Examples of BagToTuple

org.apache.pig.builtin.BagToTuple
Flatten a bag into a tuple. This UDF performs only flattening at the first level, it doesn't recursively flatten nested bags. Example: {(a),(b),(c)} --> (a,b,c) {(a,b), (c,d), (e,f)} --> (a,b,c,d,e,f); If input bag is null, this UDF will return null;

Examples of org.apache.pig.builtin.BagToTuple

  private BagFactory bf = BagFactory.getInstance();
  private TupleFactory tf = TupleFactory.getInstance();


  @Test
  public void testNullInputBagToTupleUDF() throws Exception {
    BagToTuple udf = new BagToTuple();
    Tuple udfInput = tf.newTuple(1);
    udfInput.set(0, null);
    Tuple output = udf.exec(udfInput);
    assertNull(output);
  }

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Examples of org.apache.pig.builtin.BagToTuple


    Tuple udfInput = tf.newTuple(1);
    udfInput.set(0, bag);


    // invoking UDF
    BagToTuple udf = new BagToTuple();
    Tuple result = udf.exec(udfInput);


    int totalExpectedSize = t1.size() + t2.size();
    assertEquals(totalExpectedSize, result.size());


    for (int i = 0; i < t1.size(); i++) {

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Examples of org.apache.pig.builtin.BagToTuple


    Tuple udfInput = tf.newTuple(1);
    udfInput.set(0, bag);


    // invoking UDF
    BagToTuple udf = new BagToTuple();
    Tuple outputTuple = udf.exec(udfInput);


    int totalExpectedSize = t1.size() + t2.size() + t3.size();
    assertEquals(totalExpectedSize, outputTuple.size());


    for (int i = 0; i < t1.size(); i++) {

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Examples of org.apache.pig.builtin.BagToTuple

  public void testNestedDataElementsForBagToTupleUDF() throws Exception {


    DataBag inputBag = buildBagWithNestedTupleAndBag();




    BagToTuple udf = new BagToTuple();
    Tuple udfInput = tf.newTuple(1);
    udfInput.set(0, inputBag);
    Tuple outputTuple = udf.exec(udfInput);




    Iterator<Tuple> inputBagIterator = inputBag.iterator();
    Tuple firstTuple = inputBagIterator.next();
    for (int i = 0; i < firstTuple.size(); i++) {

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Examples of org.apache.pig.builtin.BagToTuple

    bagSch.schema = new Schema(tupSch);


    Schema inputSch = new Schema();
    inputSch.add(bagSch);


    BagToTuple udf = new BagToTuple();
    Schema outputSchema = udf.outputSchema(inputSch);


    assertEquals("schema of BagToTuple input", expectedSch.size(),
        outputSchema.size());
    assertTrue("schema of BagToTuple input",
        Schema.equals(expectedSch, outputSchema, false, true));

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Examples of org.apache.pig.builtin.BagToTuple

  public void testInvalidInputToBagToTupleUDF() throws Exception {
    TupleFactory tf = TupleFactory.getInstance();
    Tuple udfInput = tf.newTuple(1);
    // input contains tuple instead of bag
    udfInput.set(0, tf.newTuple());
    BagToTuple udf = new BagToTuple();


    // expecting an exception because the input if of type Tuple, not DataBag
    udf.exec(udfInput);
  }

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