The version is updated as follows:

feature：

• [#902] support oracle database in AT mode
• [#1447] support oracle batch operation
• [#1392] support undo log table name configurable
• [#1353] support mysql batch update and batch delete
• [#1379] support -Dkey=value SysConfig
• [#1365] support schedule check table mata
• [#1371] support mysql preparedStatement batch self-increment primary keys
• [#1337] support mysql batch insert for non-self-inc primary keys
• [#1453] support delete expired undolog use protobuf codec
• [#1235] support to delete undolog in back task use seata codec
• [#1323] support database driver class configuration item

bugfix：

• [#1456] fix xid would be duplicate in cluster mode
• [#1454] fix DateCompareUtils can not compare byte array
• [#1452] fix select for update retry get dirty value
• [#1443] fix serialize the type of timestamp lost nano value
• [#1374] fix store.mode get configuration inconsistent
• [#1409] fix map.toString() error
• [#1344] fix ByteBuffer allocates a fixed length, which cause BufferOverflowException
• [#1419] fix if the connection is autocommit=false will cause fail to delete
• [#1370] fix begin failed not release channel and throw exception
• [#1396] fix ClassNotFound problem for Nacos config implementation
• [#1395] fix check null channel
• [#1385] fix get SessionManager error when rollback retry timeout
• [#1378] fix clusterAddressMap did not remove the instance after the instance was offline
• [#1332] fix nacos script initialization the configuration value contains ’=‘ failed
• [#1341] fix multiple operations on the same record in the same local transaction, rollback failed
• [#1339] fix when image is EmptyTableRecords, rollback failed
• [#1314] fix if don't specify the startup parameters, db mode don't take effect
• [#1342] fix ByteBuffer allocate len error
• [#1333] fix netty memory leak
• [#1338] fix lock is not acquired when multiple branches have cross locks
• [#1334] fix lock key npe bug, when tcc use protobuf
• [#1313] fix DefaultFailureHandler check status NPE

optimize：

• [#1474] optimize data image compare log
• [#1446] optimize the server's schedule tasks
• [#1448] refactor executor class remove the duplicate code
• [#1408] change ChannelFactory package in TmRpcClientTest
• [#1432] implement equals and hashcode of the object that is used as the hash key
• [#1429] remove unused imports
• [#1426] fix syntax error
• [#1425] fix typo
• [#1356] optimize sql join
• [#1416] optimize some javadoc comments
• [#1417] optimize oracle keyword
• [#1404] optimize BranchStatus comments
• [#1414] optimize mysql keywords
• [#1407] disable unstable unit tests
• [#1398] optimize eureka registry serviceUrl with default port
• [#1364] optimize table columns name defined as constants
• [#1389] add the oracle support prompt information
• [#1375] add compareRows failed log
• [#1358] clean temporary file file runs when UT is finished
• [#1355] add test case for rpc protocol
• [#1357] code clean of Consul&Etcd config center implementations
• [#1345] code clean and modify log level
• [#1329] add STORE_FILE_DIR default value

Thanks to these contributors for their code commits. Please report an unintended omission.

• slievrly
• Justice-love
• l81893521
• ggndnn
• zjinlei
• andyqian
• cmonkey
• wangjin
• Arlmls
• lukairui
• kongwang
• lightClouds917
• xingfudeshi
• alicexiaoshi
• itxingqing
• wanghuizuo
• 15168326318
• github-ygy
• ujjboy
• leizhiyuan
• vikenlove

Also, we receive many valuable issues, questions and advices from our community. Thanks for you all.