> Franklin Haut wrote:
>
> Hi all,
>
> i have a problem with one update sentence sql.
>
> example to produce:
>
> create table temp (num integer primary key, name varchar(20));
>
> insert into temp values (1, 'THE');
> insert into temp values (2, 'BOOK');
> insert into temp values (3, 'IS');
> insert into temp values (4, 'ON');
> insert into temp values (5, 'THE');
> insert into temp values (6, 'RED');
> insert into temp values (7, 'TABLE');
>
Couldn't figure out how to do it in one sentence, still it can be done with
a function:
CREATE OR REPLACE FUNCTION insert_value(p_num integer, p_name varchar(20))
RETURNS VOID AS
$$
declare v_num integer;
BEGIN FOR v_num in SELECT num FROM temp WHERE num >= p_num ORDER BY num DESC
LOOP UPDATE temp SET num = num + 1 WHERE num = v_num; END LOOP; INSERT INTO temp VALUES (p_num, p_name);
END;
$$
LANGUAGE 'plpgsql' VOLATILE;
To run it:
sistema=# select insert_value(4, 'NOT');insert_value
--------------
(1 row)
sistema=# select * from temp order by num;num | name
-----+------- 1 | THE 2 | BOOK 3 | IS 4 | NOT 5 | ON 6 | THE 7 | RED 8 | TABLE
(8 rows)
Regards,
Fernando.
