From 742f361af5f879066bbe4f1a6c8349d3a81e1dea Mon Sep 17 00:00:00 2001
From: ti-srebot <66930949+ti-srebot@users.noreply.github.com>
Date: Thu, 14 Jul 2022 18:51:07 +0800
Subject: [PATCH] executor: fix index_lookup_hash_join hang when used with
 limit (#35820) (#36101)

close pingcap/tidb#35638
---
 executor/index_lookup_hash_join.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/executor/index_lookup_hash_join.go b/executor/index_lookup_hash_join.go
index 65ec964ed2d55..9c16d1958493f 100644
--- a/executor/index_lookup_hash_join.go
+++ b/executor/index_lookup_hash_join.go
@@ -627,7 +627,10 @@ func (iw *indexHashJoinInnerWorker) handleTask(ctx context.Context, task *indexH
 		if task.keepOuterOrder {
 			if err != nil {
 				joinResult.err = err
-				resultCh <- joinResult
+				select {
+				case <-ctx.Done():
+				case resultCh <- joinResult:
+				}
 			}
 			close(resultCh)
 		}