throw new TupleMRException("Already aliases set for schema '" + schemaName + "'");
}
for (Map.Entry<String, String> entry : aliases.getAliases().entrySet()) {
String alias = entry.getKey();
if (schema.containsField(alias)) {
throw new TupleMRException("Forbidden alias '" + alias +
"'. Schema '" + schema + "' already contains a field with that name");
}
String referenced = entry.getValue();