* add support for test of Join Table

* fix comment

* format code

* fix

* fix

* fix

* replace table assert with tableReference assert

* delete getSimpleTables

* fix

* fix

* fix

* rename getTables to getSimpleTableSegments

* fix for fun name

* delete <tables>

* delete some comment
Co-authored-by: Nlujingshang1 <lujingshang1@jd.com>