plan: set proper parent for newly projection-eliminated child (pingca…

…p#4730)
lvrongnan · Oct 10, 2017 · a8db31d · a8db31d
1 parent 2ddcc2b
commit a8db31d
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/plan/eliminate_projection.go b/plan/eliminate_projection.go
@@ -72,7 +72,9 @@ func resolveExprAndReplace(origin expression.Expression, replace map[string]*exp
 func doPhysicalProjectionElimination(p PhysicalPlan) PhysicalPlan {
 	children := make([]Plan, 0, len(p.Children()))
 	for _, child := range p.Children() {
-		children = append(children, doPhysicalProjectionElimination(child.(PhysicalPlan)))
+		newChild := doPhysicalProjectionElimination(child.(PhysicalPlan))
+		children = append(children, newChild)
+		newChild.SetParents(p)
 	}
 	p.SetChildren(children...)