Enhancements

• Performance optimization for twa on super table
• Performance optimization for select count(*)
• TTL can be used when creating table automatically with insert statement
• Prefix and Suffix can be configured to influence the hash on table name

Fixed Bugs

• taosd crash when querying number of subtables and can't be restarted
• taosd crash caused by interp()
• taosd crash caused by twa+interval
• taosd crash caused by invalid row index
• taosd failed to restart with existing data
• taosd crash after alter table TTL to 1 and continue to crash when restarting
• taosd crash caused by last()
• taosd crash caused by query with group by
• taosd crash caused by percentile
• taosd crash after creating stream
• taosd crash when inserting with stream
• vnode traps in infinite loop
• Insert hangs after creating SMA
• Deadlock in client side caused by frequent taos_connect()/taos_close()
• CPU usage is too high when querying number of subtables
• Client hang caused by high stress querying
• limit doesn't work with nested query
• TTL used as query condition doesn't work for information_schema
• Calculation error in length() function
• Memory leak problems in taosd
• Some other crashes in taosd