public void checkSchema(ResourceSchema s) throws IOException {
// Not actually checking schema
// Actually, just storing it to use in the backend
UDFContext udfc = UDFContext.getUDFContext();
Properties p = udfc.getUDFProperties(this.getClass(), new String[] {udfContextSignature});
p.setProperty(SCHEMA_SIGNATURE, s.toString());
}
@Override
public void prepareToRead(RecordReader recordReader, PigSplit pigSplit) throws IOException {
reader = recordReader;
if (!requiredFieldsInitialized) {
UDFContext udfc = UDFContext.getUDFContext();
Properties p = udfc.getUDFProperties(this.getClass(), new String[] {udfContextSignature});
requiredFields =
(boolean[]) ObjectSerializer.deserialize(p.getProperty(REQUIRED_FIELDS_SIGNATURE));
requiredFieldsInitialized = true;
}
}
public RequiredFieldResponse pushProjection(RequiredFieldList requiredFieldList)
throws FrontendException {
if (requiredFieldList == null) {
return null;
}
if (requiredFieldList.getFields() != null) {
int lastColumn = -1;
for (RequiredField rf : requiredFieldList.getFields()) {
if (rf.getIndex() > lastColumn) {
lastColumn = rf.getIndex();
}
}
requiredFields = new boolean[lastColumn + 1];
for (RequiredField rf : requiredFieldList.getFields()) {
if (rf.getIndex() != -1) requiredFields[rf.getIndex()] = true;
}
Properties p = UDFContext.getUDFContext().getUDFProperties(this.getClass());
try {
p.setProperty(REQUIRED_FIELDS_SIGNATURE, ObjectSerializer.serialize(requiredFields));
} catch (Exception e) {
throw new RuntimeException("Cannot serialize mRequiredColumns");
}
}
return new RequiredFieldResponse(true);
}
private void write(Object part, int id, Vector vector) throws IOException {
SequenceFile.Writer writer = writers.get(part);
if (writer == null) {
Configuration conf = UDFContext.getUDFContext().getJobConf();
Path file = PathUtils.enter(getStorePath(), String.valueOf(part), "part-" + Env.getPartID());
writer = IOUtils.forSequenceWrite(conf, file, IntWritable.class, VectorWritable.class);
writers.put(part, writer);
}
keyWritable.set(id);
valueWritable.set(vector);
writer.append(keyWritable, valueWritable);
}
public void prepareToWrite(RecordWriter writer) {
// Get the schema string from the UDFContext object.
UDFContext udfc = UDFContext.getUDFContext();
Properties p = udfc.getUDFProperties(this.getClass(), new String[] {udfContextSignature});
String strSchema = p.getProperty(SCHEMA_SIGNATURE);
if (strSchema != null) {
// Parse the schema from the string stored in the properties object.
try {
schema = new ResourceSchema(Utils.getSchemaFromString(strSchema));
} catch (ParserException pex) {
logger.warn("Could not parse schema for storing.");
}
}
if (headerTreatment == Headers.DEFAULT) {
headerTreatment = Headers.SKIP_OUTPUT_HEADER;
}
// PigStorage's prepareToWrite()
super.prepareToWrite(writer);
}
public Schema outputSchema(Schema input) {
try {
Properties prop = UDFContext.getUDFContext().getUDFProperties(this.getClass());
String outputAlias = null;
if (input.size() == 1) {
Schema.FieldSchema onlyField = input.getField(0);
outputAlias = onlyField.alias;
if (onlyField.type == DataType.TUPLE) {
prop.setProperty(INPUT_TYPE_SIGNATURE, new Byte(INPUT_TUPLE_FIELD).toString());
determineArrayCollectionType(onlyField.schema, prop);
} else if (onlyField.type == DataType.BAG) {
prop.setProperty(INPUT_TYPE_SIGNATURE, new Byte(INPUT_BAG_FIELD).toString());
Schema tupleSchema = onlyField.schema.getField(0).schema;
if (tupleSchema.size() == 1) {
determineSetCollectionType(tupleSchema, prop);
} else if (tupleSchema.size() == 2) {
determineMapCollectionType(tupleSchema, prop);
} else {
throw new RuntimeException(
"Bag must have either single-element tuples (set) "
+ "or two-element tuples (key, value) to be encoded as a PigArray.");
}
}
} else {
prop.setProperty(INPUT_TYPE_SIGNATURE, new Byte(INPUT_SEVERAL_FIELDS).toString());
determineArrayCollectionType(input, prop);
}
return new Schema(
new Schema.FieldSchema(
outputAlias == null ? "pig_collection" : outputAlias, DataType.BYTEARRAY));
} catch (FrontendException e) {
throw new RuntimeException(e);
}
}
@Test
public void testGetBagSubSchemaConfigured() throws Exception {
// NOTE: pig-0.8 sets client system properties by actually getting the client
// system properties. Starting in pig-0.9 you must pass the properties in.
// When updating our pig dependency this will need updated.
System.setProperty(HCatConstants.HCAT_PIG_INNER_TUPLE_NAME, "t");
System.setProperty(HCatConstants.HCAT_PIG_INNER_FIELD_NAME, "FIELDNAME_tuple");
UDFContext.getUDFContext().setClientSystemProps(System.getProperties());
// Define the expected schema.
ResourceFieldSchema[] bagSubFieldSchemas = new ResourceFieldSchema[1];
bagSubFieldSchemas[0] =
new ResourceFieldSchema()
.setName("t")
.setDescription("The tuple in the bag")
.setType(DataType.TUPLE);
ResourceFieldSchema[] innerTupleFieldSchemas = new ResourceFieldSchema[1];
innerTupleFieldSchemas[0] =
new ResourceFieldSchema().setName("llama_tuple").setType(DataType.CHARARRAY);
bagSubFieldSchemas[0].setSchema(new ResourceSchema().setFields(innerTupleFieldSchemas));
ResourceSchema expected = new ResourceSchema().setFields(bagSubFieldSchemas);
// Get the actual converted schema.
HCatSchema actualHCatSchema =
new HCatSchema(
Lists.newArrayList(
new HCatFieldSchema("innerLlama", HCatFieldSchema.Type.STRING, null)));
HCatFieldSchema actualHCatFieldSchema =
new HCatFieldSchema("llama", HCatFieldSchema.Type.ARRAY, actualHCatSchema, null);
ResourceSchema actual = PigHCatUtil.getBagSubSchema(actualHCatFieldSchema);
Assert.assertEquals(expected.toString(), actual.toString());
}
private Properties getUDFContext() {
return UDFContext.getUDFContext().getUDFProperties(this.getClass(), new String[] {signature});
}
public DataByteArray exec(Tuple input) throws IOException {
try {
Properties prop = UDFContext.getUDFContext().getUDFProperties(this.getClass());
byte inputType = Byte.parseByte(prop.getProperty(INPUT_TYPE_SIGNATURE));
byte arrayType = Byte.parseByte(prop.getProperty(COLLECTION_TYPE_SIGNATURE));
if (arrayType == PigCollection.INT_ARRAY) {
Tuple t = getTupleToEncode(input, inputType);
int arr[] = new int[t.size()];
for (int i = 0; i < t.size(); i++) {
arr[i] = (Integer) t.get(i);
}
return PigCollection.serialize(arr);
} else if (arrayType == PigCollection.FLOAT_ARRAY) {
Tuple t = getTupleToEncode(input, inputType);
float arr[] = new float[t.size()];
for (int i = 0; i < t.size(); i++) {
arr[i] = (Float) t.get(i);
}
return PigCollection.serialize(arr);
} else if (arrayType == PigCollection.INT_INT_MAP) {
DataBag bag = (DataBag) input.get(0);
TIntIntHashMap map = new TIntIntHashMap((int) bag.size());
for (Tuple t : bag) {
map.put((Integer) t.get(0), (Integer) t.get(1));
}
return PigCollection.serialize(map);
} else if (arrayType == PigCollection.INT_FLOAT_MAP) {
DataBag bag = (DataBag) input.get(0);
TIntFloatHashMap map = new TIntFloatHashMap((int) bag.size());
for (Tuple t : bag) {
map.put((Integer) t.get(0), (Float) t.get(1));
}
return PigCollection.serialize(map);
} else if (arrayType == PigCollection.STRING_INT_MAP) {
DataBag bag = (DataBag) input.get(0);
TObjectIntHashMap map = new TObjectIntHashMap((int) bag.size());
for (Tuple t : bag) {
map.put((String) t.get(0), (Integer) t.get(1));
}
return PigCollection.serialize(map);
} else if (arrayType == PigCollection.STRING_FLOAT_MAP) {
DataBag bag = (DataBag) input.get(0);
TObjectFloatHashMap map = new TObjectFloatHashMap((int) bag.size());
for (Tuple t : bag) {
map.put((String) t.get(0), (Float) t.get(1));
}
return PigCollection.serialize(map);
} else if (arrayType == PigCollection.INT_SET) {
DataBag bag = (DataBag) input.get(0);
TIntHashSet set = new TIntHashSet((int) bag.size());
for (Tuple t : bag) {
set.add((Integer) t.get(0));
}
return PigCollection.serialize(set);
} else if (arrayType == PigCollection.STRING_SET) {
DataBag bag = (DataBag) input.get(0);
Set<String> set = new HashSet<String>();
for (Tuple t : bag) {
set.add((String) t.get(0));
}
return PigCollection.serialize(set);
} else {
throw new RuntimeException("Invalid PigCollection type requested");
}
} catch (ExecException e) {
throw new RuntimeException(e);
}
}
/* (non-Javadoc)
* @see org.apache.pig.builtin.PigStorage#getNext()
*/
@Override
public Tuple getNext() throws IOException {
// If SKIP_INPUT_HEADER and this is the first input split, skip header record
// We store its value as a string though, so we can compare
// further records to it. If they are the same (this would
// happen if multiple small files each with a header were combined
// into one split), we know to skip the duplicate header record as well.
if (loadingFirstRecord
&& headerTreatment == Headers.SKIP_INPUT_HEADER
&& (splitIndex == 0 || splitIndex == -1)) {
try {
if (!in.nextKeyValue()) return null;
header = ((Text) in.getCurrentValue()).toString();
} catch (InterruptedException e) {
int errCode = 6018;
String errMsg = "Error while reading input";
throw new ExecException(errMsg, errCode, PigException.REMOTE_ENVIRONMENT, e);
}
}
loadingFirstRecord = false;
mProtoTuple = new ArrayList<Object>();
getNextInQuotedField = false;
boolean evenQuotesSeen = true;
boolean sawEmbeddedRecordDelimiter = false;
byte[] buf = null;
if (!mRequiredColumnsInitialized) {
if (udfContextSignature != null) {
Properties p = UDFContext.getUDFContext().getUDFProperties(this.getClass());
mRequiredColumns =
(boolean[]) ObjectSerializer.deserialize(p.getProperty(udfContextSignature));
}
mRequiredColumnsInitialized = true;
}
// Note: we cannot factor out the check for nextKeyValue() being null,
// because that call overwrites buf with the new line, which is
// bad if we have a field with a newline.
try {
int recordLen = 0;
getNextFieldID = 0;
while (sawEmbeddedRecordDelimiter || getNextFieldID == 0) {
Text value = null;
if (sawEmbeddedRecordDelimiter) {
// Deal with pulling more records from the input, because
// a double quoted embedded newline was encountered in a field.
// Save the length of the record so far, plus one byte for the
// record delimiter (usually newline) that's embedded in the field
// we were working on before falling into this branch:
int prevLineLen = recordLen + 1;
// Save previous line (the one with the field that has the newline) in a new array.
// The last byte will be random; we'll fill in the embedded
// record delimiter (usually newline) below:
byte[] prevLineSaved = Arrays.copyOf(buf, prevLineLen);
prevLineSaved[prevLineLen - 1] = RECORD_DEL;
// Read the continuation of the record, unless EOF:
if (!in.nextKeyValue()) {
return null;
}
value = (Text) in.getCurrentValue();
recordLen = value.getLength();
// Grab the continuation's bytes:
buf = value.getBytes();
// Combine the previous line and the continuation into a new array.
// The following copyOf() does half the job: it allocates all the
// space, and also copies the previous line into that space:
byte[] prevLineAndContinuation = Arrays.copyOf(prevLineSaved, prevLineLen + recordLen);
// Now append the continuation. Parms: fromBuf, fromStartPos, toBuf, toStartPos,
// lengthToCopy:
System.arraycopy(buf, 0, prevLineAndContinuation, prevLineLen, recordLen);
// We'll work with the combination now:
buf = prevLineAndContinuation;
// Do the whole record over from the start:
mProtoTuple.clear();
getNextInQuotedField = false;
evenQuotesSeen = true;
getNextFieldID = 0;
recordLen = prevLineAndContinuation.length;
} else {
// Previous record finished cleanly: start with the next record,
// unless EOF:
if (!in.nextKeyValue()) {
return null;
}
value = (Text) in.getCurrentValue();
// if the line is a duplicate header and 'SKIP_INPUT_HEADER' is set, ignore it
// (this might happen if multiple files each with a header are combined into a single
// split)
if (headerTreatment == Headers.SKIP_INPUT_HEADER && value.toString().equals(header)) {
if (!in.nextKeyValue()) return null;
value = (Text) in.getCurrentValue();
}
buf = value.getBytes();
getNextFieldID = 0;
recordLen = value.getLength();
}
nextTupleSkipChar = false;
ByteBuffer fieldBuffer = ByteBuffer.allocate(recordLen);
sawEmbeddedRecordDelimiter =
processOneInRecord(evenQuotesSeen, buf, recordLen, fieldBuffer);
// The last field is never delimited by a FIELD_DEL, but by
// the end of the record. So we need to add that last field.
// The '!sawEmbeddedRecordDelimiter' handles the case of
// embedded newlines; we are amidst a field, not at
// the final record:
if (!sawEmbeddedRecordDelimiter) readField(fieldBuffer, getNextFieldID++);
} // end while
} catch (InterruptedException e) {
int errCode = 6018;
String errMsg = "Error while reading input";
throw new ExecException(errMsg, errCode, PigException.REMOTE_ENVIRONMENT, e);
}
Tuple t = mTupleFactory.newTupleNoCopy(mProtoTuple);
return t;
}
private String getValueFromUDFContext(final String signature, final String key) {
final UDFContext udfContext = UDFContext.getUDFContext();
final Properties props = udfContext.getUDFProperties(this.getClass(), new String[] {signature});
return props.getProperty(key);
}
private void storeInUDFContext(final String signature, final String key, final String value) {
final UDFContext udfContext = UDFContext.getUDFContext();
final Properties props = udfContext.getUDFProperties(this.getClass(), new String[] {signature});
props.put(key, value);
}
@Override
protected void execute(LogicalExpression op) throws FrontendException {
if (op instanceof UserFuncExpression) {
UserFuncExpression udf = (UserFuncExpression) op;
if (!udf.getEvalFunc().allowCompileTimeCalculation()) {
return;
}
}
boolean valSet = false;
Object val = null;
if (currentWalker.getPlan().getSuccessors(op) != null) {
// If has successors and all successors are constant, calculate the constant
for (Operator succ : currentWalker.getPlan().getSuccessors(op)) {
if (!(succ instanceof ConstantExpression)) {
return;
}
}
// All successors are constant, calculate the value
OperatorPlan expLogicalPlan = new LogicalExpressionPlan();
((BaseOperatorPlan) currentWalker.getPlan())
.moveTree(op, (BaseOperatorPlan) expLogicalPlan);
PhysicalPlan expPhysicalPlan = new PhysicalPlan();
Map<Operator, PhysicalOperator> logToPhyMap = new HashMap<Operator, PhysicalOperator>();
PlanWalker childWalker = new ReverseDependencyOrderWalkerWOSeenChk(expLogicalPlan);
// Save the old walker and use childWalker as current Walker
pushWalker(childWalker);
ExpToPhyTranslationVisitor expTranslationVisitor =
new ExpToPhyTranslationVisitor(
expLogicalPlan, childWalker, currentOp, expPhysicalPlan, logToPhyMap);
expTranslationVisitor.visit();
popWalker();
PhysicalOperator root = expPhysicalPlan.getLeaves().get(0);
try {
UDFContext.getUDFContext()
.addJobConf(ConfigurationUtil.toConfiguration(pc.getProperties(), true));
PigHadoopLogger pigHadoopLogger = PigHadoopLogger.getInstance();
PhysicalOperator.setPigLogger(pigHadoopLogger);
setDefaultTimeZone();
val = root.getNext(root.getResultType()).result;
restoreDefaultTimeZone();
UDFContext.getUDFContext().addJobConf(null);
} catch (ExecException e) {
throw new FrontendException(e);
}
valSet = true;
} else if (op instanceof UserFuncExpression) {
// If solo UDF, calculate UDF
UserFuncExpression udf = (UserFuncExpression) op;
try {
UDFContext.getUDFContext()
.addJobConf(ConfigurationUtil.toConfiguration(pc.getProperties(), true));
setDefaultTimeZone();
val = udf.getEvalFunc().exec(null);
restoreDefaultTimeZone();
UDFContext.getUDFContext().addJobConf(null);
} catch (IOException e) {
throw new FrontendException(e);
}
valSet = true;
}
if (valSet) {
ConstantExpression constantExpr;
constantExpr = new ConstantExpression(currentWalker.getPlan(), val);
constantExpr.inheritSchema(op);
currentWalker.getPlan().replace(op, constantExpr);
}
}
