[−][src]Struct arrow::datatypes::Field
Contains the meta-data for a single relative type.
The Schema
object is an ordered collection of Field
objects.
Implementations
impl Field
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pub fn new(name: &str, data_type: DataType, nullable: bool) -> Self
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Creates a new field
pub fn new_dict(
name: &str,
data_type: DataType,
nullable: bool,
dict_id: i64,
dict_is_ordered: bool
) -> Self
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name: &str,
data_type: DataType,
nullable: bool,
dict_id: i64,
dict_is_ordered: bool
) -> Self
Creates a new field
pub fn name(&self) -> &String
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Returns an immutable reference to the Field
's name
pub fn data_type(&self) -> &DataType
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Returns an immutable reference to the Field
's data-type
pub fn is_nullable(&self) -> bool
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Indicates whether this Field
supports null values
pub fn from(json: &Value) -> Result<Self>
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Parse a Field
definition from a JSON representation
pub fn to_json(&self) -> Value
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Generate a JSON representation of the Field
pub fn try_merge(&mut self, from: &Field) -> Result<()>
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Merge field into self if it is compatible. Struct will be merged recursively.
Example:
use arrow::datatypes::*; let mut field = Field::new("c1", DataType::Int64, false); assert!(field.try_merge(&Field::new("c1", DataType::Int64, true)).is_ok()); assert!(field.is_nullable());
Trait Implementations
impl Clone for Field
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impl Debug for Field
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impl<'de> Deserialize<'de> for Field
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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
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__D: Deserializer<'de>,
impl Display for Field
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impl Eq for Field
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impl<'a> From<Field<'a>> for Field
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Convert an IPC Field to Arrow Field
impl Hash for Field
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fn hash<__H: Hasher>(&self, state: &mut __H)
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fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,
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H: Hasher,
impl Ord for Field
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fn cmp(&self, other: &Field) -> Ordering
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#[must_use]fn max(self, other: Self) -> Self
1.21.0[src]
#[must_use]fn min(self, other: Self) -> Self
1.21.0[src]
#[must_use]fn clamp(self, min: Self, max: Self) -> Self
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impl PartialEq<Field> for Field
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impl PartialOrd<Field> for Field
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fn partial_cmp(&self, other: &Field) -> Option<Ordering>
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fn lt(&self, other: &Field) -> bool
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fn le(&self, other: &Field) -> bool
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fn gt(&self, other: &Field) -> bool
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fn ge(&self, other: &Field) -> bool
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impl Serialize for Field
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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
__S: Serializer,
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__S: Serializer,
impl StructuralEq for Field
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impl StructuralPartialEq for Field
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Auto Trait Implementations
impl RefUnwindSafe for Field
impl Send for Field
impl Sync for Field
impl Unpin for Field
impl UnwindSafe for Field
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T> DeserializeOwned for T where
T: for<'de> Deserialize<'de>,
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T: for<'de> Deserialize<'de>,
impl<Q, K> Equivalent<K> for Q where
K: Borrow<Q> + ?Sized,
Q: Eq + ?Sized,
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K: Borrow<Q> + ?Sized,
Q: Eq + ?Sized,
fn equivalent(&self, key: &K) -> bool
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impl<T> From<T> for T
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impl<T> Instrument for T
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fn instrument(self, span: Span) -> Instrumented<Self>
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fn in_current_span(self) -> Instrumented<Self>
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> IntoRequest<T> for T
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fn into_request(self) -> Request<T>
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impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<V, T> VZip<V> for T where
V: MultiLane<T>,
V: MultiLane<T>,
fn vzip(self) -> V
impl<T> WithSubscriber for T
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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
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S: Into<Dispatch>,