// ***************************************************************************
// Initialize internal data structures.
// ***************************************************************************
void JBBDetails::init(CollHeap* heap)
{
// Check if this JBB has a GroupBy in it.
const QRGroupByPtr groupBy = jbbDesc_->getGroupBy();
if (groupBy != NULL)
{
hasGroupBy_ = TRUE;
hasEmptyGroupBy_ = groupBy->isEmpty();
}
initBaseTables(heap);
initRangePreds(heap); // For query descriptors, partial init only.
if (isAnMV_)
{
// Init residual predicate data stuctures for MVs only.
initResidualPreds(heap);
}
else
{
// This is a query descriptor.
// Check if it explicitly uses MVs, and if so - replace them so that
// the query will be only on base tables.
// TBD...
}
}
NABoolean QRGroupLattice::getGroupingLatticeKeys(LatticeKeyList& keyList,
QRJoinSubGraphMapPtr map,
DescriptorDetailsPtr queryDetails,
const QRJBBPtr jbb,
NABoolean primaryOnly,
NABoolean insertMode)
{
QRTRACER("QRGroupLattice::getGroupingLatticeKeys()");
// Start with the list of primary grouping columns in the Hub.
const QRGroupByPtr groupBy = jbb->getGroupBy();
// In the aggregate with no GroupBy case, return an empty list.
if (groupBy->isEmpty())
return TRUE;
const ElementPtrList& gbList = groupBy->getPrimaryList()->getList();
NABoolean ok = elementListToKeyList(gbList, keyList, map, queryDetails, insertMode);
if (!ok)
return FALSE;
if (primaryOnly)
return TRUE;
// Now check for dependent grouping columns in the extra-Hub.
QRDependentGroupByPtr depGroupBy = groupBy->getDependentList();
if (depGroupBy != NULL)
{
const ElementPtrList& depKeyList = depGroupBy->getList();
if (!depKeyList.isEmpty())
{
// Dependent grouping columns found - add them to the key list.
ok = elementListToKeyList(depKeyList, keyList, map, queryDetails, insertMode);
if (!ok)
return FALSE;
}
}
return TRUE;
}
