greenplumn CColumnDescriptor 代码
文件路径：/src/backend/gporca/libgpopt/src/metadata/CColumnDescriptor.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2009 Greenplum, Inc.
/
/ @filename:
/ CColumnDescriptor.cpp
/
/ @doc:
/ Column abstraction for tables, functions, external tables etc.
/---------------------------------------------------------------------------
#include "gpopt/metadata/CColumnDescriptor.h"
#include "gpos/base.h"
#include "naucrates/md/CMDIdGPDB.h"
using namespace gpopt;
using namespace gpmd;
FORCE_GENERATE_DBGSTR(CColumnDescriptor);
/---------------------------------------------------------------------------
/ @function:
/ CColumnDescriptor::CColumnDescriptor
/
/ @doc:
/ Ctor
/
/---------------------------------------------------------------------------
CColumnDescriptor::CColumnDescriptor(CMemoryPool *mp, const IMDType *pmdtype,
INT type_modifier, const CName &name,
INT attno, BOOL is_nullable, ULONG ulWidth)
: m_pmdtype(pmdtype),
m_type_modifier(type_modifier),
m_name(mp, name),
m_iAttno(attno),
m_is_nullable(is_nullable),
m_width(ulWidth),
m_is_dist_col(false)
{
GPOS_ASSERT(nullptr != pmdtype);
GPOS_ASSERT(pmdtype->MDId()->IsValid());
if (m_pmdtype->IsFixedLength())
{
ulWidth = m_pmdtype->Length();
}
}
/---------------------------------------------------------------------------
/ @function:
/ CColumnDescriptor::~CColumnDescriptor
/
/ @doc:
/ Dtor
/
/---------------------------------------------------------------------------
CColumnDescriptor::~CColumnDescriptor() = default;
/---------------------------------------------------------------------------
/ @function:
/ CColumnDescriptor::OsPrint
/
/ @doc:
/ debug print
/
/---------------------------------------------------------------------------
IOstream &
CColumnDescriptor::OsPrint(IOstream &os) const
{
return m_name.OsPrint(os);
}
/ EOF