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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