[−][src]Struct arrow::ipc::gen::Schema::DictionaryEncoding
Fields
_tab: Table<'a>
Methods
impl<'a> DictionaryEncoding<'a>
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pub fn init_from_table(table: Table<'a>) -> Self
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pub fn create<'bldr: 'args, 'args: 'mut_bldr, 'mut_bldr>(
_fbb: &'mut_bldr mut FlatBufferBuilder<'bldr>,
args: &'args DictionaryEncodingArgs<'args>
) -> WIPOffset<DictionaryEncoding<'bldr>>
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_fbb: &'mut_bldr mut FlatBufferBuilder<'bldr>,
args: &'args DictionaryEncodingArgs<'args>
) -> WIPOffset<DictionaryEncoding<'bldr>>
pub const VT_ID: VOffsetT
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pub const VT_INDEXTYPE: VOffsetT
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pub const VT_ISORDERED: VOffsetT
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pub fn id(&self) -> i64
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The known dictionary id in the application where this data is used. In the file or streaming formats, the dictionary ids are found in the DictionaryBatch messages
pub fn indexType(&self) -> Option<Int<'a>>
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The dictionary indices are constrained to be positive integers. If this field is null, the indices must be signed int32
pub fn isOrdered(&self) -> bool
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By default, dictionaries are not ordered, or the order does not have semantic meaning. In some statistical, applications, dictionary-encoding is used to represent ordered categorical data, and we provide a way to preserve that metadata here
Trait Implementations
impl<'a> PartialEq<DictionaryEncoding<'a>> for DictionaryEncoding<'a>
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fn eq(&self, other: &DictionaryEncoding<'a>) -> bool
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fn ne(&self, other: &DictionaryEncoding<'a>) -> bool
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impl<'a> Clone for DictionaryEncoding<'a>
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fn clone(&self) -> DictionaryEncoding<'a>
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fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl<'a> Copy for DictionaryEncoding<'a>
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impl<'a> Debug for DictionaryEncoding<'a>
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impl<'a> Follow<'a> for DictionaryEncoding<'a>
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Auto Trait Implementations
impl<'a> Sync for DictionaryEncoding<'a>
impl<'a> Unpin for DictionaryEncoding<'a>
impl<'a> Send for DictionaryEncoding<'a>
impl<'a> UnwindSafe for DictionaryEncoding<'a>
impl<'a> RefUnwindSafe for DictionaryEncoding<'a>
Blanket Implementations
impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
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> From<T> for T
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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<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> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> FromCast<T> for T
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impl<T, U> Cast<U> for T where
U: FromCast<T>,
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U: FromCast<T>,