Function combine_data_files

pub fn combine_data_files(
    parquet_files: Vec<PathBuf>,
    column_name: &str,
    compression: Option<Compression>,
    max_row_group_size: Option<usize>,
) -> Result<()>

Combines multiple Parquet files by column range checks and ordering, then writes the merged result.

Errors

Returns an error if file reading fails, metadata extraction fails, or merging safety checks fail.