/**
 * Shared validation utilities for semantic layer queries.
 */
import type { FieldType, MetricFilter } from './types.js';
/**
 * Result of a validation operation.
 */
export interface ValidationResult {
    valid: boolean;
    errors: string[];
}
/**
 * Checks if a value matches the expected field type.
 *
 * @param fieldType - The expected field type
 * @param value - The value to check
 * @returns true if the value matches the field type
 */
export declare function matchesFieldType(fieldType: FieldType, value: unknown): boolean;
/**
 * Validates a filter value against the expected field type.
 *
 * @param filter - The filter to validate
 * @param fieldType - The expected field type
 * @returns null if valid, error message if invalid
 */
export declare function validateFilterValue(filter: MetricFilter, fieldType: FieldType): string | null;
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