From a0200315525fbca26b7f11246ec3ab841241b05a Mon Sep 17 00:00:00 2001
From: Jay Zhuang <zjay@fb.com>
Date: Thu, 2 Jun 2022 13:10:49 -0700
Subject: [PATCH] Add kLastTemperature as temperature high bound (#10044)

Summary:
Only used as temperature high bound for current code, may
increase with more temperatures added.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/10044

Test Plan: ci

Reviewed By: siying

Differential Revision: D36633410

Pulled By: jay-zhuang

fbshipit-source-id: eecdfa7623c31778c31d789902eacf78aad7b482
---
 db/db_test2.cc                     | 5 +++++
 include/rocksdb/advanced_options.h | 1 +
 2 files changed, 6 insertions(+)

diff --git a/db/db_test2.cc b/db/db_test2.cc
index 34fc58967..52bc1a78d 100644
--- a/db/db_test2.cc
+++ b/db/db_test2.cc
@@ -6883,6 +6883,11 @@ TEST_F(DBTest2, BottommostTemperatureUniversal) {
   ASSERT_EQ(size, 0);
   size = GetSstSizeHelper(Temperature::kCold);
   ASSERT_GT(size, 0);
+
+  // kLastTemperature is an invalid temperature
+  options.bottommost_temperature = Temperature::kLastTemperature;
+  s = TryReopen(options);
+  ASSERT_TRUE(s.IsIOError());
 }
 
 TEST_F(DBTest2, LastLevelStatistics) {
diff --git a/include/rocksdb/advanced_options.h b/include/rocksdb/advanced_options.h
index 313f28992..e1b3aabd8 100644
--- a/include/rocksdb/advanced_options.h
+++ b/include/rocksdb/advanced_options.h
@@ -223,6 +223,7 @@ enum class Temperature : uint8_t {
   kHot = 0x04,
   kWarm = 0x08,
   kCold = 0x0C,
+  kLastTemperature,
 };
 
 // The control option of how the cache tiers will be used. Currently rocksdb