Major Description
Recently, I have been working on TAJO-554, and I found that we should allow two or more same columns in a schema to handle the asterisk properly.
My try in TAJO-554 is rewriting asterisks with their relations' schemas. So, the resulting schema can contain multiple same columns. Here is an example.
postgres=# select n_name, n_nationkey+10, *, n_regionkey from nation;
n_name | ?column? | n_nationkey | n_name | n_regionkey | n_comment | n_regionkey
---------------------------+----------+-------------+---------------------------+-------------+--------------------------------------------------------------------------------------------------------------------+-------------
ALGERIA | 10 | 0 | ALGERIA | 0 | haggle. carefully final deposits detect slyly agai | 0
ARGENTINA | 11 | 1 | ARGENTINA | 1 | al foxes promise slyly according to the regular accounts. bold requests alon | 1