import { BaseSchema } from '@adonisjs/lucid/schema'

/**
 * worker_cursors.key: a tie-breaker after `at`. The par2 pruner's cursor was a timestamp alone, read back to the
 * millisecond: 20,000 sets of one prober flush share created_at 2026-10-15 14:38:39.883984, and every round took the
 * same batch again (LOG.md 2026-10-17 (73)). Now (at to the microsecond, set_id).
 */
export default class extends BaseSchema {
  async up() {
    this.schema.raw(`ALTER TABLE worker_cursors ADD COLUMN IF NOT EXISTS key text`)
  }

  async down() {
    this.schema.raw(`ALTER TABLE worker_cursors DROP COLUMN IF EXISTS key`)
  }
}