/**
 * SQL Mode 2 — Raw Passthrough
 *
 * When connected to a SQL backend and { raw: true } is passed,
 * the SQL string bypasses Mode 2 and goes directly to the native driver.
 */
import type { Backend } from '../types.js';
/**
 * Validate raw mode. Throws if the combination is invalid.
 */
export declare function validateSqlMode(backend: Backend, raw: boolean | undefined, sql: string): 'mode2' | 'raw';
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