Re: Postgresql 9.5 and Shell scripts/variables vs. C programming/defining a value to be used

My goal is to grap a user from the OS and and substitute the grapped user -
to be the owner of the database - in the sql commands
e.g using shell-script substitution syntax:
create user ${user} with login;
create tablespace ${user} location '/path/${user)';
create database ${user} owner ${user} on tablespace ${user};
I would be surpriced if this should not be possible using gnu gcc but I
might be wrong. It is just a question of figurering out way to do this.
http://zetcode.com/db/postgresqlc/ has an example of how to do this using
integer as argument on
the commandline.
Do you have a hint of the substitution syntax to be used in gnu gcc.

Thanks.

/Poul

2016-11-23 16:44 GMT+01:00 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>:

> "David G. Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> writes:
> > On Wed, Nov 23, 2016 at 3:46 AM, Poul Kristensen <bcc5226(at)gmail(dot)com>
> wrote:
> >> In the postgresql.log I get "select datname from $1".
>
> > ​That is expected when you parameterize a query - the query string
> includes
> > parameter​s instead of values.
>
> It looks like Poul is hoping to use a parameter as a table name,
> which doesn't work. Parameters can only represent values (constants).
>
> regards, tom lane
>

--
Med venlig hilsen / Best regards
Poul Kristensen
Linux-OS/Virtualizationexpert and Oracle DBA