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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