greenplumn CPhysicalCTEConsumer 源码

greenplumn CPhysicalCTEConsumer 代码

文件路径：/src/backend/gporca/libgpopt/src/operators/CPhysicalCTEConsumer.cpp

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CPhysicalCTEConsumer.cpp
//
//	@doc:
//		Implementation of CTE consumer operator
//---------------------------------------------------------------------------

#include "gpopt/operators/CPhysicalCTEConsumer.h"

#include "gpos/base.h"

#include "gpopt/base/CCTEMap.h"
#include "gpopt/base/COptCtxt.h"
#include "gpopt/operators/CExpression.h"
#include "gpopt/operators/CExpressionHandle.h"
#include "gpopt/operators/CLogicalCTEProducer.h"

using namespace gpopt;

//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::CPhysicalCTEConsumer
//
//	@doc:
//		Ctor
//
//---------------------------------------------------------------------------
CPhysicalCTEConsumer::CPhysicalCTEConsumer(CMemoryPool *mp, ULONG id,
										   CColRefArray *colref_array,
										   UlongToColRefMap *colref_mapping)
	: CPhysical(mp),
	  m_id(id),
	  m_pdrgpcr(colref_array),
	  m_phmulcr(colref_mapping)
{
	GPOS_ASSERT(nullptr != colref_array);
	GPOS_ASSERT(nullptr != colref_mapping);
}

//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::~CPhysicalCTEConsumer
//
//	@doc:
//		Dtor
//
//---------------------------------------------------------------------------
CPhysicalCTEConsumer::~CPhysicalCTEConsumer()
{
	m_pdrgpcr->Release();
	m_phmulcr->Release();
}

//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::PcrsRequired
//
//	@doc:
//		Compute required output columns of the n-th child
//
//---------------------------------------------------------------------------
CColRefSet *
CPhysicalCTEConsumer::PcrsRequired(CMemoryPool *,		 // mp,
								   CExpressionHandle &,	 // exprhdl,
								   CColRefSet *,		 // pcrsRequired,
								   ULONG,				 // child_index,
								   CDrvdPropArray *,	 // pdrgpdpCtxt
								   ULONG				 // ulOptReq
)
{
	GPOS_ASSERT(!"CPhysicalCTEConsumer has no relational children");
	return nullptr;
}

//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::PosRequired
//
//	@doc:
//		Compute required sort order of the n-th child
//
//---------------------------------------------------------------------------
COrderSpec *
CPhysicalCTEConsumer::PosRequired(CMemoryPool *,		// mp,
								  CExpressionHandle &,	// exprhdl,
								  COrderSpec *,			// posRequired,
								  ULONG,				// child_index,
								  CDrvdPropArray *,		// pdrgpdpCtxt
								  ULONG					// ulOptReq
) const
{
	GPOS_ASSERT(!"CPhysicalCTEConsumer has no relational children");
	return nullptr;
}

//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::PdsRequired
//
//	@doc:
//		Compute required distribution of the n-th child
//
//---------------------------------------------------------------------------
CDistributionSpec *
CPhysicalCTEConsumer::PdsRequired(CMemoryPool *,		// mp,
								  CExpressionHandle &,	// exprhdl,
								  CDistributionSpec *,	// pdsRequired,
								  ULONG,				//child_index
								  CDrvdPropArray *,		// pdrgpdpCtxt
								  ULONG					// ulOptReq
) const
{
	GPOS_ASSERT(!"CPhysicalCTEConsumer has no relational children");
	return nullptr;
}

//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::PrsRequired
//
//	@doc:
//		Compute required rewindability of the n-th child
//
//---------------------------------------------------------------------------
CRewindabilitySpec *
CPhysicalCTEConsumer::PrsRequired(CMemoryPool *,		 // mp,
								  CExpressionHandle &,	 // exprhdl,
								  CRewindabilitySpec *,	 // prsRequired,
								  ULONG,				 // child_index,
								  CDrvdPropArray *,		 // pdrgpdpCtxt
								  ULONG					 // ulOptReq
) const
{
	GPOS_ASSERT(!"CPhysicalCTEConsumer has no relational children");
	return nullptr;
}

//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::PcteRequired
//
//	@doc:
//		Compute required CTE map of the n-th child
//
//---------------------------------------------------------------------------
CCTEReq *
CPhysicalCTEConsumer::PcteRequired(CMemoryPool *,		 //mp,
								   CExpressionHandle &,	 //exprhdl,
								   CCTEReq *,			 //pcter,
								   ULONG,				 //child_index,
								   CDrvdPropArray *,	 //pdrgpdpCtxt,
								   ULONG				 //ulOptReq
) const
{
	GPOS_ASSERT(!"CPhysicalCTEConsumer has no relational children");
	return nullptr;
}

//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::PosDerive
//
//	@doc:
//		Derive sort order
//
//---------------------------------------------------------------------------
COrderSpec *
CPhysicalCTEConsumer::PosDerive(CMemoryPool *,		 // mp
								CExpressionHandle &	 //exprhdl
) const
{
	GPOS_ASSERT(!"Unexpected call to CTE consumer order property derivation");

	return nullptr;
}


//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::PdsDerive
//
//	@doc:
//		Derive distribution
//
//---------------------------------------------------------------------------
CDistributionSpec *
CPhysicalCTEConsumer::PdsDerive(CMemoryPool *,		 // mp
								CExpressionHandle &	 //exprhdl
) const
{
	GPOS_ASSERT(
		!"Unexpected call to CTE consumer distribution property derivation");

	return nullptr;
}


//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::PrsDerive
//
//	@doc:
//		Derive rewindability
//
//---------------------------------------------------------------------------
CRewindabilitySpec *
CPhysicalCTEConsumer::PrsDerive(CMemoryPool *,		 //mp
								CExpressionHandle &	 //exprhdl
) const
{
	GPOS_ASSERT(
		!"Unexpected call to CTE consumer rewindability property derivation");

	return nullptr;
}


//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::PcmDerive
//
//	@doc:
//		Derive cte map
//
//---------------------------------------------------------------------------
CCTEMap *
CPhysicalCTEConsumer::PcmDerive(CMemoryPool *mp, CExpressionHandle &
#ifdef GPOS_DEBUG
													 exprhdl
#endif
) const
{
	GPOS_ASSERT(0 == exprhdl.Arity());

	CCTEMap *pcmConsumer = GPOS_NEW(mp) CCTEMap(mp);
	pcmConsumer->Insert(m_id, CCTEMap::EctConsumer, nullptr /*pdpplan*/);

	return pcmConsumer;
}


//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::FProvidesReqdCols
//
//	@doc:
//		Check if required columns are included in output columns
//
//---------------------------------------------------------------------------
BOOL
CPhysicalCTEConsumer::FProvidesReqdCols(CExpressionHandle &exprhdl,
										CColRefSet *pcrsRequired,
										ULONG  // ulOptReq
) const
{
	GPOS_ASSERT(nullptr != pcrsRequired);

	CColRefSet *pcrsOutput = exprhdl.DeriveOutputColumns();
	return pcrsOutput->ContainsAll(pcrsRequired);
}

//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::EpetOrder
//
//	@doc:
//		Return the enforcing type for order property based on this operator
//
//---------------------------------------------------------------------------
CEnfdProp::EPropEnforcingType
CPhysicalCTEConsumer::EpetOrder(CExpressionHandle &exprhdl,
								const CEnfdOrder *peo) const
{
	GPOS_ASSERT(nullptr != peo);
	GPOS_ASSERT(!peo->PosRequired()->IsEmpty());

	COrderSpec *pos = CDrvdPropPlan::Pdpplan(exprhdl.Pdp())->Pos();
	if (peo->FCompatible(pos))
	{
		return CEnfdProp::EpetUnnecessary;
	}

	return CEnfdProp::EpetRequired;
}


//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::EpetRewindability
//
//	@doc:
//		Return the enforcing type for rewindability property based on this operator
//
//---------------------------------------------------------------------------
CEnfdProp::EPropEnforcingType
CPhysicalCTEConsumer::EpetRewindability(CExpressionHandle &exprhdl,
										const CEnfdRewindability *per) const
{
	GPOS_ASSERT(nullptr != per);

	CRewindabilitySpec *prs = CDrvdPropPlan::Pdpplan(exprhdl.Pdp())->Prs();
	if (per->FCompatible(prs))
	{
		return CEnfdProp::EpetUnnecessary;
	}

	return CEnfdProp::EpetRequired;
}


//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::Matches
//
//	@doc:
//		Match function
//
//---------------------------------------------------------------------------
BOOL
CPhysicalCTEConsumer::Matches(COperator *pop) const
{
	if (pop->Eopid() != Eopid())
	{
		return false;
	}

	CPhysicalCTEConsumer *popCTEConsumer =
		CPhysicalCTEConsumer::PopConvert(pop);

	return m_id == popCTEConsumer->UlCTEId() &&
		   m_pdrgpcr->Equals(popCTEConsumer->Pdrgpcr());
}

//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::HashValue
//
//	@doc:
//		Hash function
//
//---------------------------------------------------------------------------
ULONG
CPhysicalCTEConsumer::HashValue() const
{
	ULONG ulHash = gpos::CombineHashes(COperator::HashValue(), m_id);
	ulHash = gpos::CombineHashes(ulHash, CUtils::UlHashColArray(m_pdrgpcr));

	return ulHash;
}

//---------------------------------------------------------------------------
//	@function:
//		CPhysicalCTEConsumer::OsPrint
//
//	@doc:
//		debug print
//
//---------------------------------------------------------------------------
IOstream &
CPhysicalCTEConsumer::OsPrint(IOstream &os) const
{
	os << SzId() << " (";
	os << m_id;
	os << "), Columns: [";
	CUtils::OsPrintDrgPcr(os, m_pdrgpcr);
	os << "]";

	return os;
}

// EOF

相关信息

greenplumn 源码目录

相关文章

greenplumn CExpression 源码

greenplumn CExpressionFactorizer 源码

greenplumn CExpressionHandle 源码

greenplumn CExpressionPreprocessor 源码

greenplumn CExpressionUtils 源码

greenplumn CHashedDistributions 源码

greenplumn CLogical 源码

greenplumn CLogicalApply 源码

greenplumn CLogicalAssert 源码

greenplumn CLogicalBitmapTableGet 源码