Struct arrow2::io::parquet::write::FileWriter

pub struct FileWriter<W: Write> { /* private fields */ }

An interface to write a parquet to a Write

Implementations

impl<W: Write> FileWriter<W>

pub fn options(&self) -> &WriteOptions

The options assigned to the file

pub fn parquet_schema(&self) -> &SchemaDescriptor

The SchemaDescriptor assigned to this file

pub fn schema(&self) -> &Schema

The Schema assigned to this file

impl<W: Write> FileWriter<W>

pub fn try_new(writer: W, schema: Schema, options: WriteOptions) -> Result<Self>

Returns a new FileWriter.

Error

If it is unable to derive a parquet schema from Schema.

pub fn start(&mut self) -> Result<()>

Writes the header of the file

pub fn write(
    &mut self,
    row_group: RowGroupIter<'_, ArrowError>,
    num_rows: usize
) -> Result<()>

Writes a row group to the file.

pub fn end(self, key_value_metadata: Option<Vec<KeyValue>>) -> Result<(u64, W)>

Writes the footer of the parquet file. Returns the total size of the file.