/**
 * postgres-mcp — Query Validation
 *
 * SQL query safety checks extracted from `DatabaseAdapter` to keep
 * that base class under the 500-line target.
 *
 * Used exclusively by `DatabaseAdapter.validateQuery()`.
 */
/**
 * Validate a SQL query string for safety.
 *
 * Checks for multi-statement injection patterns and, when `isReadOnly`
 * is `true`, rejects queries that start with write keywords.
 *
 * Parameterized queries provide the primary defense against data-level
 * injection — this function guards against structural/statement attacks.
 *
 * @param sql       SQL query to validate
 * @param isReadOnly Whether to enforce read-only restrictions
 * @throws {ValidationError} on dangerous or disallowed patterns
 */
export declare function validateQuery(sql: string, isReadOnly: boolean): void;
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