Group by alias (alias name is the same as column name)

[kuba--]

If alias is a column name then group by queries doesn't work:

SELECT commit_hash AS `commit_hash` FROM commits GROUP BY commit_hash;

SELECT SUBSTRING(`commits`.`commit_hash`, 1, 1024) AS `commit_hash` FROM commits GROUP BY commit_hash;

we get an error: unknown error: table "commits" does not have column "commit_hash"

if we change alias name to something else, e.g.:
SELECT commit_hash AS foo FROM commits GROUP BY foo;

Everything works fine.