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feat(iceberg): support metadata tables #19873

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@xxchan xxchan commented Dec 20, 2024

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Release note

Ok(Box::new(IcebergMetadataScanExecutor {
iceberg_properties,
identity: source.plan_node().get_identity().clone(),
schema: Schema::new(vec![]),
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The schema should be initialized using iceberg_metadata_table_schema(node.table_type) rather than Schema::new(vec![]) to properly reflect the metadata table's structure. The current empty schema means no columns would be available, which is incorrect.

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