jp.co.yahoo.yosegi.hive.pushdown.InHiveExpr Maven / Gradle / Ivy
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package jp.co.yahoo.yosegi.hive.pushdown;
import jp.co.yahoo.yosegi.spread.column.filter.IFilter;
import jp.co.yahoo.yosegi.spread.column.filter.StringDictionaryFilter;
import jp.co.yahoo.yosegi.spread.expression.ExecuterNode;
import jp.co.yahoo.yosegi.spread.expression.IExpressionNode;
import jp.co.yahoo.yosegi.spread.expression.IExtractNode;
import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableConstantBooleanObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableConstantByteObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableConstantDoubleObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableConstantFloatObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableConstantIntObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableConstantLongObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableConstantShortObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableConstantStringObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableVoidObjectInspector;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
public class InHiveExpr implements IHiveExprNode {
private final List nodeDescList;
public InHiveExpr( final List nodeDescList ) {
this.nodeDescList = nodeDescList;
}
/**
* Initialize by setting Hive filter condition.
*/
public static PrimitiveObjectInspector getPrimitiveObjectInspector(
final ExprNodeDesc exprNode ) {
if ( ! ( exprNode instanceof ExprNodeConstantDesc ) ) {
return null;
}
ExprNodeConstantDesc constDesc = (ExprNodeConstantDesc)exprNode;
ObjectInspector objectInspector = constDesc.getWritableObjectInspector();
if ( objectInspector.getCategory() != ObjectInspector.Category.PRIMITIVE ) {
return null;
}
return (PrimitiveObjectInspector)objectInspector;
}
/**
* Convert to Yosegi's filter condition.
*/
public static IFilter getEqualsExecuter(
final List nodeDescList , final int start ) {
PrimitiveObjectInspector rootPrimitiveObjectInspector =
getPrimitiveObjectInspector( nodeDescList.get( start ) );
if ( rootPrimitiveObjectInspector == null ) {
return null;
}
PrimitiveObjectInspector.PrimitiveCategory primitiveCategory =
rootPrimitiveObjectInspector.getPrimitiveCategory();
IFilter filter = null;
switch ( rootPrimitiveObjectInspector.getPrimitiveCategory() ) {
case STRING:
Set stringDic = new HashSet();
for ( int i = start ; i < nodeDescList.size() ; i++ ) {
PrimitiveObjectInspector primitiveObjectInspector =
getPrimitiveObjectInspector( nodeDescList.get( i ) );
if ( primitiveObjectInspector == null
|| primitiveObjectInspector.getPrimitiveCategory()
!= rootPrimitiveObjectInspector.getPrimitiveCategory() ) {
return null;
}
stringDic.add(
( (WritableConstantStringObjectInspector)primitiveObjectInspector )
.getWritableConstantValue().toString() );
}
return new StringDictionaryFilter( stringDic );
case BYTE:
case SHORT:
case INT:
case LONG:
case FLOAT:
case DOUBLE:
default:
return null;
}
}
@Override
public void addChildNode( final ExprNodeGenericFuncDesc exprNodeDesc ) {
throw new UnsupportedOperationException( "IHiveExprNode node can not have child node." );
}
@Override
public IExpressionNode getPushDownFilterNode() {
if ( nodeDescList.size() < 2 ) {
return null;
}
ExprNodeDesc columnDesc = nodeDescList.get( 0 );
IExtractNode extractNode = CreateExtractNodeUtil.getExtractNode( columnDesc );
if ( extractNode == null ) {
return null;
}
IFilter filter = getEqualsExecuter( nodeDescList , 1 );
if ( filter == null ) {
return null;
}
return new ExecuterNode( extractNode , filter );
}
}