Class SimplifyRedundantCase

java.lang.Object

io.trino.sql.ir.optimizer.rule.SimplifyRedundantCase

All Implemented Interfaces:

IrOptimizerRule

public class SimplifyRedundantCase
extends Object
implements IrOptimizerRule

Simplify CASE expressions with constant TRUE/FALSE results:

• Case([When(a, true), When(b, false), When(c, true)], false) -> $identical(Or(a, c), true)
• Case([When(a, true), When(b, false), When(c, false)], true) -> $not($identical(Or(b, c), true)

Constructor Summary

Constructors

Constructor	Description
SimplifyRedundantCase(PlannerContext context)

Method Summary

Modifier and Type	Method	Description
Optional<Expression>	apply(Expression expression, Session session, Map<Symbol,Expression> bindings)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SimplifyRedundantCase

public SimplifyRedundantCase(PlannerContext context)

Method Details

apply

public Optional<Expression> apply(Expression expression,
 Session session,
 Map<Symbol,Expression> bindings)

Specified by:

apply in interface IrOptimizerRule