polars_io::prelude

Trait SerReader

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pub trait SerReader<R>
where R: Read,
{ // Required methods fn new(reader: R) -> Self; fn finish(self) -> PolarsResult<DataFrame>; // Provided method fn set_rechunk(self, _rechunk: bool) -> Self where Self: Sized { ... } }

Required Methods§

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fn new(reader: R) -> Self

Create a new instance of the SerReader

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fn finish(self) -> PolarsResult<DataFrame>

Take the SerReader and return a parsed DataFrame.

Provided Methods§

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fn set_rechunk(self, _rechunk: bool) -> Self
where Self: Sized,

Make sure that all columns are contiguous in memory by aggregating the chunks into a single array.

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§

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impl<R> SerReader<R> for AvroReader<R>
where R: Read + Seek,

Available on crate feature avro only.
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impl<R> SerReader<R> for CsvReader<R>
where R: MmapBytesReader,

Available on crate features csv or json only.
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impl<R> SerReader<R> for IpcStreamReader<R>
where R: Read,

Available on crate feature ipc_streaming and (crate features ipc or ipc_streaming) only.
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impl<R> SerReader<R> for JsonReader<'_, R>
where R: MmapBytesReader,

Available on crate feature json only.
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impl<R> SerReader<R> for JsonLineReader<'_, R>
where R: MmapBytesReader,

Available on crate feature json only.
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impl<R: MmapBytesReader> SerReader<R> for IpcReader<R>

Available on crate feature ipc and (crate features ipc or ipc_streaming) only.
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impl<R: MmapBytesReader> SerReader<R> for ParquetReader<R>

Available on crate feature parquet only.