parquet::data_type

Trait DataType

Source 
pub trait DataType: 'static + Send {
    type T: ParquetValueType;

    // Required methods
    fn get_type_size() -> usize;
    fn get_column_reader(
        column_writer: ColumnReader,
    ) -> Option<ColumnReaderImpl<Self>>
       where Self: Sized;
    fn get_column_writer(
        column_writer: ColumnWriter<'_>,
    ) -> Option<ColumnWriterImpl<'_, Self>>
       where Self: Sized;
    fn get_column_writer_ref<'a, 'b: 'a>(
        column_writer: &'b ColumnWriter<'a>,
    ) -> Option<&'b ColumnWriterImpl<'a, Self>>
       where Self: Sized;
    fn get_column_writer_mut<'a, 'b: 'a>(
        column_writer: &'a mut ColumnWriter<'b>,
    ) -> Option<&'a mut ColumnWriterImpl<'b, Self>>
       where Self: Sized;

    // Provided method
    fn get_physical_type() -> Type { ... }
}
Expand description

Contains the Parquet physical type information as well as the Rust primitive type presentation.

Required Associated Types§

Source

type T: ParquetValueType

The physical type of the Parquet data type.

Required Methods§

Source

fn get_type_size() -> usize

Returns size in bytes for Rust representation of the physical type.

Source

fn get_column_reader( column_writer: ColumnReader, ) -> Option<ColumnReaderImpl<Self>>
where Self: Sized,

Returns the underlying ColumnReaderImpl for the given ColumnReader.

Source

fn get_column_writer( column_writer: ColumnWriter<'_>, ) -> Option<ColumnWriterImpl<'_, Self>>
where Self: Sized,

Returns the underlying ColumnWriterImpl for the given ColumnWriter.

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fn get_column_writer_ref<'a, 'b: 'a>( column_writer: &'b ColumnWriter<'a>, ) -> Option<&'b ColumnWriterImpl<'a, Self>>
where Self: Sized,

Returns a reference to the underlying ColumnWriterImpl for the given ColumnWriter.

Source

fn get_column_writer_mut<'a, 'b: 'a>( column_writer: &'a mut ColumnWriter<'b>, ) -> Option<&'a mut ColumnWriterImpl<'b, Self>>
where Self: Sized,

Returns a mutable reference to the underlying ColumnWriterImpl for the given

Provided Methods§

Source

fn get_physical_type() -> Type

Returns Parquet physical type.

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§