本文整理汇总了C++中NdbScanOperation::interpret_exit_last_row方法的典型用法代码示例。如果您正苦于以下问题：C++ NdbScanOperation::interpret_exit_last_row方法的具体用法？C++ NdbScanOperation::interpret_exit_last_row怎么用？C++ NdbScanOperation::interpret_exit_last_row使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类NdbScanOperation的用法示例。
在下文中一共展示了NdbScanOperation::interpret_exit_last_row方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: while
int
select_count(Ndb* pNdb, const NdbDictionary::Table* pTab,
int parallelism,
int* count_rows,
NdbOperation::LockMode lock){
int retryAttempt = 0;
const int retryMax = 100;
int check;
NdbTransaction *pTrans;
NdbScanOperation *pOp;
while (true){
if (retryAttempt >= 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){
NdbSleep_MilliSleep(50);
retryAttempt++;
continue;
}
ERR(err);
return NDBT_FAILED;
}
pOp = pTrans->getNdbScanOperation(pTab->getName());
if (pOp == NULL) {
ERR(pTrans->getNdbError());
pNdb->closeTransaction(pTrans);
return NDBT_FAILED;
}
if( pOp->readTuples(NdbScanOperation::LM_Dirty) ) {
ERR(pTrans->getNdbError());
pNdb->closeTransaction(pTrans);
return NDBT_FAILED;
}
check = pOp->interpret_exit_last_row();
if( check == -1 ) {
ERR(pTrans->getNdbError());
pNdb->closeTransaction(pTrans);
return NDBT_FAILED;
}
Uint64 tmp;
Uint32 row_size;
pOp->getValue(NdbDictionary::Column::ROW_COUNT, (char*)&tmp);
pOp->getValue(NdbDictionary::Column::ROW_SIZE, (char*)&row_size);
check = pTrans->execute(NdbTransaction::NoCommit);
if( check == -1 ) {
ERR(pTrans->getNdbError());
pNdb->closeTransaction(pTrans);
return NDBT_FAILED;
}
Uint64 row_count = 0;
int eof;
while((eof = pOp->nextResult(true)) == 0){
row_count += tmp;
}
if (eof == -1) {
const NdbError err = pTrans->getNdbError();
if (err.status == NdbError::TemporaryError){
pNdb->closeTransaction(pTrans);
NdbSleep_MilliSleep(50);
retryAttempt++;
continue;
}
ERR(err);
pNdb->closeTransaction(pTrans);
return NDBT_FAILED;
}
pNdb->closeTransaction(pTrans);
if (count_rows != NULL){
*count_rows = row_count;
}
return NDBT_OK;
}
return NDBT_FAILED;
}