Re: How can I use parameters in plain sql

2010/9/3 Merlin Moncure <mmoncure(at)gmail(dot)com>:
> On Fri, Sep 3, 2010 at 3:47 PM, John Adams <john_adams_mail(at)yahoo(dot)com> wrote:
>>> psql has some client side manged variables, and you can of course use
>>> pl/pgsql.
>> Do you mean I should use a pl/pgsql stored procedure or do I have to somehow
>> mark the sql as pl/pgsql? How?
>> Because in sql server it is all the same i.e. plain sql=tsql
>
> pl/pgsql is only used in functions:
>
> create function foo(i int) returns setof mytable as
> $$
> begin
>  return query select * from mytable where id = i;
> end;
> $$ language plpgsql;
>
> then
>
>
> plpgsql is reserved for fancy things that are tricky to do with plain
> sql.  it's got loops, robust error handling, etc.
>
> http://www.postgresql.org/docs/8.4/static/plpgsql.html
>

Also, in PostgreSQL 9.0 you can have anonymous code blocks with 'DO'.
http://www.postgresql.org/docs/9.0/static/sql-do.html

--
Cédric Villemain               2ndQuadrant
http://2ndQuadrant.fr/     PostgreSQL : Expertise, Formation et Support