Package org.apache.druid.segment.filter.cnf

Class HiveCnfHelper

java.lang.Object

org.apache.druid.segment.filter.cnf.HiveCnfHelper

public class HiveCnfHelper
extends Object

All functions in this class were basically adopted from Apache Hive and modified to use them in Druid. See https://github.com/apache/hive/blob/branch-2.0/storage-api/src/java/org/apache/hadoop/hive/ql/io/sarg/SearchArgumentImpl.java for original implementation.

Method Summary

Modifier and Type	Method	Description
static Filter	convertToCnf(Filter current)
static Filter	flatten(Filter root)
static Filter	pushDownNot(Filter current)

Methods inherited from class java.lang.Object

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

Method Details

pushDownNot

public static Filter pushDownNot(Filter current)

convertToCnf

public static Filter convertToCnf(Filter current)
                           throws CNFFilterExplosionException

Throws:

CNFFilterExplosionException

flatten

public static Filter flatten(Filter root)