Hi, I wonder why there's no function to aggregate arrays by
concatenation out of the box?
There is a usual function `array_cat(anyarray, anyarray)`, but it
doesn't seamlessly work with grouping.
Wouldn't it be natural to have this:
CREATE AGGREGATE array_cat (anyarray)
(
sfunc = array_cat,
stype = anyarray,
initcond = '{}'
);
Thanks,
Vlad