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HavingRightOperand

drive::query::having

Enum HavingRightOperand 

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pub enum HavingRightOperand {
    Value(Value),
    Ranking(HavingRanking),
}
Expand description

Right-side operand of a HavingClause. Either a concrete value (literal scalar or list-shaped operand for BETWEEN*/IN) or a cross-group ranking reference (HavingRanking).

The split lives at the type level so the wire decoder rejects half-built clauses (“operator says IN, right side is MIN ranking with n set”) at conversion time rather than letting them reach the evaluator as ambiguous state.

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Value(Value)

Concrete value: scalar for = / != / < / <= / > / >=; 2-element list [lower, upper] for Between*; list of candidates for In.

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Ranking(HavingRanking)

Cross-group ranking reference. Operator compatibility: scalar comparison operators work with Min / Max / Top(1) / Bottom(1); In works with Top(N) / Bottom(N) (membership in the top-N / bottom-N set).

Trait Implementations§

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impl Clone for HavingRightOperand

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fn clone(&self) -> HavingRightOperand

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for HavingRightOperand

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for HavingRightOperand

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl PartialEq for HavingRightOperand

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>
where __S: Serializer,

Serialize this value into the given Serde serializer. Read more
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impl StructuralPartialEq for HavingRightOperand

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impl<T> Any for T
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Gets the TypeId of self. Read more
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Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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Wraps any value into a CostContext object with provided costs.
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Causes self to use its Display implementation when Debug-formatted.
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fn fmt_lower_exp(self) -> FmtLowerExp<Self>
where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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Causes self to use its Pointer implementation when Debug-formatted.
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fn fmt_upper_exp(self) -> FmtUpperExp<Self>
where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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fn fmt_upper_hex(self) -> FmtUpperHex<Self>
where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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fn fmt_list(self) -> FmtList<Self>
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Formats each item in a sequence. Read more
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