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Re: number to string conversion

From: "Freddy Villalba Arias" <fvillalba(at)madrid(dot)bilbomatica(dot)es>
To: "Freddy Villalba Arias" <fvillalba(at)madrid(dot)bilbomatica(dot)es>,"PostgreSQL JDBC Mailing List" <pgsql-jdbc(at)postgresql(dot)org>
Subject: Re: number to string conversion
Date: 2004-04-30 10:59:19
Message-ID: 92EFB0BEDD24E9419E2CD9A2BD35DAEA0313F3@bmsrv001.madrid.bilbomatica.es (view raw or flat)
Thread:
Lists: pgsql-jdbc
Hi everyvody,

 

Sorry. Didn't take me too long to find this:

 

SELECT

            p.*, (SELECT c.ccaa_ds_ccaa FROM CCAA c WHERE c.ccaa_id_ccaa
= p.prov_id_ccaa) as ds_ccaa

FROM

        PROVINCIA p

WHERE 

            (to_char(prov_id_ccaa, 'FM9999999999999999') = '1' OR 

                 '1' = '') AND 

                (upper(prov_ds_provincia) LIKE upper('%%') OR 

                 '' = '')

 

... which will do it for my 16-digit integer.

 

HOWEVER, it's quite awkward since you have to create a specific mask
depending on the precision of the numeric field.

 

Is there some way (maybe a unique mask) to convert any integer number to
string without having to know the precision?

 

Cheers,

Freddy.

 

-----Mensaje original-----
De: Freddy Villalba Arias 
Enviado el: viernes, 30 de abril de 2004 12:38
Para: PostgreSQL JDBC Mailing List
Asunto: [JDBC] number to string conversion

 

Hi everybody,

 

I wanted to do something like the following:

 

SELECT 

    p.*, (SELECT c.* FROM CCAA c WHERE c.ccaa_id_ccaa = p.prov_id_ccaa) 

FROM 

    PROVINCIA p 

WHERE 

     (prov_id_ccaa = '@@@id_ccaa@@@' OR '' = '@@@id_ccaa@@@') AND 

     (upper(prov_ds_provincia) LIKE upper('%@@@descripcion@@@%') OR
'@@@descripcion@@@' = '')

 

...where anything between "@@@" is a token that is replaced by some
value at runtime.

 

There is a particular case: null values. In those cases, you'd get a
query like this:

 

SELECT 

    p.*, (SELECT c.* FROM CCAA c WHERE c.ccaa_id_ccaa = p.prov_id_ccaa) 

FROM 

    PROVINCIA p 

WHERE 

     (prov_id_ccaa = '' OR '' = '') AND 

     (upper(prov_ds_provincia) LIKE upper('xxx') OR 'xxx' = '')

 

Being prov_id_ccaa a numeric column, in ORACLE and Access, this wouldn't
pose a problem, but it PostgreSQL it does (it throws the error: ERROR:
invalid input syntax for type numeric: ")

 

The only solution I can think of is converting prov_id_ccaa to a string
value (something like to_char in ORACLE, for instance)

 

How can I do that (in PostgreSQL)?

 

Can anybody else think of a better solution?

 

Regards,

Freddy.

pgsql-jdbc by date

Next:From: Oliver JowettDate: 2004-04-30 11:04:48
Subject: Re: number to string conversion
Previous:From: Freddy Villalba AriasDate: 2004-04-30 10:38:15
Subject: number to string conversion

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