Struct tidb_query_datatype::codec::data_type::ChunkedVecEnum

pub struct ChunkedVecEnum {
    values: ChunkedVecSized<Int>,
    names: ChunkedVecBytes,
}

ChunkedVecEnum is a vector storing Option<Enum>.

Inside ChunkedVecEnum:

• values stores 1-based index enum data offsets, 0 means this enum is ‘’
• names stores the names of enum data

Notes

values and names both maintain a duplicated bitmap. We are not able to store the data in a more compact form because we have to borrow the reference of ChunkedVecSize<Int> and ChunkedVecBytes. The borrowed reference should have the same lifetime with ChunkedVecEnum which cannot be achieved if we don’t store the owned data in struct fields.

TODO: Change to a compact format when TiDB has its Enum/Set EvalType

Fields

values: ChunkedVecSized<Int>

names: ChunkedVecBytes

Implementations

impl ChunkedVecEnum

pub fn get(&self, idx: usize) -> Option<EnumRef<'_>>

pub fn as_vec_int(&self) -> &ChunkedVecSized<Int>

pub fn as_vec_bytes(&self) -> &ChunkedVecBytes

Trait Implementations

impl<'a> ChunkRef<'a, EnumRef<'a>> for &'a ChunkedVecEnum

fn get_option_ref(self, idx: usize) -> Option<EnumRef<'a>>

fn get_bit_vec(self) -> &'a BitVec

fn phantom_data(self) -> Option<EnumRef<'a>>

impl ChunkedVec<Enum> for ChunkedVecEnum

fn from_slice(slice: &[Option<Enum>]) -> Self

fn from_vec(data: Vec<Option<Enum>>) -> Self

fn push(&mut self, value: Option<Enum>)

fn is_empty(&self) -> bool

fn with_capacity(capacity: usize) -> Self

fn push_data(&mut self, value: Enum)

fn push_null(&mut self)

fn len(&self) -> usize

fn truncate(&mut self, len: usize)

fn capacity(&self) -> usize

fn append(&mut self, other: &mut Self)

fn to_vec(&self) -> Vec<Option<Enum>>

impl Clone for ChunkedVecEnum

fn clone(&self) -> ChunkedVecEnum

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ChunkedVecEnum

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

Formats the value using the given formatter.

impl From<ChunkedVecEnum> for VectorValue

fn from(s: ChunkedVecEnum) -> VectorValue

Performs the conversion.

impl From<Vec<Option<Enum>, Global>> for ChunkedVecEnum

fn from(v: Vec<Option<Enum>>) -> ChunkedVecEnum

Performs the conversion.

impl PartialEq<ChunkedVecEnum> for ChunkedVecEnum

fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.

#[must_use]pub fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl<'a> UnsafeRefInto<&'static ChunkedVecEnum> for &'a ChunkedVecEnum

unsafe fn unsafe_into(self) -> &'static ChunkedVecEnum

Safety