1.39.0(2022-08-23) Features • bigquery/storage: allow users to set Apache Avro output format options through avro_serialization_options param in TableReadOptions message Through AvroSerializationOptions, users can set enable_display_name_attribute, which populates displayName for every avro field with the original column name Improved documentation for selected_fields, added example for clarity. (41ab4ec) • bigquery: add PreserveAsciiControlCharacters support for CSV (#6448) (b7bac2f) • bigquery: add preview support for default values (#6464) (edc3be5)