add default behavior

pingcap · Nov 13, 2020 · 384e507 · 384e507
1 parent b5dedb1
commit 384e507
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/planner/core/expression_rewriter.go b/planner/core/expression_rewriter.go
@@ -417,13 +417,15 @@ func (er *expressionRewriter) Enter(inNode ast.Node) (ast.Node, bool) {
 			er.tryFoldCounter++
 		}
 	case *ast.CaseExpr:
+		er.asScalar = true
 		if _, ok := expression.DisableFoldFunctions["case"]; ok {
 			er.disableFoldCounter++
 		}
 		if _, ok := expression.TryFoldFunctions["case"]; ok {
 			er.tryFoldCounter++
 		}
 	case *ast.BinaryOperationExpr:
+		er.asScalar = true
 		if v.Op == opcode.LogicAnd || v.Op == opcode.LogicOr {
 			er.tryFoldCounter++
 		}