Add support for configuring avro writer compression for Manifests and Manifest Lists using table properties #14454
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October 31, 2025 15:50
The iceberg table properties are never actually propagated to Avro writers in Iceberg. As a result of this, the configuration for Avro compression can never actually be altered, and all avro files are compressed with gzip. In this change, let's fix support adding table properties to ManifestList avro files.
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Description:
This PR adds support for configuring avro compression for Manifests and ManifestLists using table properties.
Problem:
Despite configuration options existing for write.avro.compression-codec and write.avro.compression-level, overriding these at the table properties level does not actually change the compression level for writers. Many of the code-paths to the manifest writers are hard-coded to use GZIP only.
Solution:
Ensure we are wiring through table properties to the ManifestLists writer and Manifests writer
Testing
Added unit tests: