Struct Writer 

pub struct Writer<W: Write> {
    writer: Writer<W>,
    has_headers: bool,
    date_format: Option<String>,
    datetime_format: Option<String>,
    timestamp_format: Option<String>,
    timestamp_tz_format: Option<String>,
    time_format: Option<String>,
    beginning: bool,
    null_value: Option<String>,
    ignore_leading_whitespace: bool,
    ignore_trailing_whitespace: bool,
}

A CSV writer

See the module documentation for examples.

Fields

writer: Writer<W>

The object to write to

has_headers: bool

Whether file should be written with headers, defaults to true

date_format: Option<String>

The date format for date arrays, defaults to RFC3339

datetime_format: Option<String>

The datetime format for datetime arrays, defaults to RFC3339

timestamp_format: Option<String>

The timestamp format for timestamp arrays, defaults to RFC3339

timestamp_tz_format: Option<String>

The timestamp format for timestamp (with timezone) arrays, defaults to RFC3339

time_format: Option<String>

The time format for time arrays, defaults to RFC3339

beginning: bool

Is the beginning-of-writer

null_value: Option<String>

The value to represent null entries, defaults to DEFAULT_NULL_VALUE

ignore_leading_whitespace: bool

Whether to ignore leading whitespace in string values

ignore_trailing_whitespace: bool

Whether to ignore trailing whitespace in string values

Implementations

impl<W: Write> Writer<W>

pub fn new(writer: W) -> Self

Create a new CsvWriter from a writable object, with default options

See WriterBuilder for configure options, and the module documentation for examples.

pub fn write(&mut self, batch: &RecordBatch) -> Result<(), ArrowError>

Write a RecordBatch to the underlying writer

fn get_trimmed_field_bytes<'a>( &self, buffer: &'a str, data_type: &DataType, ) -> &'a [u8]

Returns the bytes for a field, applying whitespace trimming if configured and applicable

pub fn into_inner(self) -> W

Unwraps this Writer<W>, returning the underlying writer.

Trait Implementations

impl<W: Debug + Write> Debug for Writer<W>

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

Formats the value using the given formatter.

impl<W: Write> RecordBatchWriter for Writer<W>

fn write(&mut self, batch: &RecordBatch) -> Result<(), ArrowError>

Write a single batch to the writer.

fn close(self) -> Result<(), ArrowError>

Write footer or termination data, then mark the writer as done.