Writer

datafusion::common::arrow::csv

Struct Writer 

pub struct Writer<W>
where
    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>,
}
Expand description

A CSV writer

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§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>

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impl<W> Writer<W>
where W: Write,

pub fn new(writer: W) -> Writer<W>

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

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

Write a RecordBatch to a writable object

pub fn into_inner(self) -> W

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

Trait Implementations§

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

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

Formats the value using the given formatter. Read more
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impl<W> RecordBatchWriter for Writer<W>
where W: Write,

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

Write a single batch to the writer.
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fn close(self) -> Result<(), ArrowError>

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

Auto Trait Implementations§

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impl<W> Freeze for Writer<W>
where W: Freeze,

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impl<W> RefUnwindSafe for Writer<W>
where W: RefUnwindSafe,

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impl<W> Send for Writer<W>
where W: Send,

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impl<W> Sync for Writer<W>
where W: Sync,

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impl<W> Unpin for Writer<W>
where W: Unpin,

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impl<W> UnwindSafe for Writer<W>
where W: UnwindSafe,

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> PolicyExt for T
where T: ?Sized,

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fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns [Action::Follow] only if self and other return Action::Follow. Read more
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fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns [Action::Follow] if either self or other returns Action::Follow. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,

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impl<T> ErasedDestructor for T
where T: 'static,