greenplumn CDatumInt8GPDB 源码
greenplumn CDatumInt8GPDB 代码
文件路径：/src/backend/gporca/libnaucrates/include/naucrates/base/CDatumInt8GPDB.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2012 EMC Corp.
//
// @filename:
// CDatumInt8GPDB.h
//
// @doc:
// GPDB-specific Int8 representation
//---------------------------------------------------------------------------
#ifndef GPNAUCRATES_CDatumInt8GPDB_H
#define GPNAUCRATES_CDatumInt8GPDB_H
#include "gpos/base.h"
#include "naucrates/base/IDatumInt8.h"
#include "naucrates/md/CMDTypeInt8GPDB.h"
namespace gpnaucrates
{
//---------------------------------------------------------------------------
// @class:
// CDatumInt8GPDB
//
// @doc:
// GPDB-specific Int8 representation
//
//---------------------------------------------------------------------------
class CDatumInt8GPDB : public IDatumInt8
{
private:
// type information
IMDId *m_mdid;
// integer value
LINT m_val;
// is null
BOOL m_is_null;
public:
CDatumInt8GPDB(const CDatumInt8GPDB &) = delete;
// ctors
CDatumInt8GPDB(CSystemId sysid, LINT val, BOOL is_null = false);
CDatumInt8GPDB(IMDId *mdid, LINT val, BOOL is_null = false);
// dtor
~CDatumInt8GPDB() override;
// accessor of metadata type id
IMDId *MDId() const override;
// accessor of size
ULONG Size() const override;
// accessor of integer value
LINT Value() 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 CDatumInt8GPDB
} // namespace gpnaucrates
#endif // !GPNAUCRATES_CDatumInt8GPDB_H
// EOF
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