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BatchedWriter

polars_io::ipc

Struct BatchedWriter 

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pub struct BatchedWriter<W: Write> { /* private fields */ }
Available on crate features ipc_streaming or ipc only.

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impl<W: Write> BatchedWriter<W>

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

Write a batch to the ipc writer.

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The caller must ensure the chunks in the given DataFrame are aligned.

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pub fn write_encoded( &mut self, dictionaries: &[EncodedData], message: &EncodedData, ) -> PolarsResult<()>

Write a encoded data to the ipc writer.

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The caller must ensure the chunks in the given DataFrame are aligned.

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pub fn write_encoded_dictionaries( &mut self, encoded_dictionaries: &[EncodedData], ) -> PolarsResult<()>

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pub fn set_custom_metadata(&mut self, custom_metadata: Vec<(String, String)>)

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pub fn finish(&mut self) -> PolarsResult<()>

Writes the footer of the IPC file.

Auto Trait Implementations§

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impl<W> !RefUnwindSafe for BatchedWriter<W>

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impl<W> !UnwindSafe for BatchedWriter<W>

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impl<W> Freeze for BatchedWriter<W>
where FileWriter<W>: Freeze,

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impl<W> Send for BatchedWriter<W>
where FileWriter<W>: Send,

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impl<W> Sync for BatchedWriter<W>
where FileWriter<W>: Sync,

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impl<W> Unpin for BatchedWriter<W>
where FileWriter<W>: Unpin,

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impl<W> UnsafeUnpin for BatchedWriter<W>
where FileWriter<W>: UnsafeUnpin,

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impl<T> Any for T
where T: 'static + ?Sized,

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