Re: How can i pass variable in dblink_connect_u ?

From: aditya desai <admad123(at)gmail(dot)com>
To: Joe Conway <mail(at)joeconway(dot)com>
Cc: pgsql-sql <pgsql-sql(at)lists(dot)postgresql(dot)org>
Subject: Re: How can i pass variable in dblink_connect_u ?
Date: 2022-02-03 11:38:17
Message-ID: CAN0SRDHFGFPZE_QN0pUnLZ53qOgf7R70UrL4XJnjLMAwoDBNxw@mail.gmail.com
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Thanks Joe

On Tue, Feb 1, 2022 at 7:11 PM Joe Conway <mail(at)joeconway(dot)com> wrote:

> On 2/1/22 05:42, aditya desai wrote:
> > Hi All,
> > how can I pass variables in dblink_connect_u ?
> >
> > Current code hardcoded DB name:
> > perform * from dblink_connect_u('myconn','dbname=mydb');
> >
> > Expected:
> > databasename=current_database();
> > perform * from dblink_connect_u('myconn','dbname=databasename');
> >
> > databasename is getting considered as text.
>
> Correct, it is a string literal. So just create the string literal using
> string manipulation functionality -- e.g.:
>
> SELECT
> dblink_connect_u('myconn','dbname=' ||
> current_database());
> dblink_connect_u
> ------------------
> OK
> (1 row)
>
> HTH,
>
> Joe
>
> --
> Crunchy Data - http://crunchydata.com
> PostgreSQL Support for Secure Enterprises
> Consulting, Training, & Open Source Development
>

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