/**
 * Validate that a namespace is safe to use in queries
 * Allows alphanumeric, underscores, hyphens, and dots (for domain names)
 */
export declare function validateNamespace(namespace: string): boolean;
/**
 * Validate and return the namespace, throwing if invalid
 */
export declare function assertValidNamespace(namespace: string): string;
/**
 * Validate that a collection slug is safe to use in queries
 */
export declare function validateCollectionSlug(slug: string): boolean;
/**
 * Validate and return the collection slug, throwing if invalid
 */
export declare function assertValidSlug(slug: string, context: string): string;
/**
 * Sanitize a field path for use in JSON queries
 * Converts dot notation to ClickHouse JSON path syntax
 */
export declare function sanitizeFieldPath(path: string): string;
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