/**
 * True when the driver honoured RETURNING and gave back an actual row.
 */
export declare function isRow<T extends object>(value: unknown): value is T;
/**
 * The id of a freshly inserted row, or undefined if the driver reported none.
 */
export declare function insertedId(result: unknown): number | undefined;
/**
 * The row a write actually produced.
 *
 * Returns the driver's RETURNING row when there is one, otherwise re-selects
 * the row by the id it reported.
 */
export declare function resolveWrittenRow<T extends object>(db: {
    selectFrom: (table: string) => {
      where: (column: string, op: string, value: unknown) => {
        selectAll: () => { executeTakeFirst: () => Promise<unknown> }
      }
    }
  }, table: string, result: unknown): Promise<T | undefined>;
/**
 * The number of rows affected by a delete/update.
 *
 * The count arrives as a bare number on some drivers and nested under
 * `{ changes }` on SQLite.
 */
export declare function affectedRows(result: unknown, key: 'numDeletedRows' | 'numUpdatedRows'): number;