RangeFrameOffset

risingwave_expr::window_function

Struct RangeFrameOffset

pub struct RangeFrameOffset {
    offset: ScalarImpl,
    add_expr: Option<Arc<BoxedExpression>>,
    sub_expr: Option<Arc<BoxedExpression>>,
}

Expand description

The wrapper type for ScalarImpl range frame offset, containing two expressions to help adding and subtracting the offset.

Fields§

§offset: ScalarImpl

The original offset value.

§add_expr: Option<Arc<BoxedExpression>>

Built expression for $0 + offset.

§sub_expr: Option<Arc<BoxedExpression>>

Built expression for $0 - offset.

Implementations§

impl RangeFrameOffset

pub fn new(offset: ScalarImpl) -> Self

fn prepare( &mut self, order_data_type: &DataType, offset_data_type: &DataType, ) -> Result<()>

pub fn new_for_test( offset: ScalarImpl, order_data_type: &DataType, offset_data_type: &DataType, ) -> Self

Methods from Deref<Target = ScalarImpl>§

pub fn get_ident(&self) -> &'static str

pub fn successor(&self) -> Option<ScalarImpl>

Returns the successor of the current value if it exists.

See also Successor.

The function may return None when:

The current value is the maximum value of the type.
The successor value of the type is not well-defined.

pub fn as_int16(&self) -> &i16

§Panics

If the scalar is not of the expected type.

pub fn as_int32(&self) -> &i32

§Panics

If the scalar is not of the expected type.

pub fn as_int64(&self) -> &i64

§Panics

If the scalar is not of the expected type.

pub fn as_int256(&self) -> &Int256

§Panics

If the scalar is not of the expected type.

pub fn as_float32(&self) -> &OrderedFloat<f32>

§Panics

If the scalar is not of the expected type.

pub fn as_float64(&self) -> &OrderedFloat<f64>

§Panics

If the scalar is not of the expected type.

pub fn as_utf8(&self) -> &Box<str>

§Panics

If the scalar is not of the expected type.

pub fn as_bool(&self) -> &bool

§Panics

If the scalar is not of the expected type.

pub fn as_decimal(&self) -> &Decimal

§Panics

If the scalar is not of the expected type.

pub fn as_interval(&self) -> &Interval

§Panics

If the scalar is not of the expected type.

pub fn as_date(&self) -> &Date

§Panics

If the scalar is not of the expected type.

pub fn as_time(&self) -> &Time

§Panics

If the scalar is not of the expected type.

pub fn as_timestamp(&self) -> &Timestamp

§Panics

If the scalar is not of the expected type.

pub fn as_timestamptz(&self) -> &Timestamptz

§Panics

If the scalar is not of the expected type.

pub fn as_jsonb(&self) -> &JsonbVal

§Panics

If the scalar is not of the expected type.

pub fn as_serial(&self) -> &Serial

§Panics

If the scalar is not of the expected type.

pub fn as_struct(&self) -> &StructValue

§Panics

If the scalar is not of the expected type.

pub fn as_list(&self) -> &ListValue

§Panics

If the scalar is not of the expected type.

pub fn as_map(&self) -> &MapValue

§Panics

If the scalar is not of the expected type.

pub fn as_vector(&self) -> &VectorInner<Box<[OrderedFloat<f32>]>>

§Panics

If the scalar is not of the expected type.

pub fn as_bytea(&self) -> &Box<[u8]>

§Panics

If the scalar is not of the expected type.

pub fn as_scalar_ref_impl(&self) -> ScalarRefImpl<'_>

Converts ScalarImpl to ScalarRefImpl

pub fn serialize(&self, ser: &mut Serializer<impl BufMut>) -> Result<(), Error>

Serialize the scalar into the memcomparable format.

pub fn as_integral(&self) -> i64

Trait Implementations§

impl Clone for RangeFrameOffset

fn clone(&self) -> RangeFrameOffset

Returns a duplicate of the value. Read more

1.0.0 · Source§

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

Performs copy-assignment from source. Read more

impl Debug for RangeFrameOffset

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

Formats the value using the given formatter. Read more

impl Deref for RangeFrameOffset

type Target = ScalarImpl

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Hash for RangeFrameOffset
where ScalarImpl: Hash,

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher. Read more

1.3.0 · Source§

fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more

impl PartialEq for RangeFrameOffset
where ScalarImpl: PartialEq,

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

Tests for self and other values to be equal, and is used by ==.

1.0.0 · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for RangeFrameOffset
where ScalarImpl: PartialEq,

Auto Trait Implementations§

impl Freeze for RangeFrameOffset

impl !RefUnwindSafe for RangeFrameOffset

impl Send for RangeFrameOffset

impl Sync for RangeFrameOffset

impl Unpin for RangeFrameOffset

impl !UnwindSafe for RangeFrameOffset

Blanket Implementations§

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