-- Apply after 026, independently to every project business database.
-- Preserve job identity, deduplication and audit metadata, including legacy results.
ALTER TABLE workbench.calculation_jobs
    ADD COLUMN IF NOT EXISTS started_at timestamptz,
    ADD COLUMN IF NOT EXISTS finished_at timestamptz,
    ADD COLUMN IF NOT EXISTS queue_expires_at timestamptz,
    ADD COLUMN IF NOT EXISTS result_expires_at timestamptz;
UPDATE workbench.calculation_jobs SET queue_expires_at=created_at+interval '1 hour'
WHERE queue_expires_at IS NULL;
UPDATE workbench.calculation_jobs SET finished_at=updated_at
WHERE finished_at IS NULL AND status IN ('succeeded','failed','cancelled','timed_out','interrupted');
-- Give pre-deployment results a complete retention window, even on reruns.
UPDATE workbench.calculation_jobs SET result_expires_at=clock_timestamp()+interval '7 days'
WHERE result IS NOT NULL AND result_expires_at IS NULL;
ALTER TABLE workbench.calculation_jobs
    ALTER COLUMN queue_expires_at SET DEFAULT (clock_timestamp()+interval '1 hour'),
    ALTER COLUMN queue_expires_at SET NOT NULL;
CREATE INDEX IF NOT EXISTS calculation_jobs_queue_expiry
ON workbench.calculation_jobs(project_id,queue_expires_at) WHERE status='queued';
CREATE INDEX IF NOT EXISTS calculation_jobs_result_expiry
ON workbench.calculation_jobs(project_id,result_expires_at) WHERE result IS NOT NULL;