Struct ColumnCloseResult 

pub struct ColumnCloseResult {
    pub bytes_written: u64,
    pub rows_written: u64,
    pub metadata: ColumnChunkMetaData,
    pub bloom_filter: Option<Sbbf>,
    pub column_index: Option<ColumnIndexMetaData>,
    pub offset_index: Option<OffsetIndexMetaData>,
}

Metadata for a column chunk of a Parquet file.

Note this structure is returned by ColumnWriter::close.

Fields

bytes_written: u64

The total number of bytes written

rows_written: u64

The total number of rows written

metadata: ColumnChunkMetaData

Metadata for this column chunk

bloom_filter: Option<Sbbf>

Optional bloom filter for this column

column_index: Option<ColumnIndexMetaData>

Optional column index, for filtering

offset_index: Option<OffsetIndexMetaData>

Optional offset index, identifying page locations

Implementations

impl ColumnCloseResult

pub fn update_dictionary_location(self, dictionary_len: usize) -> Result<Self>

Rewrite the page offsets for a dictionary-first on-disk layout.

A writer that buffers the whole column chunk and splices it later (the Arrow path) may accept the data pages before the dictionary page so the data pages can stream straight through, then emit the dictionary page first at splice. The offsets recorded during encoding therefore assume a data-pages-first layout; call this with the serialized length of the dictionary page to move it to offset 0 and shift every data page after it. A dictionary_len of 0 (no dictionary page) leaves the result unchanged.

Trait Implementations

impl Clone for ColumnCloseResult

fn clone(&self) -> ColumnCloseResult

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ColumnCloseResult

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.