storage
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dom *domain.Domain
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ctx sessionctx.Context
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}
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func (s *testSuite) cleanEnv(c *C) {
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tk := testkit.NewTestKit(c, s.store)
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tk.MustExec("use test")
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r := tk.MustQuery("show tables")
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for _, tb := range r.Rows() {
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tableName := tb[0]
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tk.MustExec(fmt.Sprintf("drop table %v", tableName))
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}
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}
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func (s *testSuite) SetUpSuite(c *C) {
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var err error
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testleak.BeforeTest()
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s.store, s.dom, err = newStoreWithBootstrap()
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c.Assert(err, IsNil)
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s.ctx = mock.NewContext()
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}
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func (s *testSuite) TearDownSuite(c *C) {
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s.dom.Close()
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s.store.Close()
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testleak.AfterTest(c)()
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}
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func (s *testSuite) TestOuterJoinPropConst(c *C) {
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tk := testkit.NewTestKit(c, s.store)
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tk.MustExec("use test")
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tk.MustExec("drop table if exists t1, t2;")
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tk.MustExec("create table t1(id bigint primary key, a int, b int);")
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tk.MustExec("create table t2(id bigint primary key, a int, b int);")
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// Positive tests.
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tk.MustQuery("explain select * from t1 left join t2 on t1.a > t2.a and t1.a = 1;").Check(testkit.Rows(
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"HashLeftJoin_6 33233333.33 root CARTESIAN left outer join, inner:TableReader_11, left cond:[eq(test.t1.a, 1)]",
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"├─TableReader_8 10000.00 root data:TableScan_7",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_11 3323.33 root data:Selection_10",
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" └─Selection_10 3323.33 cop gt(1, test.t2.a)",
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" └─TableScan_9 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 left join t2 on t1.a > t2.a where t1.a = 1;").Check(testkit.Rows(
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"HashLeftJoin_7 33233.33 root CARTESIAN left outer join, inner:TableReader_13",
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"├─TableReader_10 10.00 root data:Selection_9",
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"│ └─Selection_9 10.00 cop eq(test.t1.a, 1)",
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"│ └─TableScan_8 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_13 3323.33 root data:Selection_12",
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" └─Selection_12 3323.33 cop gt(1, test.t2.a)",
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" └─TableScan_11 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 left join t2 on t1.a = t2.a and t1.a > 1;").Check(testkit.Rows(
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"HashLeftJoin_6 10000.00 root left outer join, inner:TableReader_11, equal:[eq(test.t1.a, test.t2.a)], left cond:[gt(test.t1.a, 1)]",
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"├─TableReader_8 10000.00 root data:TableScan_7",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_11 3333.33 root data:Selection_10",
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" └─Selection_10 3333.33 cop gt(test.t2.a, 1), not(isnull(test.t2.a))",
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" └─TableScan_9 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 left join t2 on t1.a = t2.a where t1.a > 1;").Check(testkit.Rows(
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"HashLeftJoin_7 4166.67 root left outer join, inner:TableReader_13, equal:[eq(test.t1.a, test.t2.a)]",
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"├─TableReader_10 3333.33 root data:Selection_9",
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"│ └─Selection_9 3333.33 cop gt(test.t1.a, 1)",
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"│ └─TableScan_8 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_13 3333.33 root data:Selection_12",
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" └─Selection_12 3333.33 cop gt(test.t2.a, 1), not(isnull(test.t2.a))",
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" └─TableScan_11 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 right join t2 on t1.a > t2.a where t2.a = 1;").Check(testkit.Rows(
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"HashRightJoin_7 33333.33 root CARTESIAN right outer join, inner:TableReader_10",
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"├─TableReader_10 3333.33 root data:Selection_9",
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"│ └─Selection_9 3333.33 cop gt(test.t1.a, 1)",
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"│ └─TableScan_8 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_13 10.00 root data:Selection_12",
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" └─Selection_12 10.00 cop eq(test.t2.a, 1)",
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" └─TableScan_11 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 right join t2 on t1.a = t2.a where t2.a > 1;").Check(testkit.Rows(
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"HashRightJoin_7 4166.67 root right outer join, inner:TableReader_10, equal:[eq(test.t1.a, test.t2.a)]",
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"├─TableReader_10 3333.33 root data:Selection_9",
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"│ └─Selection_9 3333.33 cop gt(test.t1.a, 1), not(isnull(test.t1.a))",
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"│ └─TableScan_8 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_13 3333.33 root data:Selection_12",
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" └─Selection_12 3333.33 cop gt(test.t2.a, 1)",
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" └─TableScan_11 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 right join t2 on t1.a = t2.a and t2.a > 1;").Check(testkit.Rows(
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"HashRightJoin_6 10000.00 root right outer join, inner:TableReader_9, equal:[eq(test.t1.a, test.t2.a)], right cond:gt(test.t2.a, 1)",
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"├─TableReader_9 3333.33 root data:Selection_8",
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"│ └─Selection_8 3333.33 cop gt(test.t1.a, 1), not(isnull(test.t1.a))",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_11 10000.00 root data:TableScan_10",
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" └─TableScan_10 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 right join t2 on t1.a > t2.a and t2.a = 1;").Check(testkit.Rows(
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"HashRightJoin_6 33333333.33 root CARTESIAN right outer join, inner:TableReader_9, right cond:eq(test.t2.a, 1)",
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"├─TableReader_9 3333.33 root data:Selection_8",
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"│ └─Selection_8 3333.33 cop gt(test.t1.a, 1)",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_11 10000.00 root data:TableScan_10",
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" └─TableScan_10 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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// Negative tests.
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tk.MustQuery("explain select * from t1 left join t2 on t1.a = t2.a and t2.a > 1;").Check(testkit.Rows(
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"HashLeftJoin_6 10000.00 root left outer join, inner:TableReader_11, equal:[eq(test.t1.a, test.t2.a)]",
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"├─TableReader_8 10000.00 root data:TableScan_7",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_11 3333.33 root data:Selection_10",
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" └─Selection_10 3333.33 cop gt(test.t2.a, 1), not(isnull(test.t2.a))",
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" └─TableScan_9 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 left join t2 on t1.a > t2.a and t2.a = 1;").Check(testkit.Rows(
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"HashLeftJoin_6 100000.00 root CARTESIAN left outer join, inner:TableReader_11, other cond:gt(test.t1.a, test.t2.a)",
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"├─TableReader_8 10000.00 root data:TableScan_7",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_11 10.00 root data:Selection_10",
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" └─Selection_10 10.00 cop eq(test.t2.a, 1), not(isnull(test.t2.a))",
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" └─TableScan_9 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 right join t2 on t1.a > t2.a and t1.a = 1;").Check(testkit.Rows(
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"HashRightJoin_6 100000.00 root CARTESIAN right outer join, inner:TableReader_9, other cond:gt(test.t1.a, test.t2.a)",
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"├─TableReader_9 10.00 root data:Selection_8",
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"│ └─Selection_8 10.00 cop eq(test.t1.a, 1), not(isnull(test.t1.a))",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_11 10000.00 root data:TableScan_10",
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" └─TableScan_10 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 right join t2 on t1.a = t2.a and t1.a > 1;").Check(testkit.Rows(
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"HashRightJoin_6 10000.00 root right outer join, inner:TableReader_9, equal:[eq(test.t1.a, test.t2.a)]",
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"├─TableReader_9 3333.33 root data:Selection_8",
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"│ └─Selection_8 3333.33 cop gt(test.t1.a, 1), not(isnull(test.t1.a))",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_11 10000.00 root data:TableScan_10",
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" └─TableScan_10 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 left join t2 on t1.a = t1.b and t1.a > 1;").Check(testkit.Rows(
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"HashLeftJoin_6 100000000.00 root CARTESIAN left outer join, inner:TableReader_10, left cond:[eq(test.t1.a, test.t1.b) gt(test.t1.a, 1)]",
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"├─TableReader_8 10000.00 root data:TableScan_7",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_10 10000.00 root data:TableScan_9",
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" └─TableScan_9 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 left join t2 on t2.a = t2.b and t2.a > 1;").Check(testkit.Rows(
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"HashLeftJoin_6 26666666.67 root CARTESIAN left outer join, inner:TableReader_11",
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"├─TableReader_8 10000.00 root data:TableScan_7",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_11 2666.67 root data:Selection_10",
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" └─Selection_10 2666.67 cop eq(test.t2.a, test.t2.b), gt(test.t2.a, 1)",
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" └─TableScan_9 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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// Constant equal condition merge in outer join.
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tk.MustQuery("explain select * from t1 left join t2 on true where t1.a = 1 and false;").Check(testkit.Rows(
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"TableDual_8 0.00 root rows:0",
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))
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tk.MustQuery("explain select * from t1 left join t2 on true where t1.a = 1 and null;").Check(testkit.Rows(
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"TableDual_8 0.00 root rows:0",
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))
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tk.MustQuery("explain select * from t1 left join t2 on true where t1.a = null;").Check(testkit.Rows(
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"TableDual_8 0.00 root rows:0",
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))
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tk.MustQuery("explain select * from t1 left join t2 on true where t1.a = 1 and t1.a = 2;").Check(testkit.Rows(
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"TableDual_8 0.00 root rows:0",
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))
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tk.MustQuery("explain select * from t1 left join t2 on true where t1.a = 1 and t1.a = 1;").Check(testkit.Rows(
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"HashLeftJoin_7 80000.00 root CARTESIAN left outer join, inner:TableReader_12",
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"├─TableReader_10 10.00 root data:Selection_9",
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"│ └─Selection_9 10.00 cop eq(test.t1.a, 1)",
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"│ └─TableScan_8 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_12 10000.00 root data:TableScan_11",
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" └─TableScan_11 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 left join t2 on false;").Check(testkit.Rows(
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"HashLeftJoin_6 80000000.00 root CARTESIAN left outer join, inner:TableDual_9",
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"├─TableReader_8 10000.00 root data:TableScan_7",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableDual_9 8000.00 root rows:0",
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))
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tk.MustQuery("explain select * from t1 right join t2 on false;").Check(testkit.Rows(
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"HashRightJoin_6 80000000.00 root CARTESIAN right outer join, inner:TableDual_7",
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"├─TableDual_7 8000.00 root rows:0",
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"└─TableReader_9 10000.00 root data:TableScan_8",
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" └─TableScan_8 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 left join t2 on t1.a = 1 and t1.a = 2;").Check(testkit.Rows(
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"HashLeftJoin_6 80000000.00 root CARTESIAN left outer join, inner:TableDual_9",
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"├─TableReader_8 10000.00 root data:TableScan_7",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableDual_9 8000.00 root rows:0",
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))
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tk.MustQuery("explain select * from t1 left join t2 on t1.a =1 where t1.a = 2;").Check(testkit.Rows(
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"HashLeftJoin_7 80000.00 root CARTESIAN left outer join, inner:TableDual_11",
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"├─TableReader_10 10.00 root data:Selection_9",
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"│ └─Selection_9 10.00 cop eq(test.t1.a, 2)",
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"│ └─TableScan_8 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableDual_11 8000.00 root rows:0",
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))
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tk.MustQuery("explain select * from t1 left join t2 on t2.a = 1 and t2.a = 2;").Check(testkit.Rows(
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"HashLeftJoin_6 10000.00 root CARTESIAN left outer join, inner:TableReader_11",
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"├─TableReader_8 10000.00 root data:TableScan_7",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_11 0.00 root data:Selection_10",
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" └─Selection_10 0.00 cop eq(test.t2.a, 1), eq(test.t2.a, 2)",
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" └─TableScan_9 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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// Constant propagation for DNF in outer join.
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tk.MustQuery("explain select * from t1 left join t2 on t1.a = 1 or (t1.a = 2 and t1.a = 3);").Check(testkit.Rows(
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"HashLeftJoin_6 100000000.00 root CARTESIAN left outer join, inner:TableReader_10, left cond:[or(eq(test.t1.a, 1), 0)]",
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"├─TableReader_8 10000.00 root data:TableScan_7",
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"│ └─TableScan_7 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_10 10000.00 root data:TableScan_9",
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" └─TableScan_9 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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tk.MustQuery("explain select * from t1 left join t2 on true where t1.a = 1 or (t1.a = 2 and t1.a = 3);").Check(testkit.Rows(
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"HashLeftJoin_7 80000.00 root CARTESIAN left outer join, inner:TableReader_12",
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"├─TableReader_10 10.00 root data:Selection_9",
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"│ └─Selection_9 10.00 cop or(eq(test.t1.a, 1), 0)",
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"│ └─TableScan_8 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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"└─TableReader_12 10000.00 root data:TableScan_11",
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" └─TableScan_11 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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// Constant propagation over left outer semi join, filter with aux column should not be derived.
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tk.MustQuery("explain select * from t1 where t1.b > 1 or t1.b in (select b from t2);").Check(testkit.Rows(
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"Projection_7 8000.00 root test.t1.id, test.t1.a, test.t1.b",
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"└─Selection_8 8000.00 root or(gt(test.t1.b, 1), 5_aux_0)",
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" └─HashLeftJoin_9 10000.00 root CARTESIAN left outer semi join, inner:TableReader_13, other cond:eq(test.t1.b, test.t2.b)",
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" ├─TableReader_11 10000.00 root data:TableScan_10",
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" │ └─TableScan_10 10000.00 cop table:t1, range:[-inf,+inf], keep order:false, stats:pseudo",
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" └─TableReader_13 10000.00 root data:TableScan_12",
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" └─TableScan_12 10000.00 cop table:t2, range:[-inf,+inf], keep order:false, stats:pseudo",
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))
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}
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