Struct mz_transform::compound::union::UnionNegateFusion

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pub struct UnionNegateFusion;
Expand description

Fuses Union and Negate operators into one Union and multiple Negate operators.

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impl UnionNegateFusion

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pub fn action(relation: &mut MirRelationExpr)

Fuses multiple Union operators into one. Nested negated unions are merged into the parent one by pushing the Negate to all their inputs.

Trait Implementations§

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impl Debug for UnionNegateFusion

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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 Transform for UnionNegateFusion

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fn name(&self) -> &'static str

A short string naming the transform, as it will be reported in metrics.
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fn actually_perform_transform( &self, relation: &mut MirRelationExpr, _: &mut TransformCtx<'_>, ) -> Result<(), TransformError>

Transform a relation into a functionally equivalent relation. Read more
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fn transform( &self, relation: &mut MirRelationExpr, args: &mut TransformCtx<'_>, ) -> Result<(), TransformError>

Transforms a relation into a functionally equivalent relation. Read more
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fn debug(&self) -> String

A string describing the transform. Read more

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fn type_id(&self) -> TypeId

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fn fmt_binary(self) -> FmtBinary<Self>
where Self: Binary,

Causes self to use its Binary implementation when Debug-formatted.
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fn fmt_display(self) -> FmtDisplay<Self>
where Self: Display,

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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fn fmt_octal(self) -> FmtOctal<Self>
where Self: Octal,

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

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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where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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