From 1db81809d595a5afc4fa82b2d31bbc2d1b9a8923 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=A5=8F=E4=B9=8B=E7=AB=A0?= <mm304321141@gmail.com>
Date: Thu, 21 Nov 2019 15:18:06 +0800
Subject: [PATCH] Fix RangeDeletion Snapshot bug

---
 db/memtable_list.cc | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/db/memtable_list.cc b/db/memtable_list.cc
index d9159b793..4004fa79e 100644
--- a/db/memtable_list.cc
+++ b/db/memtable_list.cc
@@ -186,11 +186,14 @@ Status MemTableListVersion::AddRangeTombstoneIterators(
     const ReadOptions& read_opts, Arena* /*arena*/,
     RangeDelAggregator* range_del_agg) {
   assert(range_del_agg != nullptr);
+  SequenceNumber snapshot = kMaxSequenceNumber;
+  if (read_opts.snapshot != nullptr) {
+    snapshot = read_opts.snapshot->GetSequenceNumber();
+  }
   for (auto& m : memlist_) {
     // Using kMaxSequenceNumber is OK because these are immutable memtables.
     std::unique_ptr<FragmentedRangeTombstoneIterator> range_del_iter(
-        m->NewRangeTombstoneIterator(read_opts,
-                                     kMaxSequenceNumber /* read_seq */));
+        m->NewRangeTombstoneIterator(read_opts, snapshot /* read_seq */));
     range_del_agg->AddTombstones(std::move(range_del_iter));
   }
   return Status::OK();