| /******************************************************************************** |
| * Copyright (c) 2015-2019 Contributors to the Eclipse Foundation |
| * |
| * See the NOTICE file(s) distributed with this work for additional |
| * information regarding copyright ownership. |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| ********************************************************************************/ |
| |
| package org.eclipse.mdm.api.base.query; |
| |
| /** |
| * Aggregation enumeration. |
| * |
| * @since 1.0.0 |
| * @author Viktor Stoehr, Gigatronik Ingolstadt GmbH |
| * @author Sebastian Dirsch, Gigatronik Ingolstadt GmbH |
| * @see Query |
| */ |
| public enum Aggregation { |
| |
| // ====================================================================== |
| // Enumerations |
| // ====================================================================== |
| |
| /** |
| * No aggregate function is used for the selected attribute. |
| */ |
| NONE, |
| |
| /** |
| * Used to count the number of result rows. |
| */ |
| COUNT, |
| |
| /** |
| * Within the result rows for the selected attribute all distinct values are |
| * counted. |
| */ |
| DISTINCT_COUNT, |
| |
| /** |
| * Within the result rows for the selected attribute the smallest value is |
| * selected. Only for numerical values. |
| */ |
| MINIMUM, |
| |
| /** |
| * Within the result rows for the selected attribute the highest value is |
| * selected. Only for numerical values. |
| */ |
| MAXIMUM, |
| |
| /** |
| * Over all result rows for the selected attribute the average value is |
| * calculated. Only for numerical values. |
| */ |
| AVERAGE, |
| |
| /** |
| * Over all result rows for the selected attribute the standard deviation value |
| * is calculated. Only for numerical values. |
| */ |
| DEVIATION, |
| |
| /** |
| * All result rows for the selected attribute are summed. Only for numerical |
| * values. |
| */ |
| SUM, |
| |
| /** |
| * Within the result rows for the selected attribute all distinct values are |
| * collected. |
| */ |
| DISTINCT |
| |
| } |