import http from 'http';
import { Cursor } from './Cursor.js';
import { CrateDBConfig, CrateDBBaseResponse, CrateDBResponse, CrateDBBulkResponse, CrateDBRecord, OptimizeOptions, ColumnDefinition, TableOptions, QueryConfig } from './interfaces';
export declare class CrateDBClient {
    private cfg;
    private httpAgent;
    private protocol;
    private httpOptions;
    constructor(config?: {});
    createCursor(sql: string): Cursor;
    streamQuery(sql: string, batchSize?: number): AsyncGenerator<CrateDBRecord, void, unknown>;
    execute(stmt: string, args?: unknown[], config?: QueryConfig): Promise<CrateDBResponse>;
    executeMany(stmt: string, bulk_args: unknown[][]): Promise<CrateDBBulkResponse>;
    /**
     * Inserts a single row into a specified table with optional primary key conflict resolution.
     *
     * If primaryKeys are provided, conflicts will be handled by updating the non-primary key
     * fields of the conflicting row. If no primaryKeys are provided, conflicting rows will be skipped.
     *
     * @param {string} tableName - The name of the table to insert the row into.
     * @param {Record<string, unknown>} obj - An object representing the row to insert.
     * @param {string[] | null} [primaryKeys=null] - Array of column names to use as primary keys for conflict resolution.
     * @returns {Promise<CrateDBResponse>} A promise resolving to the response from CrateDB.
     * @throws {Error} If the input parameters are invalid.
     */
    insert(tableName: string, obj: Record<string, unknown>, primaryKeys?: string[] | null): Promise<CrateDBResponse>;
    /**
     * Inserts multiple rows into a table with optional primary key conflict resolution.
     *
     * If primaryKeys are provided, conflicts will be handled by updating the non-primary key
     * fields of conflicting rows. If no primaryKeys are provided, conflicting rows will be skipped.
     * The method automatically handles varying column sets across the input objects.
     *
     * @param {string} tableName - The name of the table to insert rows into.
     * @param {Record<string, unknown>[]} objectArray - Array of objects representing rows to insert.
     * @param {string[] | null} [primaryKeys=null] - Array of column names to use as primary keys for conflict resolution.
     * @returns {Promise<CrateDBBulkResponse>} A promise resolving to the bulk operation response from CrateDB.
     * @throws {Error} If the input parameters are invalid or if the operation fails.
     */
    insertMany(tableName: string, objectArray: Record<string, unknown>[], primaryKeys?: string[] | null): Promise<CrateDBBulkResponse>;
    /**
     * Drops a table if it exists in CrateDB.
     *
     * Constructs and executes a `DROP TABLE IF EXISTS` SQL statement.
     *
     * @param {string} tableName - The name of the table to drop.
     * @returns {Promise<CrateDBResponse>} A promise resolving to the response from CrateDB.
     */
    drop(tableName: string): Promise<CrateDBResponse>;
    createTable(tableName: string, schema: Record<string, ColumnDefinition>, options?: TableOptions): Promise<CrateDBResponse>;
    /**
     * Refreshes a given table by refreshing it in CrateDB.
     *
     * The `REFRESH TABLE` command makes recently committed changes available for querying
     * without waiting for automatic refresh intervals.
     *
     * @param {string} tableName - The name of the table to refresh.
     * @returns {Promise<CrateDBResponse>} A promise resolving to the response from CrateDB.
     */
    refresh(tableName: string): Promise<CrateDBResponse>;
    /**
     * Optimizes a given table or specific partitions in CrateDB by merging table segments.
     *
     * The `OPTIMIZE TABLE` command reduces the number of segments in a table, improving
     * query performance and reducing storage overhead. It supports optimizing the entire table
     * or specific partitions and allows additional optimization parameters.
     *
     * @param {string} tableName - The name of the table to optimize.
     * @param {OptimizeOptions} [options] - Optional parameters for table optimization.
     * @param {Record<string, string | number>} [partitions] - Optional key-value pairs specifying partition columns and values.
     * @returns {Promise<CrateDBResponse>} A promise resolving to the response from CrateDB.
     */
    optimize(tableName: string, options?: OptimizeOptions, partitions?: Record<string, string | number>): Promise<CrateDBResponse>;
    /**
     * Retrieves the primary key columns for a given table.
     *
     * Queries the information_schema to get the primary key columns
     * of the specified table in their defined order.
     *
     * @param {string} tableName - The name of the table to get primary keys for.
     * @returns {Promise<string[]>} A promise resolving to an array of primary key column names.
     * @throws {Error} If the table doesn't exist or if there's an error retrieving the information.
     */
    getPrimaryKeys(tableName: string): Promise<string[]>;
    private _addDurations;
    _makeRequest(options: http.RequestOptions & {
        body?: string | Buffer;
    }): Promise<CrateDBBaseResponse>;
    protected _transformResponse(response: CrateDBBaseResponse, rowMode?: 'array' | 'object'): CrateDBBaseResponse;
    getConfig(): Readonly<CrateDBConfig>;
    getHttpOptions(): Readonly<http.RequestOptions>;
}