From 8919708288a95ee6cf8179c2528e1576269f48b5 Mon Sep 17 00:00:00 2001
From: qxhy123 <qxhy123@gmail.com>
Date: Mon, 12 Mar 2018 10:25:20 +0800
Subject: [PATCH] remove Next() function for MaxOneRowExec

---
 executor/executor.go | 23 -----------------------
 1 file changed, 23 deletions(-)

diff --git a/executor/executor.go b/executor/executor.go
index efc11feb7427e..ff3e7e25e04f6 100644
--- a/executor/executor.go
+++ b/executor/executor.go
@@ -1140,29 +1140,6 @@ func (e *MaxOneRowExec) Open(ctx context.Context) error {
 	return nil
 }
 
-// Next implements the Executor Next interface.
-func (e *MaxOneRowExec) Next(ctx context.Context) (Row, error) {
-	if !e.evaluated {
-		e.evaluated = true
-		srcRow, err := e.children[0].Next(ctx)
-		if err != nil {
-			return nil, errors.Trace(err)
-		}
-		if srcRow == nil {
-			return make([]types.Datum, e.schema.Len()), nil
-		}
-		srcRow1, err := e.children[0].Next(ctx)
-		if err != nil {
-			return nil, errors.Trace(err)
-		}
-		if srcRow1 != nil {
-			return nil, errors.New("subquery returns more than 1 row")
-		}
-		return srcRow, nil
-	}
-	return nil, nil
-}
-
 // NextChunk implements the Executor NextChunk interface.
 func (e *MaxOneRowExec) NextChunk(ctx context.Context, chk *chunk.Chunk) error {
 	chk.Reset()