org.apache.hadoop.hive.ql.optimizer.ppr.PartitionExpressionForMetastore Maven / Gradle / Ivy
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* 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 org.apache.hadoop.hive.ql.optimizer.ppr;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hive.metastore.PartitionExpressionProxy;
import org.apache.hadoop.hive.metastore.api.MetaException;
import org.apache.hadoop.hive.ql.exec.Utilities;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
import org.apache.hadoop.hive.serde2.typeinfo.PrimitiveTypeInfo;
/**
* The basic implementation of PartitionExpressionProxy that uses ql package classes.
*/
public class PartitionExpressionForMetastore implements PartitionExpressionProxy {
private static final Log LOG = LogFactory.getLog(PartitionExpressionForMetastore.class);
@Override
public String convertExprToFilter(byte[] exprBytes) throws MetaException {
return deserializeExpr(exprBytes).getExprString();
}
@Override
public boolean filterPartitionsByExpr(List partColumnNames,
List partColumnTypeInfos, byte[] exprBytes,
String defaultPartitionName, List partitionNames) throws MetaException {
ExprNodeGenericFuncDesc expr = deserializeExpr(exprBytes);
try {
long startTime = System.nanoTime(), len = partitionNames.size();
boolean result = PartitionPruner.prunePartitionNames(
partColumnNames, partColumnTypeInfos, expr, defaultPartitionName, partitionNames);
double timeMs = (System.nanoTime() - startTime) / 1000000.0;
LOG.debug("Pruning " + len + " partition names took " + timeMs + "ms");
return result;
} catch (HiveException ex) {
LOG.error("Failed to apply the expression", ex);
throw new MetaException(ex.getMessage());
}
}
private ExprNodeGenericFuncDesc deserializeExpr(byte[] exprBytes) throws MetaException {
ExprNodeGenericFuncDesc expr = null;
try {
expr = Utilities.deserializeExpressionFromKryo(exprBytes);
} catch (Exception ex) {
LOG.error("Failed to deserialize the expression", ex);
throw new MetaException(ex.getMessage());
}
if (expr == null) {
throw new MetaException("Failed to deserialize expression - ExprNodeDesc not present");
}
return expr;
}
}