paimon-python/pypaimon/execution/python/write/writer/mosaic_writer_options.py

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from pypaimon.common.options.core_options import CoreOptions


def create_mosaic_writer_options(options: CoreOptions):
    import mosaic

    compression = options.file_compression()
    if compression is not None and compression.lower() != "zstd":
        raise ValueError(f"Mosaic format only supports zstd compression, but got: {compression}")

    kwargs = {
        "zstd_level": options.file_compression_zstd_level(),
    }

    num_buckets = options.mosaic_num_buckets()
    if num_buckets is not None:
        kwargs["num_buckets"] = num_buckets

    block_size = options.file_block_size()
    if block_size is not None:
        kwargs["row_group_max_size"] = block_size.get_bytes()

    stats_columns = options.mosaic_stats_columns()
    if stats_columns:
        kwargs["stats_columns"] = stats_columns

    return mosaic.WriterOptions(**kwargs)