Enum ColumnWriter 

pub enum ColumnWriter<'a> {
    BoolColumnWriter(ColumnWriterImpl<'a, BoolType>),
    Int32ColumnWriter(ColumnWriterImpl<'a, Int32Type>),
    Int64ColumnWriter(ColumnWriterImpl<'a, Int64Type>),
    Int96ColumnWriter(ColumnWriterImpl<'a, Int96Type>),
    FloatColumnWriter(ColumnWriterImpl<'a, FloatType>),
    DoubleColumnWriter(ColumnWriterImpl<'a, DoubleType>),
    ByteArrayColumnWriter(ColumnWriterImpl<'a, ByteArrayType>),
    FixedLenByteArrayColumnWriter(ColumnWriterImpl<'a, FixedLenByteArrayType>),
}

Column writer for a Parquet type.

See get_column_writer to create instances of this type

Variants

BoolColumnWriter(ColumnWriterImpl<'a, BoolType>)

Column writer for boolean type

Int32ColumnWriter(ColumnWriterImpl<'a, Int32Type>)

Column writer for int32 type

Int64ColumnWriter(ColumnWriterImpl<'a, Int64Type>)

Column writer for int64 type

Int96ColumnWriter(ColumnWriterImpl<'a, Int96Type>)

Column writer for int96 (timestamp) type

FloatColumnWriter(ColumnWriterImpl<'a, FloatType>)

Column writer for float type

DoubleColumnWriter(ColumnWriterImpl<'a, DoubleType>)

Column writer for double type

ByteArrayColumnWriter(ColumnWriterImpl<'a, ByteArrayType>)

Column writer for byte array type

FixedLenByteArrayColumnWriter(ColumnWriterImpl<'a, FixedLenByteArrayType>)

Column writer for fixed length byte array type

Implementations

impl ColumnWriter<'_>

pub(crate) fn memory_size(&self) -> usize

Returns the estimated total memory usage

pub(crate) fn get_estimated_total_bytes(&self) -> u64

Returns the estimated total encoded bytes for this column writer

pub(crate) fn add_data_page(&mut self) -> Result<()>

Finalize the currently buffered values as a data page.

This is used by content-defined chunking to force a page boundary at content-determined positions.

pub(crate) fn set_distinct_count_override(&mut self, count: u64)

Sets a pre-computed distinct count on this column writer.

See GenericColumnWriter::set_distinct_count_override for details.

pub fn close(self) -> Result<ColumnCloseResult>

Close this ColumnWriter, returning the metadata for the column chunk.