Re: Temporary tables

Thanks to all of you for your suggestions. the problem is solved by creating a function

istableexist() that returns whether a table exist or not. the function is bellow.

CREATE FUNCTION istableexist(varchar) RETURNS bool AS '

 DECLARE

 BEGIN

     /* check the table exist in database and is visible*/
     PERFORM relname,relnamespace FROM pg_class
            WHERE relkind = ''r''
                  AND Upper(relname) = Upper($1)
                  AND pg_table_is_visible(oid);

     IF FOUND THEN
        RETURN TRUE;
     ELSE
        RETURN FALSE;
     END IF;
  
 END;'
 LANGUAGE 'plpgsql';

thanks again

jinujose