public boolean isFieldSigned(int fieldOrdinal) {
RelDataType type = getFieldType(fieldOrdinal);
if (SqlTypeUtil.isNumeric(type)) {
return true;
} else {
return false;
}
}
public boolean isFieldCaseSensitive(int fieldOrdinal) {
RelDataType type = getFieldType(fieldOrdinal);
return SqlTypeUtil.inCharFamily(type);
}