From 4fba6bea82f00ac811093681130ccf83a79dee63 Mon Sep 17 00:00:00 2001
From: Alan Bernstein <alan.aaron.bernstein@gmail.com>
Date: Fri, 29 Jan 2021 09:39:01 -0600
Subject: [PATCH] Prevent nil pointer exception during Distinct key translation

---
 executor.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/executor.go b/executor.go
index 9fa829aac..9b4ad515e 100644
--- a/executor.go
+++ b/executor.go
@@ -6572,6 +6572,9 @@ func (e *executor) translateResult(ctx context.Context, index string, idx *Index
 
 			if field.Keys() {
 				rslt := result.Pos
+				if rslt == nil {
+					return &SignedRow{Pos: &Row{}}, nil
+				}
 				other := &Row{Attrs: rslt.Attrs}
 				for _, segment := range rslt.Segments() {
 					keys, err := e.Cluster.translateIndexIDs(context.Background(), field.ForeignIndex(), segment.Columns())