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* Variable number or arguments to a function possible?
@ 2009-04-25 02:04 Chris Ruprecht <chris@ruprecht.org>
0 siblings, 2 replies; 3+ messages in thread
From: Chris Ruprecht @ 2009-04-25 02:04 UTC (permalink / raw)
To: pgsql-sql
Hello everybody,
Is it possible to create a function that can take a variable number of
arguments?
I would like to write a function that creates a new record in the
database. Based on what I send it, it should create a record in the
appropriate table.
Simple pseudo-code example:
... function create_record( varchar [,...] ) returns bigint as
if $1 = 'state' then insert into state ( $2, $3 ) // $2 being state
name, and $3 state code
if $1 = 'phone' then insert into phone ( $4::bigint, $2, $3 ) // $2 =
phone number, $3 = phone type, $4 = id of person that ownes the phone
and so on.
How would I declare that function?
Thanks.
best regards,
chris
--
chris ruprecht
database grunt and bit pusher extraordinaíre
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Variable number or arguments to a function possible?
@ 2009-04-25 03:08 Milen A. Radev <milen@radev.net>
parent: Chris Ruprecht <chris@ruprecht.org>
1 sibling, 0 replies; 3+ messages in thread
From: Milen A. Radev @ 2009-04-25 03:08 UTC (permalink / raw)
To: pgsql-sql
Chris Ruprecht написа:
> Hello everybody,
>
> Is it possible to create a function that can take a variable number of
> arguments?
> I would like to write a function that creates a new record in the
> database. Based on what I send it, it should create a record in the
> appropriate table.
>
> Simple pseudo-code example:
>
> ... function create_record( varchar [,...] ) returns bigint as
>
> if $1 = 'state' then insert into state ( $2, $3 ) // $2 being state
> name, and $3 state code
> if $1 = 'phone' then insert into phone ( $4::bigint, $2, $3 ) // $2 =
> phone number, $3 = phone type, $4 = id of person that ownes the phone
>
> and so on.
>
> How would I declare that function?
You'll be able to do that (or something similar) in the next, still
in beta, version 8.4
(http://www.postgresql.org/docs/8.4/static/xfunc-sql.html#XFUNC-SQL-VARIADIC-FUNCTIONS),
but right now the closest to what you want is function overloading
(http://www.postgresql.org/docs/current/static/xfunc-overload.html).
--
Milen A. Radev
^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: Variable number or arguments to a function possible?
@ 2009-04-25 03:09 Tom Lane <tgl@sss.pgh.pa.us>
parent: Chris Ruprecht <chris@ruprecht.org>
1 sibling, 0 replies; 3+ messages in thread
From: Tom Lane @ 2009-04-25 03:09 UTC (permalink / raw)
To: Chris Ruprecht <chris@ruprecht.org>; +Cc: pgsql-sql
Chris Ruprecht <chris@ruprecht.org> writes:
> Is it possible to create a function that can take a variable number of
> arguments?
No, but you can make it take an array and then write something like
myfunc(array[x, y, ...])
8.4 will have some syntactic sugar that looks like variable numbers of
arguments, but it's reducing to the above underneath.
regards, tom lane
^ permalink raw reply [nested|flat] 3+ messages in thread
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2009-04-25 02:04 Variable number or arguments to a function possible? Chris Ruprecht <chris@ruprecht.org>
2009-04-25 03:08 ` Milen A. Radev <milen@radev.net>
2009-04-25 03:09 ` Tom Lane <tgl@sss.pgh.pa.us>
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