Mycat2 Files

1.fix union all rewriting sql has error 2.support fullTableScanLimit 3.improve condition analyse 4.support C# client 5.supoort select dual push down 6.fix select 'x' alias wih '' 7.update guava to 31.0.1-jre 8.update mysql-connector-java to 8.0.25 9.update fastjson to 1.2.79 10.fix wrong lastMessage 11.support HAProxy ProxyProtocol 12.support fullTableScanException 13.remove unused jar 14.fix maven package 15.support slb 16.fix prerpare command reveives wrong date value 17.improve backend connection scheduler 18.fix record slow sql has wrong collation 19.support asyncDDL setting 20.fix dist join has died lock 21.add thread hint tool 22.add kill packet command 23.add pushShowOnPrototype setting 24.normal/global table 's delete/update statement supports join datasource 25.fix Colocated push lost mysql hint 26.add PartitionByDateEx function 27.add rewriteInsertBatchedStatementBatch setting 28.add xxx.user.json isolation setting 29.fix com.mysql.jdbc.PacketTooBigException: Packet for query is too large (23 > -1). You can change this value on the server by setting the max_allowed_packet' variable. 30.improve performance by remove autocommit/isolation in getting backend connection 31.logical database supports '-'' in name 32.shading table sql support json function -> 33.fix SELECT * FROM A WHERE aid IN (SELECT DISTINCT aid FROM B ) B is Sharding table ,aid is non unique column