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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.serde2.lazybinary;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.serde.serdeConstants;
import org.apache.hadoop.hive.serde2.ByteStream.RandomAccessOutput;
import org.apache.hadoop.hive.serde2.SerDeException;
import org.apache.hadoop.hive.serde2.SerDeSpec;
import org.apache.hadoop.hive.serde2.io.DateWritableV2;
import org.apache.hadoop.hive.serde2.io.HiveDecimalWritable;
import org.apache.hadoop.hive.serde2.io.HiveIntervalDayTimeWritable;
import org.apache.hadoop.hive.serde2.io.HiveIntervalYearMonthWritable;
import org.apache.hadoop.hive.serde2.io.TimestampWritableV2;
import org.apache.hadoop.hive.serde2.objectinspector.ListObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.MapObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.UnionObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector.Category;
import org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.StructField;
import org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.BinaryObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.BooleanObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.ByteObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.DateObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.DoubleObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.FloatObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.HiveCharObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.HiveDecimalObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.HiveIntervalDayTimeObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.HiveIntervalYearMonthObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.HiveVarcharObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.IntObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.LongObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.ShortObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.StringObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.TimestampObjectInspector;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
/**
* Subclass of LazyBinarySerDe with faster serialization, initializing a serializer based on the
* row columns rather than checking the ObjectInspector category/primitiveType for every value.
* This appears to be around 3x faster than the LazyBinarSerDe serialization.
*/
@SerDeSpec(schemaProps = {serdeConstants.LIST_COLUMNS, serdeConstants.LIST_COLUMN_TYPES})
public class LazyBinarySerDe2 extends LazyBinarySerDe {
LBSerializer rowSerializer;
public LazyBinarySerDe2() throws SerDeException {
super();
}
@Override
public void initialize(Configuration conf, Properties tbl) throws SerDeException {
super.initialize(conf, tbl);
ObjectInspector oi = getObjectInspector();
rowSerializer = createLBSerializer(oi);
}
@Override
public Writable serialize(Object obj, ObjectInspector objInspector) throws SerDeException {
if (objInspector.getCategory() != Category.STRUCT) {
throw new SerDeException(getClass().toString()
+ " can only serialize struct types, but we got: "
+ objInspector.getTypeName());
}
// serialize the row as BytesWritable
serializeByteStream.reset();
rowSerializer.serializeValue(serializeByteStream, obj, objInspector, true, nullMapKey);
serializeBytesWritable.set(serializeByteStream.getData(), 0, serializeByteStream.getLength());
// Stats bookkeeping
serializedSize = serializeByteStream.getLength();
lastOperationSerialize = true;
lastOperationDeserialize = false;
return serializeBytesWritable;
}
/**
* Generate a LBSerializer for the given primitive ObjectInspector
* @param poi
* @return
*/
LBSerializer createPrimitiveLBSerializer(PrimitiveObjectInspector poi) {
switch (poi.getPrimitiveCategory()) {
case VOID:
return new LBVoidSerializer();
case BOOLEAN:
return new LBBooleanSerializer();
case BYTE:
return new LBByteSerializer();
case SHORT:
return new LBShortSerializer();
case INT:
return new LBIntSerializer();
case LONG:
return new LBLongSerializer();
case FLOAT:
return new LBFloatSerializer();
case DOUBLE:
return new LBDoubleSerializer();
case STRING:
return new LBStringSerializer();
case CHAR:
return new LBHiveCharSerializer();
case VARCHAR:
return new LBHiveVarcharSerializer();
case BINARY:
return new LBBinarySerializer();
case DATE:
return new LBDateSerializer();
case TIMESTAMP:
return new LBTimestampSerializer();
case INTERVAL_YEAR_MONTH:
return new LBHiveIntervalYearMonthSerializer();
case INTERVAL_DAY_TIME:
return new LBHiveIntervalDayTimeSerializer();
case DECIMAL:
return new LBHiveDecimalSerializer();
default:
throw new IllegalArgumentException("Unsupported primitive category " + poi.getPrimitiveCategory());
}
}
/**
* Generate a LBSerializer for the given ObjectInspector
* @param oi
* @return
*/
LBSerializer createLBSerializer(ObjectInspector oi) {
switch (oi.getCategory()) {
case PRIMITIVE:
PrimitiveObjectInspector poi = (PrimitiveObjectInspector) oi;
return createPrimitiveLBSerializer(poi);
case LIST:
ListObjectInspector loi = (ListObjectInspector) oi;
ObjectInspector eoi = loi.getListElementObjectInspector();
return new LBListSerializer(createLBSerializer(eoi));
case MAP:
MapObjectInspector moi = (MapObjectInspector) oi;
ObjectInspector koi = moi.getMapKeyObjectInspector();
ObjectInspector voi = moi.getMapValueObjectInspector();
return new LBMapSerializer(createLBSerializer(koi), createLBSerializer(voi));
case STRUCT:
StructObjectInspector soi = (StructObjectInspector) oi;
List fields = soi.getAllStructFieldRefs();
LBSerializer[] fieldSerializers = new LBSerializer[fields.size()];
for (int idx = 0; idx < fieldSerializers.length; ++idx) {
fieldSerializers[idx] = createLBSerializer(fields.get(idx).getFieldObjectInspector());
}
return new LBStructSerializer(fieldSerializers);
case UNION:
UnionObjectInspector uoi = (UnionObjectInspector) oi;
List unionFields = uoi.getObjectInspectors();
LBSerializer[] unionFieldSerializers = new LBSerializer[unionFields.size()];
for (int idx = 0; idx < unionFieldSerializers.length; ++idx) {
unionFieldSerializers[idx] = createLBSerializer(unionFields.get(idx));
}
return new LBUnionSerializer(unionFieldSerializers);
default:
throw new IllegalArgumentException("Unsupported category " + oi.getCategory());
}
}
/**
* Abstract serializer class for serializing to LazyBinary format.
*/
abstract static class LBSerializer {
public void serializeValue(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
if (obj != null) {
serialize(byteStream, obj, objInspector, skipLengthPrefix, warnedOnceNullMapKey);
}
}
abstract void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey);
}
static class LBVoidSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
return;
}
}
static class LBBooleanSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
boolean v = ((BooleanObjectInspector) objInspector).get(obj);
byteStream.write((byte) (v ? 1 : 0));
}
}
static class LBByteSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
ByteObjectInspector boi = (ByteObjectInspector) objInspector;
byte v = boi.get(obj);
byteStream.write(v);
}
}
static class LBShortSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
ShortObjectInspector spoi = (ShortObjectInspector) objInspector;
short v = spoi.get(obj);
byteStream.write((byte) (v >> 8));
byteStream.write((byte) (v));
}
}
static class LBIntSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
IntObjectInspector ioi = (IntObjectInspector) objInspector;
int v = ioi.get(obj);
LazyBinaryUtils.writeVInt(byteStream, v);
}
}
static class LBLongSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
LongObjectInspector loi = (LongObjectInspector) objInspector;
long v = loi.get(obj);
LazyBinaryUtils.writeVLong(byteStream, v);
return;
}
}
static class LBFloatSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
FloatObjectInspector foi = (FloatObjectInspector) objInspector;
int v = Float.floatToIntBits(foi.get(obj));
byteStream.write((byte) (v >> 24));
byteStream.write((byte) (v >> 16));
byteStream.write((byte) (v >> 8));
byteStream.write((byte) (v));
}
}
static class LBDoubleSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
DoubleObjectInspector doi = (DoubleObjectInspector) objInspector;
LazyBinaryUtils.writeDouble(byteStream, doi.get(obj));
}
}
static class LBStringSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
StringObjectInspector soi = (StringObjectInspector) objInspector;
Text t = soi.getPrimitiveWritableObject(obj);
serializeText(byteStream, t, skipLengthPrefix);
}
}
static class LBHiveCharSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
HiveCharObjectInspector hcoi = (HiveCharObjectInspector) objInspector;
Text t = hcoi.getPrimitiveWritableObject(obj).getTextValue();
serializeText(byteStream, t, skipLengthPrefix);
}
}
static class LBHiveVarcharSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
HiveVarcharObjectInspector hcoi = (HiveVarcharObjectInspector) objInspector;
Text t = hcoi.getPrimitiveWritableObject(obj).getTextValue();
serializeText(byteStream, t, skipLengthPrefix);
}
}
static class LBBinarySerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
BinaryObjectInspector baoi = (BinaryObjectInspector) objInspector;
BytesWritable bw = baoi.getPrimitiveWritableObject(obj);
int length = bw.getLength();
if(!skipLengthPrefix){
LazyBinaryUtils.writeVInt(byteStream, length);
} else {
if (length == 0){
throw new RuntimeException("LazyBinaryColumnarSerde cannot serialize a non-null zero "
+ "length binary field. Consider using either LazyBinarySerde or ColumnarSerde.");
}
}
byteStream.write(bw.getBytes(),0,length);
}
}
static class LBDateSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
DateWritableV2 d = ((DateObjectInspector) objInspector).getPrimitiveWritableObject(obj);
LazyBinarySerDe.writeDateToByteStream(byteStream, d);
}
}
static class LBTimestampSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
TimestampObjectInspector toi = (TimestampObjectInspector) objInspector;
TimestampWritableV2 t = toi.getPrimitiveWritableObject(obj);
t.writeToByteStream(byteStream);
}
}
static class LBHiveIntervalYearMonthSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
HiveIntervalYearMonthWritable intervalYearMonth =
((HiveIntervalYearMonthObjectInspector) objInspector).getPrimitiveWritableObject(obj);
intervalYearMonth.writeToByteStream(byteStream);
}
}
static class LBHiveIntervalDayTimeSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
HiveIntervalDayTimeWritable intervalDayTime =
((HiveIntervalDayTimeObjectInspector) objInspector).getPrimitiveWritableObject(obj);
intervalDayTime.writeToByteStream(byteStream);
}
}
static class LBHiveDecimalSerializer extends LBSerializer {
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
HiveDecimalObjectInspector bdoi = (HiveDecimalObjectInspector) objInspector;
HiveDecimalWritable t = bdoi.getPrimitiveWritableObject(obj);
if (t == null) {
return;
}
writeToByteStream(byteStream, t);
}
}
static class LBListSerializer extends LBSerializer {
LBSerializer elementSerializer;
public LBListSerializer(LBSerializer elementSerializer) {
super();
this.elementSerializer = elementSerializer;
}
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
ListObjectInspector loi = (ListObjectInspector) objInspector;
ObjectInspector eoi = loi.getListElementObjectInspector();
int byteSizeStart = 0;
int listStart = 0;
if (!skipLengthPrefix) {
// 1/ reserve spaces for the byte size of the list
// which is a integer and takes four bytes
byteSizeStart = byteStream.getLength();
byteStream.reserve(4);
listStart = byteStream.getLength();
}
// 2/ write the size of the list as a VInt
int size = loi.getListLength(obj);
LazyBinaryUtils.writeVInt(byteStream, size);
// 3/ write the null bytes
byte nullByte = 0;
for (int eid = 0; eid < size; eid++) {
// set the bit to 1 if an element is not null
if (null != loi.getListElement(obj, eid)) {
nullByte |= 1 << (eid % 8);
}
// store the byte every eight elements or
// if this is the last element
if (7 == eid % 8 || eid == size - 1) {
byteStream.write(nullByte);
nullByte = 0;
}
}
// 4/ write element by element from the list
for (int eid = 0; eid < size; eid++) {
elementSerializer.serializeValue(
byteStream, loi.getListElement(obj, eid), eoi,
false, warnedOnceNullMapKey);
}
if (!skipLengthPrefix) {
// 5/ update the list byte size
int listEnd = byteStream.getLength();
int listSize = listEnd - listStart;
writeSizeAtOffset(byteStream, byteSizeStart, listSize);
}
return;
}
}
static class LBMapSerializer extends LBSerializer {
LBSerializer keySerializer;
LBSerializer valSerializer;
public LBMapSerializer(LBSerializer keySerializer,
LBSerializer valSerializer) {
super();
this.keySerializer = keySerializer;
this.valSerializer = valSerializer;
}
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
MapObjectInspector moi = (MapObjectInspector) objInspector;
ObjectInspector koi = moi.getMapKeyObjectInspector();
ObjectInspector voi = moi.getMapValueObjectInspector();
Map map = moi.getMap(obj);
int byteSizeStart = 0;
int mapStart = 0;
if (!skipLengthPrefix) {
// 1/ reserve spaces for the byte size of the map
// which is a integer and takes four bytes
byteSizeStart = byteStream.getLength();
byteStream.reserve(4);
mapStart = byteStream.getLength();
}
// 2/ write the size of the map which is a VInt
int size = map.size();
LazyBinaryUtils.writeVInt(byteStream, size);
// 3/ write the null bytes
int b = 0;
byte nullByte = 0;
for (Map.Entry entry : map.entrySet()) {
// set the bit to 1 if a key is not null
if (null != entry.getKey()) {
nullByte |= 1 << (b % 8);
} else if (warnedOnceNullMapKey != null) {
if (!warnedOnceNullMapKey.value) {
LOG.warn("Null map key encountered! Ignoring similar problems.");
}
warnedOnceNullMapKey.value = true;
}
b++;
// set the bit to 1 if a value is not null
if (null != entry.getValue()) {
nullByte |= 1 << (b % 8);
}
b++;
// write the byte to stream every 4 key-value pairs
// or if this is the last key-value pair
if (0 == b % 8 || b == size * 2) {
byteStream.write(nullByte);
nullByte = 0;
}
}
// 4/ write key-value pairs one by one
for (Map.Entry entry : map.entrySet()) {
keySerializer.serializeValue(byteStream, entry.getKey(), koi, false, warnedOnceNullMapKey);
valSerializer.serializeValue(byteStream, entry.getValue(), voi, false, warnedOnceNullMapKey);
}
if (!skipLengthPrefix) {
// 5/ update the byte size of the map
int mapEnd = byteStream.getLength();
int mapSize = mapEnd - mapStart;
writeSizeAtOffset(byteStream, byteSizeStart, mapSize);
}
return;
}
}
static class LBStructSerializer extends LBSerializer {
LBSerializer[] serializers;
Object[] fieldData;
public LBStructSerializer(LBSerializer[] serializers) {
super();
this.serializers = serializers;
this.fieldData = new Object[serializers.length];
}
@Override
void serialize(RandomAccessOutput byteStream, Object obj, ObjectInspector objInspector,
boolean skipLengthPrefix, BooleanRef warnedOnceNullMapKey) {
int lasti = 0;
byte nullByte = 0;
int size = serializers.length;
int byteSizeStart = 0;
int typeStart = 0;
if (!skipLengthPrefix) {
// 1/ reserve spaces for the byte size of the struct
// which is a integer and takes four bytes
byteSizeStart = byteStream.getLength();
byteStream.reserve(4);
typeStart = byteStream.getLength();
}
StructObjectInspector soi = (StructObjectInspector) objInspector;
List fields = soi.getAllStructFieldRefs();
for (int i = 0; i < size; ++i) {
StructField structField = fields.get(i);
fieldData[i] = soi.getStructFieldData(obj, structField);
}
for (int i = 0; i < size; ++i) {
// set bit to 1 if a field is not null
if (null != fieldData[i]) {
nullByte |= 1 << (i % 8);
}
// write the null byte every eight elements or
// if this is the last element and serialize the
// corresponding 8 struct fields at the same time
if (7 == i % 8 || i == size - 1) {
byteStream.write(nullByte);
for (int j = lasti; j <= i; j++) {
serializers[j].serializeValue(
byteStream, fieldData[j], fields.get(j).getFieldObjectInspector(),
false, warnedOnceNullMapKey);
}
lasti = i + 1;
nullByte = 0;
}
}
if (!skipLengthPrefix) {
// 3/ update the byte size of the struct
int typeEnd = byteStream.getLength();
int typeSize = typeEnd - typeStart;
writeSizeAtOffset(byteStream, byteSizeStart, typeSize);
}
}
}
static class LBUnionSerializer extends LBSerializer {
LBSerializer[] unionFieldSerializers;
public LBUnionSerializer(LBSerializer[] unionFieldSerializers) {
this.unionFieldSerializers = unionFieldSerializers;
}
@Override
void serialize(RandomAccessOutput byteStream, Object obj,
ObjectInspector objInspector, boolean skipLengthPrefix,
BooleanRef warnedOnceNullMapKey) {
int byteSizeStart = 0;
int typeStart = 0;
if (!skipLengthPrefix) {
// 1/ reserve spaces for the byte size of the struct
// which is a integer and takes four bytes
byteSizeStart = byteStream.getLength();
byteStream.reserve(4);
typeStart = byteStream.getLength();
}
// 2/ serialize the union - tag/value
UnionObjectInspector uoi = (UnionObjectInspector) objInspector;
byte tag = uoi.getTag(obj);
byteStream.write(tag);
unionFieldSerializers[tag].serializeValue(
byteStream, uoi.getField(obj), uoi.getObjectInspectors().get(tag),
false, warnedOnceNullMapKey);
if (!skipLengthPrefix) {
// 3/ update the byte size of the struct
int typeEnd = byteStream.getLength();
int typeSize = typeEnd - typeStart;
writeSizeAtOffset(byteStream, byteSizeStart, typeSize);
}
}
}
}
