/**
 * SQL escaping utilities to prevent SQL injection attacks
 */
/**
 * Escape a SQL identifier (table name, column name, schema name)
 * DuckDB uses double quotes for identifiers
 */
export declare function escapeIdentifier(identifier: string): string;
/**
 * Escape a SQL string value
 * DuckDB uses single quotes for strings
 */
export declare function escapeString(value: string): string;
/**
 * Escape a file path for use in DuckDB file functions
 * File paths need special handling to prevent directory traversal
 */
export declare function escapeFilePath(path: string): string;
/**
 * Build a safe qualified table name (schema.table)
 */
export declare function buildQualifiedName(schema: string, table: string): string;
/**
 * Validate and escape a limit value
 */
export declare function escapeLimit(limit: number | string): number;
/**
 * Create a parameterized query placeholder
 * Note: DuckDB Node.js API may not support prepared statements yet,
 * so this is for future use
 */
export declare function createPlaceholder(index: number): string;
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