in src/main/java/net/hydromatic/optiq/impl/csv/CsvSmartTable.java [35:42]
public RelNode toRel(
RelOptTable.ToRelContext context,
RelOptTable relOptTable) {
// Request all fields.
final int fieldCount = relOptTable.getRowType().getFieldCount();
final int[] fields = CsvEnumerator.identityList(fieldCount);
return new CsvTableScan(context.getCluster(), relOptTable, this, fields);
}