greenplumn CMDCheckConstraintGPDB 源码
greenplumn CMDCheckConstraintGPDB 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/md/CMDCheckConstraintGPDB.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CMDCheckConstraintGPDB.h
//
// @doc:
// Class representing a GPDB check constraint in a metadata cache relation
//---------------------------------------------------------------------------
#ifndef GPMD_CMDCheckConstraintGPDB_H
#define GPMD_CMDCheckConstraintGPDB_H
#include "gpos/base.h"
#include "gpos/string/CWStringDynamic.h"
#include "naucrates/md/CMDName.h"
#include "naucrates/md/IMDCheckConstraint.h"
// fwd decl
namespace gpdxl
{
class CXMLSerializer;
}
namespace gpmd
{
using namespace gpos;
using namespace gpdxl;
//---------------------------------------------------------------------------
// @class:
// CMDCheckConstraintGPDB
//
// @doc:
// Class representing a GPDB check constraint in a metadata cache relation
//
//---------------------------------------------------------------------------
class CMDCheckConstraintGPDB : public IMDCheckConstraint
{
private:
// memory pool
CMemoryPool *m_mp;
// check constraint mdid
IMDId *m_mdid;
// check constraint name
CMDName *m_mdname;
// relation mdid
IMDId *m_rel_mdid;
// the DXL representation of the check constraint
CDXLNode *m_dxl_node;
// DXL for object
const CWStringDynamic *m_dxl_str;
public:
// ctor
CMDCheckConstraintGPDB(CMemoryPool *mp, IMDId *mdid, CMDName *mdname,
IMDId *rel_mdid, CDXLNode *dxlnode);
// dtor
~CMDCheckConstraintGPDB() override;
// check constraint mdid
IMDId *
MDId() const override
{
return m_mdid;
}
// check constraint name
CMDName
Mdname() const override
{
return *m_mdname;
}
// mdid of the relation
IMDId *
GetRelMdId() const override
{
return m_rel_mdid;
}
// DXL string for check constraint
const CWStringDynamic *
GetStrRepr() const override
{
return m_dxl_str;
}
// the scalar expression of the check constraint
CExpression *GetCheckConstraintExpr(
CMemoryPool *mp, CMDAccessor *md_accessor,
CColRefArray *colref_array) const override;
// serialize MD check constraint in DXL format given a serializer object
void Serialize(gpdxl::CXMLSerializer *) const override;
#ifdef GPOS_DEBUG
// debug print of the MD check constraint
void DebugPrint(IOstream &os) const override;
#endif
};
} // namespace gpmd
#endif // !GPMD_CMDCheckConstraintGPDB_H
// EOF
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