// implement RelDataType
public RelDataTypeField getField(String fieldName, boolean caseSensitive) {
for (RelDataTypeField field : fieldList) {
if (Util.match(caseSensitive, field.getName(), fieldName)) {
return field;
}
}
// Extra field
if (fieldList.size() > 0) {
final RelDataTypeField lastField = Iterables.getLast(fieldList);
if (lastField.getName().equals("_extra")) {
return new RelDataTypeFieldImpl(fieldName, -1, lastField.getType());
}
}
return null;
}