C++ CExpression::DbgPrint方法代码示例

//---------------------------------------------------------------------------
//	@function:
//		CMDAccessorTest::EresUnittest_IndexPartConstraint
//
//	@doc:
//		Test fetching part constraints for indexes on partitioned tables
//
//---------------------------------------------------------------------------
GPOS_RESULT
CMDAccessorTest::EresUnittest_IndexPartConstraint()
{
	CAutoMemoryPool amp;
	IMemoryPool *mp = amp.Pmp();

	CAutoTrace at(mp);

	// Setup an MD cache with a file-based provider
	CMDProviderMemory *pmdp = CTestUtils::m_pmdpf;
	pmdp->AddRef();
	CMDAccessor mda(mp, CMDCache::Pcache(), CTestUtils::m_sysidDefault, pmdp);

	// install opt context in TLS
	CAutoOptCtxt aoc
					(
					mp,
					&mda,
					NULL,  /* pceeval */
					CTestUtils::GetCostModel(mp)
					);
	CColumnFactory *col_factory = COptCtxt::PoctxtFromTLS()->Pcf();

	// lookup a relation in the MD cache
	CMDIdGPDB *rel_mdid =  GPOS_NEW(mp) CMDIdGPDB(GPOPT_TEST_REL_OID22);

	const IMDRelation *pmdrel = mda.RetrieveRel(rel_mdid);
	GPOS_ASSERT(0 < pmdrel->IndexCount());

	// create the array of column reference for the table columns
	// for the DXL to Expr translation
	CColRefArray *colref_array = GPOS_NEW(mp) CColRefArray(mp);
	const ULONG num_cols = pmdrel->ColumnCount() - pmdrel->SystemColumnsCount();
	for (ULONG ul = 0; ul < num_cols; ul++)
	{
		const IMDColumn *pmdcol = pmdrel->GetMdCol(ul);
		const IMDType *pmdtype = mda.RetrieveType(pmdcol->MdidType());
		CColRef *colref = col_factory->PcrCreate(pmdtype, pmdcol->TypeModifier());
		colref_array->Append(colref);
	}

	// get one of its indexes
	GPOS_ASSERT(0 < pmdrel->IndexCount());
	IMDId *pmdidIndex = pmdrel->IndexMDidAt(0);
	const IMDIndex *pmdindex = mda.RetrieveIndex(pmdidIndex);

	// extract and then print the part constraint expression
	IMDPartConstraint *mdpart_constraint = pmdindex->MDPartConstraint();
	GPOS_ASSERT(NULL != mdpart_constraint);
	
	CExpression *pexpr = mdpart_constraint->GetPartConstraintExpr(mp, &mda, colref_array);

#ifdef GPOS_DEBUG
	IOstream &os(at.Os());

	pexpr->DbgPrint();
	os << std::endl;
#endif // GPOS_DEBUG

	// clean up
	pexpr->Release();
	colref_array->Release();
	rel_mdid->Release();

	return GPOS_OK;
}

//---------------------------------------------------------------------------
//	@function:
//		CContradictionTest::EresUnittest_Constraint
//
//	@doc:
//		Tests for constraint property derivation and constraint push down
//
//---------------------------------------------------------------------------
GPOS_RESULT
CContradictionTest::EresUnittest_Constraint()
{
	CAutoMemoryPool amp;
	IMemoryPool *pmp = amp.Pmp();

	// setup a file-based provider
	CMDProviderMemory *pmdp = CTestUtils::m_pmdpf;
	pmdp->AddRef();
	CMDAccessor mda(pmp, CMDCache::Pcache(), CTestUtils::m_sysidDefault, pmdp);


	typedef CExpression *(*Pfpexpr)(IMemoryPool*);

	Pfpexpr rgpf[] =
		{
		CTestUtils::PexprLogicalApplyWithOuterRef<CLogicalInnerApply>,
		CTestUtils::PexprLogicalApply<CLogicalLeftSemiApply>,
		CTestUtils::PexprLogicalApply<CLogicalLeftAntiSemiApply>,
		CTestUtils::PexprLogicalApplyWithOuterRef<CLogicalLeftOuterApply>,
		CTestUtils::PexprLogicalGet,
		CTestUtils::PexprLogicalGetPartitioned,
		CTestUtils::PexprLogicalSelect,
		CTestUtils::PexprLogicalSelectCmpToConst,
		CTestUtils::PexprLogicalSelectPartitioned,
		CTestUtils::PexprLogicalSelectWithContradiction,
		CTestUtils::PexprLogicalJoin<CLogicalInnerJoin>,
		CTestUtils::PexprLogicalJoin<CLogicalLeftOuterJoin>,
		CTestUtils::PexprLogicalJoin<CLogicalLeftSemiJoin>,
		CTestUtils::PexprLogicalJoin<CLogicalLeftAntiSemiJoin>,
		CTestUtils::PexprLogicalGbAgg,
		CTestUtils::PexprLogicalGbAggOverJoin,
		CTestUtils::PexprLogicalGbAggWithSum,
		CTestUtils::PexprLogicalLimit,
		CTestUtils::PexprLogicalNAryJoin,
		CTestUtils::PexprLogicalProject,
		CTestUtils::PexprConstTableGet5,
		CTestUtils::PexprLogicalDynamicGet,
		CTestUtils::PexprLogicalSequence,
		CTestUtils::PexprLogicalTVFTwoArgs,
		};

	for (ULONG i = 0; i < GPOS_ARRAY_SIZE(rgpf); i++)
	{
		// install opt context in TLS
		CAutoOptCtxt aoc
						(
						pmp,
						&mda,
						NULL,  /* pceeval */
						CTestUtils::Pcm(pmp)
						);

		// generate simple expression
		CExpression *pexpr = rgpf[i](pmp);

		// self-match
		GPOS_ASSERT(pexpr->FMatchDebug(pexpr));

		// debug print
		CWStringDynamic str(pmp, GPOS_WSZ_LIT("\n"));
		COstreamString oss(&str);

		oss << "EXPR:" << std::endl << *pexpr << std::endl;
		GPOS_TRACE(str.Wsz());
		str.Reset();


#ifdef GPOS_DEBUG
		// derive properties on expression
		(void) pexpr->PdpDerive();

		oss << std::endl << "DERIVED PROPS:" << std::endl;
		GPOS_TRACE(str.Wsz());
		str.Reset();
		pexpr->DbgPrint();
#endif // GPOS_DEBUG

 		CExpression *pexprPreprocessed = CExpressionPreprocessor::PexprPreprocess(pmp, pexpr);
		oss	<< std::endl << "PREPROCESSED EXPR:" << std::endl << *pexprPreprocessed << std::endl;
		GPOS_TRACE(str.Wsz());
		str.Reset();

		// cleanup
		pexprPreprocessed->Release();
		pexpr->Release();
	}

	return GPOS_OK;
}