C++ LogRecord::getEstimatedLength方法代码示例

//.........这里部分代码省略.........
                int32_t numCols = -1;

                // See if we can do better by using an index instead
                TableIndex *index = table->primaryKeyIndex();

                if (index != NULL) {
                    // First construct tuple for primary key
                    keydata = new char[index->getKeySchema()->tupleLength()];
                    keyTuple = new TableTuple(keydata, index->getKeySchema());

                    for (int i = 0; i < index->getKeySchema()->columnCount(); i++) {
                        keyTuple->setNValue(i, beforeImage->getNValue(index->getColumnIndices()[i]));
                    }

                    // no before image need be recorded, just the primary key
                    beforeImage = NULL;
                }

                // Set the modified column list
                numCols = m_inputTargetMapSize;

                modifiedCols.resize(m_inputTargetMapSize, -1);

                for (int map_ctr = 0; map_ctr < m_inputTargetMapSize; map_ctr++) {
                    // can't use column-id directly, otherwise we would go over vector bounds
                    int pos = m_inputTargetMap[map_ctr].first - 1;

                    modifiedCols.at(pos)
                    = m_inputTargetMap[map_ctr].second;
                }

                // Next, let the input tuple be the diff after image
                afterImage = &m_inputTuple;

                LogRecord *logrecord = new LogRecord(computeTimeStamp(),
                        LogRecord::T_UPDATE,// this is an update record
                        LogRecord::T_FORWARD,// the system is running normally
                        -1,// XXX: prevLSN must be fetched from table!
                        m_engine->getExecutorContext()->currentTxnId() ,// txn id
                        m_engine->getSiteId(),// which execution site
                        m_targetTable->name(),// the table affected
                        keyTuple,// primary key
                        numCols,
                        (numCols > 0) ? &modifiedCols : NULL,
                        beforeImage,
                        afterImage
                );

                size_t logrecordLength = logrecord->getEstimatedLength();
                char *logrecordBuffer = new char[logrecordLength];

                FallbackSerializeOutput output;
                output.initializeWithPosition(logrecordBuffer, logrecordLength, 0);

                logrecord->serializeTo(output);

                LogManager* m_logManager = this->m_engine->getLogManager();
                Logger m_ariesLogger = m_logManager->getAriesLogger();
                //VOLT_WARN("m_logManager : %p AriesLogger : %p",&m_logManager, &m_ariesLogger);
                const Logger *logger = m_logManager->getThreadLogger(LOGGERID_MM_ARIES);

                logger->log(LOGLEVEL_INFO, output.data(), output.position());

                delete[] logrecordBuffer;
                logrecordBuffer = NULL;

                delete logrecord;
                logrecord = NULL;

                if (keydata != NULL) {
                    delete[] keydata;
                    keydata = NULL;
                }

                if (keyTuple != NULL) {
                    delete keyTuple;
                    keyTuple = NULL;
                }
            }

        }
        #endif

        if (!m_targetTable->updateTuple(tempTuple, m_targetTuple,
                                        m_updatesIndexes)) {
            VOLT_INFO("Failed to update tuple from table '%s'",
                      m_targetTable->name().c_str());
            return false;
        }
    }

    VOLT_TRACE("TARGET TABLE - AFTER: %s\n", m_targetTable->debug().c_str());
    // TODO lets output result table here, not in result executor. same thing in
    // delete/insert

    // add to the planfragments count of modified tuples
    m_engine->m_tuplesModified += m_inputTable->activeTupleCount();

    return true;
}

bool DeleteExecutor::p_execute(const NValueArray &params, ReadWriteTracker *tracker) {
    assert(m_targetTable);

    if (m_truncate) {
        VOLT_TRACE("truncating table %s...", m_targetTable->name().c_str());
        // count the truncated tuples as deleted
        m_engine->m_tuplesModified += m_inputTable->activeTupleCount();

        #ifdef ARIES
        if(m_engine->isARIESEnabled()){
            // no need of persistency check, m_targetTable is
            // always persistent for deletes

            LogRecord *logrecord = new LogRecord(computeTimeStamp(),
                    LogRecord::T_TRUNCATE,// this is a truncate record
                    LogRecord::T_FORWARD,// the system is running normally
                    -1,// XXX: prevLSN must be fetched from table!
                    m_engine->getExecutorContext()->currentTxnId() ,// txn id
                    m_engine->getSiteId(),// which execution site
                    m_targetTable->name(),// the table affected
                    NULL,// primary key irrelevant
                    -1,// irrelevant numCols
                    NULL,// list of modified cols irrelevant
                    NULL,// before image irrelevant
                    NULL// after image irrelevant
            );

            size_t logrecordLength = logrecord->getEstimatedLength();
            char *logrecordBuffer = new char[logrecordLength];

            FallbackSerializeOutput output;
            output.initializeWithPosition(logrecordBuffer, logrecordLength, 0);

            logrecord->serializeTo(output);

            LogManager* m_logManager = this->m_engine->getLogManager();
            Logger m_ariesLogger = m_logManager->getAriesLogger();
            //VOLT_WARN("m_logManager : %p AriesLogger : %p",&m_logManager, &m_ariesLogger);
            const Logger *logger = m_logManager->getThreadLogger(LOGGERID_MM_ARIES);

            logger->log(LOGLEVEL_INFO, output.data(), output.position());

            delete[] logrecordBuffer;
            logrecordBuffer = NULL;

            delete logrecord;
            logrecord = NULL;

        }
        #endif

        //m_engine->context().incrementTuples(m_targetTable->activeTupleCount());
        // actually delete all the tuples
        m_targetTable->deleteAllTuples(true);
        return true;
    }
    // XXX : ARIES : Not sure if else is needed ?
    assert(m_inputTable);

    assert(m_inputTuple.sizeInValues() == m_inputTable->columnCount());
    assert(m_targetTuple.sizeInValues() == m_targetTable->columnCount());
    TableIterator inputIterator(m_inputTable);
    while (inputIterator.next(m_inputTuple)) {
        //
        // OPTIMIZATION: Single-Sited Query Plans
        // If our beloved DeletePlanNode is apart of a single-site query plan,
        // then the first column in the input table will be the address of a
        // tuple on the target table that we will want to blow away. This saves
        // us the trouble of having to do an index lookup
        //
        void *targetAddress = m_inputTuple.getNValue(0).castAsAddress();
        m_targetTuple.move(targetAddress);
        
        // Read/Write Set Tracking
        if (tracker != NULL) {
            tracker->markTupleWritten(m_targetTable, &m_targetTuple);
        }

        #ifdef ARIES
        if(m_engine->isARIESEnabled()){
            // no need of persistency check, m_targetTable is
            // always persistent for deletes

            // before image -- target is tuple to be deleted.
            TableTuple *beforeImage = &m_targetTuple;

            TableTuple *keyTuple = NULL;
            char *keydata = NULL;


            // See if we use an index instead
            TableIndex *index = m_targetTable->primaryKeyIndex();

            if (index != NULL) {
                // First construct tuple for primary key
                keydata = new char[index->getKeySchema()->tupleLength()];
                keyTuple = new TableTuple(keydata, index->getKeySchema());

                for (int i = 0; i < index->getKeySchema()->columnCount(); i++) {
                    keyTuple->setNValue(i, beforeImage->getNValue(index->getColumnIndices()[i]));
//.........这里部分代码省略.........