2010/8/9 Tom Lane <tgl@sss.pgh.pa.us>:
> Pavel Stehule <pavel.stehule@gmail.com> writes:
>> I am working on Grouping Sets support. The first issue is "cube"
>> keyword. Contrib module "cube" define a few functions "cube". So if we
>> want to continue in support this function, then "cube" have to be a
>> unreserved keyword. But then we have a gram conflict with mentioned
>> obsolete syntax. I am thinking so after removing add_missing_from this
>> syntax is useless. Without this feature we can clean a gramatic.
>
> That's a documented and useful feature. It's not going away. Even
> if it did go away, removing it wouldn't do a thing to solve grammar
> problems, because the grammar isn't involved in that.
This isn't a SQL feature and it coming from old times like "missing
from". Without this we can little bit simplify ParseFuncOrColumn.
But I don't know, if this can be a significant win. It is just obsolete.
Regards
Pavel
>
> regards, tom lane
>