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ResolveLambdaVariables

datafusion_python::analyzer

Struct ResolveLambdaVariables 

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pub struct ResolveLambdaVariables {}
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Resolve LambdaVariable references into bound lambda parameters.

DataFusion’s SQL planner resolves lambda variables inline as it plans a higher-order function call, so SQL-built plans never carry unresolved variables. Plans assembled programmatically through the Python expression builder (e.g. array_transform(col("xs"), lambda_(["v"], lambda_var("v")))) do carry them, and nothing in the default analyzer resolves them. This rule runs LogicalPlan::resolve_lambda_variables so both construction paths reach the optimizer with bound lambdas.

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impl AnalyzerRule for ResolveLambdaVariables

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fn analyze( &self, plan: LogicalPlan, _config: &ConfigOptions, ) -> Result<LogicalPlan>

Rewrite plan
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fn name(&self) -> &str

A human readable name for this analyzer rule
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impl Debug for ResolveLambdaVariables

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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 ResolveLambdaVariables

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fn default() -> Self

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

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type GuardMut<'a> = MutAs<'a, T, As> where T: 'a

The type of the guard which will clean up the temporary after applying its changes to the original.
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fn guard_mut_inner(&mut self) -> <T as IGuardMut<As>>::GuardMut<'_>

Construct the temporary and guard it through a mutable reference.
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impl<T, As> IGuardRef<As> for T
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type Guard<'a> = RefAs<'a, T, As> where T: 'a

The type of the guard which will clean up the temporary.
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fn guard_ref_inner(&self) -> <T as IGuardRef<As>>::Guard<'_>

Construct the temporary and guard it through an immutable reference.
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type Output = End

The result
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fn instrument(self, span: Span) -> Instrumented<Self>

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