org.apache.derby.impl.sql.compile

Class InListOperatorNode

java.lang.Object

org.apache.derby.impl.sql.compile.QueryTreeNode

org.apache.derby.impl.sql.compile.ValueNode

org.apache.derby.impl.sql.compile.BinaryListOperatorNode

org.apache.derby.impl.sql.compile.InListOperatorNode

All Implemented Interfaces:

Visitable

public final class InListOperatorNode
extends BinaryListOperatorNode

An InListOperatorNode represents an IN list.

Method Summary

Modifier and Type	Method and Description
double	selectivity(Optimizable optTable) The selectivity for an "IN" predicate is generally very small.
java.lang.String	toString() Convert this object to a String.

Methods inherited from class org.apache.derby.impl.sql.compile.ValueNode

checkIsBoolean, setCollationInfo, setCollationInfo, setNullability, updatableByCursor

Methods inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

accept, addTag, bindOffsetFetch, bindRowMultiSet, bindUserCatalogType, bindUserType, checkReliability, checkReliability, createTypeDependency, getBeginOffset, getDataDictionary, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getOffsetOrderedNodes, getOptimizerFactory, getOptimizerTracer, getParameterTypes, getUDTDesc, isAtomic, makeConstantAction, makeTableName, makeTableName, optimizerTracingIsOn, orReliability, referencesSessionSchema, setBeginOffset, setEndOffset, taggedWith, treePrint

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

toString

public java.lang.String toString()

Convert this object to a String. See comments in QueryTreeNode.java for how this should be done for tree printing.

Overrides:

toString in class BinaryListOperatorNode

Returns:

This object as a String

selectivity

public double selectivity(Optimizable optTable)

The selectivity for an "IN" predicate is generally very small. This is an estimate applicable when in list are not all constants.

Overrides:

selectivity in class ValueNode