This commit fix the issue [ISSUE-2002].
It changes the priority of coalesce, ifnull, nullif function etc.
The priority of decimal is higher then varchar in the IS_SUPERTYPE_OF compare mode.
Example:
select coalesce(decimal_column, 1) from table;
the return type of coalesce should be decimal instead of varchar.
Add supertype about datetime and date
The supertype of datetime is bigint, largeint etc.
In IS_SUPERTYPE_OF compare mode, the function(bigint, bigint, bigint) is a supertype of function(datetime, bigint, int).
Example:
select coalesce(now(), 1)) from web_returns;
the return type of coalesce should be bigint instead of varchar.
[Bug][BetaRowset] fix beta rowset read slowly with limit
beta rowset do not update raw_rows_read in statistics and will read all
data in tablet when query with limit, which lead to long query time.
If FE is restarted between txn committed and visible, the load job will be rescheduled and failed with label already exists.
The reason is that there are inconsistency between transaction of load job and meta of load job.
So, the replay of the txn attachment need to be done in function replayOnCommitted.
The load job state and progress is correct after that.
The prepare/close step of scalar function is already supported in execution framework, We only need to do is that support it in syntax and meta in frontend.
In addition, 'Hive' binary type of scalar function NOT supports prepare/close step, we need to make it supports.
Now Env has unify all environment operation, such as file operation.
However some of our old functions don't leverage it. This change unify
FileUtils::scan_dir to use Env's function.
When making snapshot for incremental clone, missed singleton versions may have been compacted.
So get_rowset_by_version() will not acquire any rowset.
This rowset should be acquired from _inc_rs_version_map.
In Storage Engine GC, TabletManger use std::regex to extract tablet id
and schema hash from path. But it will construct regex pattern for
every path to check, this is a huge waste. This change list make this
pattern a global static pattern, and replace it with RE2, which has
better performance.
This commit enable the avg operator in fe instead of converting the avg function into sum/count.
Also, this commit fix the bug of deciamlv2 avg which cause the core in be.
The int128 could not be assinged directly.
The speed of avg function is similar to sum function after enhancement.
Leverage gitattributes to enable auto convert end-of-line to LF when
checking in. Convert already exist CRLF to LF by removing all files and
checking out with new .gitattributes file. Except .gitattributes, all
files are only modified at the end of line.
