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

/**
 * release_inspections in the catalog's tablespace (default_tablespace: nvme
 * on homelab), not CHUNK_TABLESPACE: the prober writes it every flush and
 * the merger looks stems up in it (release_inspections_inner_stem_idx), so it
 * isn't only read per release any more (migration 1700). Its flushes took
 * 35–83 s a minute with the table on the HDD (LOG.md 2026-10-13 (43)).
 * Homelab was moved by hand first; here a no-op when it's there already, or
 * without a default tablespace (tests).
 */
export default class extends BaseSchema {
  async up() {
    this.defer(async (db) => {
      const { rows } = await db.rawQuery(
        `SELECT current_setting('default_tablespace') AS target,
                (SELECT t.spcname FROM pg_class c LEFT JOIN pg_tablespace t ON t.oid = c.reltablespace WHERE c.relname = 'release_inspections') AS current`
      )
      const { target, current } = rows[0]
      if (!target || current === target) return
      await db.rawQuery(`ALTER TABLE release_inspections SET TABLESPACE ${target}`)
      await db.rawQuery(`ALTER INDEX release_inspections_pkey SET TABLESPACE ${target}`)
    })
  }

  async down() {}
}