xanderbailey commented on code in PR #2249:
URL: https://github.com/apache/iceberg-rust/pull/2249#discussion_r3059460822
##########
crates/iceberg/src/writer/file_writer/parquet_writer.rs:
##########
@@ -67,12 +70,33 @@ impl ParquetWriterBuilder {
schema: SchemaRef,
match_mode: FieldMatchMode,
) -> Self {
+ let props = Self::add_iceberg_schema_metadata(props, &schema);
Self {
props,
schema,
match_mode,
}
}
+
+ /// Adds the `iceberg.schema` key-value metadata to the Parquet writer
properties.
+ ///
+ /// This embeds the full Iceberg schema JSON (including field IDs, types,
and
+ /// schema ID) into the Parquet file footer.
+ fn add_iceberg_schema_metadata(props: WriterProperties, schema: &Schema)
-> WriterProperties {
+ let schema_json = serde_json::to_string(schema)
+ .expect("Iceberg schema serialization to JSON should not fail");
Review Comment:
Can we propagate this error up rather than having it panic?
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