org.apache.drill.exec.expr

Class IsPredicate<C extends Comparable<C>>

java.lang.Object

org.apache.drill.common.expression.LogicalExpressionBase

org.apache.drill.exec.expr.IsPredicate<C>

All Implemented Interfaces:

Iterable<LogicalExpression>, LogicalExpression, FilterPredicate<C>

public class IsPredicate<C extends Comparable<C>>
extends LogicalExpressionBase
implements FilterPredicate<C>

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.drill.common.expression.LogicalExpression

LogicalExpression.De, LogicalExpression.Se

Method Summary

Modifier and Type	Method and Description
<T,V,E extends Exception> T	accept(ExprVisitor<T,V,E> visitor, V value)
static <C extends Comparable<C>> LogicalExpression	createIsPredicate(String function, LogicalExpression expr)
static boolean	isNullOrEmpty(ColumnStatistics<?> stat)
Iterator<LogicalExpression>	iterator()
RowsMatch	matches(StatisticsProvider<C> evaluator) Apply the filter condition against the meta of the rowgroup.

Methods inherited from class org.apache.drill.common.expression.LogicalExpressionBase

getCumulativeCost, getDescription, getMajorType, getPosition, getSelfCost, i

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Method Detail

iterator

public Iterator<LogicalExpression> iterator()

Specified by:

iterator in interface Iterable<LogicalExpression>

accept

public <T,V,E extends Exception> T accept(ExprVisitor<T,V,E> visitor,
                                          V value)
                                   throws E extends Exception

Specified by:

accept in interface LogicalExpression

Throws:

E extends Exception

matches

public RowsMatch matches(StatisticsProvider<C> evaluator)

Apply the filter condition against the meta of the rowgroup.

Specified by:

matches in interface FilterPredicate<C extends Comparable<C>>

isNullOrEmpty

public static boolean isNullOrEmpty(ColumnStatistics<?> stat)

Parameters:

stat - statistics object

Returns:

true if the input stat object is null or has invalid statistics; false otherwise

createIsPredicate

public static <C extends Comparable<C>> LogicalExpression createIsPredicate(String function,
                                                                            LogicalExpression expr)