in src/main/java/net/hydromatic/optiq/impl/csv/CsvTableScan.java [61:69]
public RelDataType deriveRowType() {
final List<RelDataTypeField> fieldList = table.getRowType().getFieldList();
final RelDataTypeFactory.FieldInfoBuilder builder =
getCluster().getTypeFactory().builder();
for (int field : fields) {
builder.add(fieldList.get(field));
}
return builder.build();
}