3.0.1.6

Enhancements:

• TSMA can handle historical and out-of-order data
• Performance optimization in a lot of querying scenarios on a super table: last_row(), last(), cound(*), avg(), max(), min(), limit
• Security improvement by RPC integrity check
• Optimized error message when client version doesn't match with the server
• Performance improvement for select * from ins_tables
• "show dnode variables" can be used with like clause
• "show cluster variables" can show the cluster level configurations
• "show vgroup" added a new state: restore
• Table length is checked when adding a new column
• Enhanced the atomicity of vnode commit
• Improved stability

Fixed OOM & Crash:

• OOM in case of "select *" from a super table
• taosd crash causedby interp()
• taosd hangs in cloud service
• taosd OOM after long time data writing
• OOM caused by taosc in taosBenchmark and taosAdapter
• Some crashes occurred in case of replica=3
• mnode failed to restart because of corrupted metadata
• taosd crash caused by not deleting the index of deleted tables
• taosd crash caused by last_row()
• taosd crash caused by querying with group by and where condition
• taosd crash caused by querying data from deleted tables
• taosd crash caused by "show create table" on a table of 4,000 columns
• taosd crash caused by count(*)
• taos crash caused by broken network
• taos crash caused by completing the command automatically
• Some other crash problems

Fixed functional bugs:

• last() doesn't return result even though there is data
• Pseudo column _irowts returns zero timestamp
• The number of rows returned by count(*) is larger than actual data size by one
• "show create database" doesn't show cachesize parameter
• Wrong result returned by apercentile()
• Reesults are different when querying with "group by" and "where" on same tag
• Incorrect sequence returned by order by
• Two mnodes are in "candidate" and one is in "leader"