| //// |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| http://www.apache.org/licenses/LICENSE-2.0 |
| 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 |
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| //// |
| :documentationPath: /plugins/transforms/ |
| :language: en_US |
| :page-alternativeEditUrl: https://github.com/apache/incubator-hop/edit/master/plugins/transforms/closure/src/main/doc/closure.adoc |
| = Closure |
| |
| == Description |
| |
| This transform was created to allow you to generate a Reflexive Transitive Closure Table for Mondrian. For more information on how a closure table can help Mondrian gain performance, go here |
| Technically, this transform reads all input rows in memory and calculates all possible parent-child relationships. It attaches the distance (in levels) from parent to child. |
| |
| == Options |
| |
| [width="90%", options="header"] |
| |=== |
| |Option|Description |
| |Transform name|The name that uniquely identifies the transform. |
| |Parent ID field|The field name that contains the parent ID of the parent-child relationship. |
| |Child ID field|The field name that contains the child ID of the parent-child relationship. |
| |Distance field name|The name of the distance field that will be added to the output |
| |Root is zero|Check this box if the root of the parent-child tree is not empty (null) but zero (0) |
| |=== |
