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

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

Available on crate feature io_parquet only.

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 write(&mut self, row_group: RowGroupIter<'_, Error>) -> Result<()>

Writes a row group to the file.

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

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

pub fn into_inner(self) -> W

Consumes this writer and returns the inner writer

pub fn into_inner_and_metadata(self) -> (W, ThriftFileMetaData)

Returns the underlying writer and ThriftFileMetaData

Panics

This function panics if Self::end has not yet been called