Database table design for scheduling tasks

Question

I want to be able to create schedules that can be executed based on a fixed date, repeated daily, repeated on a particular day of the week, repeated on a particular month of

Answer 1

You could start with a simple table with the following generic schema for storing schedules (PostgreSQL). Consider every instance of a schedule run termed as a "job".

CREATE TABLE Schedule (
    id SERIAL UNIQUE,                      -- unique identifier for the job
    name varchar(64) NOT NULL,             -- human readable name for the job
    description text,                      -- details about the job
    schedule varchar(64) NOT NULL,         -- valid CRON expression for the job schedule
    handler varchar(64) NOT NULL,          -- string representing handler for the job
    args text NOT NULL,                    -- arguments for the job handler
    enabled boolean NOT NULL DEFAULT TRUE, -- whether the job should be run
    created_at timestamp NOT NULL,         -- when was the job created
    updated_at timestamp NOT NULL,         -- when was the job updated
    start_date timestamp,                  -- job should not run until this time
    end_date timestamp,                    -- job should not run after this time
    last_triggered_at timestamp,           -- when was the job last triggered
    meta json                              -- additional metadata for the job 
);