[GENERAL] Will there be a JSON operator like - but returning numeric?

2014-09-23 Thread Seamus Abshere

hi,

I've got use cases like


array_remove(array_agg((a-'b')::float), NULL)


It would be nice to replace (a-'b')::float with something like


a-^'b'


that directly returned a numeric... is that in the cards?

Thanks,
Seamus


--
Seamus Abshere, SCEA
https://github.com/seamusabshere


--
Sent via pgsql-general mailing list (pgsql-general@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general


Re: [GENERAL] Will there be a JSON operator like - but returning numeric?

2014-09-23 Thread Tom Lane
Seamus Abshere sea...@abshere.net writes:
 I've got use cases like
 array_remove(array_agg((a-'b')::float), NULL)
 It would be nice to replace (a-'b')::float with something like
 a-^'b'
 that directly returned a numeric... is that in the cards?

I believe we discussed this, along with variants to return boolean
etc, and concluded that it was not really worth doing.  For one
thing, it's hard to see how to pick reasonably mnemonic operator
names.  The cast syntax may be a bit more verbose but at least
it's pretty self-documenting.

Of course, you're free to create custom operators or functions
for your own use ...

regards, tom lane


-- 
Sent via pgsql-general mailing list (pgsql-general@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general