void CRUCache::FetchNonInvolvedUsedObjectsMetadata()
{
DSListPosition pos = mvList_.GetHeadPosition();
while (NULL != pos)
{
CRUMV *pMV = mvList_.GetNext(pos);
if (FALSE == pMV->IsInvolved()
||
CDDObject::eON_REQUEST != pMV->GetRefreshType())
{
continue;
}
if (NULL == GetTable(pMV->GetUID()))
{
CDDSchema *pddSch =
GetDDSchemaByName(pMV->GetCatName(), pMV->GetSchName());
CDDMV *pddMV = GetDDMVByName(pddSch, pMV->GetName());
CRUTbl *pTbl = new CRUMVTbl(pddMV);
pTbl->FetchMetadata();
tableList_.AddTail(pTbl);
}
}
}
void CRUAuditRefreshTaskExecutor::EpilogueHandleOnStatementMV()
{
CRUMV &mv = GetRootMV();
CRUTblList &tblList = mv.GetTablesUsedByMe();
DSListPosition pos = tblList.GetHeadPosition();
Int32 i=0;
while (NULL != pos)
{
CRUTbl *pTbl = tblList.GetNext(pos);
CDMPreparedStatement *pStat =
pLockTablesTEDynamicContainer_->GetPreparedStatement(i);
// Perform the LOCK TABLE statement on the used table
// (the lock overlaps the original RP open, therefore
// guaranteeing the lock continuity).
ExecuteStatement(*pStat,IDS_RU_IREFRESH_FAILED);
// Release the DDL lock AND the read-protected open on the used table.
pTbl->ReleaseResources();
}
}
void CRURefreshTaskExecutor::ComposeControlTableStmtForUsedTable(CRUTbl &tbl,
Int32 &stmtIndex,
CRUForceOptions::MdamOptions mdamOpt)
{
CRURefreshSQLComposer myComposer(GetRefreshTask());
if (CRUForceOptions::MDAM_NO_FORCE == mdamOpt)
{
CRUTableForceOptions *forceOpt = GetForceOptionForTable(tbl.GetFullName());
if (NULL == forceOpt)
{
mdamOpt = GetDefaultMdamOptForTable(tbl);
}
else
{
mdamOpt = forceOpt->GetMdamOptions();
}
}
if (CRUForceOptions::MDAM_NO_FORCE != mdamOpt)
{
// Compose CONTROL TABLE table_name MDAM option
myComposer.ComposeCntrlTableMDAMText(mdamOpt, &(tbl.GetFullName()));
pRefreshTEDynamicContainer_->SetStatementText
#pragma nowarn(1506) // warning elimination
(stmtIndex++, myComposer.GetSQL());
#pragma warn(1506) // warning elimination
forceFlags_ |= FORCE_TABLE_MDAM;
}
}
CRUTbl *CRUCache::FetchSingleUsedObject(CRUMV *pUsingMV,
const CDDUIDTriple &uidt)
{
CRUTbl *pTbl;
BOOL isMV = pUsingMV->IsUsedObjectAnMV(uidt.objUID);
if (FALSE == isMV)
{
CDDTable *pddTable = GetDDTableByUID(uidt);
pTbl = new CRURegularTbl(pddTable);
}
else
{
CDDMV *pddMV = GetDDMVByUID(uidt);
pTbl = new CRUMVTbl(pddMV);
// Read the REFRESH-specific metadata
pddMV->FetchMVRefreshMetadata();
// A table based on MV will always inherit the MV's timestamp
pTbl->SetTimestamp(pddMV->GetRefreshedAtTimestamp());
// Inherit the MV's feature.
// If a table is NOT an involved MV, take care not to remove
// its dangling DDL lock (if any) accidentally.
pTbl->SetReleaseDDLLock(pddMV->CanCancelDDLLock());
}
pTbl->SetInvolved();
tableList_.AddTail(pTbl);
return pTbl;
}
void CRUCache::FixupMVTblInterfaces()
{
DSListPosition pos = mvList_.GetHeadPosition();
while (NULL != pos)
{
CRUMV *pMV = mvList_.GetNext(pos);
if (FALSE == pMV->IsInvolved())
{
continue; // Skip the non-involved MVs
}
CRUTbl *pTbl = GetTable(pMV->GetUID());
if (NULL == pTbl)
{
continue; // No table object in the cache, skip
}
// Setup pointers MV <---> table
pMV->SetTblInterface(pTbl);
pTbl->SetMVInterface(pMV);
}
}
TInt64 CRURefreshTaskExecutor::CalculateTimeStamp()
{
CRUTblList &tblList = GetRootMV().GetTablesUsedByMe();
DSListPosition pos = tblList.GetHeadPosition();
CRUTbl *pTbl = tblList.GetNext(pos);
TInt64 minTS = pTbl->GetTimestamp();
while (NULL != pos)
{
pTbl = tblList.GetNext(pos);
TInt64 nextTS = pTbl->GetTimestamp();
minTS = (nextTS < minTS) ? nextTS : minTS;
}
if (0 == minTS)
{
// If the timestamp has not been executed until now,
// this is time to compute it.
// RUASSERT(CDDObject::eRECOMPUTE == GetRootMV().GetRefreshType());
minTS = CRUGlobals::GetCurrentTimestamp();
}
return minTS;
}
CRUCache::~CRUCache()
{
// Normally, all of the DDOL MV/table objects are in
// the eClosed state at this point. However,
// if the destructor is called from inside an exception
// handler when some DDOL object is left in the eModified
// state, the utility should not attempt to save the object
// to the catalog.
DSListPosition pos = mvList_.GetHeadPosition();
while (NULL != pos)
{
CRUMV *pMV = mvList_.GetNext(pos);
pMV->CancelChanges();
}
pos = tableList_.GetHeadPosition();
while (NULL != pos)
{
CRUTbl *pTbl = tableList_.GetNext(pos);
pTbl->CancelChanges();
}
// Since sqlNode_ is an object (not a pointer),
// its destructor is called automatically,
// therefore disposing the cloud of DD objects.
// Since mvList_ and tableList_ *own* the referenced objects,
// there is no need to apply the RemoveAll() method to them.
}
void CRUAuditRefreshTaskExecutor::PrologueHandleOnStatementMV()
{
CRUTblList &tblList = GetRootMV().GetTablesUsedByMe();
DSListPosition pos = tblList.GetHeadPosition();
while (NULL != pos)
{
CRUTbl *pTbl = tblList.GetNext(pos);
pTbl->ExecuteReadProtectedOpen();
}
}
void CRURefreshTaskExecutor::UpdateRootMVCurrentEpochVector()
{
CRUMV &rootMV = GetRootMV();
CRUTblList &tblList = rootMV.GetTablesUsedByMe();
DSListPosition pos = tblList.GetHeadPosition();
while (NULL != pos)
{
CRUTbl *pTbl = tblList.GetNext(pos);
rootMV.SetEpoch(pTbl->GetUID(), pTbl->GetCurrentEpoch());
}
}
BOOL CRULockEquivSetTask::HasObject(TInt64 uid) const
{
DSListPosition pos = tblList_.GetHeadPosition();
while (NULL != pos)
{
CRUTbl *pTbl = tblList_.GetNext(pos);
if (pTbl->GetUID() == uid)
{
return TRUE;
}
}
return FALSE;
}
//--------------------------------------------------------------------------//
// CRULockEquivSetTaskExecutor::SetTimestampToAllTbls()
//--------------------------------------------------------------------------//
void CRULockEquivSetTaskExecutor::SetTimestampToAllTbls(TInt64 ts)
{
CRULockEquivSetTask *pParentTask = (CRULockEquivSetTask *)GetParentTask();
RUASSERT(NULL != pParentTask);
CRUTblList &tblList = pParentTask->GetTableList();
DSListPosition pos = tblList.GetHeadPosition();
while (NULL != pos)
{
CRUTbl *pTbl = tblList.GetNext(pos);
pTbl->SetTimestamp(ts);
}
}
void CRURefreshTaskExecutor::IncrementTopMvCurrentEpoch()
{
CRUMV &mv = GetRefreshTask()->GetTopMV();
if (TRUE == mv.IsInvolvedTbl())
{
CRUTbl *pTbl = mv.GetTblInterface();
pTbl->IncrementCurrentEpoch(TRUE /* through DDOL */);
pTbl->SaveMetadata();
pTbl->SetTimestamp(mv.GetTimestamp());
}
}
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++;
}
}
}
CRUTbl *CRUCache::GetTable(TInt64 objUid) const
{
DSListPosition pos = tableList_.GetHeadPosition();
while (NULL != pos)
{
CRUTbl *pTbl = tableList_.GetNext(pos);
if (pTbl->GetUID() == objUid)
{
return pTbl;
}
}
return NULL;
}
void CRUEmpCheck::ComposeSQL(CRUTbl &tbl, TInt32 upperBound)
{
CDSString sql;
checkMask_ = tbl.GetIUDLogContentTypeBitmap();
if (0 != (checkMask_ & CRUTbl::RANGE))
{
ComposeSelectStmt(tbl, sql, CHECK_NEG_EPOCHS, -upperBound);
pSQLContainer_->SetStatementText(CHECK_NEG_EPOCHS, sql);
}
if (0 != (checkMask_ & CRUTbl::SINGLE_ROW_INSERTS))
{
ComposeSelectStmt(tbl, sql, CHECK_POS_EPOCHS_INSERTS, upperBound);
pSQLContainer_->SetStatementText(CHECK_POS_EPOCHS_INSERTS, sql);
}
if (0 != (checkMask_ & CRUTbl::SINGLE_ROW_OTHER))
{
ComposeSelectStmt(tbl, sql, CHECK_POS_EPOCHS_DELETES, upperBound);
pSQLContainer_->SetStatementText(CHECK_POS_EPOCHS_DELETES, sql);
}
}
void CRUAuditRefreshTaskExecutor::ComposeMySql()
{
CRUSimpleRefreshSQLComposer myComposer(GetRefreshTask());
CRUMV &rootMV = GetRootMV();
if (TRUE == isDeleteMultiTxnContext_)
{
myComposer.ComposeDeleteContextLogTable();
auditRefreshTEDynamicContainer_.SetStatementText
(DELETE_MULT_TXN_CTX_TBL,myComposer.GetSQL());
}
// POPINDEX CatApi request
if (TRUE == isPopindex_)
{
numOfIndexes_ = rootMV.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 = rootMV.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
(i,myComposer.GetSQL());
i++;
}
}
}
//--------------------------------------------------------------------------//
// CRUTableLockProtocol::Init()
//
//--------------------------------------------------------------------------//
void CRUTableLockProtocol::Init(CRUTblList &tblList,
CRUDeltaDefList &DeltaDefList)
{
CRUDeltaDef *pDdef = NULL;
CRUTbl *curTable = NULL;
// For each table in the used table list, find the
// corresponding delta def.
DSListPosition tPos = tblList.GetHeadPosition();
while (tPos != NULL)
{
curTable = tblList.GetNext(tPos);
DSListPosition dPos = DeltaDefList.GetHeadPosition();
while (dPos != NULL)
{
pDdef = DeltaDefList.GetNext(dPos);
// Match each table to its delta def by table UID.
if (curTable->GetUID() == pDdef->tblUid_)
{
// We have a match!
// We need this lock only if the range log has any data in it.
if (TRUE == pDdef->isRangeLogNonEmpty_)
{
if (LocksList_ == NULL)
{
// This is the first match we have found - alloc the list.
LocksList_ = new LocksList();
NothingToLock_ = FALSE;
}
// Alloc a new lock object, init it and add it to the list.
CRUSingleTableLockProtocol *thisLock = new CRUSingleTableLockProtocol();
thisLock->Init(curTable, pDdef->toEpoch_);
LocksList_->AddTail(thisLock);
}
break; // Done with this table.
} // if Matching table UID
} // Loop on DeltaDefList
} // Loop on tblList
}
CDSString CRULockEquivSetTask::GetTaskName() const
{
CDSString name("LOCK SET(");
DSListPosition pos = tblList_.GetHeadPosition();
while (NULL != pos)
{
CRUTbl *pTbl = tblList_.GetNext(pos);
name += pTbl->GetFullName();
if (NULL != pos)
{
name += ",";
}
}
name += ")";
return name;
}
void CRUCache::Dump(CDSString &to, BOOL isExtended) const
{
to += "\n\t\tCACHE DUMP\n";
DSListPosition pos = mvList_.GetHeadPosition();
while (NULL != pos)
{
CRUMV *pMV = mvList_.GetNext(pos);
pMV->Dump(to, isExtended);
}
pos = tableList_.GetHeadPosition();
while (NULL != pos)
{
CRUTbl *pTbl = tableList_.GetNext(pos);
pTbl->Dump(to, isExtended);
}
}
CRULockEquivSetTask::CRULockEquivSetTask(Lng32 id,const CRUTblList &tblList) :
CRUTask(id),
tblList_(eItemsArentOwned)
{
DSListPosition pos = tblList.GetHeadPosition();
while (NULL != pos)
{
CRUTbl *pTbl = tblList.GetNext(pos);
if (TRUE == pTbl->IsNoLockOnRefresh())
{
tblList_.AddTail(pTbl);
}
else
{
tblList_.AddHead(pTbl);
}
}
}
void CRUEmpCheck::
ComposeSelectStmt(CRUTbl &tbl, CDSString &to,
StmtType StmtType, TInt32 upperBound)
{
RUASSERT(CHECK_POS_EPOCHS_INSERTS == StmtType ||
CHECK_POS_EPOCHS_DELETES == StmtType ||
CHECK_NEG_EPOCHS == StmtType);
CDSString iudLogName(tbl.GetIUDLogFullName());
CDSString epochColName("EPOCH");
epochColName =
CRUSQLComposer::
ComposeQuotedColName(CRUTbl::logCrtlColPrefix, epochColName);
CDSString opColName("OPERATION_TYPE");
opColName =
CRUSQLComposer::
ComposeQuotedColName(CRUTbl::logCrtlColPrefix, opColName);
CDSString op1, op2;
if (CHECK_NEG_EPOCHS == StmtType)
{
op1 = " <= ";
op2 = " >= ";
}
else
{
op1 = " >= ";
op2 = " <= ";
}
to = "SELECT [FIRST 1] " + epochColName + "\nFROM " + iudLogName;
to += "\nWHERE " + epochColName + op1 + CRUSQLComposer::ComposeCastExpr("INT");
if (0 != upperBound)
{
to += "\nAND " + epochColName + op2
+ CRUSQLComposer::TInt32ToStr(upperBound);
}
if (CHECK_POS_EPOCHS_INSERTS == StmtType)
{
// Add a predicate specific for single row inserts
to += "\nAND " + opColName + " = 0";
}
else if (CHECK_POS_EPOCHS_DELETES == StmtType)
{
// Add a predicate specific for single row deletes and updates
to += "\nAND (" + opColName + " = 1 OR " + opColName + " = 3)";
}
to += ";";
}
void CRURefreshTaskExecutor::CheckSingleDeltaRestriction()
{
CRUMV &rootMV = GetRootMV();
CRUTblList &tblList = rootMV.GetFullySyncTablesUsedByMe();
DSListPosition pos = tblList.GetHeadPosition();
while (NULL != pos)
{
CRUTbl *pTbl = tblList.GetNext(pos);
RUASSERT (TRUE == pTbl->IsFullySynchronized());
if (TRUE == pTbl->IsEmptyDeltaNeeded()
&&
TRUE == rootMV.IsDeltaNonEmpty(*pTbl))
{
CRUException errDesc;
errDesc.SetError(IDS_RU_INCONSISTENT_JOIN);
errDesc.AddArgument(rootMVName_);
throw errDesc;
}
}
}
void CRUTblEquivSetBuilder::BuildSets()
{
// Initialize the array of sets of CRUTbl
Int32 equivSetsSize = GetDisJointAlg().GetNumOfSets();
// Initialize the sets of CRUTbl
for (Int32 i=0;i<equivSetsSize;i++)
{
equivSetsList_.AddTail(
new CRUTblList(eItemsArentOwned));
}
// Pass all regular tables and add them to the appropriate list
DSListPosition tblPos = syncTablesList_.GetHeadPosition();
while (NULL != tblPos)
{
CRUTbl *pTbl = syncTablesList_.GetNext(tblPos);
Int32 setId = GetDisJointAlg().GetNodeSetId(pTbl->GetUID());
equivSetsList_.GetAt(setId)->AddTail(pTbl);
}
// Remove set with zero size
DSListPosition setsPos = equivSetsList_.GetHeadPosition();
while (NULL != setsPos)
{
DSListPosition setsPrevpos = setsPos;
CRUTblList *pTblList = equivSetsList_.GetNext(setsPos);
if (0 == pTblList->GetCount())
{
equivSetsList_.RemoveAt(setsPrevpos);
}
}
}
void CRUCache::FetchNonInvolvedMVsMetadata()
{
DSListPosition tpos = tableList_.GetHeadPosition();
while (NULL != tpos)
{
CRUTbl *pTbl = tableList_.GetNext(tpos);
// Retrieve the table's private dependency list
CDDUIDTripleList &privTblList = pTbl->GetUIDsOfAllMVsUsingMe();
DSListPosition mvpos = privTblList.GetHeadPosition();
while (NULL != mvpos)
{
CDDUIDTriple &uidt = privTblList.GetNext(mvpos);
CRUMV *pMV = GetMV(uidt.objUID);
if (NULL == pMV)
{
// The MV is non-involved, fetch the DD object
CDDMV *pddMV = GetDDMVByUID(uidt);
// If the MV is not ON REQUEST, skip it
if (CDDObject::eON_REQUEST != pddMV->GetRefreshType())
{
continue;
}
pMV = FetchSingleNonInvolvedMV(pddMV);
}
if (FALSE == pMV->IsInvolved())
{
// If the MV is involved, the pointer exists already
pTbl->AddRefToUsingMV(pMV);
}
}
}
}
void CRULockEquivSetTaskExecutor::
FreezeAllTables(CRULockEquivSetTask *pParentTask)
{
CRUTblList &tblList = pParentTask->GetTableList();
DSListPosition pos = tblList.GetHeadPosition();
while (NULL != pos)
{
CRUTbl *pTbl = tblList.GetNext(pos);
if (TRUE == pTbl->IsIncEpochNeeded())
{
pTbl->ExecuteLogReadProtectedOpen();
}
else
{
if (TRUE == pTbl->IsLongLockNeeded())
{
pTbl->ExecuteReadProtectedOpen();
}
}
}
}
//--------------------------------------------------------------------------//
// CRURefreshTaskExecutor::GetDefaultMdamOptForTable()
//
// If the table has more then two key columns and the range log is not empty
// then mdam must be forced on the table unless the user forced otherwise
//--------------------------------------------------------------------------//
CRUForceOptions::MdamOptions CRURefreshTaskExecutor::GetDefaultMdamOptForTable(CRUTbl &tbl)
{
Int32 numTableKeyCol = tbl.GetKeyColumnList().GetCount();
if (numTableKeyCol < 2)
{
return CRUForceOptions::MDAM_NO_FORCE;
}
if (FALSE == GetRefreshTask()->IsSingleDeltaRefresh())
{
return CRUForceOptions::MDAM_NO_FORCE;
}
const CRUDeltaDef *pDdef = GetRootMV().GetDeltaDefByUid(tbl.GetUID());
if (NULL != pDdef && TRUE == pDdef->isRangeLogNonEmpty_)
{
return CRUForceOptions::MDAM_ON;
}
return CRUForceOptions::MDAM_NO_FORCE;
}
void CRUTblEquivSetBuilder::AddOnRequestMV(CRUMV *pMV)
{
RUASSERT(CDDObject::eON_REQUEST == pMV->GetRefreshType());
GetDisJointAlg().AddVertex(pMV->GetUID());
// All tables in this list are involved tables by definition
CRUTblList &tblList = pMV->GetTablesUsedByMe();
DSListPosition tblPos = tblList.GetHeadPosition();
while (NULL != tblPos)
{
CRUTbl *pTbl = tblList.GetNext(tblPos);
if (TRUE == pTbl->IsFullySynchronized())
{
// This is as syncronized table ,we must place it in the
// syncronized table list and in the disjoint graph
AddSyncTable(pTbl);
GetDisJointAlg().AddEdge(pTbl->GetUID(),pMV->GetUID());
}
if (FALSE == pTbl->IsInvolvedMV())
{
// This is not an involved mv do not add it to the set.
// A not involved mv does not require syncronization
// because it may only be changed by the refresh utility
// and this is prevented by the ddl locks that are place on this
// object
continue;
}
GetDisJointAlg().AddEdge(pTbl->GetUID(),pMV->GetUID());
}
}
void CRUTblEquivSetBuilder::DumpSets()
{
CDSString msg;
msg = "\n Equivalent sets: \n" ;
CRUGlobals::GetInstance()->GetJournal().LogMessage(msg);
for (Int32 i=0;i<GetNumOfSets();i++)
{
msg = "\n Table Set: \n" ;
CRUGlobals::GetInstance()->GetJournal().LogMessage(msg);
DSListPosition tblPos = GetSet(i).GetHeadPosition();
while (NULL != tblPos)
{
CRUTbl *pTbl = GetSet(i).GetNext(tblPos);
CRUGlobals::GetInstance()->GetJournal().
LogMessage(pTbl->GetFullName());
}
}
}
void CRUCache::FetchUsedObjectsMetadataForSingleMV(CRUMV *pMV)
{
CDDUIDTripleList &uList = pMV->GetAllUsedObjectsUIDs();
DSListPosition pos = uList.GetHeadPosition();
while (NULL != pos)
{
CDDUIDTriple& uidt = uList.GetNext(pos);
TInt64 objUid = uidt.objUID;
// Tables that are IGNORE CHANGES and UDFs do not interest us
// for the purpose of REFRESH
if (TRUE == pMV->IsIgnoreChanges(objUid) ||
TRUE == pMV->IsUsedObjectUDF(objUid))
{
continue;
}
// Fetch the pointer to the used table's wrapper object
// (create the wrapper if the table is referenced first)
CRUTbl *pTbl = GetTable(objUid);
if (NULL == pTbl)
{
pTbl = FetchSingleUsedObject(pMV, uidt);
}
// Add the pointer to the table to the MV's list of dependencies.
pMV->AddRefToUsedObject(pTbl);
// Add the pointer to the MV to the table's list of dependencies.
pTbl->AddRefToUsingMV(pMV);
// Register the used object for the DDL lock handling ...
SetupUsedObject(pTbl);
}
}
void CRUTblEquivSetBuilder::AddRecomputeTree(CRUMV *pMV)
{
RUASSERT(CDDObject::eRECOMPUTE == pMV->GetRefreshType());
if (TRUE == GetDisJointAlg().HasVertex(pMV->GetUID()))
{
// The mv is already in the graph and his sub tree must also be there
// by induction
return;
}
GetDisJointAlg().AddVertex(pMV->GetUID());
// Go over all the childs
CRUTblList &tblList = pMV->GetTablesUsedByMe();
DSListPosition tblPos = tblList.GetHeadPosition();
while (NULL != tblPos)
{
CRUTbl *pTbl = tblList.GetNext(tblPos);
if (TRUE == pTbl->IsFullySynchronized())
{
GetDisJointAlg().AddEdge(pTbl->GetUID(),pMV->GetUID());
AddSyncTable(pTbl);
pTbl->SetLongLockIsNeeded();
continue;
}
if (FALSE == pTbl->IsInvolvedMV())
{
// This is not an involved mv do not add it to the set.
// A not involved mv does not require syncronization
// because it may only be changed by the refresh utility
// and this is prevented by the ddl locks that are place on this
// object
continue;
}
// The object is an mv - if its on request we should do nothing
// forcing lock may be skipped and all involved on request
// are already in the graph
GetDisJointAlg().AddEdge(pTbl->GetUID(),pMV->GetUID());
CRUMV *pNextMV = pTbl->GetMVInterface();
RUASSERT(NULL != pNextMV);
if (CDDObject::eON_REQUEST == pNextMV->GetRefreshType() )
{
// All on requests mv's are already in the graph
continue;
}
RUASSERT(CDDObject::eRECOMPUTE ==
pNextMV->GetRefreshType());
// call this function recursively for adding all sub tree
AddRecomputeTree(pNextMV);
}
}
