Examples with VoidPointable org.apache.hyracks.data.std.primitive.VoidPointable used on opensource projects

Example 86 with VoidPointable

use of org.apache.hyracks.data.std.primitive.VoidPointable in project asterixdb by apache.

the class RecordMergeDescriptor method createEvaluatorFactory.

@Override
public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
    return new IScalarEvaluatorFactory() {

        private static final long serialVersionUID = 1L;

        @Override
        public IScalarEvaluator createScalarEvaluator(final IHyracksTaskContext ctx) throws HyracksDataException {
            final PointableAllocator pa = new PointableAllocator();
            final IVisitablePointable vp0 = pa.allocateRecordValue(inRecType0);
            final IVisitablePointable vp1 = pa.allocateRecordValue(inRecType1);
            final IPointable argPtr0 = new VoidPointable();
            final IPointable argPtr1 = new VoidPointable();
            final IScalarEvaluator eval0 = args[0].createScalarEvaluator(ctx);
            final IScalarEvaluator eval1 = args[1].createScalarEvaluator(ctx);
            final List<RecordBuilder> rbStack = new ArrayList<>();
            final ArrayBackedValueStorage tabvs = new ArrayBackedValueStorage();
            return new IScalarEvaluator() {

                private final RuntimeRecordTypeInfo runtimeRecordTypeInfo = new RuntimeRecordTypeInfo();

                private final DeepEqualAssessor deepEqualAssesor = new DeepEqualAssessor();

                private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();

                private DataOutput out = resultStorage.getDataOutput();

                @Override
                public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
                    resultStorage.reset();
                    eval0.evaluate(tuple, argPtr0);
                    eval1.evaluate(tuple, argPtr1);
                    vp0.set(argPtr0);
                    vp1.set(argPtr1);
                    ARecordVisitablePointable rp0 = (ARecordVisitablePointable) vp0;
                    ARecordVisitablePointable rp1 = (ARecordVisitablePointable) vp1;
                    try {
                        mergeFields(outRecType, rp0, rp1, true, 0);
                        rbStack.get(0).write(out, true);
                    } catch (IOException | AsterixException e) {
                        throw new HyracksDataException(e);
                    }
                    result.set(resultStorage);
                }

                private void mergeFields(ARecordType combinedType, ARecordVisitablePointable leftRecord, ARecordVisitablePointable rightRecord, boolean openFromParent, int nestedLevel) throws IOException, AsterixException, HyracksDataException {
                    if (rbStack.size() < (nestedLevel + 1)) {
                        rbStack.add(new RecordBuilder());
                    }
                    rbStack.get(nestedLevel).reset(combinedType);
                    rbStack.get(nestedLevel).init();
                    //Add all fields from left record
                    for (int i = 0; i < leftRecord.getFieldNames().size(); i++) {
                        IVisitablePointable leftName = leftRecord.getFieldNames().get(i);
                        IVisitablePointable leftValue = leftRecord.getFieldValues().get(i);
                        IVisitablePointable leftType = leftRecord.getFieldTypeTags().get(i);
                        boolean foundMatch = false;
                        for (int j = 0; j < rightRecord.getFieldNames().size(); j++) {
                            IVisitablePointable rightName = rightRecord.getFieldNames().get(j);
                            IVisitablePointable rightValue = rightRecord.getFieldValues().get(j);
                            IVisitablePointable rightType = rightRecord.getFieldTypeTags().get(j);
                            // Check if same fieldname
                            if (PointableHelper.isEqual(leftName, rightName) && !deepEqualAssesor.isEqual(leftValue, rightValue)) {
                                //Field was found on the right and are subrecords, merge them
                                if (PointableHelper.sameType(ATypeTag.OBJECT, rightType) && PointableHelper.sameType(ATypeTag.OBJECT, leftType)) {
                                    //We are merging two sub records
                                    addFieldToSubRecord(combinedType, leftName, leftValue, rightValue, openFromParent, nestedLevel);
                                    foundMatch = true;
                                } else {
                                    throw new RuntimeDataException(ErrorCode.DUPLICATE_FIELD_NAME, getIdentifier());
                                }
                            }
                        }
                        if (!foundMatch) {
                            addFieldToSubRecord(combinedType, leftName, leftValue, null, openFromParent, nestedLevel);
                        }
                    }
                    //Repeat for right side (ignoring duplicates this time)
                    for (int j = 0; j < rightRecord.getFieldNames().size(); j++) {
                        IVisitablePointable rightName = rightRecord.getFieldNames().get(j);
                        IVisitablePointable rightValue = rightRecord.getFieldValues().get(j);
                        boolean foundMatch = false;
                        for (int i = 0; i < leftRecord.getFieldNames().size(); i++) {
                            IVisitablePointable leftName = leftRecord.getFieldNames().get(i);
                            if (rightName.equals(leftName)) {
                                foundMatch = true;
                            }
                        }
                        if (!foundMatch) {
                            addFieldToSubRecord(combinedType, rightName, rightValue, null, openFromParent, nestedLevel);
                        }
                    }
                }

                /*
                     * Takes in a record type, field name, and the field values (which are record) from two records
                     * Merges them into one record of combinedType
                     * And adds that record as a field to the Record in subrb
                     * the second value can be null, indicated that you just add the value of left as a field to subrb
                     *
                     */
                private void addFieldToSubRecord(ARecordType combinedType, IVisitablePointable fieldNamePointable, IVisitablePointable leftValue, IVisitablePointable rightValue, boolean openFromParent, int nestedLevel) throws IOException, AsterixException, HyracksDataException {
                    runtimeRecordTypeInfo.reset(combinedType);
                    int pos = runtimeRecordTypeInfo.getFieldIndex(fieldNamePointable.getByteArray(), fieldNamePointable.getStartOffset() + 1, fieldNamePointable.getLength() - 1);
                    //Add the merged field
                    if (combinedType != null && pos >= 0) {
                        if (rightValue == null) {
                            rbStack.get(nestedLevel).addField(pos, leftValue);
                        } else {
                            mergeFields((ARecordType) combinedType.getFieldTypes()[pos], (ARecordVisitablePointable) leftValue, (ARecordVisitablePointable) rightValue, false, nestedLevel + 1);
                            tabvs.reset();
                            rbStack.get(nestedLevel + 1).write(tabvs.getDataOutput(), true);
                            rbStack.get(nestedLevel).addField(pos, tabvs);
                        }
                    } else {
                        if (rightValue == null) {
                            rbStack.get(nestedLevel).addField(fieldNamePointable, leftValue);
                        } else {
                            mergeFields(DefaultOpenFieldType.NESTED_OPEN_RECORD_TYPE, (ARecordVisitablePointable) leftValue, (ARecordVisitablePointable) rightValue, false, nestedLevel + 1);
                            tabvs.reset();
                            rbStack.get(nestedLevel + 1).write(tabvs.getDataOutput(), true);
                            rbStack.get(nestedLevel).addField(fieldNamePointable, tabvs);
                        }
                    }
                }
            };
        }
    };
}

Example 87 with VoidPointable

use of org.apache.hyracks.data.std.primitive.VoidPointable in project asterixdb by apache.

the class RecordPairsDescriptor method createEvaluatorFactory.

@Override
public IScalarEvaluatorFactory createEvaluatorFactory(final IScalarEvaluatorFactory[] args) {
    return new IScalarEvaluatorFactory() {

        private static final long serialVersionUID = 1L;

        @Override
        public IScalarEvaluator createScalarEvaluator(IHyracksTaskContext ctx) throws HyracksDataException {
            // For writing each individual output record.
            final ArrayBackedValueStorage itemStorage = new ArrayBackedValueStorage();
            final DataOutput itemOutput = itemStorage.getDataOutput();
            final RecordBuilder recBuilder = new RecordBuilder();
            recBuilder.reset(RecordUtil.FULLY_OPEN_RECORD_TYPE);
            // For writing the resulting list of records.
            final OrderedListBuilder listBuilder = new OrderedListBuilder();
            final ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();
            final DataOutput resultOut = resultStorage.getDataOutput();
            // Sets up the constant field names, "name" for the key field, "value" for the value field.
            final ArrayBackedValueStorage nameStorage = new ArrayBackedValueStorage();
            final ArrayBackedValueStorage valueStorage = new ArrayBackedValueStorage();
            AObjectSerializerDeserializer serde = AObjectSerializerDeserializer.INSTANCE;
            try {
                serde.serialize(new AString("name"), nameStorage.getDataOutput());
                serde.serialize(new AString("value"), valueStorage.getDataOutput());
            } catch (IOException e) {
                throw new HyracksDataException(e);
            }
            return new IScalarEvaluator() {

                private final IScalarEvaluator argEvaluator = args[0].createScalarEvaluator(ctx);

                private final IPointable argPtr = new VoidPointable();

                private final ARecordVisitablePointable recordVisitablePointable = new ARecordVisitablePointable(recType);

                @Override
                public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
                    // Resets the result storage.
                    resultStorage.reset();
                    // Gets the input record.
                    argEvaluator.evaluate(tuple, argPtr);
                    byte inputTypeTag = argPtr.getByteArray()[argPtr.getStartOffset()];
                    if (inputTypeTag != ATypeTag.SERIALIZED_RECORD_TYPE_TAG) {
                        throw new TypeMismatchException(getIdentifier(), 0, inputTypeTag, ATypeTag.SERIALIZED_RECORD_TYPE_TAG);
                    }
                    recordVisitablePointable.set(argPtr);
                    listBuilder.reset(AOrderedListType.FULL_OPEN_ORDEREDLIST_TYPE);
                    List<IVisitablePointable> fieldNames = recordVisitablePointable.getFieldNames();
                    List<IVisitablePointable> fieldValues = recordVisitablePointable.getFieldValues();
                    // Adds each field of the input record as a key-value pair into the result.
                    int numFields = recordVisitablePointable.getFieldNames().size();
                    for (int fieldIndex = 0; fieldIndex < numFields; ++fieldIndex) {
                        itemStorage.reset();
                        recBuilder.init();
                        recBuilder.addField(nameStorage, fieldNames.get(fieldIndex));
                        recBuilder.addField(valueStorage, fieldValues.get(fieldIndex));
                        recBuilder.write(itemOutput, true);
                        listBuilder.addItem(itemStorage);
                    }
                    // Writes the result and sets the result pointable.
                    listBuilder.write(resultOut, true);
                    result.set(resultStorage);
                }
            };
        }
    };
}

Example 88 with VoidPointable

use of org.apache.hyracks.data.std.primitive.VoidPointable in project asterixdb by apache.

the class RecordRemoveFieldsEvalFactory method createScalarEvaluator.

@Override
public IScalarEvaluator createScalarEvaluator(final IHyracksTaskContext ctx) throws HyracksDataException {
    final PointableAllocator pa = new PointableAllocator();
    final IVisitablePointable vp0 = pa.allocateRecordValue(inputRecType);
    final IVisitablePointable vp1 = pa.allocateListValue(inputListType);
    final IPointable inputArg0 = new VoidPointable();
    final IPointable inputArg1 = new VoidPointable();
    final IScalarEvaluator eval0 = inputRecordEvalFactory.createScalarEvaluator(ctx);
    final IScalarEvaluator eval1 = removeFieldPathsFactory.createScalarEvaluator(ctx);
    return new IScalarEvaluator() {

        private final RuntimeRecordTypeInfo runtimeRecordTypeInfo = new RuntimeRecordTypeInfo();

        private final List<RecordBuilder> rbStack = new ArrayList<>();

        private final ArrayBackedValueStorage tabvs = new ArrayBackedValueStorage();

        private final Deque<IVisitablePointable> recordPath = new ArrayDeque<>();

        private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();

        private DataOutput out = resultStorage.getDataOutput();

        @Override
        public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
            resultStorage.reset();
            eval0.evaluate(tuple, inputArg0);
            eval1.evaluate(tuple, inputArg1);
            byte inputTypeTag0 = inputArg0.getByteArray()[inputArg0.getStartOffset()];
            if (inputTypeTag0 != ATypeTag.SERIALIZED_RECORD_TYPE_TAG) {
                throw new TypeMismatchException(BuiltinFunctions.REMOVE_FIELDS, 0, inputTypeTag0, ATypeTag.SERIALIZED_INT32_TYPE_TAG);
            }
            byte inputTypeTag1 = inputArg1.getByteArray()[inputArg1.getStartOffset()];
            if (inputTypeTag1 != ATypeTag.SERIALIZED_ORDEREDLIST_TYPE_TAG) {
                throw new TypeMismatchException(BuiltinFunctions.REMOVE_FIELDS, 1, inputTypeTag1, ATypeTag.SERIALIZED_ORDEREDLIST_TYPE_TAG);
            }
            vp0.set(inputArg0);
            vp1.set(inputArg1);
            ARecordVisitablePointable recordPointable = (ARecordVisitablePointable) vp0;
            AListVisitablePointable listPointable = (AListVisitablePointable) vp1;
            try {
                recordPath.clear();
                rbStack.clear();
                processRecord(requiredRecType, recordPointable, listPointable, 0);
                rbStack.get(0).write(out, true);
            } catch (IOException | AsterixException e) {
                throw new HyracksDataException(e);
            }
            result.set(resultStorage);
        }

        private void processRecord(ARecordType requiredType, ARecordVisitablePointable srp, AListVisitablePointable inputList, int nestedLevel) throws IOException, AsterixException, HyracksDataException {
            if (rbStack.size() < (nestedLevel + 1)) {
                rbStack.add(new RecordBuilder());
            }
            rbStack.get(nestedLevel).reset(requiredType);
            rbStack.get(nestedLevel).init();
            List<IVisitablePointable> fieldNames = srp.getFieldNames();
            List<IVisitablePointable> fieldValues = srp.getFieldValues();
            List<IVisitablePointable> fieldTypes = srp.getFieldTypeTags();
            for (int i = 0; i < fieldNames.size(); i++) {
                IVisitablePointable subRecFieldName = fieldNames.get(i);
                recordPath.push(subRecFieldName);
                if (isValidPath(inputList)) {
                    if (requiredType != null && requiredType.getTypeTag() != ATypeTag.ANY) {
                        addKeptFieldToSubRecord(requiredType, subRecFieldName, fieldValues.get(i), fieldTypes.get(i), inputList, nestedLevel);
                    } else {
                        addKeptFieldToSubRecord(DefaultOpenFieldType.NESTED_OPEN_RECORD_TYPE, subRecFieldName, fieldValues.get(i), fieldTypes.get(i), inputList, nestedLevel);
                    }
                }
                recordPath.pop();
            }
        }

        private void addKeptFieldToSubRecord(ARecordType requiredType, IVisitablePointable fieldNamePointable, IVisitablePointable fieldValuePointable, IVisitablePointable fieldTypePointable, AListVisitablePointable inputList, int nestedLevel) throws IOException, AsterixException, HyracksDataException {
            runtimeRecordTypeInfo.reset(requiredType);
            int pos = runtimeRecordTypeInfo.getFieldIndex(fieldNamePointable.getByteArray(), fieldNamePointable.getStartOffset() + 1, fieldNamePointable.getLength() - 1);
            if (pos >= 0) {
                // Closed field
                if (PointableHelper.sameType(ATypeTag.OBJECT, fieldTypePointable)) {
                    processRecord((ARecordType) requiredType.getFieldTypes()[pos], (ARecordVisitablePointable) fieldValuePointable, inputList, nestedLevel + 1);
                    tabvs.reset();
                    rbStack.get(nestedLevel + 1).write(tabvs.getDataOutput(), true);
                    rbStack.get(nestedLevel).addField(pos, tabvs);
                } else {
                    rbStack.get(nestedLevel).addField(pos, fieldValuePointable);
                }
            } else {
                // Open field
                if (PointableHelper.sameType(ATypeTag.OBJECT, fieldTypePointable)) {
                    processRecord(null, (ARecordVisitablePointable) fieldValuePointable, inputList, nestedLevel + 1);
                    tabvs.reset();
                    rbStack.get(nestedLevel + 1).write(tabvs.getDataOutput(), true);
                    rbStack.get(nestedLevel).addField(fieldNamePointable, tabvs);
                } else {
                    rbStack.get(nestedLevel).addField(fieldNamePointable, fieldValuePointable);
                }
            }
        }

        private boolean isValidPath(AListVisitablePointable inputList) throws HyracksDataException {
            List<IVisitablePointable> items = inputList.getItems();
            List<IVisitablePointable> typeTags = inputList.getItemTags();
            int pathLen = recordPath.size();
            for (int i = 0; i < items.size(); i++) {
                IVisitablePointable item = items.get(i);
                if (PointableHelper.sameType(ATypeTag.ARRAY, typeTags.get(i))) {
                    List<IVisitablePointable> inputPathItems = ((AListVisitablePointable) item).getItems();
                    if (pathLen == inputPathItems.size()) {
                        boolean match = true;
                        Iterator<IVisitablePointable> fpi = recordPath.iterator();
                        for (int j = inputPathItems.size() - 1; j >= 0; j--) {
                            match &= PointableHelper.isEqual(inputPathItems.get(j), fpi.next());
                            if (!match) {
                                break;
                            }
                        }
                        if (match) {
                            // Not a valid path for the output record
                            return false;
                        }
                    }
                } else {
                    if (PointableHelper.isEqual(recordPath.getFirst(), item)) {
                        return false;
                    }
                }
            }
            return true;
        }
    };
}

Example 89 with VoidPointable

use of org.apache.hyracks.data.std.primitive.VoidPointable in project asterixdb by apache.

the class FieldAccessByNameEvalFactory method createScalarEvaluator.

@Override
public IScalarEvaluator createScalarEvaluator(final IHyracksTaskContext ctx) throws HyracksDataException {
    return new IScalarEvaluator() {

        private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();

        private DataOutput out = resultStorage.getDataOutput();

        private IPointable inputArg0 = new VoidPointable();

        private IPointable inputArg1 = new VoidPointable();

        private IScalarEvaluator eval0 = recordEvalFactory.createScalarEvaluator(ctx);

        private IScalarEvaluator eval1 = fldNameEvalFactory.createScalarEvaluator(ctx);

        private int fieldValueOffset;

        private int fieldValueLength;

        private ATypeTag fieldValueTypeTag;

        @Override
        public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
            try {
                resultStorage.reset();
                eval0.evaluate(tuple, inputArg0);
                eval1.evaluate(tuple, inputArg1);
                byte[] serRecord = inputArg0.getByteArray();
                int serRecordOffset = inputArg0.getStartOffset();
                int serRecordLen = inputArg0.getLength();
                if (serRecord[serRecordOffset] != ATypeTag.SERIALIZED_RECORD_TYPE_TAG) {
                    throw new TypeMismatchException(BuiltinFunctions.FIELD_ACCESS_BY_NAME, 0, serRecord[serRecordOffset], ATypeTag.SERIALIZED_RECORD_TYPE_TAG);
                }
                byte[] serFldName = inputArg1.getByteArray();
                int serFldNameOffset = inputArg1.getStartOffset();
                fieldValueOffset = ARecordSerializerDeserializer.getFieldOffsetByName(serRecord, serRecordOffset, serRecordLen, serFldName, serFldNameOffset);
                if (fieldValueOffset < 0) {
                    out.writeByte(ATypeTag.SERIALIZED_MISSING_TYPE_TAG);
                    result.set(resultStorage);
                    return;
                }
                fieldValueTypeTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(serRecord[fieldValueOffset]);
                fieldValueLength = NonTaggedFormatUtil.getFieldValueLength(serRecord, fieldValueOffset, fieldValueTypeTag, true) + 1;
                result.set(serRecord, fieldValueOffset, fieldValueLength);
            } catch (IOException e) {
                throw new HyracksDataException(e);
            } catch (AsterixException e) {
                throw new HyracksDataException(e);
            }
        }
    };
}

Example 90 with VoidPointable

use of org.apache.hyracks.data.std.primitive.VoidPointable in project asterixdb by apache.

the class FieldAccessNestedEvalFactory method createScalarEvaluator.

@Override
public IScalarEvaluator createScalarEvaluator(final IHyracksTaskContext ctx) throws HyracksDataException {
    return new IScalarEvaluator() {

        private ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();

        private final DataOutput out = resultStorage.getDataOutput();

        private final ByteArrayAccessibleOutputStream subRecordTmpStream = new ByteArrayAccessibleOutputStream();

        private final IPointable inputArg0 = new VoidPointable();

        private final IScalarEvaluator eval0 = recordEvalFactory.createScalarEvaluator(ctx);

        private final IPointable[] fieldPointables = new VoidPointable[fieldPath.size()];

        private final RuntimeRecordTypeInfo[] recTypeInfos = new RuntimeRecordTypeInfo[fieldPath.size()];

        @SuppressWarnings("unchecked")
        private final ISerializerDeserializer<ANull> nullSerde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.ANULL);

        @SuppressWarnings("unchecked")
        private final ISerializerDeserializer<AMissing> missingSerde = SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AMISSING);

        {
            generateFieldsPointables();
            for (int index = 0; index < fieldPath.size(); ++index) {
                recTypeInfos[index] = new RuntimeRecordTypeInfo();
            }
        }

        @SuppressWarnings("unchecked")
        private void generateFieldsPointables() throws HyracksDataException {
            for (int i = 0; i < fieldPath.size(); i++) {
                ArrayBackedValueStorage storage = new ArrayBackedValueStorage();
                DataOutput out = storage.getDataOutput();
                AString as = new AString(fieldPath.get(i));
                SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(as.getType()).serialize(as, out);
                fieldPointables[i] = new VoidPointable();
                fieldPointables[i].set(storage);
            }
        }

        @Override
        public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
            try {
                resultStorage.reset();
                eval0.evaluate(tuple, inputArg0);
                byte[] serRecord = inputArg0.getByteArray();
                int offset = inputArg0.getStartOffset();
                int start = offset;
                int len = inputArg0.getLength();
                if (serRecord[start] != ATypeTag.SERIALIZED_RECORD_TYPE_TAG) {
                    throw new TypeMismatchException(BuiltinFunctions.FIELD_ACCESS_NESTED, 0, serRecord[start], ATypeTag.SERIALIZED_RECORD_TYPE_TAG);
                }
                int subFieldIndex = -1;
                int subFieldOffset = -1;
                int subFieldLength = -1;
                int nullBitmapSize = -1;
                IAType subType = recordType;
                recTypeInfos[0].reset(recordType);
                ATypeTag subTypeTag = ATypeTag.MISSING;
                boolean openField = false;
                int pathIndex = 0;
                // Moving through closed fields first.
                for (; pathIndex < fieldPointables.length; pathIndex++) {
                    if (subType.getTypeTag().equals(ATypeTag.UNION)) {
                        //enforced SubType
                        subType = ((AUnionType) subType).getActualType();
                        byte serializedTypeTag = subType.getTypeTag().serialize();
                        if (serializedTypeTag != ATypeTag.SERIALIZED_RECORD_TYPE_TAG) {
                            throw new UnsupportedTypeException(BuiltinFunctions.FIELD_ACCESS_NESTED.getName(), serializedTypeTag);
                        }
                        if (subType.getTypeTag() == ATypeTag.OBJECT) {
                            recTypeInfos[pathIndex].reset((ARecordType) subType);
                        }
                    }
                    subFieldIndex = recTypeInfos[pathIndex].getFieldIndex(fieldPointables[pathIndex].getByteArray(), fieldPointables[pathIndex].getStartOffset() + 1, fieldPointables[pathIndex].getLength() - 1);
                    if (subFieldIndex == -1) {
                        break;
                    }
                    nullBitmapSize = RecordUtil.computeNullBitmapSize((ARecordType) subType);
                    subFieldOffset = ARecordSerializerDeserializer.getFieldOffsetById(serRecord, start, subFieldIndex, nullBitmapSize, ((ARecordType) subType).isOpen());
                    if (subFieldOffset == 0) {
                        // the field is null, we checked the null bit map
                        // any path after null will return null.
                        nullSerde.serialize(ANull.NULL, out);
                        result.set(resultStorage);
                        return;
                    }
                    if (subFieldOffset < 0) {
                        // the field is missing, we checked the missing bit map
                        // any path after missing will return null.
                        missingSerde.serialize(AMissing.MISSING, out);
                        result.set(resultStorage);
                        return;
                    }
                    subType = ((ARecordType) subType).getFieldTypes()[subFieldIndex];
                    if (subType.getTypeTag() == ATypeTag.OBJECT && pathIndex + 1 < fieldPointables.length) {
                        // Move to the next Depth
                        recTypeInfos[pathIndex + 1].reset((ARecordType) subType);
                    }
                    if (subType.getTypeTag().equals(ATypeTag.UNION)) {
                        subTypeTag = ((AUnionType) subType).getActualType().getTypeTag();
                        subFieldLength = NonTaggedFormatUtil.getFieldValueLength(serRecord, subFieldOffset, subTypeTag, false);
                    } else {
                        subTypeTag = subType.getTypeTag();
                        subFieldLength = NonTaggedFormatUtil.getFieldValueLength(serRecord, subFieldOffset, subTypeTag, false);
                    }
                    if (pathIndex < fieldPointables.length - 1) {
                        //setup next iteration
                        subRecordTmpStream.reset();
                        subRecordTmpStream.write(subTypeTag.serialize());
                        subRecordTmpStream.write(serRecord, subFieldOffset, subFieldLength);
                        serRecord = subRecordTmpStream.getByteArray();
                        start = 0;
                    }
                    // type check
                    if (pathIndex < fieldPointables.length - 1 && serRecord[start] != ATypeTag.SERIALIZED_RECORD_TYPE_TAG) {
                        throw new UnsupportedTypeException(BuiltinFunctions.FIELD_ACCESS_NESTED, serRecord[start]);
                    }
                }
                // Moving through open fields after we hit the first open field.
                for (; pathIndex < fieldPointables.length; pathIndex++) {
                    openField = true;
                    subFieldOffset = ARecordSerializerDeserializer.getFieldOffsetByName(serRecord, start, len, fieldPointables[pathIndex].getByteArray(), fieldPointables[pathIndex].getStartOffset());
                    if (subFieldOffset < 0) {
                        out.writeByte(ATypeTag.SERIALIZED_MISSING_TYPE_TAG);
                        result.set(resultStorage);
                        return;
                    }
                    subTypeTag = EnumDeserializer.ATYPETAGDESERIALIZER.deserialize(serRecord[subFieldOffset]);
                    subFieldLength = NonTaggedFormatUtil.getFieldValueLength(serRecord, subFieldOffset, subTypeTag, true) + 1;
                    if (pathIndex >= fieldPointables.length - 1) {
                        continue;
                    }
                    //setup next iteration
                    start = subFieldOffset;
                    len = subFieldLength;
                    // type check
                    if (serRecord[start] == ATypeTag.SERIALIZED_MISSING_TYPE_TAG) {
                        missingSerde.serialize(AMissing.MISSING, out);
                        result.set(resultStorage);
                        return;
                    }
                    if (serRecord[start] != ATypeTag.SERIALIZED_RECORD_TYPE_TAG) {
                        throw new UnsupportedTypeException(BuiltinFunctions.FIELD_ACCESS_NESTED.getName(), serRecord[start]);
                    }
                }
                // emit the final result.
                if (openField) {
                    result.set(serRecord, subFieldOffset, subFieldLength);
                } else {
                    out.writeByte(subTypeTag.serialize());
                    out.write(serRecord, subFieldOffset, subFieldLength);
                    result.set(resultStorage);
                }
            } catch (IOException | AsterixException e) {
                throw new HyracksDataException(e);
            }
        }
    };
}