NdbOperation::equal(const char* anAttrName, const char* aValue) NdbOperation::equal(const char* anAttrName, const char* aValue, Uint32 len) 

CREATE TABLE `chartable` ( `id` char(5) NOT NULL, `value` char(5) DEFAULT NULL, PRIMARY KEY (`id`) ) ENGINE=ndbcluster DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci 

int main(int argc, char **argv) { char connection_string[] = "localhost:1186"; Init(connection_string); Ndb *ndb_object = nullptr; RS_Status status = GetNDBObject(ndb_connection, &ndb_object); ndb_object->setCatalogName("test"); const NdbDictionary::Dictionary *dict = ndb_object->getDictionary(); const NdbDictionary::Table *table = dict->getTable("chartable"); const NdbDictionary::Column *col = table->getColumn("id"); NdbTransaction *transaction = ndb_object->startTransaction(table); if (transaction == nullptr) { std::cout << "Tx Start failed" << std::endl; } NdbOperation *operation = transaction->getNdbOperation(table); if (operation == nullptr) { std::cout << "get operation failed" << std::endl; } operation->readTuple(NdbOperation::LM_CommittedRead); // char pk[col->getLength()]; // for (int i = 0; i < col->getLength(); i++) { // pk[i] = 0; // } std::string pkstr = "000000000000000000000000000000000000000000"; // std::memcpy(pk, pkstr.c_str(), pkstr.length()); // std::cout << "mem copy workd" << std::endl; int ret = operation->equal("id", pkstr.c_str(), pkstr.length()); if (ret != 0) { std::cout << "Op equal failed" << std::endl; } NdbRecAttr *val_rec = operation->getValue("value", NULL); ret = transaction->execute(NdbTransaction::Commit); if (ret != 0) { std::cout << "execute failed" << std::endl; } if (transaction->getNdbError().classification == NdbError::NoDataFound) { std::cout << "NOT FOUND" << std::endl; } else { std::cout << "data: " << val_rec->aRef() << std::endl; } ndb_object->closeTransaction(transaction); CloseNDBObject(&ndb_object); Shutdown(); return 0; }