void CRUDependenceGraph::MergePipelinedTasks(const CRUTaskList &pplTaskList)
{
if (TRUE == pplTaskList.IsEmpty())
{
return;
}
CRURefreshTask *pTopTask = (CRURefreshTask*) pScheduledTask_;
CRURefreshTask *pNewTopTask;
CRUMVList &mvList = pTopTask->GetMVList();
DSListPosition pos = pplTaskList.GetHeadPosition();
while (NULL != pos)
{
// The next task to merge ...
pNewTopTask = (CRURefreshTask*)(pplTaskList.GetNext(pos));
CRUMV &topMV = pNewTopTask->GetRootMV();
mvList.AddTail(&topMV);
// Inherit the connectivity of the newly merged task
InheritTopTaskConnectivity(pNewTopTask);
RemoveFromAvailableList(pNewTopTask);
pTopTask = pNewTopTask;
}
}
void CRURefreshTaskExecutor::FinalMetadataUpdate()
{
CRURefreshTask *pParentTask = GetRefreshTask();
RUASSERT (NULL != pParentTask);
TInt32 currDuration = 0;
TInt64 ts = CalculateTimeStamp();
if (TRUE == pParentTask->NeedToExecuteInternalRefresh())
{
currDuration = GetTimerDuration();
}
CRUMV *pPrevMV, *pCurrMV = NULL;
CRUMVList &mvList = pParentTask->GetMVList();
DSListPosition pos = mvList.GetHeadPosition();
while (NULL != pos)
{
pPrevMV = pCurrMV;
pCurrMV = mvList.GetNext(pos);
// Update the MV's REFRESHED_AT timestamp
pCurrMV->SetTimestamp(ts);
// publish the refresh event to the PUBLISH table
NABoolean isRecomputePublish = (IsRecompute() == TRUE);
pCurrMV->PublishMVRefresh(isRecomputePublish);
if (CDDObject::eON_STATEMENT != pCurrMV->GetRefreshType())
{
if (NULL == pPrevMV)
{
// This is the Root MV (the first in the list)
if (CDDObject::eON_REQUEST == pCurrMV->GetRefreshType())
{
// For every table T used by MV,
// set MV.EPOCH[T]<--T.CURRENT_EPOCH.
UpdateRootMVCurrentEpochVector();
}
UpdateRootMVStatistics(currDuration);
}
else
{
UpdateNonRootMVStatistics(pCurrMV, pPrevMV, currDuration);
}
}
pCurrMV->SaveMetadata();
}
if (CDDObject::eON_STATEMENT != GetRootMV().GetRefreshType())
{
IncrementTopMvCurrentEpoch();
}
}
void CRUUnAuditRefreshTaskExecutor::ComposeMySql()
{
CRURefreshTask *pTask = GetRefreshTask();
CRUMV &mv = pTask->GetRootMV();
CRUSimpleRefreshSQLComposer myComposer(pTask);
// UNLOCK TABLE statement
myComposer.ComposeUnLock(GetRootMVName());
unAuditRefreshTEDynamicContainer_.SetStatementText
(RU_UNLOCK_TABLE, myComposer.GetSQL());
// POPINDEX CatApi request
if (TRUE == isPopindex_)
{
numOfIndexes_ = mv.GetIndexList().GetCount();
if (0 < numOfIndexes_)
{
ComposeIndexesSql();
}
}
// Compose the LOCK TABLE sql statements for locking all tables
// in the on statement MV initialization
if (CDDObject::eON_STATEMENT == GetRootMVType())
{
CRUTblList &tblList = mv.GetTablesUsedByMe();
DSListPosition pos = tblList.GetHeadPosition();
pLockTablesTEDynamicContainer_ =
new CRUSQLDynamicStatementContainer((short)tblList.GetCount());
Int32 i=0;
while (NULL != pos)
{
CRUTbl *pTbl = tblList.GetNext(pos);
myComposer.ComposeLock(pTbl->GetFullName(), FALSE /*shared*/);
pLockTablesTEDynamicContainer_->SetStatementText
#pragma nowarn(1506) // warning elimination
(i,myComposer.GetSQL());
#pragma warn(1506) // warning elimination
i++;
}
}
}
void CRUDependenceGraph::BuildPipelinedTasksList(CRUTaskList &pplTaskList)
{
CRURefreshTask *pTopTask = (CRURefreshTask *)pScheduledTask_;
CRURefreshTask *pNewTopTask = pTopTask;
TInt64 nextCandidateUid;
BOOL isRoot = TRUE;
for (;;)
{
if (pplTaskList.GetCount() + 1 == maxPipelining_)
{
// The user-given limit (including the root task) is reached.
// If the value is 0, the number of tasks is unlimited.
break;
}
CRUMV &topMV = pTopTask->GetRootMV();
if (FALSE
==
topMV.CanPipelineFromMe(isRoot, nextCandidateUid/*by ref*/))
{
break;
}
// After the first time, the top task is no more the root
isRoot = FALSE;
pNewTopTask =
(CRURefreshTask *)GetTask(nextCandidateUid, CRUTask::REFRESH);
if (NULL == pNewTopTask)
{
break;
}
if (FALSE == pNewTopTask->GetRootMV().CanPipelineToMe(topMV))
{
break;
}
pplTaskList.AddTail(pNewTopTask); // Queue the candidate
pTopTask = pNewTopTask; // Move the top task pointer
}
}