diff --git a/planner/core/logical_plan_builder.go b/planner/core/logical_plan_builder.go
index b0216c1b7f320..86bc02b47ce38 100644
--- a/planner/core/logical_plan_builder.go
+++ b/planner/core/logical_plan_builder.go
@@ -714,7 +714,8 @@ func extractTableAlias(p Plan, parentOffset int) *hintTableInfo {
 	if len(p.OutputNames()) > 0 && p.OutputNames()[0].TblName.L != "" {
 		firstName := p.OutputNames()[0]
 		for _, name := range p.OutputNames() {
-			if name.TblName.L != firstName.TblName.L || name.DBName.L != firstName.DBName.L {
+			if name.TblName.L != firstName.TblName.L ||
+				(name.DBName.L != "" && firstName.DBName.L != "" && name.DBName.L != firstName.DBName.L) { // DBName can be nil, see #46160
 				return nil
 			}
 		}