target.getDataset().getNamespace(),
UUID.randomUUID().toString());
try {
FileSystemDataset<Record> csvDataset =
(FileSystemDataset) repo.create("default", "csv", csvDescriptor);
Iterator<Path> iter = csvDataset.pathIterator().iterator();
Preconditions.checkArgument(iter.hasNext(),
"CSV path has no data files: " + source);
Schema csvSchema = CSVUtil.inferSchema(