Struct RewriteSetComparison 

pub struct RewriteSetComparison;

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.

Implementations

impl RewriteSetComparison

pub fn new() -> Self

Create a new RewriteSetComparison optimizer rule.

Trait Implementations

impl Debug for RewriteSetComparison

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

Formats the value using the given formatter.

impl Default for RewriteSetComparison

fn default() -> RewriteSetComparison

Returns the “default value” for a type.

impl OptimizerRule for RewriteSetComparison

fn name(&self) -> &str

A human readable name for this optimizer rule

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.

fn apply_order(&self) -> Option<ApplyOrder>

How should the rule be applied by the optimizer? See comments on ApplyOrder for details.

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)?