// 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;
}
/**
* Looks up a field with a given name, returning null if not found.
*
* @param rowType Row type
* @param columnName Field name
* @return Field, or null if not found
*/
public static RelDataTypeField lookupField(
boolean caseSensitive, final RelDataType rowType, String columnName) {
RelDataTypeField field = rowType.getField(columnName, caseSensitive);
if (field != null) {
return field;
}
// If record type is flagged as having "any field you ask for",
// return a type. (TODO: Better way to mark accommodating types.)
RelDataTypeField extra = RelDataTypeImpl.extra(rowType);
if (extra != null) {
return new RelDataTypeFieldImpl(columnName, -1, extra.getType());
}
return null;
}