From c00e7ef1103a8e7804b6f71fe8e90d0a2d9a9b02 Mon Sep 17 00:00:00 2001
From: George Brighton <gebn@users.noreply.github.com>
Date: Fri, 24 Nov 2023 08:55:33 +0000
Subject: [PATCH] Fix handling for returned error added in f9100fb (#3176)

---
 tempodb/encoding/vparquet3/block_autocomplete.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tempodb/encoding/vparquet3/block_autocomplete.go b/tempodb/encoding/vparquet3/block_autocomplete.go
index aa7fa6b8411..e8bd765f2ad 100644
--- a/tempodb/encoding/vparquet3/block_autocomplete.go
+++ b/tempodb/encoding/vparquet3/block_autocomplete.go
@@ -380,7 +380,7 @@ func createDistinctAttributeIterator(
 	if len(valueIters) > 0 || len(iters) > 0 {
 
 		if len(valueIters) > 0 {
-			tagIter := parquetquery.NewLeftJoinIterator(
+			tagIter, err := parquetquery.NewLeftJoinIterator(
 				definitionLevel,
 				[]parquetquery.Iterator{makeIter(keyPath, parquetquery.NewStringInPredicate(attrKeys), "key")},
 				valueIters,
@@ -389,6 +389,9 @@ func createDistinctAttributeIterator(
 					keep:  keep,
 				},
 			)
+			if err != nil {
+				return nil, fmt.Errorf("creating left join iterator: %w", err)
+			}
 			iters = append(iters, tagIter)
 		}
 		return parquetquery.NewJoinIterator(