Provide the ability to support system functions

[zhangheihei]

Feature request

Is your feature request related to a problem? Please describe.

Reference to other DBs,provides the following types of system functions:

• Control functions that allow you to execute actions in the system
• Information functions that return information about the system
• Information functions that return information about queries

For example: support dynamic restrict access table for cbo collect statistics

1. contorl funtion add exclusion

   select system$cbo_stats_add_exclusion("catalog",  "FULL");
   select system$cbo_stats_add_exclusion("catalog.db",  "FULL");
   select system$cbo_stats_add_exclusion("catalog.db.tbl",  "FULL");

remove exclusion

select system$cbo_stats_remove_exclusion(id)

2. information funsion

   select  system$cbo_stats_show_exclusion()

Design Doc https://docs.google.com/document/d/1ywUfACK-ph67cgIwM9LzMfc7svIScdnKHTAQOFtXW7s/edit

[alvin-celerdata]

@zhangheihei Thank you for adding such exciting features to StarRocks. Except for the function name, could you add more information for these functions, like the return of these functions?

[zhangheihei]

hi @alvin-celerdata I'll add doc, UT and sql test later.

[zhangheihei]

hi @alvin-celerdata the desgin doc added. For review purposes, I've split pr47951 into two parts. 1 System function frame: https://github.com/StarRocks/starrocks/pull/48380 2 Implementation of specific functions such as cbo_stats_add_exclusion