int scan_update(Ndb* myNdb,
int update_column,
const char * before_color,
const char * after_color)
{
// Scan all records exclusive and update
// them one by one
int retryAttempt = 0;
const int retryMax = 10;
int updatedRows = 0;
int check;
NdbError err;
NdbTransaction *myTrans;
NdbScanOperation *myScanOp;
const NdbDictionary::Dictionary* myDict= myNdb->getDictionary();
const NdbDictionary::Table *myTable= myDict->getTable("api_scan");
if (myTable == NULL)
APIERROR(myDict->getNdbError());
/**
* Loop as long as :
* retryMax not reached
* failed operations due to TEMPORARY erros
*
* Exit loop;
* retryMax reached
* Permanent error (return -1)
*/
while (true)
{
if (retryAttempt >= retryMax)
{
std::cout << "ERROR: has retried this operation " << retryAttempt
<< " times, failing!" << std::endl;
return -1;
}
myTrans = myNdb->startTransaction();
if (myTrans == NULL)
{
const NdbError err = myNdb->getNdbError();
if (err.status == NdbError::TemporaryError)
{
milliSleep(50);
retryAttempt++;
continue;
}
std::cout << err.message << std::endl;
return -1;
}
/**
* Get a scan operation.
*/
myScanOp = myTrans->getNdbScanOperation(myTable);
if (myScanOp == NULL)
{
std::cout << myTrans->getNdbError().message << std::endl;
myNdb->closeTransaction(myTrans);
return -1;
}
/**
* Define a result set for the scan.
*/
if( myScanOp->readTuples(NdbOperation::LM_Exclusive) )
{
std::cout << myTrans->getNdbError().message << std::endl;
myNdb->closeTransaction(myTrans);
return -1;
}
/**
* Use NdbScanFilter to define a search critera
*/
NdbScanFilter filter(myScanOp) ;
if(filter.begin(NdbScanFilter::AND) < 0 ||
filter.cmp(NdbScanFilter::COND_EQ, update_column, before_color, 20) <0||
filter.end() <0)
{
std::cout << myTrans->getNdbError().message << std::endl;
myNdb->closeTransaction(myTrans);
return -1;
}
/**
* Start scan (NoCommit since we are only reading at this stage);
*/
if(myTrans->execute(NdbTransaction::NoCommit) != 0)
{
err = myTrans->getNdbError();
if(err.status == NdbError::TemporaryError){
std::cout << myTrans->getNdbError().message << std::endl;
myNdb->closeTransaction(myTrans);
milliSleep(50);
continue;
}
std::cout << myTrans->getNdbError().code << std::endl;
myNdb->closeTransaction(myTrans);
return -1;
}
/**
* start of loop: nextResult(true) means that "parallelism" number of
* rows are fetched from NDB and cached in NDBAPI
*/
while((check = myScanOp->nextResult(true)) == 0){
do {
/**
* Get update operation
*/
NdbOperation * myUpdateOp = myScanOp->updateCurrentTuple();
if (myUpdateOp == 0)
{
std::cout << myTrans->getNdbError().message << std::endl;
myNdb->closeTransaction(myTrans);
return -1;
}
updatedRows++;
/**
* do the update
*/
myUpdateOp->setValue(update_column, after_color);
/**
* nextResult(false) means that the records
* cached in the NDBAPI are modified before
* fetching more rows from NDB.
*/
} while((check = myScanOp->nextResult(false)) == 0);
/**
* NoCommit when all cached tuple have been updated
*/
if(check != -1)
{
check = myTrans->execute(NdbTransaction::NoCommit);
}
/**
* Check for errors
*/
err = myTrans->getNdbError();
if(check == -1)
{
if(err.status == NdbError::TemporaryError){
std::cout << myTrans->getNdbError().message << std::endl;
myNdb->closeTransaction(myTrans);
milliSleep(50);
continue;
}
}
/**
* End of loop
*/
}
/**
* Commit all prepared operations
*/
if(myTrans->execute(NdbTransaction::Commit) == -1)
{
if(err.status == NdbError::TemporaryError){
std::cout << myTrans->getNdbError().message << std::endl;
myNdb->closeTransaction(myTrans);
milliSleep(50);
continue;
}
}
std::cout << myTrans->getNdbError().message << std::endl;
myNdb->closeTransaction(myTrans);
return 0;
}
if(myTrans!=0)
{
std::cout << myTrans->getNdbError().message << std::endl;
myNdb->closeTransaction(myTrans);
}
return -1;
}
int
HugoTransactions::indexUpdateRecords(Ndb* pNdb,
const char * idxName,
int records,
int batch){
int updated = 0;
int r = 0;
int retryAttempt = 0;
int check, a, b;
NdbOperation *pOp;
NdbScanOperation * sOp;
const NdbDictionary::Index* pIndex
= pNdb->getDictionary()->getIndex(idxName, tab.getName());
const bool ordered = (pIndex->getType()==NdbDictionary::Index::OrderedIndex);
if (ordered){
batch = 1;
}
allocRows(batch);
while (r < records){
if (retryAttempt >= m_retryMax){
g_info << "ERROR: has retried this operation " << retryAttempt
<< " times, failing!" << endl;
return NDBT_FAILED;
}
pTrans = pNdb->startTransaction();
if (pTrans == NULL) {
const NdbError err = pNdb->getNdbError();
if (err.status == NdbError::TemporaryError){
ERR(err);
NdbSleep_MilliSleep(50);
retryAttempt++;
continue;
}
ERR(err);
return NDBT_FAILED;
}
for(b = 0; b<batch && (b+r)<records; b++){
if(!ordered){
pOp = pTrans->getNdbIndexOperation(idxName, tab.getName());
if (pOp == NULL) {
ERR(pTrans->getNdbError());
closeTransaction(pNdb);
return NDBT_FAILED;
}
check = pOp->readTupleExclusive();
if( check == -1 ) {
ERR(pTrans->getNdbError());
closeTransaction(pNdb);
return NDBT_FAILED;
}
} else {
pOp = sOp = pTrans->getNdbIndexScanOperation(idxName, tab.getName());
if (pOp == NULL) {
ERR(pTrans->getNdbError());
closeTransaction(pNdb);
return NDBT_FAILED;
}
check = 0;
sOp->readTuplesExclusive();
}
// Define primary keys
if (equalForRow(pOp, r+b) != 0)
{
closeTransaction(pNdb);
return NDBT_FAILED;
}
// Define attributes to read
for(a = 0; a<tab.getNoOfColumns(); a++){
if((rows[b]->attributeStore(a) =
pOp->getValue(tab.getColumn(a)->getName())) == 0) {
ERR(pTrans->getNdbError());
closeTransaction(pNdb);
return NDBT_FAILED;
}
}
}
check = pTrans->execute(NoCommit, AbortOnError);
check = (check == -1 ? -1 : !ordered ? check : sOp->nextResult(true));
if( check == -1 ) {
const NdbError err = pTrans->getNdbError();
ERR(err);
closeTransaction(pNdb);
if (err.status == NdbError::TemporaryError){
NdbSleep_MilliSleep(50);
retryAttempt++;
continue;
}
return NDBT_FAILED;
}
if(ordered && check != 0){
g_err << check << " - Row: " << r << " not found!!" << endl;
closeTransaction(pNdb);
return NDBT_FAILED;
}
for(b = 0; b<batch && (b+r)<records; b++){
if (calc.verifyRowValues(rows[b]) != 0){
closeTransaction(pNdb);
return NDBT_FAILED;
}
int updates = calc.getUpdatesValue(rows[b]) + 1;
NdbOperation* pUpdOp;
if(!ordered){
pUpdOp = pTrans->getNdbIndexOperation(idxName, tab.getName());
check = (pUpdOp == 0 ? -1 : pUpdOp->updateTuple());
} else {
pUpdOp = sOp->updateCurrentTuple();
}
if (pUpdOp == NULL) {
ERR(pTrans->getNdbError());
closeTransaction(pNdb);
return NDBT_FAILED;
}
if( check == -1 ) {
ERR(pTrans->getNdbError());
closeTransaction(pNdb);
return NDBT_FAILED;
}
if(!ordered)
{
if (equalForRow(pUpdOp, r+b) != 0)
{
closeTransaction(pNdb);
return NDBT_FAILED;
}
}
for(a = 0; a<tab.getNoOfColumns(); a++){
if (tab.getColumn(a)->getPrimaryKey() == false){
if(setValueForAttr(pUpdOp, a, r+b, updates ) != 0){
ERR(pTrans->getNdbError());
closeTransaction(pNdb);
return NDBT_FAILED;
}
}
}
}
check = pTrans->execute(Commit, AbortOnError);
if( check == -1 ) {
const NdbError err = pTrans->getNdbError();
ERR(err);
closeTransaction(pNdb);
if (err.status == NdbError::TemporaryError){
NdbSleep_MilliSleep(50);
retryAttempt++;
continue;
}
ndbout << "r = " << r << endl;
return NDBT_FAILED;
} else {
updated += batch;
m_latest_gci = pTrans->getGCI();
}
closeTransaction(pNdb);
r+= batch; // Read next record
}
g_info << "|- " << updated << " records updated" << endl;
return NDBT_OK;
}