Struct arrow::ipc::gen::Schema::DictionaryEncoding [−][src]
pub struct DictionaryEncoding<'a> {
pub _tab: Table<'a>,
}
Fields
_tab: Table<'a>
Implementations
pub fn create<'bldr: 'args, 'args: 'mut_bldr, 'mut_bldr>(
_fbb: &'mut_bldr mut FlatBufferBuilder<'bldr>,
args: &'args DictionaryEncodingArgs<'args>
) -> WIPOffset<DictionaryEncoding<'bldr>>
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
The dictionary indices are constrained to be non-negative integers. If this field is null, the indices must be signed int32. To maximize cross-language compatibility and performance, implementations are recommended to prefer signed integer types over unsigned integer types and to avoid uint64 indices unless they are required by an application.
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
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
Runs the verifier for this type, assuming its at position pos
in the verifier’s buffer.
Should not need to be called directly. Read more
Auto Trait Implementations
impl<'a> RefUnwindSafe for DictionaryEncoding<'a>
impl<'a> Send for DictionaryEncoding<'a>
impl<'a> Sync for DictionaryEncoding<'a>
impl<'a> Unpin for DictionaryEncoding<'a>
impl<'a> UnwindSafe for DictionaryEncoding<'a>
Blanket Implementations
Mutably borrows from an owned value. Read more