| .. 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 |
| .. specific language governing permissions and limitations |
| .. under the License. |
| |
| .. Borrowed the file from Apache Paimon: |
| .. https://github.com/apache/paimon/blob/master/docs/content/append-table/overview.md |
| |
| Append Only Table |
| ================= |
| If a table does not have a primary key defined, it is an append table. Compared |
| to the primary key table, it does not have the ability to directly receive changelogs. |
| It cannot be directly updated with data through upsert. It can only receive |
| incoming data from append data. |
