You can use the TABLE() function to transform the members of an array into a set of rows. The signature is as follows:

TABLE(collection_value)

collection_value is an expression that evaluates to a value of collection type.

The TABLE() function expands the nested contents of a collection into a table format. You can use the TABLE() function anywhere you use a regular table expression.

The TABLE() function returns a SETOF ANYELEMENT (a set of values of any type). For example, if the argument passed to this function is an array of dates, TABLE() will return SETOF dates. If the argument passed to this function is an array of paths, TABLE() will return a SETOF paths.

You can use the TABLE() function to expand the contents of a collection into table form:

postgres=# SELECT * FROM TABLE(monthly_balance(445.00, 980.20, 552.00));

 monthly_balance
----------------
  445.00
  980.20
  552.00
(3 rows)