diff --git a/store/tikv/coprocessor.go b/store/tikv/coprocessor.go
index fe5c1ecdc2..309f572964 100644
--- a/store/tikv/coprocessor.go
+++ b/store/tikv/coprocessor.go
@@ -61,6 +61,8 @@ func supportExpr(exprType tipb.ExprType) bool {
 		return true
 	case tipb.ExprType_Plus, tipb.ExprType_Div:
 		return true
+	case tipb.ExprType_Case:
+		return true
 	case tipb.ExprType_Count, tipb.ExprType_First, tipb.ExprType_Max, tipb.ExprType_Min, tipb.ExprType_Sum, tipb.ExprType_Avg:
 		return true
 	case kv.ReqSubTypeDesc: