本文整理汇总了C++中NdbOperation::openScanExclusive方法的典型用法代码示例。如果您正苦于以下问题：C++ NdbOperation::openScanExclusive方法的具体用法？C++ NdbOperation::openScanExclusive怎么用？C++ NdbOperation::openScanExclusive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NdbOperation的用法示例。
在下文中一共展示了NdbOperation::openScanExclusive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: scan_rows
void scan_rows(Ndb* pMyNdb, int opType, int tupleType, int scanType) {
int check = -1 ;
int loop_count_ops = nRecords ;
int eOf = -1 ;
int readValue = 0 ;
int readValue2 = 0 ;
int scanCount = 0 ;
TTYPE fail = NO_FAIL ;
for (int count=0 ; count < loop_count_ops ; count++) {
NdbConnection* MyTransaction = pMyNdb->startTransaction();
if (!MyTransaction) error_handler(pMyNdb->getNdbError(), NO_FAIL);
NdbOperation* MyOperation = MyTransaction->getNdbOperation(tableName);
if (!MyOperation) error_handler(pMyNdb->getNdbError(), NO_FAIL);
if (opType == 1)
// Open for scan read, Creates the SCAN_TABREQ and if needed
// SCAN_TABINFO signals.
check = MyOperation->openScanRead(1);
else if (opType == 2)
// Open for scan with update of rows.
check = MyOperation->openScanExclusive(1);
// Create ATTRINFO signal(s) for interpreted program used for
// defining search criteria and column values that should be returned.
scanCount = count+1 ;
switch(tupleType) {
case 1:
fail = t_exitMethods(scanCount, MyOperation, opType);
break;
case 2:
fail = t_incValue(scanCount, MyOperation);
break;
case 3:
fail = t_subValue(scanCount, MyOperation);
break;
case 4:
fail = t_readAttr(scanCount, MyOperation);
break;
case 5:
fail = t_writeAttr(scanCount, MyOperation);
break;
case 6:
fail = t_loadConst(scanCount, MyOperation, opType);
break;
case 7:
fail = t_branch(scanCount, MyOperation);
break;
case 8:
fail = t_branchIfNull(scanCount, MyOperation);
break;
case 9:
fail = t_addReg(scanCount, MyOperation);
break;
case 10:
fail = t_subReg(scanCount, MyOperation);
break;
case 11:
fail = t_subroutineWithBranchLabel(scanCount, MyOperation);
break;
default:
break ;
}
if(11 != tupleType) MyOperation->getValue(attrName[1], (char*)&readValue);
// Sends the SCAN_TABREQ, (SCAN_TABINFO) and ATTRINFO signals and then
// reads the answer in TRANSID_AI. Confirmation is received through SCAN_TABCONF or
// SCAN_TABREF if failure.
check = MyTransaction->executeScan();
if (check == -1) {
//ndbout << endl << "executeScan returned: " << MyTransaction->getNdbError() << endl;
error_handler(MyTransaction->getNdbError(), fail) ;
pMyNdb->closeTransaction(MyTransaction);
} else {
// Sends the SCAN_NEXTREQ signal(s) and reads the answer in TRANS_ID signals.
// SCAN_TABCONF or SCAN_TABREF is the confirmation.
while ((eOf = MyTransaction->nextScanResult()) == 0) {
ndbout << readValue <<"; ";
// Here we call takeOverScanOp for update of the tuple.
}
ndbout << endl ;
pMyNdb->closeTransaction(MyTransaction);
if (eOf == -1) {
ndbout << endl << "nextScanResult returned: "<< MyTransaction->getNdbError() << endl;
} else {
ndbout << "OK" << endl;
}
}
}
return;
};