Struct RangeFrameOffset

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

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:

1. The current value is the maximum value of the type.
2. 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_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 copy of the value.

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

Performs copy-assignment from source.

impl Debug for RangeFrameOffset

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

Formats the value using the given formatter.

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.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

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 ==.

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,