diff --git a/planner/core/issuetest/planner_issue_test.go b/planner/core/issuetest/planner_issue_test.go index 729285c6dca23..eca0075026746 100644 --- a/planner/core/issuetest/planner_issue_test.go +++ b/planner/core/issuetest/planner_issue_test.go @@ -103,53 +103,53 @@ func TestIssue47781(t *testing.T) { tk.MustExec("create table t2(id int,name varchar(10),name1 varchar(10),name2 varchar(10),`date1` date)") tk.MustExec("insert into t2 values(1,'tt','ttt','tttt','2099-12-31'),(2,'dd','ddd','dddd','2099-12-31')") tk.MustQuery(`WITH bzzs AS ( - SELECT - count(1) AS bzn - FROM + SELECT + count(1) AS bzn + FROM t c -), +), tmp1 AS ( - SELECT - t1.* - FROM - t1 - LEFT JOIN bzzs ON 1 = 1 - WHERE - name IN ('tt') + SELECT + t1.* + FROM + t1 + LEFT JOIN bzzs ON 1 = 1 + WHERE + name IN ('tt') AND bzn <> 1 -), +), tmp2 AS ( - SELECT - tmp1.*, - date('2099-12-31') AS endate - FROM + SELECT + tmp1.*, + date('2099-12-31') AS endate + FROM tmp1 -), +), tmp3 AS ( - SELECT - * - FROM - tmp2 - WHERE - endate > CURRENT_DATE - UNION ALL - SELECT - '1' AS id, - 'ss' AS name, - 'sss' AS name1, - 'ssss' AS name2, - date('2099-12-31') AS endate - FROM - bzzs t1 - WHERE + SELECT + * + FROM + tmp2 + WHERE + endate > CURRENT_DATE + UNION ALL + SELECT + '1' AS id, + 'ss' AS name, + 'sss' AS name1, + 'ssss' AS name2, + date('2099-12-31') AS endate + FROM + bzzs t1 + WHERE bzn = 1 -) -SELECT - c2.id, - c3.id -FROM - t2 db - LEFT JOIN tmp3 c2 ON c2.id = '1' +) +SELECT + c2.id, + c3.id +FROM + t2 db + LEFT JOIN tmp3 c2 ON c2.id = '1' LEFT JOIN tmp3 c3 ON c3.id = '1';`).Check(testkit.Rows("1 1", "1 1")) } @@ -167,3 +167,35 @@ func TestIssue51560(t *testing.T) { tk.MustQuery("select b.b from A a left join (B b left join C c on b.b = c.b) on b.b = a.b where a.a in (2, 3);").Sort().Check(testkit.Rows("1", "2")) tk.MustQuery("select b.b from A a left join (B b left join C c on b.b = c.b) on b.b = a.b where a.a in (2, 3, null);").Sort().Check(testkit.Rows("1", "2")) } + +func TestIssue50614(t *testing.T) { + store := testkit.CreateMockStore(t) + tk := testkit.NewTestKit(t, store) + tk.MustExec("use test") + tk.MustExec("drop table if exists tt") + tk.MustExec("create table tt(a bigint, b bigint, c bigint, d bigint, e bigint, primary key(c,d));") + tk.MustQuery("explain format = brief " + + "update tt, (select 1 as c1 ,2 as c2 ,3 as c3, 4 as c4 union all select 2,3,4,5 union all select 3,4,5,6) tmp " + + "set tt.a=tmp.c1, tt.b=tmp.c2 " + + "where tt.c=tmp.c3 and tt.d=tmp.c4 and (tt.c,tt.d) in ((11,111),(22,222),(33,333),(44,444));").Check( + testkit.Rows( + "Update N/A root N/A", + "└─Projection 0.00 root test.tt.a, test.tt.b, test.tt.c, test.tt.d, test.tt.e, Column#18, Column#19, Column#20, Column#21", + " └─Projection 0.00 root test.tt.a, test.tt.b, test.tt.c, test.tt.d, test.tt.e, Column#18, Column#19, Column#20, Column#21", + " └─IndexJoin 0.00 root inner join, inner:TableReader, outer key:Column#20, Column#21, inner key:test.tt.c, test.tt.d, equal cond:eq(Column#20, test.tt.c), eq(Column#21, test.tt.d), other cond:or(or(and(eq(Column#20, 11), eq(test.tt.d, 111)), and(eq(Column#20, 22), eq(test.tt.d, 222))), or(and(eq(Column#20, 33), eq(test.tt.d, 333)), and(eq(Column#20, 44), eq(test.tt.d, 444)))), or(or(and(eq(test.tt.c, 11), eq(Column#21, 111)), and(eq(test.tt.c, 22), eq(Column#21, 222))), or(and(eq(test.tt.c, 33), eq(Column#21, 333)), and(eq(test.tt.c, 44), eq(Column#21, 444))))", + " ├─Union(Build) 0.00 root ", + " │ ├─Projection 0.00 root Column#6, Column#7, Column#8, Column#9", + " │ │ └─Projection 0.00 root 1->Column#6, 2->Column#7, 3->Column#8, 4->Column#9", + " │ │ └─TableDual 0.00 root rows:0", + " │ ├─Projection 0.00 root Column#10, Column#11, Column#12, Column#13", + " │ │ └─Projection 0.00 root 2->Column#10, 3->Column#11, 4->Column#12, 5->Column#13", + " │ │ └─TableDual 0.00 root rows:0", + " │ └─Projection 0.00 root Column#14, Column#15, Column#16, Column#17", + " │ └─Projection 0.00 root 3->Column#14, 4->Column#15, 5->Column#16, 6->Column#17", + " │ └─TableDual 0.00 root rows:0", + " └─TableReader(Probe) 0.00 root data:Selection", + " └─Selection 0.00 cop[tikv] or(or(and(eq(test.tt.c, 11), eq(test.tt.d, 111)), and(eq(test.tt.c, 22), eq(test.tt.d, 222))), or(and(eq(test.tt.c, 33), eq(test.tt.d, 333)), and(eq(test.tt.c, 44), eq(test.tt.d, 444)))), or(or(eq(test.tt.c, 11), eq(test.tt.c, 22)), or(eq(test.tt.c, 33), eq(test.tt.c, 44))), or(or(eq(test.tt.d, 111), eq(test.tt.d, 222)), or(eq(test.tt.d, 333), eq(test.tt.d, 444)))", + " └─TableRangeScan 0.00 cop[tikv] table:tt range: decided by [eq(test.tt.c, Column#20) eq(test.tt.d, Column#21)], keep order:false, stats:pseudo", + ), + ) +} diff --git a/planner/core/logical_plans.go b/planner/core/logical_plans.go index a561ce702228d..ec688ba3a9a97 100644 --- a/planner/core/logical_plans.go +++ b/planner/core/logical_plans.go @@ -1140,9 +1140,13 @@ type LogicalMaxOneRow struct { } // LogicalTableDual represents a dual table plan. +// Note that sometimes we don't set schema for LogicalTableDual (most notably in buildTableDual()), which means +// outputting 0/1 row with zero column. This semantic may be different from your expectation sometimes but should not +// cause any actual problems now. type LogicalTableDual struct { logicalSchemaProducer + // RowCount could only be 0 or 1. RowCount int } diff --git a/planner/core/rule_predicate_push_down.go b/planner/core/rule_predicate_push_down.go index 9b1ce83b3bf09..77fc6b2005799 100644 --- a/planner/core/rule_predicate_push_down.go +++ b/planner/core/rule_predicate_push_down.go @@ -505,11 +505,6 @@ func (p *LogicalProjection) PredicatePushDown(predicates []expression.Expression return predicates, child } } - if len(p.children) == 1 { - if _, isDual := p.children[0].(*LogicalTableDual); isDual { - return predicates, p - } - } for _, cond := range predicates { substituted, hasFailed, newFilter := expression.ColumnSubstituteImpl(cond, p.Schema(), p.Exprs, true) if substituted && !hasFailed && !expression.HasGetSetVarFunc(newFilter) {