/**
*  @license
* Copyright 2022 JsData. All rights reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.

* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* ==========================================================================
*/
import DataFrame from "../core/frame";
declare type mergeParam = {
    left: DataFrame;
    right: DataFrame;
    on: Array<string>;
    how: "outer" | "inner" | "left" | "right";
};
/**
 * Perform merge operation between two DataFrame
 * @param params : {
 * left: DataFrame
 * right: DataFrame
 * on: Array<string>
 * how: "outer" | "inner" | "left" | "right"
 * }
 */
export default function merge(params: mergeParam): DataFrame;
export {};