[SOLVED] Postgres function with list argument and in clause

Issue

How to create a function which takes as argument integer[] parameter and executing query with IN clause with this parameter in loop.
In loop I want execute next select and result of this query I would like return.

Something like that:

CREATE OR REPLACE FUNCTION function_which_i_want(my_argument integer[]) RETURNS my_schema_and_table[] AS
$BODY$
DECLARE
result my_schema_and_table[];
BEGIN
FOR l IN SELECT * FROM table2 WHERE id in (my_argument) LOOP
SELECT * FROM my_schema_and_table;
END LOOP;
END;
...

I want to get union of each select in loop. one huge joined result.
Is this possible? Please help.

Solution

CREATE OR REPLACE FUNCTION function_which_i_want(my_argument integer[])
RETURNS my_schema_and_table[] AS
$BODY$
DECLARE
result my_schema_and_table[];
BEGIN

for l in 
    select t.*
    from
        table2 t
        inner join
        unnest(my_argument) m(id) on m.id = t.id
loop
    SELECT * FROM my_schema_and_table;
END LOOP;
END;

Answered By – Clodoaldo Neto

Answer Checked By – David Goodson (BugsFixing Volunteer)