Re: Creating DB programmatically?

Step 1 connect to user using maintenance db "ie postgres"
Step 2 check whether database exists or not "SELECT 1 AS result FROM
pg_database
WHERE datname='abc'"
Step 3 if not run "create database ...."

simple..

On 12 July 2011 17:14, Frank Bax <fbax(at)sympatico(dot)ca> wrote:

> On 07/12/11 03:31, Roy's Email wrote:
>
>> Now I am particularly confused. How do I issue "CREATE DATABASE ..."
>> from my program? I thought that I needed a connection (PGconn) before I
>> could execute a command and I don't believe I have a valid connection if
>> my attempt to connect to a (non-existent) DB fails. [Does it change
>> anything that I'm writing in C++ and using the 'libpq' interface?]
>>
>
>
>
> Let's assume for the moment; that you know how to connect to an existing
> database and execute an SQL command like "SELECT ....".
>
> Simply modify your code:
> * change your connect command so it connects to "template1"
> * change your "SELECT ..." statement to "CREATE DATABASE ..."
> * close the connection and make a connection to database just created.
>
>
>
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