parquet::column::writer

Type Alias ColumnWriterImpl

Source
pub type ColumnWriterImpl<'a, T> = GenericColumnWriter<'a, ColumnValueEncoderImpl<T>>;
Expand description

Typed column writer for a primitive column.

Aliased Type§

struct ColumnWriterImpl<'a, T> {
Show 18 fields descr: Arc<ColumnDescriptor>, props: Arc<WriterProperties>, statistics_enabled: EnabledStatistics, page_writer: Box<dyn PageWriter + 'a>, codec: Compression, compressor: Option<Box<dyn Codec>>, encoder: ColumnValueEncoderImpl<T>, page_metrics: PageMetrics, column_metrics: ColumnMetrics<<ColumnValueEncoderImpl<T> as ColumnValueEncoder>::T>, encodings: BTreeSet<Encoding>, def_levels_sink: Vec<i16>, rep_levels_sink: Vec<i16>, data_pages: VecDeque<CompressedPage>, column_index_builder: ColumnIndexBuilder, offset_index_builder: OffsetIndexBuilder, data_page_boundary_ascending: bool, data_page_boundary_descending: bool, last_non_null_data_page_min_max: Option<(<ColumnValueEncoderImpl<T> as ColumnValueEncoder>::T, <ColumnValueEncoderImpl<T> as ColumnValueEncoder>::T)>,
}

Fields§

§descr: Arc<ColumnDescriptor>§props: Arc<WriterProperties>§statistics_enabled: EnabledStatistics§page_writer: Box<dyn PageWriter + 'a>§codec: Compression§compressor: Option<Box<dyn Codec>>§encoder: ColumnValueEncoderImpl<T>§page_metrics: PageMetrics§column_metrics: ColumnMetrics<<ColumnValueEncoderImpl<T> as ColumnValueEncoder>::T>§encodings: BTreeSet<Encoding>

The order of encodings within the generated metadata does not impact its meaning, but we use a BTreeSet so that the output is deterministic

§def_levels_sink: Vec<i16>§rep_levels_sink: Vec<i16>§data_pages: VecDeque<CompressedPage>§column_index_builder: ColumnIndexBuilder§offset_index_builder: OffsetIndexBuilder§data_page_boundary_ascending: bool§data_page_boundary_descending: bool§last_non_null_data_page_min_max: Option<(<ColumnValueEncoderImpl<T> as ColumnValueEncoder>::T, <ColumnValueEncoderImpl<T> as ColumnValueEncoder>::T)>

(min, max)