C++ (Cpp) CCostContext::Costの例

コード例 #1

ファイル: CGroupExpression.cpp プロジェクト: HanumathRao/gporca

//---------------------------------------------------------------------------
//	@function:
//		CGroupExpression::PccLookupAll
//
//	@doc:
//		Lookup all valid cost contexts matching given optimization context
//
//---------------------------------------------------------------------------
DrgPcc *
CGroupExpression::PdrgpccLookupAll
	(
	IMemoryPool *pmp,
	COptimizationContext *poc
	)
{
	GPOS_ASSERT(NULL != poc);
	DrgPcc *pdrgpcc = GPOS_NEW(pmp) DrgPcc(pmp);

	CCostContext *pccFound = NULL;
	BOOL fValid = false;
	{
		ShtAcc shta(Sht(), poc);
		pccFound = shta.PtLookup();
		fValid = (NULL != pccFound && pccFound->Cost() != GPOPT_INVALID_COST && !pccFound->FPruned());
	}

	while (NULL != pccFound)
	{
		if (fValid)
		{
			pccFound->AddRef();
			pdrgpcc->Append(pccFound);
		}

		{
			ShtAcc shta(Sht(), poc);
			pccFound = shta.PtNext(pccFound);
			fValid = (NULL != pccFound && pccFound->Cost() != GPOPT_INVALID_COST && !pccFound->FPruned());
		}
	}

	return pdrgpcc;
}