Re: variable substitution in SQL commands

bill house <wchouse@bellsouth.net> writes:
> I am trying to learn how to construct SQL commands using information
> derived from other SQL commands/querys.
> These commands are stored for the moment in a simple text file which
> would be executed by the psql client like so:
>     current_database=# \i sql_command_file.sql

This is really getting beyond what you can do usefully with a simple
psql text file.  My first suggestion would be to see if you can write
what you need as a plpgsql function.

            regards, tom lane