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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.parse;
import org.apache.hadoop.hive.conf.HiveConf.StrictChecks;
import org.apache.hadoop.hive.conf.HiveConf.ConfVars;
import java.io.IOException;
import java.io.Serializable;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import org.antlr.runtime.tree.Tree;
import org.apache.commons.httpclient.util.URIUtil;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.metastore.TableType;
import org.apache.hadoop.hive.metastore.api.FieldSchema;
import org.apache.hadoop.hive.ql.ErrorMsg;
import org.apache.hadoop.hive.ql.QueryState;
import org.apache.hadoop.hive.ql.exec.Task;
import org.apache.hadoop.hive.ql.exec.TaskFactory;
import org.apache.hadoop.hive.ql.exec.Utilities;
import org.apache.hadoop.hive.ql.hooks.WriteEntity;
import org.apache.hadoop.hive.ql.io.HiveFileFormatUtils;
import org.apache.hadoop.hive.ql.metadata.Hive;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.metadata.Partition;
import org.apache.hadoop.hive.ql.plan.LoadTableDesc;
import org.apache.hadoop.hive.ql.plan.MoveWork;
import org.apache.hadoop.hive.ql.plan.StatsWork;
import org.apache.hadoop.mapred.InputFormat;
import com.google.common.collect.Lists;
/**
* LoadSemanticAnalyzer.
*
*/
public class LoadSemanticAnalyzer extends BaseSemanticAnalyzer {
public LoadSemanticAnalyzer(QueryState queryState) throws SemanticException {
super(queryState);
}
public static FileStatus[] matchFilesOrDir(FileSystem fs, Path path)
throws IOException {
FileStatus[] srcs = fs.globStatus(path, new PathFilter() {
@Override
public boolean accept(Path p) {
String name = p.getName();
return name.equals(EximUtil.METADATA_NAME) ? true : !name.startsWith("_") && !name.startsWith(".");
}
});
if ((srcs != null) && srcs.length == 1) {
if (srcs[0].isDir()) {
srcs = fs.listStatus(srcs[0].getPath(), new PathFilter() {
@Override
public boolean accept(Path p) {
String name = p.getName();
return !name.startsWith("_") && !name.startsWith(".");
}
});
}
}
return (srcs);
}
private URI initializeFromURI(String fromPath, boolean isLocal) throws IOException,
URISyntaxException {
URI fromURI = new Path(fromPath).toUri();
String fromScheme = fromURI.getScheme();
String fromAuthority = fromURI.getAuthority();
String path = fromURI.getPath();
// generate absolute path relative to current directory or hdfs home
// directory
if (!path.startsWith("/")) {
if (isLocal) {
path = URIUtil.decode(
new Path(System.getProperty("user.dir"), fromPath).toUri().toString());
} else {
path = new Path(new Path("/user/" + System.getProperty("user.name")),
path).toString();
}
}
// set correct scheme and authority
if (StringUtils.isEmpty(fromScheme)) {
if (isLocal) {
// file for local
fromScheme = "file";
} else {
// use default values from fs.default.name
URI defaultURI = FileSystem.get(conf).getUri();
fromScheme = defaultURI.getScheme();
fromAuthority = defaultURI.getAuthority();
}
}
// if scheme is specified but not authority then use the default authority
if ((!fromScheme.equals("file")) && StringUtils.isEmpty(fromAuthority)) {
URI defaultURI = FileSystem.get(conf).getUri();
fromAuthority = defaultURI.getAuthority();
}
LOG.debug(fromScheme + "@" + fromAuthority + "@" + path);
return new URI(fromScheme, fromAuthority, path, null, null);
}
private List applyConstraintsAndGetFiles(URI fromURI, Tree ast,
boolean isLocal) throws SemanticException {
FileStatus[] srcs = null;
// local mode implies that scheme should be "file"
// we can change this going forward
if (isLocal && !fromURI.getScheme().equals("file")) {
throw new SemanticException(ErrorMsg.ILLEGAL_PATH.getMsg(ast,
"Source file system should be \"file\" if \"local\" is specified"));
}
try {
srcs = matchFilesOrDir(FileSystem.get(fromURI, conf), new Path(fromURI));
if (srcs == null || srcs.length == 0) {
throw new SemanticException(ErrorMsg.INVALID_PATH.getMsg(ast,
"No files matching path " + fromURI));
}
for (FileStatus oneSrc : srcs) {
if (oneSrc.isDir()) {
throw new SemanticException(ErrorMsg.INVALID_PATH.getMsg(ast,
"source contains directory: " + oneSrc.getPath().toString()));
}
}
} catch (IOException e) {
// Has to use full name to make sure it does not conflict with
// org.apache.commons.lang.StringUtils
throw new SemanticException(ErrorMsg.INVALID_PATH.getMsg(ast), e);
}
return Lists.newArrayList(srcs);
}
@Override
public void analyzeInternal(ASTNode ast) throws SemanticException {
boolean isLocal = false;
boolean isOverWrite = false;
Tree fromTree = ast.getChild(0);
Tree tableTree = ast.getChild(1);
if (ast.getChildCount() == 4) {
isLocal = true;
isOverWrite = true;
}
if (ast.getChildCount() == 3) {
if (ast.getChild(2).getText().toLowerCase().equals("local")) {
isLocal = true;
} else {
isOverWrite = true;
}
}
// initialize load path
URI fromURI;
try {
String fromPath = stripQuotes(fromTree.getText());
fromURI = initializeFromURI(fromPath, isLocal);
} catch (IOException e) {
throw new SemanticException(ErrorMsg.INVALID_PATH.getMsg(fromTree, e
.getMessage()), e);
} catch (URISyntaxException e) {
throw new SemanticException(ErrorMsg.INVALID_PATH.getMsg(fromTree, e
.getMessage()), e);
}
// initialize destination table/partition
TableSpec ts = new TableSpec(db, conf, (ASTNode) tableTree);
if (ts.tableHandle.isView() || ts.tableHandle.isMaterializedView()) {
throw new SemanticException(ErrorMsg.DML_AGAINST_VIEW.getMsg());
}
if (ts.tableHandle.isNonNative()) {
throw new SemanticException(ErrorMsg.LOAD_INTO_NON_NATIVE.getMsg());
}
if(ts.tableHandle.isStoredAsSubDirectories()) {
throw new SemanticException(ErrorMsg.LOAD_INTO_STORED_AS_DIR.getMsg());
}
List parts = ts.tableHandle.getPartitionKeys();
if ((parts != null && parts.size() > 0)
&& (ts.partSpec == null || ts.partSpec.size() == 0)) {
throw new SemanticException(ErrorMsg.NEED_PARTITION_ERROR.getMsg());
}
List bucketCols = ts.tableHandle.getBucketCols();
if (bucketCols != null && !bucketCols.isEmpty()) {
String error = StrictChecks.checkBucketing(conf);
if (error != null) throw new SemanticException("Please load into an intermediate table"
+ " and use 'insert... select' to allow Hive to enforce bucketing. " + error);
}
// make sure the arguments make sense
List files = applyConstraintsAndGetFiles(fromURI, fromTree, isLocal);
// for managed tables, make sure the file formats match
if (TableType.MANAGED_TABLE.equals(ts.tableHandle.getTableType())
&& conf.getBoolVar(HiveConf.ConfVars.HIVECHECKFILEFORMAT)) {
ensureFileFormatsMatch(ts, files, fromURI);
}
inputs.add(toReadEntity(new Path(fromURI)));
Task rTask = null;
// create final load/move work
boolean preservePartitionSpecs = false;
Map partSpec = ts.getPartSpec();
if (partSpec == null) {
partSpec = new LinkedHashMap();
outputs.add(new WriteEntity(ts.tableHandle,
(isOverWrite ? WriteEntity.WriteType.INSERT_OVERWRITE :
WriteEntity.WriteType.INSERT)));
} else {
try{
Partition part = Hive.get().getPartition(ts.tableHandle, partSpec, false);
if (part != null) {
if (isOverWrite){
outputs.add(new WriteEntity(part, WriteEntity.WriteType.INSERT_OVERWRITE));
} else {
outputs.add(new WriteEntity(part, WriteEntity.WriteType.INSERT));
// If partition already exists and we aren't overwriting it, then respect
// its current location info rather than picking it from the parent TableDesc
preservePartitionSpecs = true;
}
} else {
outputs.add(new WriteEntity(ts.tableHandle,
(isOverWrite ? WriteEntity.WriteType.INSERT_OVERWRITE :
WriteEntity.WriteType.INSERT)));
}
} catch(HiveException e) {
throw new SemanticException(e);
}
}
LoadTableDesc loadTableWork;
loadTableWork = new LoadTableDesc(new Path(fromURI),
Utilities.getTableDesc(ts.tableHandle), partSpec, isOverWrite);
if (preservePartitionSpecs){
// Note : preservePartitionSpecs=true implies inheritTableSpecs=false but
// but preservePartitionSpecs=false(default) here is not sufficient enough
// info to set inheritTableSpecs=true
loadTableWork.setInheritTableSpecs(false);
}
Task childTask = TaskFactory.get(new MoveWork(getInputs(),
getOutputs(), loadTableWork, null, true, isLocal), conf);
if (rTask != null) {
rTask.addDependentTask(childTask);
} else {
rTask = childTask;
}
rootTasks.add(rTask);
// The user asked for stats to be collected.
// Some stats like number of rows require a scan of the data
// However, some other stats, like number of files, do not require a complete scan
// Update the stats which do not require a complete scan.
Task statTask = null;
if (conf.getBoolVar(HiveConf.ConfVars.HIVESTATSAUTOGATHER)) {
StatsWork statDesc = new StatsWork(loadTableWork);
statDesc.setNoStatsAggregator(true);
statDesc.setClearAggregatorStats(true);
statDesc.setStatsReliable(conf.getBoolVar(HiveConf.ConfVars.HIVE_STATS_RELIABLE));
statTask = TaskFactory.get(statDesc, conf);
}
// HIVE-3334 has been filed for load file with index auto update
if (HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVEINDEXAUTOUPDATE)) {
IndexUpdater indexUpdater = new IndexUpdater(loadTableWork, getInputs(), conf);
try {
List> indexUpdateTasks = indexUpdater.generateUpdateTasks();
for (Task updateTask : indexUpdateTasks) {
//LOAD DATA will either have a copy & move or just a move,
// we always want the update to be dependent on the move
childTask.addDependentTask(updateTask);
if (statTask != null) {
updateTask.addDependentTask(statTask);
}
}
} catch (HiveException e) {
console.printInfo("WARNING: could not auto-update stale indexes, indexes are not out of sync");
}
}
else if (statTask != null) {
childTask.addDependentTask(statTask);
}
}
private void ensureFileFormatsMatch(TableSpec ts, List fileStatuses,
final URI fromURI)
throws SemanticException {
final Class destInputFormat;
try {
if (ts.getPartSpec() == null || ts.getPartSpec().isEmpty()) {
destInputFormat = ts.tableHandle.getInputFormatClass();
} else {
destInputFormat = ts.partHandle.getInputFormatClass();
}
} catch (HiveException e) {
throw new SemanticException(e);
}
try {
FileSystem fs = FileSystem.get(fromURI, conf);
boolean validFormat = HiveFileFormatUtils.checkInputFormat(fs, conf, destInputFormat,
fileStatuses);
if (!validFormat) {
throw new SemanticException(ErrorMsg.INVALID_FILE_FORMAT_IN_LOAD.getMsg());
}
} catch (Exception e) {
throw new SemanticException("Unable to load data to destination table." +
" Error: " + e.getMessage());
}
}
}
