ALTER TABLE "materials"
ADD COLUMN IF NOT EXISTS "is_ai_generated" BOOLEAN NOT NULL DEFAULT false;

DO $$
BEGIN
  IF EXISTS (
    SELECT 1
    FROM information_schema.tables
    WHERE table_schema = 'public'
      AND table_name = 'external_material_import_jobs'
  ) THEN
    UPDATE "materials"
    SET "is_ai_generated" = true
    WHERE "id" IN (
      SELECT "result_material_id"
      FROM "external_material_import_jobs"
      WHERE "result_material_id" IS NOT NULL
    );
  END IF;
END
$$;