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

/**
 * The prober's start puts a previous run's claims back (PendingLadder.release: status 9 → 0), which scanned the
 * 58M-row pending table on the HDD for 20+ minutes after every deploy (LOG.md (130)): a partial index on the few
 * taken rows makes it instant.
 */
export default class extends BaseSchema {
  static disableTransactions = true

  async up() {
    this.schema.raw(
      `CREATE INDEX CONCURRENTLY IF NOT EXISTS pending_releases_taken_idx ON pending_releases (release_key) WHERE status = 9`
    )
  }

  async down() {
    this.schema.raw(`DROP INDEX CONCURRENTLY IF EXISTS pending_releases_taken_idx`)
  }
}