-- Apply independently to each project's business database.
CREATE SCHEMA IF NOT EXISTS workbench;
CREATE TABLE IF NOT EXISTS workbench.calculation_jobs (
    job_id uuid PRIMARY KEY,
    project_id uuid NOT NULL,
    owner_user_id uuid NOT NULL,
    request_key text NOT NULL,
    tool text NOT NULL,
    parameters jsonb NOT NULL,
    binding jsonb NOT NULL,
    timeout_seconds integer NOT NULL CHECK (timeout_seconds BETWEEN 1 AND 86400),
    status text NOT NULL DEFAULT 'queued' CHECK (status IN
      ('queued','running','cancel_requested','succeeded','failed','cancelled','timed_out','interrupted')),
    result jsonb,
    error jsonb,
    lease_generation bigint NOT NULL DEFAULT 0,
    lease_owner text,
    lease_expires_at timestamptz,
    created_at timestamptz NOT NULL DEFAULT clock_timestamp(),
    updated_at timestamptz NOT NULL DEFAULT clock_timestamp(),
    UNIQUE(project_id,owner_user_id,request_key)
);
CREATE INDEX IF NOT EXISTS calculation_jobs_queue ON workbench.calculation_jobs(project_id,status,created_at);