Release Notes

FIX BUGS:
[TD-2420]: fix import file crash.
[TD-2373]: data race in removeFromWheel
[TD-2368]: show 4 new variables
[TD-2366]: is (not) null for binary/nchar
[TD-2274]: make ep inconsistent log message more clear
[TD-2363]: Super Table hash is emptied abnormally, resulting in data query failure
[TD-2370]: fix the deadlock when the system exits
[TD-2347]: Modify some bugs in data migration and add mandatory check
[TD-2342]: disallow cross db create child table
[TD-2420]: fix import file crash.
[TD-2424]: fix the float column precision caused filter failure.
[TD-2129]: fix the bug that twa query result is incorrect while the value is less than 0.
[TD-2414]: fix the bug that twa query processing causes server crash while query time range is empty.
[TD-2165]: fix the bug that query can not be stopped if all query threads are busy.
[TD-2364]: fix mybatis-plus pagenation exceptions
[TD-2373]: data race in removeFromWheel
[TD-2366]: is (not) null for binary/nchar
[TD-2342]: disallow cross db create child table
[TD-2344]: fix bugs for percentile against float columns.

ENHANCEMENTS:
[TD-2371]:Record important information to a separate log file called taoinfo
[TD-2304]: make *Invalid timestamp* error more clear
[TD-2379]: configure the number of CPU cores available for query processing.
[TD-2375]: configure the number of CPU cores available for query processing.
[TD-2361]: optimize the failure retry in insert processing.

NEW FEATURES:
[TD-2405]: new option -C (--dump-config) for taos and -C for taosd to dump configuration
[TD-2310]: add dest table into show streams
[TD-2191]: taosdemo tool for java developers
[TD-1680]: print ellipsis when binary/nchar is too long

DOCS:

TEST:
[TD-2129]: add test case for twa
[TD-2114]: Improve performance test script
[TD-2342]: add test case