plpgsql - selecting array of multiple columns - postgresql

Question

I am trying to create procedure which selects data, processes and returns them, but I am struggling how to define array variable for multiple columns.
This works:
CREATE OR REPLACE FUNCTION testing_array_return()
RETURNS TABLE(id BIGINT) AS
$body$
DECLARE
l_rows BIGINT[];
BEGIN
-- select data using for update etc
l_rows := ARRAY(
SELECT 1 AS id
UNION
SELECT 2 AS id
);
-- do some stuff
-- return previously selected data
RETURN QUERY
SELECT *
FROM UNNEST(l_rows);
END;
$body$
LANGUAGE 'plpgsql'
But I want to do this for 2 or more columns without using composite type or rowtype:
CREATE OR REPLACE FUNCTION testing_array_return()
RETURNS TABLE(id BIGINT, text VARCHAR2) AS
$body$
DECLARE
l_rows -- what should I put here?
BEGIN
-- select data using for update etc
l_rows := ARRAY(
SELECT 1 AS id, 'test' AS text
UNION
SELECT 2 AS id, 'test2' AS text
);
-- do some stuff
-- return previously selected data
RETURN QUERY
SELECT *
FROM UNNEST(l_rows);
END;
$body$
LANGUAGE 'plpgsql'
In oracle I could define record type and then table type of it, but I can't find how to do this in postgres. Maybe using wrong keywords when searching...
edit: this is how I would do this in Oracle (without returning).
DECLARE
TYPE t_row IS RECORD(
id NUMBER
,text VARCHAR2(10));
TYPE t_tbl IS TABLE OF t_row;
l_rows t_tbl := t_tbl(); --how to do this in postgres?
BEGIN
SELECT *
BULK COLLECT
INTO l_rows
FROM (SELECT 1 AS id
,'test' AS text
FROM dual
UNION ALL
SELECT 2 AS id
,'test' AS text
FROM dual);
END;
Anything similiar in postgres? Like record but for array.

Answer 1

You would do the same in Postgres:
Create the record type:
create type footype as (id bigint, text_ varchar);
Then use an array of that type in your function:
CREATE OR REPLACE FUNCTION testing_array_return()
RETURNS TABLE(id BIGINT, text VARCHAR) AS
$body$
DECLARE
l_rows footype[];
BEGIN
-- select data using for update etc
l_rows := ARRAY(
SELECT (1, 'test')
UNION
SELECT (2, 'test2')
);
-- do some stuff
-- return previously selected data
RETURN QUERY
SELECT *
FROM UNNEST(l_rows);
END;
$body$
LANGUAGE plpgsql;
Online example: http://rextester.com/UMRZFO54266
The expression (1, 'test') creates a single value of record type. As that is assigned to a typed variable, there is no need to alias the columns (and in fact you can't do that anyway).
Unrelated, but: the language name is an identifier. Do not put that in single quotes.
Note that text is also a keyword in Postgres because it's a data type. You shouldn't use it as a column name