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RewriteSetComparison

deltalake::datafusion::optimizer::rewrite_set_comparison

Struct RewriteSetComparison 

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pub struct RewriteSetComparison;
Expand description

Rewrite SetComparison expressions to scalar subqueries that return the correct boolean value (including SQL NULL semantics). After this rule runs, later rules such as ScalarSubqueryToJoin can decorrelate and remove the remaining subquery.

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impl RewriteSetComparison

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pub fn new() -> RewriteSetComparison

Create a new RewriteSetComparison optimizer rule.

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impl Debug for RewriteSetComparison

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

Formats the value using the given formatter. Read more
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impl Default for RewriteSetComparison

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fn default() -> RewriteSetComparison

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

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fn name(&self) -> &str

A human readable name for this optimizer rule
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fn rewrite( &self, plan: LogicalPlan, _config: &dyn OptimizerConfig, ) -> Result<Transformed<LogicalPlan>, DataFusionError>

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 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 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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Convenient wrapper for std::any::type_name, since Any does not provide it and Any::type_id is useless as a debugging aid (its Debug is just a mess of hex digits).
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type Init = T

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