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SemiJoinReductionThroughAggregate

krishiv_sql::semi_join_reduction

Struct SemiJoinReductionThroughAggregate 

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pub struct SemiJoinReductionThroughAggregate;
Expand description

Push a semi-join built from an inner join’s other side into the input of a grouped aggregate, when the join key is one of the grouping columns.

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impl Debug for SemiJoinReductionThroughAggregate

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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 Default for SemiJoinReductionThroughAggregate

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fn default() -> SemiJoinReductionThroughAggregate

Returns the “default value” for a type. Read more
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impl OptimizerRule for SemiJoinReductionThroughAggregate

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fn name(&self) -> &str

A human readable name for this optimizer rule
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fn apply_order(&self) -> Option<ApplyOrder>

How should the rule be applied by the optimizer? See comments on ApplyOrder for details. Read more
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fn rewrite( &self, plan: LogicalPlan, _config: &dyn OptimizerConfig, ) -> Result<Transformed<LogicalPlan>>

Try to rewrite plan to an optimized form, returning Transformed::yes if the plan was rewritten and Transformed::no if it was not. Read more
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fn supports_rewrite(&self) -> bool

👎Deprecated since 47.0.0:

This method is no longer used

Does this rule support rewriting owned plans (rather than by reference)?

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impl<T> Allocation for T
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fn borrow_mut(&mut self) -> &mut T

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impl<ST, DT> CastableFrom<ST, Initialized, Initialized> for DT
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impl<ST, DT> CastableFrom<ST, Uninit, Uninit> for DT
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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fn with_context(self, otel_cx: Context) -> WithContext<Self> ⓘ

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That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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unsafe fn init(init: <T as Pointable>::Init) -> usize

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Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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