Re: array_agg and array_accum (patch)

Jeff Davis wrote:
> Here's an updated patch for just array_accum() with some simple docs.

I have committed a "best of Robert Haas and Jeff Davis" array_agg() 
function with standard SQL semantics.  I believe this gives the best 
consistency with other aggregate functions for the no-input-rows case. 
If some other behavior is wanted, it is a coalesce() away, as the 
documentation states.