upsert method
Implementation
Future<RawRowData> upsert(FieldData fieldData, WhereData whereData) async {
if (!initialized) throw ArgumentError(C_MUST_INIT);
try {
await select(fieldData, whereData);
await update(fieldData, whereData);
} on SqlException catch (e) {
if (e.sqlExceptionEnum == SqlExceptionEnum.ENTRY_NOT_FOUND ||
e.sqlExceptionEnum == SqlExceptionEnum.FAILED_SELECT) {
await insert(fieldData);
}
}
return fieldData.getRawRowData();
}