static void initializeDeserializer(
Deserializer deserializer, Configuration conf, HCatTableInfo info, HCatSchema schema)
throws SerDeException {
Properties props = getSerdeProperties(info, schema);
LOG.info("Initializing " + deserializer.getClass().getName() + " with properties " + props);
deserializer.initialize(conf, props);
}
@SuppressWarnings("deprecation")
private static void initializeDeserializer(Deserializer deserializer, Properties schema) {
try {
deserializer.initialize(new Configuration(false), schema);
} catch (SerDeException e) {
throw new RuntimeException(
"error initializing deserializer: " + deserializer.getClass().getName());
}
}
/*
* This is the same as the setChildren method below but for empty tables.
* It takes care of the following:
* 1. Create the right object inspector.
* 2. Set up the childrenOpToOI with the object inspector.
* So as to ensure that the initialization happens correctly.
*/
public void initEmptyInputChildren(List<Operator<?>> children, Configuration hconf)
throws SerDeException, Exception {
setChildOperators(children);
for (Operator<?> child : children) {
TableScanOperator tsOp = (TableScanOperator) child;
StructObjectInspector soi = null;
PartitionDesc partDesc = conf.getAliasToPartnInfo().get(tsOp.getConf().getAlias());
Deserializer serde = partDesc.getTableDesc().getDeserializer();
partDesc.setProperties(partDesc.getProperties());
MapOpCtx opCtx = new MapOpCtx(tsOp.getConf().getAlias(), child, partDesc);
StructObjectInspector tableRowOI = (StructObjectInspector) serde.getObjectInspector();
initObjectInspector(hconf, opCtx, tableRowOI);
soi = opCtx.rowObjectInspector;
child.getParentOperators().add(this);
childrenOpToOI.put(child, soi);
}
}
public static StructObjectInspector getTableObjectInspector(
@SuppressWarnings("deprecation") Deserializer deserializer) {
try {
ObjectInspector inspector = deserializer.getObjectInspector();
checkArgument(
inspector.getCategory() == Category.STRUCT,
"expected STRUCT: %s",
inspector.getCategory());
return (StructObjectInspector) inspector;
} catch (SerDeException e) {
throw Throwables.propagate(e);
}
}
private Object readRow(Writable value, ExecMapperContext context) throws SerDeException {
Object deserialized = deserializer.deserialize(value);
Object row = partTblObjectInspectorConverter.convert(deserialized);
if (hasVC()) {
rowWithPartAndVC[0] = row;
if (context != null) {
populateVirtualColumnValues(context, vcs, vcValues, deserializer);
}
int vcPos = isPartitioned() ? 2 : 1;
rowWithPartAndVC[vcPos] = vcValues;
return rowWithPartAndVC;
} else if (isPartitioned()) {
rowWithPart[0] = row;
return rowWithPart;
}
return row;
}
@Override
public boolean advanceNextPosition() {
try {
if (closed || !recordReader.next(key, value)) {
close();
return false;
}
// reset loaded flags
// partition keys are already loaded, but everything else is not
System.arraycopy(isPartitionColumn, 0, loaded, 0, isPartitionColumn.length);
// decode value
rowData = deserializer.deserialize(value);
return true;
} catch (IOException | SerDeException | RuntimeException e) {
closeWithSuppression(e);
throw new PrestoException(HIVE_CURSOR_ERROR.toErrorCode(), e);
}
}
/**
* Traverse all the partitions for a table, and get the OI for the table. Note that a conversion
* is required if any of the partition OI is different from the table OI. For eg. if the query
* references table T (partitions P1, P2), and P1's schema is same as T, whereas P2's scheme is
* different from T, conversion might be needed for both P1 and P2, since SettableOI might be
* needed for T
*/
private Map<TableDesc, StructObjectInspector> getConvertedOI(Configuration hconf)
throws HiveException {
Map<TableDesc, StructObjectInspector> tableDescOI =
new HashMap<TableDesc, StructObjectInspector>();
Set<TableDesc> identityConverterTableDesc = new HashSet<TableDesc>();
try {
Map<ObjectInspector, Boolean> oiSettableProperties = new HashMap<ObjectInspector, Boolean>();
for (String onefile : conf.getPathToAliases().keySet()) {
PartitionDesc pd = conf.getPathToPartitionInfo().get(onefile);
TableDesc tableDesc = pd.getTableDesc();
Deserializer partDeserializer = pd.getDeserializer(hconf);
StructObjectInspector partRawRowObjectInspector;
if (Utilities.isInputFileFormatSelfDescribing(pd)) {
Deserializer tblDeserializer = tableDesc.getDeserializer(hconf);
partRawRowObjectInspector = (StructObjectInspector) tblDeserializer.getObjectInspector();
} else {
partRawRowObjectInspector = (StructObjectInspector) partDeserializer.getObjectInspector();
}
StructObjectInspector tblRawRowObjectInspector = tableDescOI.get(tableDesc);
if ((tblRawRowObjectInspector == null)
|| (identityConverterTableDesc.contains(tableDesc))) {
Deserializer tblDeserializer = tableDesc.getDeserializer(hconf);
tblRawRowObjectInspector =
(StructObjectInspector)
ObjectInspectorConverters.getConvertedOI(
partRawRowObjectInspector,
tblDeserializer.getObjectInspector(),
oiSettableProperties);
if (identityConverterTableDesc.contains(tableDesc)) {
if (!partRawRowObjectInspector.equals(tblRawRowObjectInspector)) {
identityConverterTableDesc.remove(tableDesc);
}
} else if (partRawRowObjectInspector.equals(tblRawRowObjectInspector)) {
identityConverterTableDesc.add(tableDesc);
}
tableDescOI.put(tableDesc, tblRawRowObjectInspector);
}
}
} catch (Exception e) {
throw new HiveException(e);
}
return tableDescOI;
}
@Override
public <E> void processRow(Object key, Iterator<E> values) throws IOException {
if (reducer.getDone()) {
return;
}
try {
BytesWritable keyWritable = (BytesWritable) key;
byte tag = 0;
if (isTagged) {
// remove the tag from key coming out of reducer
// and store it in separate variable.
int size = keyWritable.getSize() - 1;
tag = keyWritable.get()[size];
keyWritable.setSize(size);
}
if (!keyWritable.equals(groupKey)) {
// If a operator wants to do some work at the beginning of a group
if (groupKey == null) { // the first group
groupKey = new BytesWritable();
} else {
// If a operator wants to do some work at the end of a group
LOG.trace("End Group");
reducer.endGroup();
}
try {
keyObject = inputKeyDeserializer.deserialize(keyWritable);
} catch (Exception e) {
throw new HiveException(
"Hive Runtime Error: Unable to deserialize reduce input key from "
+ Utilities.formatBinaryString(keyWritable.get(), 0, keyWritable.getSize())
+ " with properties "
+ keyTableDesc.getProperties(),
e);
}
groupKey.set(keyWritable.get(), 0, keyWritable.getSize());
LOG.trace("Start Group");
reducer.setGroupKeyObject(keyObject);
reducer.startGroup();
}
/* this.keyObject passed via reference */
if (vectorized) {
processVectors(values, tag);
} else {
processKeyValues(values, tag);
}
} catch (Throwable e) {
abort = true;
Utilities.setReduceWork(jc, null);
if (e instanceof OutOfMemoryError) {
// Don't create a new object if we are already out of memory
throw (OutOfMemoryError) e;
} else {
String msg = "Fatal error: " + e;
LOG.fatal(msg, e);
throw new RuntimeException(e);
}
}
}
@Override
@SuppressWarnings("unchecked")
public void init(JobConf job, OutputCollector output, Reporter reporter) throws Exception {
perfLogger.PerfLogBegin(CLASS_NAME, PerfLogger.SPARK_INIT_OPERATORS);
super.init(job, output, reporter);
rowObjectInspector = new ObjectInspector[Byte.MAX_VALUE];
ObjectInspector[] valueObjectInspector = new ObjectInspector[Byte.MAX_VALUE];
ObjectInspector keyObjectInspector;
ReduceWork gWork = Utilities.getReduceWork(job);
reducer = gWork.getReducer();
vectorized = gWork.getVectorMode();
reducer.setParentOperators(null); // clear out any parents as reducer is the
// root
isTagged = gWork.getNeedsTagging();
try {
keyTableDesc = gWork.getKeyDesc();
inputKeyDeserializer = ReflectionUtils.newInstance(keyTableDesc.getDeserializerClass(), null);
SerDeUtils.initializeSerDe(inputKeyDeserializer, null, keyTableDesc.getProperties(), null);
keyObjectInspector = inputKeyDeserializer.getObjectInspector();
valueTableDesc = new TableDesc[gWork.getTagToValueDesc().size()];
if (vectorized) {
final int maxTags = gWork.getTagToValueDesc().size();
keyStructInspector = (StructObjectInspector) keyObjectInspector;
batches = new VectorizedRowBatch[maxTags];
valueStructInspectors = new StructObjectInspector[maxTags];
valueStringWriters = new List[maxTags];
keysColumnOffset = keyStructInspector.getAllStructFieldRefs().size();
buffer = new DataOutputBuffer();
}
for (int tag = 0; tag < gWork.getTagToValueDesc().size(); tag++) {
// We should initialize the SerDe with the TypeInfo when available.
valueTableDesc[tag] = gWork.getTagToValueDesc().get(tag);
inputValueDeserializer[tag] =
ReflectionUtils.newInstance(valueTableDesc[tag].getDeserializerClass(), null);
SerDeUtils.initializeSerDe(
inputValueDeserializer[tag], null, valueTableDesc[tag].getProperties(), null);
valueObjectInspector[tag] = inputValueDeserializer[tag].getObjectInspector();
ArrayList<ObjectInspector> ois = new ArrayList<ObjectInspector>();
if (vectorized) {
/* vectorization only works with struct object inspectors */
valueStructInspectors[tag] = (StructObjectInspector) valueObjectInspector[tag];
ObjectPair<VectorizedRowBatch, StandardStructObjectInspector> pair =
VectorizedBatchUtil.constructVectorizedRowBatch(
keyStructInspector,
valueStructInspectors[tag],
gWork.getVectorScratchColumnTypeMap());
batches[tag] = pair.getFirst();
final int totalColumns =
keysColumnOffset + valueStructInspectors[tag].getAllStructFieldRefs().size();
valueStringWriters[tag] = new ArrayList<VectorExpressionWriter>(totalColumns);
valueStringWriters[tag].addAll(
Arrays.asList(
VectorExpressionWriterFactory.genVectorStructExpressionWritables(
keyStructInspector)));
valueStringWriters[tag].addAll(
Arrays.asList(
VectorExpressionWriterFactory.genVectorStructExpressionWritables(
valueStructInspectors[tag])));
rowObjectInspector[tag] = pair.getSecond();
} else {
ois.add(keyObjectInspector);
ois.add(valueObjectInspector[tag]);
// reducer.setGroupKeyObjectInspector(keyObjectInspector);
rowObjectInspector[tag] =
ObjectInspectorFactory.getStandardStructObjectInspector(
Utilities.reduceFieldNameList, ois);
}
}
} catch (Exception e) {
throw new RuntimeException(e);
}
ExecMapperContext execContext = new ExecMapperContext(job);
localWork = gWork.getMapRedLocalWork();
execContext.setJc(jc);
execContext.setLocalWork(localWork);
reducer.passExecContext(execContext);
reducer.setReporter(rp);
OperatorUtils.setChildrenCollector(
Arrays.<Operator<? extends OperatorDesc>>asList(reducer), output);
// initialize reduce operator tree
try {
LOG.info(reducer.dump(0));
reducer.initialize(jc, rowObjectInspector);
if (localWork != null) {
for (Operator<? extends OperatorDesc> dummyOp : localWork.getDummyParentOp()) {
dummyOp.setExecContext(execContext);
dummyOp.initialize(jc, null);
}
}
} catch (Throwable e) {
abort = true;
if (e instanceof OutOfMemoryError) {
// Don't create a new object if we are already out of memory
throw (OutOfMemoryError) e;
} else {
throw new RuntimeException("Reduce operator initialization failed", e);
}
}
perfLogger.PerfLogEnd(CLASS_NAME, PerfLogger.SPARK_INIT_OPERATORS);
}
public static Object[] populateVirtualColumnValues(
ExecMapperContext ctx,
List<VirtualColumn> vcs,
Object[] vcValues,
Deserializer deserializer) {
if (vcs == null) {
return vcValues;
}
if (vcValues == null) {
vcValues = new Object[vcs.size()];
}
for (int i = 0; i < vcs.size(); i++) {
VirtualColumn vc = vcs.get(i);
if (vc.equals(VirtualColumn.FILENAME)) {
if (ctx.inputFileChanged()) {
vcValues[i] = new Text(ctx.getCurrentInputPath().toString());
}
} else if (vc.equals(VirtualColumn.BLOCKOFFSET)) {
long current = ctx.getIoCxt().getCurrentBlockStart();
LongWritable old = (LongWritable) vcValues[i];
if (old == null) {
old = new LongWritable(current);
vcValues[i] = old;
continue;
}
if (current != old.get()) {
old.set(current);
}
} else if (vc.equals(VirtualColumn.ROWOFFSET)) {
long current = ctx.getIoCxt().getCurrentRow();
LongWritable old = (LongWritable) vcValues[i];
if (old == null) {
old = new LongWritable(current);
vcValues[i] = old;
continue;
}
if (current != old.get()) {
old.set(current);
}
} else if (vc.equals(VirtualColumn.RAWDATASIZE)) {
long current = 0L;
SerDeStats stats = deserializer.getSerDeStats();
if (stats != null) {
current = stats.getRawDataSize();
}
LongWritable old = (LongWritable) vcValues[i];
if (old == null) {
old = new LongWritable(current);
vcValues[i] = old;
continue;
}
if (current != old.get()) {
old.set(current);
}
} else if (vc.equals(VirtualColumn.ROWID)) {
if (ctx.getIoCxt().getRecordIdentifier() == null) {
vcValues[i] = null;
} else {
if (vcValues[i] == null) {
vcValues[i] = new Object[RecordIdentifier.Field.values().length];
}
RecordIdentifier.StructInfo.toArray(
ctx.getIoCxt().getRecordIdentifier(), (Object[]) vcValues[i]);
ctx.getIoCxt()
.setRecordIdentifier(null); // so we don't accidentally cache the value; shouldn't
// happen since IO layer either knows how to produce ROW__ID or not - but to be safe
}
}
}
return vcValues;
}
