| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | John Naylor <john(dot)naylor(at)2ndquadrant(dot)com>, Mark Dilger <mark(dot)dilger(at)enterprisedb(dot)com>, Vik Fearing <vik(at)postgresfriends(dot)org>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: factorial function/phase out postfix operators? |
| Date: | 2020-08-27 14:04:04 |
| Message-ID: | 3029388.1598537044@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> Yeah, that looks like a good spot. I think we should also add
> something to the documentation of the factorial operator, mentioning
> that it will be going away. Perhaps we can advise people to write !!3
> instead of 3! for forward-compatibility, or maybe we should instead
> suggest numeric_fac(3).
Well, the !! operator itself has been "deprecated" for a long time:
regression=# \do+ !!
List of operators
Schema | Name | Left arg type | Right arg type | Result type | Function | Description
------------+------+---------------+----------------+-------------+-------------+---------------------------
pg_catalog | !! | | bigint | numeric | numeric_fac | deprecated, use ! instead
pg_catalog | !! | | tsquery | tsquery | tsquery_not | NOT tsquery
(2 rows)
I'm a bit inclined to kill them both off and standardize on factorial()
(not numeric_fac).
regards, tom lane
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