Job#alter_job

[jonatas]

I'm just looking around and learning with @intermittentnrg use cases, and it seems a useful scenario:

https://github.com/intermittentnrg/intermittent-importers/blob/d2bb428afc85c05d0e62efd12b53a685b2615c11/app/models/generation_unit.rb#L7-L16

  def self.enable_compression_policy!
    connection.execute <<~SQL
      SELECT alter_job((SELECT job_id FROM timescaledb_information.jobs WHERE proc_name='policy_compression' AND hypertable_name = '#{self.table_name}'), scheduled => true);
    SQL
  end
  def self.disable_compression_policy!
    connection.execute <<~SQL
      SELECT alter_job((SELECT job_id FROM timescaledb_information.jobs WHERE proc_name='policy_compression' AND hypertable_name = '#{self.table_name}'), scheduled => false);
    SQL
  end

Which can also be translated as:

 def self.enable_compression_policy!
   self.hypertable.jobs.compression.select("job_id").each(&:enable!)
end

The method enable! can be implemented directly from the Job model, and we can have a few scenarios like:

Timescaledb.alter_job(job_id, **args)
Job.find(job_id).alter_job(**args)

Then, on the job_level we can have:

def enable!
  alter_job(scheduled: true)
end
def disable!
  alter_job(scheduled: false)
end