Обсуждение: Stored procedure doesn't return expected result.

I'm writing a script to clean up some data in a table, the data I'm
using as the source is held in emails, so I've written a perl script
to extract the info. Unfortunatly this email doesn't contain the
client id, so I've written a stored procedure to extract it.

create or replace function get_client_id(text) returns integer as $$
SELECT intclientid FROM client WHERE vchname = '$1';
$$ LANGUAGE SQL;

However, when I do this:

select get_client_id('Stuart Grimshaw');

I get no results, yet:

SELECT intclientid FROM client WHERE vchname = 'Stuart Grimshaw';

Gives me the result I would expect:

 intclientid
-------------
           3

What am I doing wrong in the stored procedure?

--
-S
http://www.makepovertyhistory.org/

Stuart Grimshaw <stuart.grimshaw@gmail.com> schrieb:

> I'm writing a script to clean up some data in a table, the data I'm
> using as the source is held in emails, so I've written a perl script
> to extract the info. Unfortunatly this email doesn't contain the
> client id, so I've written a stored procedure to extract it.
>
> create or replace function get_client_id(text) returns integer as $$
> SELECT intclientid FROM client WHERE vchname = '$1';
> $$ LANGUAGE SQL;
>
> However, when I do this:
>
> select get_client_id('Stuart Grimshaw');
>
> I get no results, yet:

Please read our documentation about executing dynamic commands:
http://www.postgresql.org/docs/8.1/interactive/plpgsql-statements.html#PLPGSQL-STATEMENTS-EXECUTING-DYN


HTH, Andreas
--
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect.                              (Linus Torvalds)
"If I was god, I would recompile penguin with --enable-fly."    (unknow)
Kaufbach, Saxony, Germany, Europe.              N 51.05082°, E 13.56889°

Stuart Grimshaw <stuart.grimshaw@gmail.com> schrieb:

> I'm writing a script to clean up some data in a table, the data I'm
> using as the source is held in emails, so I've written a perl script
> to extract the info. Unfortunatly this email doesn't contain the
> client id, so I've written a stored procedure to extract it.
>
> create or replace function get_client_id(text) returns integer as $$
> SELECT intclientid FROM client WHERE vchname = '$1';
                                                 ^  ^

remove the '

test=# select * from foo1;
 x | i
---+---
 a | 1
 b | 2
(2 rows)

test=# create or replace function get_i(varchar) returns int as $$
select i from foo1 where x = $1;$$ language sql;
CREATE FUNCTION
test=# select get_i('a');
 get_i
-------
     1
(1 row)



HTH, Andreas
--
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect.                              (Linus Torvalds)
"If I was god, I would recompile penguin with --enable-fly."    (unknow)
Kaufbach, Saxony, Germany, Europe.              N 51.05082°, E 13.56889°

On 2/26/06, Andreas Kretschmer <akretschmer@spamfence.net> wrote:
> Stuart Grimshaw <stuart.grimshaw@gmail.com> schrieb:
>
> > I'm writing a script to clean up some data in a table, the data I'm
> > using as the source is held in emails, so I've written a perl script
> > to extract the info. Unfortunatly this email doesn't contain the
> > client id, so I've written a stored procedure to extract it.
> >
> > create or replace function get_client_id(text) returns integer as $$
> > SELECT intclientid FROM client WHERE vchname = '$1';
>                                                  ^  ^
>
> remove the '
>
> test=# select * from foo1;
>  x | i
> ---+---
>  a | 1
>  b | 2
> (2 rows)
>
> test=# create or replace function get_i(varchar) returns int as $$
> select i from foo1 where x = $1;$$ language sql;
> CREATE FUNCTION
> test=# select get_i('a');
>  get_i
> -------
>      1
> (1 row)

That's got it. Obviously it understands that $1 is a string and not a
column name.

Thanks very much.

--
-S
http://www.makepovertyhistory.org/