/**
 * Switch for row uids (T12341). ON by default since T13305 (C2): the
 * real-store Gate B of the release recipe passed on every store (spec
 * `t12341-uid-scheme` §15.0). `CLEO_ROW_UID_FILL=0` is the kill switch: with it,
 * the open pass does not run, no per-connection trigger is installed, and new
 * rows get no uid. Kept tiny so the Drizzle schema can use
 * {@link defaultRowUid}.
 *
 * @module
 * @task T12341
 * @task T13305
 */
import { type SQL } from 'drizzle-orm';
/** Environment variable whose value `0` turns row uids OFF (the kill switch; T13305). */
export declare const ROW_UID_FILL_FLAG = "CLEO_ROW_UID_FILL";
/**
 * Whether row uids are enabled for this process.
 *
 * @returns `false` only when {@link ROW_UID_FILL_FLAG} is `0` (on by default).
 */
export declare function rowUidFillEnabled(): boolean;
/**
 * Drizzle `$defaultFn` for a minted table's uid: a random UUIDv7 when row
 * uids are enabled, else SQL NULL (the open pass fills it once they are).
 *
 * @returns A uid, or `NULL`.
 */
export declare function defaultRowUid(): string | SQL;
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