* [TD-4684]<test>: add test case for nano second timestamp

* [TD-4684]<feature>: nano second timestamp precision is supported in jdbc-restful

* [TD-4684]

* change

* [TD-4745]<fix>: fix resultsetMetadata is null if query resultSet is null

* [TD-4668]<test>: test prepared statement batch insert

* [TD-4668]<fix>: fix executeBatch error in prepared statment for JNI

* change

* change

* change

* change

* change

* change

[TD-4715]bug fix:fix unreset hasRestoreLastColumn flag bug

[TD-4747]<test>grafana query multi NULL col

Td4568and4541

[TD-3776]fix:set time precision after parsing and JNI time precision chg

[TD-4394]fix core when select data after modify tag width

[TD-4366] adding more ntp. try to make sure ntp is turned on

[TD-4608] <TEST> add test case for stmt error

[TD-4598]<enhance>: refactored mapping of TD error code to HTTP error code

Feature/query

[TD-4721]<fix>: NULL column in a row was specially processed

[TD-2639] <docs>: fix word "MATLAB" spelling.

Docs/update latest feature

[TD-3178]: compact db

[TD-4681]<fix>: return invalid operation for not equal on primary ts

[TD-4693]add sql check for develop

[TD-4697]change assert to err msg

[TD-4720]add subquery check