org.apache.calcite.adapter.enumerable

Class RexImpTable.IsXxxImplementor

java.lang.Object

org.apache.calcite.adapter.enumerable.RexImpTable.IsXxxImplementor

All Implemented Interfaces:

CallImplementor

Enclosing class:

RexImpTable

private static class RexImpTable.IsXxxImplementor
extends Object
implements CallImplementor

Implements "IS XXX" operations such as "IS NULL" or "IS NOT TRUE".

What these operators have in common:

1. They return TRUE or FALSE, never NULL. 2. Of the 3 input values (TRUE, FALSE, NULL) they return TRUE for 1 or 2, FALSE for the other 2 or 1.

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	negate
private Boolean	seek

Constructor Summary

Constructors

Constructor and Description
IsXxxImplementor(Boolean seek, boolean negate)

Method Summary

Modifier and Type	Method and Description
Expression	implement(RexToLixTranslator translator, RexCall call, RexImpTable.NullAs nullAs) Implements a call.

Methods inherited from class java.lang.Object

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

Field Detail

seek

private final Boolean seek

negate

private final boolean negate

Constructor Detail

IsXxxImplementor

IsXxxImplementor(Boolean seek,
                 boolean negate)

Method Detail

implement

public Expression implement(RexToLixTranslator translator,
                            RexCall call,
                            RexImpTable.NullAs nullAs)

Description copied from interface: CallImplementor

Implements a call.

Specified by:

implement in interface CallImplementor

Parameters:

translator - Translator for the call

call - Call that should be implemented

nullAs - The desired mode of null translation

Returns:

Translated call