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From jinfengni <...@git.apache.org>
Subject [GitHub] drill pull request #906: DRILL-5546: Handle schema change exception failure ...
Date Wed, 30 Aug 2017 18:18:04 GMT
Github user jinfengni commented on a diff in the pull request:

    https://github.com/apache/drill/pull/906#discussion_r136149852
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/union/UnionAllRecordBatch.java
---
    @@ -130,562 +145,248 @@ public IterOutcome innerNext() {
       }
     
       @Override
    -  public WritableBatch getWritableBatch() {
    -    return WritableBatch.get(this);
    +  public int getRecordCount() {
    +    return recordCount;
       }
     
    -  private void setValueCount(int count) {
    -    for (ValueVector v : allocationVectors) {
    -      ValueVector.Mutator m = v.getMutator();
    -      m.setValueCount(count);
    -    }
    -  }
     
    -  private boolean doAlloc() {
    -    for (ValueVector v : allocationVectors) {
    -      try {
    -        AllocationHelper.allocateNew(v, current.getRecordCount());
    -      } catch (OutOfMemoryException ex) {
    -        return false;
    -      }
    +  @SuppressWarnings("resource")
    +  private IterOutcome doWork(RecordBatch inputBatch, boolean newSchema) throws ClassTransformationException,
IOException, SchemaChangeException {
    +    if (inputBatch.getSchema().getFieldCount() != container.getSchema().getFieldCount())
{
    +      // wrong.
         }
    -    return true;
    -  }
     
    -  @SuppressWarnings("resource")
    -  private IterOutcome doWork() throws ClassTransformationException, IOException, SchemaChangeException
{
    -    if (allocationVectors != null) {
    -      for (ValueVector v : allocationVectors) {
    -        v.clear();
    -      }
    +    if (newSchema) {
    +      createUnionAller(inputBatch);
         }
     
    -    allocationVectors = Lists.newArrayList();
    -    transfers.clear();
    +    container.zeroVectors();
     
    -    // If both sides of Union-All are empty
    -    if(unionAllInput.isBothSideEmpty()) {
    -      for(int i = 0; i < outputFields.size(); ++i) {
    -        final String colName = outputFields.get(i).getPath();
    -        final MajorType majorType = MajorType.newBuilder()
    -            .setMinorType(MinorType.INT)
    -            .setMode(DataMode.OPTIONAL)
    -            .build();
    -
    -        MaterializedField outputField = MaterializedField.create(colName, majorType);
    -        ValueVector vv = container.addOrGet(outputField, callBack);
    -        allocationVectors.add(vv);
    -      }
    +    for (final ValueVector v : this.allocationVectors) {
    +      AllocationHelper.allocateNew(v, inputBatch.getRecordCount());
    +    }
    --- End diff --
    
    Sounds reasonable. I put two util method in `VectorUtil`, since `VectorAccessibleUtilities`
probably should only take `VectorAccessible` related util method, as its comment stated. 



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