Re: sql function: using set as argument

Thanks! Thomas

Actually I am going to use many functions for different counts and a
wrapper function to return all count in one shot. My function1 is going
to be a part of all count functions. If I use it as sub query in all the
functions, performance degrades drastically, as my query of finction1 is
also heavy.

My wrapper function is going to look like:
Get_all_counts()
Select count1(result_set_of_finction1, int,
int), count2(result_set_of_finction1, int, int),
count3(result_set_of_finction1, int, int)...


Regards,

akshay

---------------------------------------
Akshay Mathur
SMTS, Product Verification
AirTight Networks, Inc. ( <http://www.airtightnetworks.net/>
www.airtightnetworks.net)
O: +91 20 2588 1555 ext 205
F: +91 20 2588 1445

-----Original Message-----
From: Thomas F. O'Connell [mailto:tfo(at)sitening(dot)com]
Sent: Tuesday, August 16, 2005 3:39 AM
To: Akshay Mathur
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: [SQL] sql function: using set as argument

Is there a reason not to build it in as a sub-query?

E.g., if you have a function get_count( int ):

SELECT count(b_column)
FROM some_table
WHERE some_field_1 in (
SELECT a_column
FROM a_table
WHERE some_condition
)
AND some_field_2 = $2;

--
Thomas F. O'Connell
Co-Founder, Information Architect
Sitening, LLC

Strategic Open Source: Open Your iT

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On Aug 10, 2005, at 9:30 AM, Akshay Mathur wrote:

Hi,

I have a function that returns a set.
Looks like:
Select a_column from a_table where some_condition;

I want to use output of this function as an argument of another function
Second looks like:
Get_count(result_set_of_function_1, int)
Select count(b_column) from
some_table where some_field_1 in ($1) and some_field_2 = $2;

Please suggest how can I do that?

Regards,

akshay


---------------------------------------
Akshay Mathur
SMTS, Product Verification
AirTight Networks, Inc. ( <http://www.airtightnetworks.net/>
www.airtightnetworks.net)
O: +91 20 2588 1555 ext 205
F: +91 20 2588 1445