/**
 * Operator-declared SQL gate. The dialect is never inferred from the statement.
 * Guessing from attacker-controlled SQL would pick the parser for them.
 */
import type { GuardedQuery } from '../governance.js';
import type { GovernancePolicy } from '../types.js';
import type { SqlDialectId } from './types.js';
export declare const SQL_DIALECTS: readonly ['postgres', 'mssql', 'oracle'];
export type SqlDialect = SqlDialectId;
type DialectGate = (sql: string, policy: GovernancePolicy) => GuardedQuery;
export declare function registerSqlGate(dialect: Exclude<SqlDialect, 'postgres'>, gate: DialectGate): void;
/** Missing → postgres. Anything else (typo, case, mysql) throws. No silent fallback. */
export declare function resolveSqlDialect(value: unknown): SqlDialect;
export declare function loadSqlGate(dialect: SqlDialect): Promise<void>;
export declare function guardSqlByDialect(dialect: SqlDialect, sql: string, policy: GovernancePolicy, postgresGuard: (sql: string) => GuardedQuery): GuardedQuery;
export {};
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