Improve the performance under the tpch data set by reconstructing the join related code and the use of hash table
Co-authored-by: HappenLee <happenlee@hotmail.com>
Co-authored-by: BiteTheDDDDt <pxl290@qq.com>
Currently, there are some useless includes in the codebase. We can use a tool named include-what-you-use to optimize these includes. By using a strict include-what-you-use policy, we can get lots of benefits from it.
When the be_exec_version is less than 2, murmurhash will still be used, otherwise crc32 will be used. When the be_exec_version is upgraded to 2, please remove.
The column id check in VSlotRef::execute function before is too strict for fuzzy test to continuously produce random query. Temporarily loosen the check logic.
Moreover, there exists some careless call to VExpr::get_const_col, it might return a nullptr but not every function call checks if it's valid. It's an underlying problem.
