Re: Return types of a function

Nalin Bakshi <nbakshi(at)bisil(dot)com> schrieb:

>
> Hi!
> I have postgres installed in my machine and have a simple task to do.
> Step1) Fetch all the tables in the Database with name staerting with "AA"
> Step2) On each table you get fire a simple SQL query:
> select * from <tablename>;
> Step3) Right these into a flat file.
> I have to carry out all these steps using a prcedure/function.

,----
| create or replace function do_select(varchar) returns varchar as $$
| declare
| tab record;
| sql varchar;
| file varchar;
| begin
| for tab in select table_name from information_schema.tables where table_name ~ $1 loop
| file := quote_literal('/tmp/' || tab.table_name);
| sql := 'copy ' || tab.table_name || ' to ' || file || '; ';
| raise notice '%', sql;
| execute sql;
| end loop;
| return 'ready';
| end;
| $$ language plpgsql;
`----

test=# select do_select('^foo*');
NOTICE: copy foo1 to '/tmp/foo1';
NOTICE: copy foo to '/tmp/foo';
do_select
-----------
ready
(1 row)

HTH, Andreas
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