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

/**
 * The prober claims waiting candidates by kind from random points of the
 * queue (Prober.claim): by the id index alone a slice filtered ~700k rows for
 * the rarer kinds (0.37 s a slice, 20 slices and up to 5 tiers a claim, the
 * lanes waiting meanwhile; LOG.md 2026-10-12 (17)). Built concurrently.
 */
export default class extends BaseSchema {
  static disableTransactions = true

  async up() {
    this.schema.raw(`CREATE INDEX CONCURRENTLY IF NOT EXISTS probe_candidates_kind_waiting_idx ON probe_candidates (kind, id) WHERE status = 'waiting'`)
  }

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