Table Functions
Table functions are methods for constructing tables.
You can use table functions in:
FROM clause of the
SELECT
query.The method for creating a temporary table that is available only in the current query. The table is deleted when the query finishes.
CREATE TABLE AS table_function() query.
It's one of the methods of creating a table.
INSERT INTO TABLE FUNCTION query.
Note
You can’t use table functions if the allow_ddl setting is disabled.