greenplumn CPartitionPropagationSpec 源码

  • 2022-08-18
  • 浏览 (481)

greenplumn CPartitionPropagationSpec 代码

文件路径:/src/backend/gporca/libgpopt/include/gpopt/base/CPartitionPropagationSpec.h

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2012 EMC Corp.
//
//	@filename:
//		CPartitionPropagationSpec.h
//
//	@doc:
//		Partition Propagation spec in required properties
//---------------------------------------------------------------------------
#ifndef GPOPT_CPartitionPropagationSpec_H
#define GPOPT_CPartitionPropagationSpec_H

#include "gpos/base.h"
#include "gpos/common/CRefCount.h"

#include "gpopt/base/COptCtxt.h"
#include "gpopt/base/CPropSpec.h"


namespace gpopt
{
using namespace gpos;

//---------------------------------------------------------------------------
//	@class:
//		CPartitionPropagationSpec
//
//	@doc:
//		Partition Propagation specification
//
//---------------------------------------------------------------------------
class CPartitionPropagationSpec : public CPropSpec
{
public:
	enum EPartPropSpecInfoType
	{
		EpptPropagator,
		EpptConsumer,
		EpptSentinel
	};

private:
	struct SPartPropSpecInfo : public CRefCount
	{
		// scan id of the DynamicScan
		ULONG m_scan_id;

		// info type: consumer or propagator
		EPartPropSpecInfoType m_type;

		// relation id of the DynamicScan
		IMDId *m_root_rel_mdid;

		//  partition selector ids to use (reqd only)
		CBitSet *m_selector_ids = nullptr;

		// filter expressions to generate partition pruning data in the translator (reqd only)
		CExpression *m_filter_expr = nullptr;

		SPartPropSpecInfo(ULONG scan_id, EPartPropSpecInfoType type,
						  IMDId *rool_rel_mdid)
			: m_scan_id(scan_id), m_type(type), m_root_rel_mdid(rool_rel_mdid)
		{
			GPOS_ASSERT(m_root_rel_mdid != nullptr);

			CMemoryPool *mp = COptCtxt::PoctxtFromTLS()->Pmp();
			m_selector_ids = GPOS_NEW(mp) CBitSet(mp);
		}

		~SPartPropSpecInfo() override
		{
			m_root_rel_mdid->Release();
			CRefCount::SafeRelease(m_selector_ids);
			CRefCount::SafeRelease(m_filter_expr);
		}

		IOstream &OsPrint(IOstream &os) const;

		// used for determining equality in memo (e.g in optimization contexts)
		BOOL Equals(const SPartPropSpecInfo *) const;

		BOOL FSatisfies(const SPartPropSpecInfo *) const;

		// used for sorting SPartPropSpecInfo in an array
		static INT CmpFunc(const void *val1, const void *val2);
	};

	using SPartPropSpecInfoArray =
		CDynamicPtrArray<SPartPropSpecInfo, CleanupRelease>;

	// partition required/derived info, sorted by scanid
	SPartPropSpecInfoArray *m_part_prop_spec_infos = nullptr;

	// Present scanids (for easy lookup)
	CBitSet *m_scan_ids = nullptr;

public:
	CPartitionPropagationSpec(const CPartitionPropagationSpec &) = delete;

	// ctor
	CPartitionPropagationSpec(CMemoryPool *mp);

	// dtor
	~CPartitionPropagationSpec() override;

	// append enforcers to dynamic array for the given plan properties
	void AppendEnforcers(CMemoryPool *mp, CExpressionHandle &exprhdl,
						 CReqdPropPlan *prpp, CExpressionArray *pdrgpexpr,
						 CExpression *pexpr) override;

	// hash function
	ULONG
	HashValue() const override
	{
		// GPDB_12_MERGE_FIXME: Implement this, even if it's unused
		GPOS_RTL_ASSERT(!"Unused");
	}

	// extract columns used by the partition propagation spec
	CColRefSet *
	PcrsUsed(CMemoryPool *mp) const override
	{
		// return an empty set
		return GPOS_NEW(mp) CColRefSet(mp);
	}

	// property type
	EPropSpecType
	Epst() const override
	{
		return EpstPartPropagation;
	}

	BOOL
	Contains(ULONG scan_id) const
	{
		return m_scan_ids->Get(scan_id);
	}

	BOOL ContainsAnyConsumers() const;

	// equality check to determine compatibility of derived & required properties
	BOOL Equals(const CPartitionPropagationSpec *ppps) const;

	// satisfies function
	BOOL FSatisfies(const CPartitionPropagationSpec *pps_reqd) const;


	SPartPropSpecInfo *FindPartPropSpecInfo(ULONG scan_id) const;

	void Insert(ULONG scan_id, EPartPropSpecInfoType type, IMDId *rool_rel_mdid,
				CBitSet *selector_ids, CExpression *expr);

	void Insert(SPartPropSpecInfo *other);

	void InsertAll(CPartitionPropagationSpec *pps);

	void InsertAllowedConsumers(CPartitionPropagationSpec *pps,
								CBitSet *allowed_scan_ids);

	void InsertAllExcept(CPartitionPropagationSpec *pps, ULONG scan_id);

	const CBitSet *SelectorIds(ULONG scan_id) const;

	// is partition propagation required
	BOOL
	FPartPropagationReqd() const
	{
		return true;
	}

	// print
	IOstream &OsPrint(IOstream &os) const override;

	void InsertAllResolve(CPartitionPropagationSpec *pSpec);
};	// class CPartitionPropagationSpec

}  // namespace gpopt

#endif	// !GPOPT_CPartitionPropagationSpec_H

// EOF

相关信息

greenplumn 源码目录

相关文章

greenplumn CAutoOptCtxt 源码

greenplumn CCTEInfo 源码

greenplumn CCTEMap 源码

greenplumn CCTEReq 源码

greenplumn CCastUtils 源码

greenplumn CColConstraintsArrayMapper 源码

greenplumn CColConstraintsHashMapper 源码

greenplumn CColRef 源码

greenplumn CColRefComputed 源码

greenplumn CColRefSet 源码

0  赞