Re: Splitting text column to multiple rows

> CREATE OR REPLACE FUNCTION unnest(anyarray)
> RETURNS SETOF anyelement as $$
>  SELECT $1[i] FROM generate_series(1,4) g(i)
> $$ LANGUAGE sql;
>
> pavel@postgres:5481=# select unnest(string_to_array('23,2,3,4,5',','));

I tried code below. Order of rows in result is different from the order of
elements in string.
How to preserve element order ?

Andrus.


create temp table person2 ( id char(9)) on commit drop;
insert into person2 values ('9'),('8');
CREATE OR REPLACE FUNCTION unnest(anyarray)
RETURNS SETOF anyelement as $$
  SELECT $1[i] FROM generate_series(1,4) g(i)
$$ LANGUAGE sql;

select * from (select unnest(string_to_array('9,23,8,7,4,5',',')) ) xx,
person2
order by id;