ashvina commented on code in PR #634: URL: https://github.com/apache/incubator-xtable/pull/634#discussion_r1944174106
########## rfc/rfc-2/2 - Deletion Info Conversion.md: ########## @@ -0,0 +1,159 @@ +<!-- + 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. +--> +# RFC-2: Support for conversion of Deletion Vectors from Delta Lake to Iceberg format + +## Proposers** + +- @ashvin + +## Status + +GH Feature Request: https://github.com/apache/incubator-xtable/issues/339 + +## Abstract +Deletion vectors are one of the most popular features in table formats, allowing logical deletion of records, by marking +them as deleted, without requiring rewriting of the data files to remove them physically. This document provides a +high-level proposal of deletion vector conversion in XTable, focusing on the current implementation of deletion vectors +in Delta Lake and Iceberg. + +## Background +Deletion vectors feature in table formats like **_Delta Lake_** and **_Apache Iceberg_** are designed to enhance data +management efficiency. These vectors allow for the marking of deleted rows without physically removing them from the +data files, thereby optimizing operations such as `DELETE`, `UPDATE`, and `MERGE`. By maintaining a separate files of Review Comment: Yes, existing deletion vectors are never updated after commit. Each DML should create a new delete vector. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
