Struct polars_io::partition::PartitionedWriter

pub struct PartitionedWriter<F> { /* private fields */ }

Available on crate feature partition only.

Write a DataFrame with disk partitioning

Example

use polars_core::prelude::*;
use polars_io::ipc::IpcWriterOption;
use polars_io::partition::PartitionedWriter;

fn example(df: &mut DataFrame) -> PolarsResult<()> {
    let option = IpcWriterOption::default();
    PartitionedWriter::new(option, "./rootdir", ["a", "b"])
        .finish(df)
}

Implementations

impl<F> PartitionedWriter<F>

where F: WriterFactory + Send + Sync,

pub fn new<P, I, S>(option: F, rootdir: P, by: I) -> Self

where P: Into<PathBuf>, I: IntoIterator<Item = S>, S: AsRef<str>,

pub fn with_parallel(self, parallel: bool) -> Self

Write the parquet file in parallel (default).

pub fn finish(self, df: &DataFrame) -> PolarsResult<()>