#[repr(C)]
pub struct FFI_ArrowSchema { /* private fields */ }
Expand description

ABI-compatible struct for ArrowSchema from C Data Interface See https://arrow.apache.org/docs/format/CDataInterface.html#structure-definitions

fn array_schema(data_type: &DataType) -> FFI_ArrowSchema {
    FFI_ArrowSchema::try_from(data_type).unwrap()
}

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impl FFI_ArrowSchema

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pub fn try_new( format: &str, children: Vec<FFI_ArrowSchema>, dictionary: Option<FFI_ArrowSchema> ) -> Result<Self, ArrowError>

create a new FFI_ArrowSchema. This fails if the fields’ DataType is not supported.

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pub fn with_name(self, name: &str) -> Result<Self, ArrowError>

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pub fn with_flags(self, flags: Flags) -> Result<Self, ArrowError>

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pub fn with_metadata<I, S>(self, metadata: I) -> Result<Self, ArrowError>where I: IntoIterator<Item = (S, S)>, S: AsRef<str>,

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pub fn empty() -> Self

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pub fn format(&self) -> &str

returns the format of this schema.

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pub fn name(&self) -> &str

returns the name of this schema.

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pub fn flags(&self) -> Option<Flags>

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pub fn child(&self, index: usize) -> &Self

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pub fn children(&self) -> impl Iterator<Item = &Self>

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pub fn nullable(&self) -> bool

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pub fn dictionary(&self) -> Option<&Self>

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pub fn map_keys_sorted(&self) -> bool

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pub fn dictionary_ordered(&self) -> bool

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pub fn metadata(&self) -> Result<HashMap<String, String>, ArrowError>

Trait Implementations§

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impl Debug for FFI_ArrowSchema

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

Formats the value using the given formatter. Read more
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impl Drop for FFI_ArrowSchema

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl TryFrom<&Arc<Field, Global>> for FFI_ArrowSchema

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type Error = ArrowError

The type returned in the event of a conversion error.
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fn try_from(value: &FieldRef) -> Result<Self, Self::Error>

Performs the conversion.
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impl TryFrom<&DataType> for FFI_ArrowSchema

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fn try_from(dtype: &DataType) -> Result<Self, ArrowError>

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type Error = ArrowError

The type returned in the event of a conversion error.
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impl TryFrom<&FFI_ArrowSchema> for DataType

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fn try_from(c_schema: &FFI_ArrowSchema) -> Result<Self, ArrowError>

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type Error = ArrowError

The type returned in the event of a conversion error.
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impl TryFrom<&FFI_ArrowSchema> for Field

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type Error = ArrowError

The type returned in the event of a conversion error.
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fn try_from(c_schema: &FFI_ArrowSchema) -> Result<Self, ArrowError>

Performs the conversion.
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impl TryFrom<&FFI_ArrowSchema> for Schema

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type Error = ArrowError

The type returned in the event of a conversion error.
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fn try_from(c_schema: &FFI_ArrowSchema) -> Result<Self, ArrowError>

Performs the conversion.
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impl TryFrom<&Field> for FFI_ArrowSchema

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type Error = ArrowError

The type returned in the event of a conversion error.
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fn try_from(field: &Field) -> Result<Self, ArrowError>

Performs the conversion.
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impl TryFrom<&Schema> for FFI_ArrowSchema

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type Error = ArrowError

The type returned in the event of a conversion error.
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fn try_from(schema: &Schema) -> Result<Self, ArrowError>

Performs the conversion.
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impl TryFrom<DataType> for FFI_ArrowSchema

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type Error = ArrowError

The type returned in the event of a conversion error.
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fn try_from(dtype: DataType) -> Result<Self, ArrowError>

Performs the conversion.
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impl TryFrom<Field> for FFI_ArrowSchema

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type Error = ArrowError

The type returned in the event of a conversion error.
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fn try_from(field: Field) -> Result<Self, ArrowError>

Performs the conversion.
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impl TryFrom<Schema> for FFI_ArrowSchema

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type Error = ArrowError

The type returned in the event of a conversion error.
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fn try_from(schema: Schema) -> Result<Self, ArrowError>

Performs the conversion.

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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, U> Into<U> for Twhere 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, U> TryFrom<U> for Twhere 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 Twhere 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.