On 12/22/2014 02:34 PM, Tom Lane wrote:
Andrew Dunstan <[email protected]> writes:
Fix documentation of argument type of json_agg and jsonb_agg
json_agg was originally designed to aggregate records. However, it soon
became clear that it is useful for aggregating all kinds of values and
that's what we have on 9.3 and 9.4, and in head for it and jsonb_agg.
The documentation suggested otherwise, so this fixes it.
Claiming that the argument type is "expression" is not a fix. I don't
mind using that terminology in the first table column, but the second
column is supposed to be the truth not handwaving.
The actual declaration of the argument type is "anyelement", and I think
we use that to document other such functions.
Oh, I thought I had seen "expression" there. It looks like we're using
"any" elsewhere, so I'll use that. While I'm at it I'll remove the quote
marks around the arguments to json_object_agg().
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