Example 1: Function to return the row count of a table:
CREATE FUNCTION get_row_count(v_table) RETURNS int AS $$ DECLARE v_count int; select count(*) into v_count from v_table; RETURN v_count; END; $$ LANGUAGE plpgsql;
Call the function as below where table_name is the name of the table for which you would like to return the row count.
Example 2: Function to return the person name for an id:
CREATE FUNCTION get_person_name(v_id) RETURNS varchar(50) AS $$ DECLARE v_name varchar(50); select first_name||' '||last_name into v_name from person where id=v_id; RETURN v_name; END; $$ LANGUAGE plpgsql;
Call function as below where ‘id’ is the employee id of the employee that you would like to return the name for.