Github user paul-rogers commented on a diff in the pull request: https://github.com/apache/drill/pull/906#discussion_r135369535 --- 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()); + } - container.buildSchema(BatchSchema.SelectionVectorMode.NONE); + recordCount = unionall.unionRecords(0, inputBatch.getRecordCount(), 0); + for (final ValueVector v : allocationVectors) { + final ValueVector.Mutator m = v.getMutator(); + m.setValueCount(recordCount); + } + + if (callBack.getSchemaChangedAndReset()) { return IterOutcome.OK_NEW_SCHEMA; + } else { + return IterOutcome.OK; } + } + + private void createUnionAller(RecordBatch inputBatch) throws ClassTransformationException, IOException, SchemaChangeException { + transfers.clear(); + allocationVectors.clear();; --- End diff -- One semi-colon should be enough... :-)
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