/**
 * ToonDB Query Builder
 *
 * Fluent query interface for ToonDB.
 *
 * @packageDocumentation
 */
import { IpcClient } from './ipc-client';
/**
 * Query result row.
 */
export interface QueryResult {
    [key: string]: unknown;
}
/**
 * Fluent query builder for ToonDB.
 *
 * @example
 * ```typescript
 * const results = await db.query('users/')
 *   .limit(10)
 *   .select(['name', 'email'])
 *   .toList();
 * ```
 */
export declare class Query {
    private _client;
    private _pathPrefix;
    private _limit?;
    private _offset?;
    private _columns?;
    constructor(client: IpcClient, pathPrefix: string);
    /**
     * Limit the number of results.
     *
     * @param n - Maximum number of results to return
     * @returns This query builder for chaining
     */
    limit(n: number): Query;
    /**
     * Skip the first n results.
     *
     * @param n - Number of results to skip
     * @returns This query builder for chaining
     */
    offset(n: number): Query;
    /**
     * Select specific columns to return.
     *
     * @param columns - Array of column names to select
     * @returns This query builder for chaining
     */
    select(columns: string[]): Query;
    /**
     * Execute the query and return results as TOON string.
     *
     * @returns TOON formatted string (e.g., "result[N]{cols}: row1; row2")
     */
    execute(): Promise<string>;
    /**
     * Execute and parse results into a list of objects.
     *
     * @returns Array of result objects
     */
    toList(): Promise<QueryResult[]>;
    /**
     * Execute and return the first result, or null if none.
     *
     * @returns First result or null
     */
    first(): Promise<QueryResult | null>;
    /**
     * Execute and return the count of results.
     *
     * @returns Number of matching results
     */
    count(): Promise<number>;
    /**
     * Simple TOON parser.
     *
     * Parses TOON format: "result[N]{col1,col2}: val1,val2; val3,val4"
     */
    private _parseToon;
}
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