Introduction
Side-effects in functions
Invoking functions
Instruction
Well done! The most straightforward way to invoke a function is by using a SELECT statement.
The example below shows how to call the add_event() function using a SELECT statement:
SELECT add_event(smallint '1', 'PostgreSQL Conference', 'London');
This is in contrast to invoking a function within another function. Here, we've called the function via a console window, not in the code.
Exercise
Write a SELECT statement to call the add_topic() function which will insert a new topic with the name 'Quick cakes'.
