Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

planner/core: fix not null flag for using and natural join #13735

Merged
merged 2 commits into from
Nov 26, 2019
Merged
Show file tree
Hide file tree
Changes from all commits
Commits
File filter

Filter by extension

Filter by extension

Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 3 additions & 1 deletion planner/core/integration_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -155,7 +155,7 @@ func (s *testIntegrationSuite) runTestsWithTestData(caseName string, tk *testkit
}
}

func (s *testIntegrationSuite) TestApplyNotNullFlag(c *C) {
func (s *testIntegrationSuite) TestJoinNotNullFlag(c *C) {
store, dom, err := newStoreWithBootstrap()
c.Assert(err, IsNil)
tk := testkit.NewTestKit(c, store)
Expand All @@ -170,6 +170,8 @@ func (s *testIntegrationSuite) TestApplyNotNullFlag(c *C) {
tk.MustExec("insert into t2 values (1)")

tk.MustQuery("select IFNULL((select t1.x from t1 where t1.x = t2.x), 'xxx') as col1 from t2").Check(testkit.Rows("xxx"))
tk.MustQuery("select ifnull(t1.x, 'xxx') from t2 left join t1 using(x)").Check(testkit.Rows("xxx"))
tk.MustQuery("select ifnull(t1.x, 'xxx') from t2 natural left join t1").Check(testkit.Rows("xxx"))
}

func (s *testIntegrationSuite) TestAntiJoinConstProp(c *C) {
Expand Down
13 changes: 9 additions & 4 deletions planner/core/logical_plan_builder.go
Original file line number Diff line number Diff line change
Expand Up @@ -581,7 +581,7 @@ func (b *PlanBuilder) buildUsingClause(p *LogicalJoin, leftPlan, rightPlan Logic
for _, col := range join.Using {
filter[col.Name.L] = true
}
return b.coalesceCommonColumns(p, leftPlan, rightPlan, join.Tp == ast.RightJoin, filter)
return b.coalesceCommonColumns(p, leftPlan, rightPlan, join.Tp, filter)
}

// buildNaturalJoin builds natural join output schema. It finds out all the common columns
Expand All @@ -591,16 +591,21 @@ func (b *PlanBuilder) buildUsingClause(p *LogicalJoin, leftPlan, rightPlan Logic
// Every column in the first (left) table that is not a common column
// Every column in the second (right) table that is not a common column
func (b *PlanBuilder) buildNaturalJoin(p *LogicalJoin, leftPlan, rightPlan LogicalPlan, join *ast.Join) error {
return b.coalesceCommonColumns(p, leftPlan, rightPlan, join.Tp == ast.RightJoin, nil)
return b.coalesceCommonColumns(p, leftPlan, rightPlan, join.Tp, nil)
}

// coalesceCommonColumns is used by buildUsingClause and buildNaturalJoin. The filter is used by buildUsingClause.
func (b *PlanBuilder) coalesceCommonColumns(p *LogicalJoin, leftPlan, rightPlan LogicalPlan, rightJoin bool, filter map[string]bool) error {
func (b *PlanBuilder) coalesceCommonColumns(p *LogicalJoin, leftPlan, rightPlan LogicalPlan, joinTp ast.JoinType, filter map[string]bool) error {
lsc := leftPlan.Schema().Clone()
rsc := rightPlan.Schema().Clone()
if joinTp == ast.LeftJoin {
resetNotNullFlag(rsc, 0, rsc.Len())
} else if joinTp == ast.RightJoin {
resetNotNullFlag(lsc, 0, lsc.Len())
}
lColumns, rColumns := lsc.Columns, rsc.Columns
lNames, rNames := leftPlan.OutputNames().Shallow(), rightPlan.OutputNames().Shallow()
if rightJoin {
if joinTp == ast.RightJoin {
lNames, rNames = rNames, lNames
lColumns, rColumns = rsc.Columns, lsc.Columns
}
Expand Down