greenplumn CDatumBoolGPDB 源码
greenplumn CDatumBoolGPDB 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/base/CDatumBoolGPDB.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 EMC Corp.
//
// @filename:
// CDatumBoolGPDB.h
//
// @doc:
// GPDB-specific bool representation
//---------------------------------------------------------------------------
#ifndef GPNAUCRATES_CDatumBoolGPDB_H
#define GPNAUCRATES_CDatumBoolGPDB_H
#include "gpos/base.h"
#include "naucrates/base/IDatumBool.h"
#include "naucrates/md/CMDTypeBoolGPDB.h"
namespace gpnaucrates
{
//---------------------------------------------------------------------------
// @class:
// CDatumBoolGPDB
//
// @doc:
// GPDB-specific bool representation
//
//---------------------------------------------------------------------------
class CDatumBoolGPDB : public IDatumBool
{
private:
// type information
IMDId *m_mdid;
// boolean value
BOOL m_value;
// is null
BOOL m_is_null;
public:
CDatumBoolGPDB(const CDatumBoolGPDB &) = delete;
// ctors
CDatumBoolGPDB(CSystemId sysid, BOOL value, BOOL is_null = false);
CDatumBoolGPDB(IMDId *mdid, BOOL value, BOOL is_null = false);
// dtor
~CDatumBoolGPDB() override;
// accessor of metadata type mdid
IMDId *MDId() const override;
// accessor of boolean value
BOOL GetValue() const override;
// accessor of size
ULONG Size() const override;
// accessor of is null
BOOL IsNull() const override;
// return string representation
const CWStringConst *GetStrRepr(CMemoryPool *mp) const override;
// hash function
ULONG HashValue() const override;
// match function for datums
BOOL Matches(const IDatum *) const override;
// copy datum
IDatum *MakeCopy(CMemoryPool *mp) const override;
// print function
IOstream &OsPrint(IOstream &os) const override;
}; // class CDatumBoolGPDB
} // namespace gpnaucrates
#endif // !GPNAUCRATES_CDatumBoolGPDB_H
// EOF
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