com.facebook.presto.common.predicate

Class FilterFunction

java.lang.Object

com.facebook.presto.common.predicate.FilterFunction

public class FilterFunction
extends Object

Constructor Summary

Constructors

Constructor and Description
FilterFunction(SqlFunctionProperties properties, boolean deterministic, Predicate predicate)

Method Summary

Modifier and Type	Method and Description
int	filter(Page page, int[] positions, int positionCount, RuntimeException[] errors) Evaluates specified positions and returns the number of positions that passed the filter.
int[]	getInputChannels()
boolean	isDeterministic()

Methods inherited from class java.lang.Object

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

Constructor Detail

FilterFunction

public FilterFunction(SqlFunctionProperties properties,
                      boolean deterministic,
                      Predicate predicate)

Method Detail

filter

public int filter(Page page,
                  int[] positions,
                  int positionCount,
                  RuntimeException[] errors)

Evaluates specified positions and returns the number of positions that passed the filter.

Upon return, the positions array will contain positions that passed the filter or encountered an error. The errors array will contain errors that occurred while evaluating this filter as well as errors that happened earlier. The latter will be preserved only for positions that passed this filter.

Parameters:

positions - Monotonically increasing list of positions to evaluate

positionCount - Number of valid entries in the positions array

errors - Errors encountered while evaluating other filters, if any; contains at least positionCount entries; null value indicates no error

getInputChannels

public int[] getInputChannels()

isDeterministic

public boolean isDeterministic()