Trait tidb_query_datatype::codec::data_type::Evaluable

pub trait Evaluable: Clone + Debug + Send + Sync + 'static {
    const EVAL_TYPE: EvalType;

    fn borrow_scalar_value(v: &ScalarValue) -> Option<&Self>;
    fn borrow_scalar_value_ref(v: ScalarValueRef<'_>) -> Option<&Self>;
    fn borrow_vector_value(v: &VectorValue) -> &ChunkedVecSized<Self>;
}

A trait of all types that can be used during evaluation (eval type).

Associated Constants

const EVAL_TYPE: EvalType

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Required methods

fn borrow_scalar_value(v: &ScalarValue) -> Option<&Self>

Borrows this concrete type from a ScalarValue in the same type; panics if the varient mismatches.

fn borrow_scalar_value_ref(v: ScalarValueRef<'_>) -> Option<&Self>

Borrows this concrete type from a ScalarValueRef in the same type; panics if the varient mismatches.

fn borrow_vector_value(v: &VectorValue) -> &ChunkedVecSized<Self>

Borrows a slice of this concrete type from a VectorValue in the same type; panics if the varient mismatches.

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Implementors

impl Evaluable for Decimal

const EVAL_TYPE: EvalType

fn borrow_scalar_value(v: &ScalarValue) -> Option<&Self>

fn borrow_scalar_value_ref<'a>(v: ScalarValueRef<'a>) -> Option<&'a Self>

fn borrow_vector_value(v: &VectorValue) -> &ChunkedVecSized<Decimal>

impl Evaluable for Duration

const EVAL_TYPE: EvalType

fn borrow_scalar_value(v: &ScalarValue) -> Option<&Self>

fn borrow_scalar_value_ref<'a>(v: ScalarValueRef<'a>) -> Option<&'a Self>

fn borrow_vector_value(v: &VectorValue) -> &ChunkedVecSized<Duration>

impl Evaluable for DateTime

const EVAL_TYPE: EvalType

fn borrow_scalar_value(v: &ScalarValue) -> Option<&Self>

fn borrow_scalar_value_ref<'a>(v: ScalarValueRef<'a>) -> Option<&'a Self>

fn borrow_vector_value(v: &VectorValue) -> &ChunkedVecSized<DateTime>

impl Evaluable for Int

const EVAL_TYPE: EvalType

fn borrow_scalar_value(v: &ScalarValue) -> Option<&Self>

fn borrow_scalar_value_ref(v: ScalarValueRef<'_>) -> Option<&Self>

fn borrow_vector_value(v: &VectorValue) -> &ChunkedVecSized<Int>

impl Evaluable for Real

const EVAL_TYPE: EvalType

fn borrow_scalar_value(v: &ScalarValue) -> Option<&Self>

fn borrow_scalar_value_ref<'a>(v: ScalarValueRef<'a>) -> Option<&'a Self>

fn borrow_vector_value(v: &VectorValue) -> &ChunkedVecSized<Real>

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