Idempotent PostgreSQL DDL scripts

Question

I\'m looking for a way to script postgreSQL schema changes in an idempotent manner.

In MSSQL I could do something like this:

if(not exists(select * from          


        

Answer 1

You should be able to use plpgsql:

create language plpgsql;
create function f() ... as $$

$$language plpgsql;
select f();