From 98f342036279e7d0ecfdd50ba801e1ec92839072 Mon Sep 17 00:00:00 2001
From: "Zhuomin(Charming) Liu" <lzmhhh123@gmail.com>
Date: Mon, 24 Feb 2020 16:28:07 +0800
Subject: [PATCH] expression: disable Duration/JSON related function push down
 to tiflash (#14861)

---
 expression/expression.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/expression/expression.go b/expression/expression.go
index 14994b384c113..4cec2481facbd 100644
--- a/expression/expression.go
+++ b/expression/expression.go
@@ -690,6 +690,10 @@ func IsBinaryLiteral(expr Expression) bool {
 // CheckExprPushFlash checks a expr list whether each expr can be pushed to flash storage.
 func CheckExprPushFlash(exprs []Expression) (exprPush, remain []Expression) {
 	for _, expr := range exprs {
+		if expr.GetType().Tp == mysql.TypeDuration || expr.GetType().Tp == mysql.TypeJSON {
+			remain = append(remain, expr)
+			continue
+		}
 		switch x := expr.(type) {
 		case *Constant, *CorrelatedColumn, *Column:
 			exprPush = append(exprPush, expr)