James Taylor created PHOENIX-1768:
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Summary: GROUP BY should support column position as well as column
alias
Key: PHOENIX-1768
URL: https://issues.apache.org/jira/browse/PHOENIX-1768
Project: Phoenix
Issue Type: Bug
Reporter: Serhiy Bilousov
In postgreSQL (and many others DBs) you can specify not only column name for
the ORDER BY and GROUP BY but column number (position in SELECT part) as well
as column alias.
see:
http://www.postgresql.org/docs/9.4/static/queries-order.html
http://www.postgresql.org/docs/9.4/static/sql-select.html#SQL-GROUPBY
Adding such support would be very helpful and sometimes necessary.
I can provide real queries example if required but basically we want something
like this
given query
SELECT a, b, TRUNC(current_date(),'HOUR') AS date_truncated FROM table
we want
ORDER BY 1 ASC, 2 DESC
ORDER BY date_truncated
and same for GROUP_BY
Having just column number would cover both but having column alias would make
queries more readable and human friendly. Plus make it one little stem closer
to postgreSQL and SQL standard.
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