Trait odbc_api::buffers::Item

pub trait Item: Sized + Copy {
    const BUFFER_KIND: BufferKind;

    fn as_slice(variant: AnyColumnView<'_>) -> Option<&[Self]>;
    fn as_nullable_slice(
        variant: AnyColumnView<'_>
    ) -> Option<NullableSlice<'_, Self>>;
    fn as_slice_mut(variant: AnyColumnSliceMut<'_>) -> Option<&mut [Self]>;
    fn as_nullable_slice_mut(
        variant: AnyColumnSliceMut<'_>
    ) -> Option<NullableSliceMut<'_, Self>>;
}

Can either be extracted as a slice or a NullableSlice from an AnyColumnView. This allows the user to avoid matching on all possibile variants of an AnyColumnView in case the buffered type is known at compile time.

Required Associated Constants

const BUFFER_KIND: BufferKind

E.g. BufferKind::I64 for i64. The kind can be used in a buffer description to instantiate a super::ColumnarBuffer.

Required Methods

fn as_slice(variant: AnyColumnView<'_>) -> Option<&[Self]>

Extract the array type from an AnyColumnView.

fn as_nullable_slice(
    variant: AnyColumnView<'_>
) -> Option<NullableSlice<'_, Self>>

Extract the typed nullable buffer from an AnyColumnView.

fn as_slice_mut(variant: AnyColumnSliceMut<'_>) -> Option<&mut [Self]>

Extract the array type from an AnyColumnSliceMut.

fn as_nullable_slice_mut(
    variant: AnyColumnSliceMut<'_>
) -> Option<NullableSliceMut<'_, Self>>

Extract the typed nullable buffer from an AnyColumnSliceMut.

Implementations on Foreign Types

impl Item for f64

const BUFFER_KIND: BufferKind = BufferKind::F64

fn as_slice(variant: AnyColumnView<'_>) -> Option<&[Self]>

fn as_nullable_slice(
    variant: AnyColumnView<'_>
) -> Option<NullableSlice<'_, Self>>

fn as_slice_mut<'a>(variant: AnyColumnSliceMut<'a>) -> Option<&'a mut [Self]>

fn as_nullable_slice_mut<'a>(
    variant: AnyColumnSliceMut<'a>
) -> Option<NullableSliceMut<'a, Self>>

impl Item for f32

const BUFFER_KIND: BufferKind = BufferKind::F32

fn as_slice(variant: AnyColumnView<'_>) -> Option<&[Self]>

fn as_nullable_slice(
    variant: AnyColumnView<'_>
) -> Option<NullableSlice<'_, Self>>

fn as_slice_mut<'a>(variant: AnyColumnSliceMut<'a>) -> Option<&'a mut [Self]>

fn as_nullable_slice_mut<'a>(
    variant: AnyColumnSliceMut<'a>
) -> Option<NullableSliceMut<'a, Self>>

impl Item for u8

const BUFFER_KIND: BufferKind = BufferKind::U8

fn as_slice(variant: AnyColumnView<'_>) -> Option<&[Self]>

fn as_nullable_slice(
    variant: AnyColumnView<'_>
) -> Option<NullableSlice<'_, Self>>

fn as_slice_mut<'a>(variant: AnyColumnSliceMut<'a>) -> Option<&'a mut [Self]>

fn as_nullable_slice_mut<'a>(
    variant: AnyColumnSliceMut<'a>
) -> Option<NullableSliceMut<'a, Self>>

impl Item for i8

const BUFFER_KIND: BufferKind = BufferKind::I8

fn as_slice(variant: AnyColumnView<'_>) -> Option<&[Self]>

fn as_nullable_slice(
    variant: AnyColumnView<'_>
) -> Option<NullableSlice<'_, Self>>

fn as_slice_mut<'a>(variant: AnyColumnSliceMut<'a>) -> Option<&'a mut [Self]>

fn as_nullable_slice_mut<'a>(
    variant: AnyColumnSliceMut<'a>
) -> Option<NullableSliceMut<'a, Self>>

impl Item for i16

const BUFFER_KIND: BufferKind = BufferKind::I16

fn as_slice(variant: AnyColumnView<'_>) -> Option<&[Self]>

fn as_nullable_slice(
    variant: AnyColumnView<'_>
) -> Option<NullableSlice<'_, Self>>

fn as_slice_mut<'a>(variant: AnyColumnSliceMut<'a>) -> Option<&'a mut [Self]>

fn as_nullable_slice_mut<'a>(
    variant: AnyColumnSliceMut<'a>
) -> Option<NullableSliceMut<'a, Self>>

impl Item for i32

const BUFFER_KIND: BufferKind = BufferKind::I32

fn as_slice(variant: AnyColumnView<'_>) -> Option<&[Self]>

fn as_nullable_slice(
    variant: AnyColumnView<'_>
) -> Option<NullableSlice<'_, Self>>

fn as_slice_mut<'a>(variant: AnyColumnSliceMut<'a>) -> Option<&'a mut [Self]>

fn as_nullable_slice_mut<'a>(
    variant: AnyColumnSliceMut<'a>
) -> Option<NullableSliceMut<'a, Self>>

impl Item for i64

const BUFFER_KIND: BufferKind = BufferKind::I64

fn as_slice(variant: AnyColumnView<'_>) -> Option<&[Self]>

fn as_nullable_slice(
    variant: AnyColumnView<'_>
) -> Option<NullableSlice<'_, Self>>

fn as_slice_mut<'a>(variant: AnyColumnSliceMut<'a>) -> Option<&'a mut [Self]>

fn as_nullable_slice_mut<'a>(
    variant: AnyColumnSliceMut<'a>
) -> Option<NullableSliceMut<'a, Self>>

impl Item for Date

const BUFFER_KIND: BufferKind = BufferKind::Date

fn as_slice(variant: AnyColumnView<'_>) -> Option<&[Self]>

fn as_nullable_slice(
    variant: AnyColumnView<'_>
) -> Option<NullableSlice<'_, Self>>

fn as_slice_mut<'a>(variant: AnyColumnSliceMut<'a>) -> Option<&'a mut [Self]>

fn as_nullable_slice_mut<'a>(
    variant: AnyColumnSliceMut<'a>
) -> Option<NullableSliceMut<'a, Self>>

impl Item for Time

const BUFFER_KIND: BufferKind = BufferKind::Time

fn as_slice(variant: AnyColumnView<'_>) -> Option<&[Self]>

fn as_nullable_slice(
    variant: AnyColumnView<'_>
) -> Option<NullableSlice<'_, Self>>

fn as_slice_mut<'a>(variant: AnyColumnSliceMut<'a>) -> Option<&'a mut [Self]>

fn as_nullable_slice_mut<'a>(
    variant: AnyColumnSliceMut<'a>
) -> Option<NullableSliceMut<'a, Self>>

impl Item for Timestamp

const BUFFER_KIND: BufferKind = BufferKind::Timestamp

fn as_slice(variant: AnyColumnView<'_>) -> Option<&[Self]>

fn as_nullable_slice(
    variant: AnyColumnView<'_>
) -> Option<NullableSlice<'_, Self>>

fn as_slice_mut<'a>(variant: AnyColumnSliceMut<'a>) -> Option<&'a mut [Self]>

fn as_nullable_slice_mut<'a>(
    variant: AnyColumnSliceMut<'a>
) -> Option<NullableSliceMut<'a, Self>>

Implementors

impl Item for Bit

const BUFFER_KIND: BufferKind = BufferKind::Bit