apache / apache/iceberg

File Format API

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not-stale proposal
Dominant language
Java
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Description

### Proposed Change

Iceberg currently supports 3 different file formats: Avro, Parquet, ORC. With the introduction of Iceberg V3 specification many new features are added to Iceberg. Some of these features like new column types, default values require changes at the file format level. The changes are added by individual developers with different focus on the different file formats. As a result not all of the features are available for every supported file format.
Also there are emerging file formats like Vortex [1] or Lance [2] which either by specialization, or by applying newer research results could provide better alternatives for certain use-cases like random access for data, or storing ML models.

### Proposal document

https://docs.google.com/document/d/1sF_d4tFxJsZWsZFCyCL9ZE7YuI7-P3VrzMLIrrTIxds

### Specifications

- [ ] Table
- [ ] View
- [ ] REST
- [ ] Puffin
- [ ] Encryption
- [ ] Other

Contributor guide

Open the contributing guide

Research direction

Start by reading the linked proposal document, then compare its scope with the issue's checklist for Table, View, REST, Puffin, Encryption, and Other. Done means the File Format API scope and its coverage across these specification areas are defined and agreed.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
data-engineering
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
25/100

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