/**
 * Cross-dialect insert with returning.
 * PostgreSQL and SQLite support .returning(), MySQL does not.
 * All dialects generate UUID client-side for predictability.
 */
export declare function insertReturning<T>(db: any, table: any, values: Record<string, unknown>): Promise<T>;
/**
 * Cross-dialect update with returning.
 */
export declare function updateReturning<T>(db: any, table: any, where: any, values: Record<string, unknown>): Promise<T | null>;
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