From 070894a5977755a1aa6bfabf3670faf7efc1321a Mon Sep 17 00:00:00 2001
From: Xiaoxi Wang <xiaoxi.wang@snowflake.com>
Date: Thu, 15 Dec 2022 12:56:49 -0800
Subject: [PATCH] return early if streams is empty

---
 fdbclient/BlobGranuleFiles.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fdbclient/BlobGranuleFiles.cpp b/fdbclient/BlobGranuleFiles.cpp
index b0a1331d10..752f33b9e8 100644
--- a/fdbclient/BlobGranuleFiles.cpp
+++ b/fdbclient/BlobGranuleFiles.cpp
@@ -1338,6 +1338,10 @@ static RangeResult mergeDeltaStreams(const BlobGranuleChunkRef& chunk,
 	ASSERT(streams.size() < std::numeric_limits<int16_t>::max());
 	ASSERT(startClears.size() == streams.size());
 
+	if (streams.empty()) {
+		return RangeResult{};
+	}
+
 	int prefixLen = commonPrefixLength(chunk.keyRange.begin, chunk.keyRange.end);
 
 	// next element for each stream