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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