greenplumn CMDName 源码
greenplumn CMDName 代码
文件路径：/src/backend/gporca/libnaucrates/src/md/CMDName.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 Greenplum, Inc.
//
// @filename:
// CMDName.cpp
//
// @doc:
// Metadata name of objects
//---------------------------------------------------------------------------
#include "naucrates/md/CMDName.h"
#include "gpos/base.h"
#include "gpos/string/CWStringDynamic.h"
using namespace gpmd;
//---------------------------------------------------------------------------
// @function:
// CMDName::CMDName
//
// @doc:
// Constructor
// Creates a deep copy of the provided string
//
//---------------------------------------------------------------------------
CMDName::CMDName(CMemoryPool *mp, const CWStringBase *str)
: m_name(nullptr), m_deep_copy(true)
{
m_name = GPOS_NEW(mp) CWStringConst(mp, str->GetBuffer());
}
//---------------------------------------------------------------------------
// @function:
// CMDName::CMDName
//
// @doc:
// ctor
// Depending on the value of the the owns_memory argument, the string object
// can become property of the CMDName object
//
//---------------------------------------------------------------------------
CMDName::CMDName(const CWStringConst *str, BOOL owns_memory)
: m_name(str), m_deep_copy(owns_memory)
{
GPOS_ASSERT(nullptr != m_name);
GPOS_ASSERT(m_name->IsValid());
}
//---------------------------------------------------------------------------
// @function:
// CMDName::CMDName
//
// @doc:
// Shallow copy constructor
//
//---------------------------------------------------------------------------
CMDName::CMDName(const CMDName &name)
: m_name(name.GetMDName()), m_deep_copy(false)
{
GPOS_ASSERT(nullptr != m_name->GetBuffer());
GPOS_ASSERT(m_name->IsValid());
}
//---------------------------------------------------------------------------
// @function:
// CMDName::~CMDName
//
// @doc:
// dtor
//
//---------------------------------------------------------------------------
CMDName::~CMDName()
{
GPOS_ASSERT(m_name->IsValid());
if (m_deep_copy)
{
GPOS_DELETE(m_name);
}
}
// EOF
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