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* Fetching a single column from a record returning function
@ 2004-01-20 06:12 Kumar <sgnerd@yahoo.com.sg>
2004-01-20 15:58 ` Re: Fetching a single column from a record returning function Tom Lane <tgl@sss.pgh.pa.us>
2004-01-20 16:13 ` Re: Fetching a single column from a record returning function Joe Conway <mail@joeconway.com>
0 siblings, 2 replies; 4+ messages in thread
From: Kumar @ 2004-01-20 06:12 UTC (permalink / raw)
To: pgsql-sql
Hi Friends,
Postgres 7.3.4 on RH Linux 7.2
I am using a record variable inside a functions and fetch the result via the follow command
select * from .fn_email(1)
as (email_folder_id int4,email_folder_name varchar,descrip varchar,msgcount int8,unreadcount int8,size int8);
Is it possible to fetch only one column (the 'msgcount') from the function. Because I am interested in SUM(msgcount). Please shed some light.
Regards
kumar
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: Fetching a single column from a record returning function
2004-01-20 06:12 Fetching a single column from a record returning function Kumar <sgnerd@yahoo.com.sg>
@ 2004-01-20 15:58 ` Tom Lane <tgl@sss.pgh.pa.us>
2004-01-21 06:29 ` Re: Fetching a single column from a record returning function Kumar <sgnerd@yahoo.com.sg>
1 sibling, 1 reply; 4+ messages in thread
From: Tom Lane @ 2004-01-20 15:58 UTC (permalink / raw)
To: Kumar <sgnerd@yahoo.com.sg>; +Cc: pgsql-sql
"Kumar" <sgnerd@yahoo.com.sg> writes:
> select * from fn_email(1)
> as (email_folder_id int4,email_folder_name varchar,descrip varchar,msgcount
> int8,unreadcount int8,size int8);
> Is it possible to fetch only one column (the 'msgcount') from the function.=
> Because I am interested in SUM(msgcount). Please shed some light.
select sum(msgcount) from fn_email(1)
as (email_folder_id int4,email_folder_name varchar,descrip varchar,msgcount
int8,unreadcount int8,size int8);
regards, tom lane
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: Fetching a single column from a record returning function
2004-01-20 06:12 Fetching a single column from a record returning function Kumar <sgnerd@yahoo.com.sg>
2004-01-20 15:58 ` Re: Fetching a single column from a record returning function Tom Lane <tgl@sss.pgh.pa.us>
@ 2004-01-21 06:29 ` Kumar <sgnerd@yahoo.com.sg>
0 siblings, 0 replies; 4+ messages in thread
From: Kumar @ 2004-01-21 06:29 UTC (permalink / raw)
To: Tom Lane <tgl@sss.pgh.pa.us>; +Cc: pgsql-sql
Yes it worked. Thanks
----- Original Message -----
From: "Tom Lane" <tgl@sss.pgh.pa.us>
To: "Kumar" <sgnerd@yahoo.com.sg>
Cc: "psql" <pgsql-sql@postgresql.org>
Sent: Tuesday, January 20, 2004 9:28 PM
Subject: Re: [SQL] Fetching a single column from a record returning function
> "Kumar" <sgnerd@yahoo.com.sg> writes:
> > select * from fn_email(1)
> > as (email_folder_id int4,email_folder_name varchar,descrip
varchar,msgcount
> > int8,unreadcount int8,size int8);
>
> > Is it possible to fetch only one column (the 'msgcount') from the
function.=
> > Because I am interested in SUM(msgcount). Please shed some light.
>
> select sum(msgcount) from fn_email(1)
> as (email_folder_id int4,email_folder_name varchar,descrip
varchar,msgcount
> int8,unreadcount int8,size int8);
>
> regards, tom lane
>
> ---------------------------(end of broadcast)---------------------------
> TIP 7: don't forget to increase your free space map settings
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: Fetching a single column from a record returning function
2004-01-20 06:12 Fetching a single column from a record returning function Kumar <sgnerd@yahoo.com.sg>
@ 2004-01-20 16:13 ` Joe Conway <mail@joeconway.com>
1 sibling, 0 replies; 4+ messages in thread
From: Joe Conway @ 2004-01-20 16:13 UTC (permalink / raw)
To: Kumar <sgnerd@yahoo.com.sg>; +Cc: pgsql-sql
Kumar wrote:
> select * from .fn_email(1) as (email_folder_id int4,email_folder_name
> varchar,descrip varchar,msgcount int8,unreadcount int8,size int8);
>
> Is it possible to fetch only one column (the 'msgcount') from the
> function. Because I am interested in SUM(msgcount). Please shed some
> light.
What's wrong with:
select msgcount from fn_email(1)
as (email_folder_id int4,email_folder_name varchar,descrip
varchar,msgcount int8,unreadcount int8,size int8);
?
Try showing us more detail about what you want to do and why it isn't
currently working.
Joe
^ permalink raw reply [nested|flat] 4+ messages in thread
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2004-01-20 06:12 Fetching a single column from a record returning function Kumar <sgnerd@yahoo.com.sg>
2004-01-20 15:58 ` Tom Lane <tgl@sss.pgh.pa.us>
2004-01-21 06:29 ` Kumar <sgnerd@yahoo.com.sg>
2004-01-20 16:13 ` Joe Conway <mail@joeconway.com>
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