Module read

Available on crate feature parquet only.

Functionality for reading Apache Parquet files.

Examples

use polars_core::prelude::*;
use polars_io::prelude::*;
use std::fs::File;

fn example() -> PolarsResult<DataFrame> {
    let r = File::open("example.parquet").unwrap();
    let reader = ParquetReader::new(r);
    reader.finish()
}

Modules

• _internal

Structs

• BatchedParquetReader
• FileMetadata
  Metadata for a Parquet file.
• ParquetAsyncReadercloud
  A Parquet reader on top of the async object_store API. Only the batch reader is implemented since parquet files on cloud storage tend to be big and slow to access.
• ParquetOptions
• ParquetReader
  Read Apache parquet format into a DataFrame.

Enums

• ParallelStrategy

Functions

• create_sorting_map
• infer_schema
  Infers a [ArrowSchema] from parquet’s FileMetadata.
• materialize_empty_df
• try_set_sorted_flag