greenplumn CName 源码
greenplumn CName 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/metadata/CName.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2009 Greenplum, Inc.
//
// @filename:
// CName.h
//
// @doc:
// Name abstraction for metadata names to keep optimizer
// agnostic of encodings etc.
//---------------------------------------------------------------------------
#ifndef GPOPT_CName_H
#define GPOPT_CName_H
#include "gpos/base.h"
#include "gpos/common/DbgPrintMixin.h"
#include "gpos/string/CWStringConst.h"
#define GPOPT_NAME_QUOTE_BEGIN "\""
#define GPOPT_NAME_QUOTE_END "\""
#define GPOPT_NAME_SEPARATOR GPOS_WSZ_LIT(".")
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CName
//
// @doc:
// Names consist of a null terminated wide character string;
// No assumptions about format and encoding; only semantics
// enforced is zero termination of string;
//
//---------------------------------------------------------------------------
class CName : public DbgPrintMixin<CName>
{
private:
// actual name
const CWStringConst *m_str_name;
// keep track of copy status
BOOL m_fDeepCopy;
// deep copy function
void DeepCopy(CMemoryPool *mp, const CWStringConst *str);
public:
// ctors
CName(CMemoryPool *, const CWStringBase *);
CName(const CWStringConst *, BOOL fOwnsMemory = false);
CName(const CName &);
CName(CMemoryPool *mp, const CName &);
CName(CMemoryPool *mp, const CName &, const CName &);
// dtor
~CName();
// accessors
const CWStringConst *
Pstr() const
{
return m_str_name;
}
ULONG
Length() const
{
return m_str_name->Length();
}
// comparison
BOOL Equals(const CName &) const;
// debug print
IOstream &OsPrint(IOstream &) const;
}; // class CName
} // namespace gpopt
#endif // !GPOPT_CName_H
// EOF
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