iceberg_metadata_* session settings

These settings are available in system.settings and are autogenerated from the ClickHouse snapshot.

iceberg_metadata_compression_method

Method to compress .metadata.json file.

iceberg_metadata_log_level

Controls the level of metadata logging for Iceberg tables to system.iceberg_metadata_log. Usually this setting can be modified for debugging purposes.

Possible values:

• none - No metadata log.
• metadata - Root metadata.json file.
• manifest_list_metadata - Everything above + metadata from avro manifest list which corresponds to a snapshot.
• manifest_list_entry - Everything above + avro manifest list entries.
• manifest_file_metadata - Everything above + metadata from traversed avro manifest files.
• manifest_file_entry - Everything above + traversed avro manifest files entries.

iceberg_metadata_staleness_ms

If non-zero, skip fetching iceberg metadata from remote catalog if there is a cached metadata snapshot, more recent than the given staleness window. Zero means to always fetch the latest metadata version from the remote catalog. Setting this a non-zero trades staleness to a lower latency of read operations.