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org.apache.hadoop.hive.ql.plan.PartitionDesc 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 org.apache.hadoop.hive.ql.plan;
import com.google.common.collect.Interner;
import com.google.common.collect.Interners;
import java.io.Serializable;
import java.util.Enumeration;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.metastore.api.hive_metastoreConstants;
import org.apache.hadoop.hive.ql.exec.Utilities;
import org.apache.hadoop.hive.ql.io.HiveFileFormatUtils;
import org.apache.hadoop.hive.ql.io.HiveOutputFormat;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.metadata.Partition;
import org.apache.hadoop.hive.serde.serdeConstants;
import org.apache.hadoop.hive.serde2.Deserializer;
import org.apache.hadoop.hive.serde2.SerDeUtils;
import org.apache.hadoop.mapred.InputFormat;
import org.apache.hadoop.mapred.OutputFormat;
import org.apache.hive.common.util.ReflectionUtil;
import org.apache.hive.common.util.HiveStringUtils;
import org.apache.hadoop.hive.ql.plan.Explain.Level;
/**
* PartitionDesc.
*
*/
@Explain(displayName = "Partition", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
public class PartitionDesc implements Serializable, Cloneable {
static {
STRING_INTERNER = Interners.newWeakInterner();
CLASS_INTERNER = Interners.newWeakInterner();
}
private static final Interner STRING_INTERNER;
private static final Interner> CLASS_INTERNER;
private TableDesc tableDesc;
private LinkedHashMap partSpec;
private Class inputFileFormatClass;
private Class outputFileFormatClass;
private Properties properties;
private String baseFileName;
public void setBaseFileName(String baseFileName) {
this.baseFileName = baseFileName;
}
public PartitionDesc() {
}
public PartitionDesc(final TableDesc table, final LinkedHashMap partSpec) {
this.tableDesc = table;
this.partSpec = partSpec;
}
public PartitionDesc(final Partition part) throws HiveException {
this.tableDesc = Utilities.getTableDesc(part.getTable());
setProperties(part.getMetadataFromPartitionSchema());
partSpec = part.getSpec();
setInputFileFormatClass(part.getInputFormatClass());
setOutputFileFormatClass(part.getOutputFormatClass());
}
public PartitionDesc(final Partition part,final TableDesc tblDesc) throws HiveException {
this.tableDesc = tblDesc;
setProperties(part.getSchemaFromTableSchema(tblDesc.getProperties())); // each partition maintains a large properties
partSpec = part.getSpec();
setOutputFileFormatClass(part.getInputFormatClass());
setOutputFileFormatClass(part.getOutputFormatClass());
}
@Explain(displayName = "", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
public TableDesc getTableDesc() {
return tableDesc;
}
public void setTableDesc(TableDesc tableDesc) {
this.tableDesc = tableDesc;
}
@Explain(displayName = "partition values", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
public LinkedHashMap getPartSpec() {
return partSpec;
}
public void setPartSpec(final LinkedHashMap partSpec) {
this.partSpec = partSpec;
}
public Class getInputFileFormatClass() {
if (inputFileFormatClass == null && tableDesc != null) {
setInputFileFormatClass(tableDesc.getInputFileFormatClass());
}
return inputFileFormatClass;
}
public String getDeserializerClassName() {
Properties schema = getProperties();
String clazzName = schema.getProperty(serdeConstants.SERIALIZATION_LIB);
if (clazzName == null) {
throw new IllegalStateException("Property " + serdeConstants.SERIALIZATION_LIB +
" cannot be null");
}
return clazzName;
}
/**
* Return a deserializer object corresponding to the partitionDesc.
*/
public Deserializer getDeserializer(Configuration conf) throws Exception {
Properties schema = getProperties();
String clazzName = getDeserializerClassName();
Deserializer deserializer = ReflectionUtil.newInstance(conf.getClassByName(clazzName)
.asSubclass(Deserializer.class), conf);
SerDeUtils.initializeSerDe(deserializer, conf, getTableDesc().getProperties(), schema);
return deserializer;
}
public void setInputFileFormatClass(
final Class inputFileFormatClass) {
if (inputFileFormatClass == null) {
this.inputFileFormatClass = null;
} else {
this.inputFileFormatClass = (Class) CLASS_INTERNER.intern(inputFileFormatClass);
}
}
public Class getOutputFileFormatClass() {
if (outputFileFormatClass == null && tableDesc != null) {
setOutputFileFormatClass(tableDesc.getOutputFileFormatClass());
}
return outputFileFormatClass;
}
public void setOutputFileFormatClass(final Class outputFileFormatClass) {
Class outputClass = outputFileFormatClass == null ? null :
HiveFileFormatUtils.getOutputFormatSubstitute(outputFileFormatClass);
if (outputClass != null) {
this.outputFileFormatClass = (Class)
CLASS_INTERNER.intern(outputClass);
} else {
this.outputFileFormatClass = outputClass;
}
}
public Properties getProperties() {
if (properties == null && tableDesc != null) {
return tableDesc.getProperties();
}
return properties;
}
@Explain(displayName = "properties", explainLevels = { Level.EXTENDED })
public Map getPropertiesExplain() {
return HiveStringUtils.getPropertiesExplain(getProperties());
}
public void setProperties(final Properties properties) {
this.properties = properties;
for (Enumeration keys = properties.propertyNames(); keys.hasMoreElements();) {
String key = (String) keys.nextElement();
String oldValue = properties.getProperty(key);
if (oldValue != null) {
String value = STRING_INTERNER.intern(oldValue);
properties.setProperty(key, value);
}
}
}
/**
* @return the serdeClassName
*/
@Explain(displayName = "serde", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
public String getSerdeClassName() {
return getProperties().getProperty(serdeConstants.SERIALIZATION_LIB);
}
@Explain(displayName = "name", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
public String getTableName() {
return getProperties().getProperty(hive_metastoreConstants.META_TABLE_NAME);
}
@Explain(displayName = "input format", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
public String getInputFileFormatClassName() {
return getInputFileFormatClass().getName();
}
@Explain(displayName = "output format", explainLevels = { Level.USER, Level.DEFAULT, Level.EXTENDED })
public String getOutputFileFormatClassName() {
return getOutputFileFormatClass().getName();
}
@Explain(displayName = "base file name", explainLevels = { Level.EXTENDED })
public String getBaseFileName() {
return baseFileName;
}
public boolean isPartitioned() {
return partSpec != null && !partSpec.isEmpty();
}
@Override
public PartitionDesc clone() {
PartitionDesc ret = new PartitionDesc();
ret.inputFileFormatClass = inputFileFormatClass;
ret.outputFileFormatClass = outputFileFormatClass;
if (properties != null) {
Properties newProp = new Properties();
Enumeration keysProp = properties.keys();
while (keysProp.hasMoreElements()) {
Object key = keysProp.nextElement();
newProp.put(key, properties.get(key));
}
ret.setProperties(newProp);
}
ret.tableDesc = (TableDesc) tableDesc.clone();
// The partition spec is not present
if (partSpec != null) {
ret.partSpec = new java.util.LinkedHashMap();
ret.partSpec.putAll(partSpec);
}
return ret;
}
/**
* Attempt to derive a virtual base file name property from the
* path. If path format is unrecognized, just use the full path.
*
* @param path
* URI to the partition file
*/
public void deriveBaseFileName(String path) {
PlanUtils.configureInputJobPropertiesForStorageHandler(tableDesc);
if (path == null) {
return;
}
try {
Path p = new Path(path);
baseFileName = p.getName();
} catch (Exception ex) {
// don't really care about the exception. the goal is to capture the
// the last component at the minimum - so set to the complete path
baseFileName = path;
}
}
public void intern(Interner interner) {
this.tableDesc = interner.intern(tableDesc);
}
}
