private void applyConstraints(URI fromURI, URI toURI, Tree ast, boolean isLocal)
throws SemanticException {
// 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 {
FileStatus[] srcs =
matchFilesOrDir(
FileSystem.get(fromURI, conf),
new Path(fromURI.getScheme(), fromURI.getAuthority(), fromURI.getPath()));
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);
}
// only in 'local' mode do we copy stuff from one place to another.
// reject different scheme/authority in other cases.
if (!isLocal
&& (!StringUtils.equals(fromURI.getScheme(), toURI.getScheme())
|| !StringUtils.equals(fromURI.getAuthority(), toURI.getAuthority()))) {
String reason =
"Move from: "
+ fromURI.toString()
+ " to: "
+ toURI.toString()
+ " is not valid. "
+ "Please check that values for params \"default.fs.name\" and "
+ "\"hive.metastore.warehouse.dir\" do not conflict.";
throw new SemanticException(ErrorMsg.ILLEGAL_PATH.getMsg(ast, reason));
}
}
@Override
public void analyzeInternal(ASTNode ast) throws SemanticException {
isLocal = false;
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);
} 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.isOffline()) {
throw new SemanticException(
ErrorMsg.OFFLINE_TABLE_OR_PARTITION.getMsg(":Table " + ts.tableName));
}
if (ts.tableHandle.isView()) {
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());
}
URI toURI =
(ts.partHandle != null)
? ts.partHandle.getDataLocation()
: ts.tableHandle.getDataLocation();
List<FieldSchema> 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());
}
// make sure the arguments make sense
applyConstraints(fromURI, toURI, fromTree, isLocal);
Task<? extends Serializable> rTask = null;
// create copy work
if (isLocal) {
// if the local keyword is specified - we will always make a copy. this
// might seem redundant in the case
// that the hive warehouse is also located in the local file system - but
// that's just a test case.
String copyURIStr = ctx.getExternalTmpFileURI(toURI);
URI copyURI = URI.create(copyURIStr);
rTask = TaskFactory.get(new CopyWork(fromURI.toString(), copyURIStr), conf);
fromURI = copyURI;
}
// create final load/move work
String loadTmpPath = ctx.getExternalTmpFileURI(toURI);
Map<String, String> partSpec = ts.getPartSpec();
if (partSpec == null) {
partSpec = new LinkedHashMap<String, String>();
outputs.add(new WriteEntity(ts.tableHandle));
} else {
try {
Partition part = Hive.get().getPartition(ts.tableHandle, partSpec, false);
if (part != null) {
if (part.isOffline()) {
throw new SemanticException(
ErrorMsg.OFFLINE_TABLE_OR_PARTITION.getMsg(ts.tableName + ":" + part.getName()));
}
outputs.add(new WriteEntity(part));
} else {
outputs.add(new WriteEntity(ts.tableHandle));
}
} catch (HiveException e) {
throw new SemanticException(e);
}
}
LoadTableDesc loadTableWork =
new LoadTableDesc(
fromURI.toString(),
loadTmpPath,
Utilities.getTableDesc(ts.tableHandle),
partSpec,
isOverWrite);
Task<? extends Serializable> childTask =
TaskFactory.get(new MoveWork(getInputs(), getOutputs(), loadTableWork, null, true), 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<? extends Serializable> 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<Task<? extends Serializable>> indexUpdateTasks = indexUpdater.generateUpdateTasks();
for (Task<? extends Serializable> 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);
}
}