parquet::file::serialized_reader

Struct SerializedRowGroupReader

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pub struct SerializedRowGroupReader<'a, R: ChunkReader> {
    chunk_reader: Arc<R>,
    metadata: &'a RowGroupMetaData,
    offset_index: Option<&'a [OffsetIndexMetaData]>,
    props: ReaderPropertiesPtr,
    bloom_filters: Vec<Option<Sbbf>>,
}
Expand description

A serialized implementation for Parquet RowGroupReader.

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§chunk_reader: Arc<R>§metadata: &'a RowGroupMetaData§offset_index: Option<&'a [OffsetIndexMetaData]>§props: ReaderPropertiesPtr§bloom_filters: Vec<Option<Sbbf>>

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impl<'a, R: ChunkReader> SerializedRowGroupReader<'a, R>

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pub fn new( chunk_reader: Arc<R>, metadata: &'a RowGroupMetaData, offset_index: Option<&'a [OffsetIndexMetaData]>, props: ReaderPropertiesPtr, ) -> Result<Self>

Creates new row group reader from a file, row group metadata and custom config.

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impl<R: 'static + ChunkReader> RowGroupReader for SerializedRowGroupReader<'_, R>

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fn get_column_bloom_filter(&self, i: usize) -> Option<&Sbbf>

get bloom filter for the ith column

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fn metadata(&self) -> &RowGroupMetaData

Get metadata information about this row group.
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fn num_columns(&self) -> usize

Get the total number of column chunks in this row group.
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fn get_column_page_reader(&self, i: usize) -> Result<Box<dyn PageReader>>

Get page reader for the ith column chunk.
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fn get_row_iter(&self, projection: Option<SchemaType>) -> Result<RowIter<'_>>

Get an iterator over the row in this file, see RowIter for caveats. Read more
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fn get_column_reader(&self, i: usize) -> Result<ColumnReader>

Get value reader for the ith column chunk.

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impl<'a, R> Freeze for SerializedRowGroupReader<'a, R>

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impl<'a, R> RefUnwindSafe for SerializedRowGroupReader<'a, R>
where R: RefUnwindSafe,

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impl<'a, R> Send for SerializedRowGroupReader<'a, R>

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impl<'a, R> Sync for SerializedRowGroupReader<'a, R>

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impl<'a, R> Unpin for SerializedRowGroupReader<'a, R>

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impl<'a, R> UnwindSafe for SerializedRowGroupReader<'a, R>
where R: RefUnwindSafe,

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

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fn type_id(&self) -> TypeId

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impl<T> Borrow<T> for T
where T: ?Sized,

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T, U> TryFrom<U> for T
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type Error = Infallible

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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

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impl<T> ErasedDestructor for T
where T: 'static,

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impl<T> MaybeSendSync for T