fix: distinct wrong result issue

fix(query): add null check.

fix: join eq conditions optimization work on not only for tag

fix: last table scan issue

enh: optimize order by for partition by clause

fix: join improvement

fix: memory size overflow issue

fix: union clause error message

fix: select <expr1>, <expr1##sth else> from ... return error data whe…

fix(stream): fix memory leak for stream processing.

Update cases.task

modify non asan mode

docs(connector-rust): update documents of connector for rust

fix: join push down condition issue

The connector for rust has been updated to use `deadpool` as default connection pool instead of `r2d2`, and the `r2d2` was only kept for blocking mode.

fix(stream):extract delete msg from wal.

Enh/tsbs perf.4