/**
 * SQL Query Validator - Prevents SQL Injection
 *
 * Validates SQL queries to prevent common SQL injection attacks
 */
export interface QueryValidationOptions {
    allowDynamicQueries?: boolean;
    maxQueryLength?: number;
    forbiddenPatterns?: RegExp[];
    logViolations?: boolean;
}
export declare class SQLQueryValidator {
    private options;
    private violations;
    constructor(options?: QueryValidationOptions);
    /**
     * Validate a SQL query
     */
    validate(query: string, context?: {
        clientIP?: string;
        userId?: string;
    }): void;
    /**
     * Validate and sanitize query parameters
     */
    validateParams(params: any[]): any[];
    /**
     * Create a safe parameterized query
     */
    createSafeQuery(template: string, params: any[]): {
        query: string;
        params: any[];
    };
    /**
     * Log security violation
     */
    private logViolation;
    /**
     * Get violation log
     */
    getViolations(): typeof this.violations;
    /**
     * Clear violation log
     */
    clearViolations(): void;
}
/**
 * Get or create global SQL validator
 */
export declare function getSQLValidator(): SQLQueryValidator;
/**
 * Validate SQL query (convenience function)
 */
export declare function validateSQL(query: string, params?: any[]): void;
/**
 * Create safe SQL query (convenience function)
 */
export declare function sql(template: string, params: any[]): {
    query: string;
    params: any[];
};
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