[Tableau]: GROUP BY X with alias (as columnd name) and INNER JOIN

[kuba--]

Add support for this kind of queries:

SELECT SUBSTRING(`repositories`.`repository_id`, 1, 1024) AS `repository_id`
FROM `repositories`
  INNER JOIN `commits` ON (SUBSTRING(`repositories`.`repository_id`, 1, 1024) = SUBSTRING(`commits`.`repository_id`, 1, 1024))
  INNER JOIN `files` ON (`repositories`.`repository_id` = SUBSTRING(`files`.`repository_id`, 1, 1024))
GROUP BY 1

So far we get an error:

[MySQL][ODBC 5.3(w) Driver][mysqld-5.5.10-Vitess]unknown error: ambiguous column name "repository_id", it's present in all these tables: repositories, commits, files
SELECT SUBSTRING(`repositories`.`repository_id`, 1, 1024) AS `repository_id`
FROM `repositories`
  INNER JOIN `commits` ON (SUBSTRING(`repositories`.`repository_id`, 1, 1024) = SUBSTRING(`commits`.`repository_id`, 1, 1024))
  INNER JOIN `files` ON (`repositories`.`repository_id` = SUBSTRING(`files`.`repository_id`, 1, 1024))
GROUP BY 1