Add index for table ReleaseHistory (#4550)

* add index for table ReleaseHistory

* update CHANGES.md

* add delta SQL

CHANGES.md

@@ -27,6 +27,7 @@ Apollo 2.1.0
 * [fix the deleted at timestamp issue](https://github.com/apolloconfig/apollo/pull/4493)
 * [add configuration processor for portal developers](https://github.com/apolloconfig/apollo/pull/4521)
 * [Add a potential json value check feature](https://github.com/apolloconfig/apollo/pull/4519)
+* [Add index for table ReleaseHistory](https://github.com/apolloconfig/apollo/pull/4550)
 
 ------------------
 All issues and pull requests are [here](https://github.com/apolloconfig/apollo/milestone/11?closed=1)

scripts/sql/apolloconfigdb.sql

@@ -345,7 +345,8 @@ CREATE TABLE `ReleaseHistory` (
   PRIMARY KEY (`Id`),
   KEY `IX_Namespace` (`AppId`,`ClusterName`,`NamespaceName`,`BranchName`),
   KEY `IX_ReleaseId` (`ReleaseId`),
-  KEY `IX_DataChange_LastTime` (`DataChange_LastTime`)
+  KEY `IX_DataChange_LastTime` (`DataChange_LastTime`),
+  KEY `IX_PreviousReleaseId` (`PreviousReleaseId`)
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='发布历史';
 
 

scripts/sql/delta/v200-v210/apolloconfigdb-v200-v210.sql

@@ -0,0 +1,21 @@
+--
+-- Copyright 2022 Apollo Authors
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+-- http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+--
+# delta schema to upgrade apollo config db from v2.0.0 to v2.1.0
+
+Use ApolloConfigDB;
+
+-- add INDEX for ReleaseHistory table
+CREATE INDEX IX_PreviousReleaseId ON ReleaseHistory(PreviousReleaseId);