* fileservice: remove S3FSMinio; add NewS3FSOnMinio

* fileservice: add CacheFS

* Modify engine interface

* fix ut

Co-authored-by: daviszhen <daviszhen007@gmail.com>

* add anyvalue/avg/max/min/sum and test

* rewrite some agg with new decimal

Signed-off-by: Wu Qinxuan <wuqinxuan33@gmail.com>

* refine the code

Signed-off-by: Wu Qinxuan <wuqinxuan33@gmail.com>

* remove the redundant decimal64

Signed-off-by: Wu Qinxuan <wuqinxuan33@gmail.com>

* add approxcd and approxcd test

Signed-off-by: Wu Qinxuan <wuqinxuan33@gmail.com>

* fix anyvalue issue

Signed-off-by: Wu Qinxuan <wuqinxuan33@gmail.com>

Co-authored-by: nnsgmsone <nnsmgsone@outlook.com>

People have decided to move functions into plan/function
dir.

* fix hashmap insert issue

Signed-off-by: wuqinxuan <wuqinxuan33@gmail.com>

* fix hashmap insert issue

Signed-off-by: wuqinxuan <wuqinxuan33@gmail.com>

Signed-off-by: lokax <m632656684@gmail.com>

minor fix for various static check errors escaped from previous runs

intermediate libxxx.a files are no longer kept

* Add constraint for CTE, update sql faq and edit subquries docs

* update subquery overview

* rename subquery with all

By commeting out unused variable/functions.
Except mysql_cml_executor.go:918, which seems to be a real issue.

* label size modify
* modify ignore