greenplumn CDistributionSpecStrictSingleton 源码
greenplumn CDistributionSpecStrictSingleton 代码
文件路径：/src/backend/gporca/libgpopt/src/base/CDistributionSpecStrictSingleton.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2013 EMC Corp.
//
// @filename:
// CDistributionSpecStrictSingleton.cpp
//
// @doc:
// Specification of strict singleton distribution
//---------------------------------------------------------------------------
#include "gpopt/base/CDistributionSpecStrictSingleton.h"
using namespace gpopt;
//---------------------------------------------------------------------------
// @function:
// CDistributionSpecStrictSingleton::CDistributionSpecStrictSingleton
//
// @doc:
// Ctor
//
//---------------------------------------------------------------------------
CDistributionSpecStrictSingleton::CDistributionSpecStrictSingleton(
ESegmentType est)
: CDistributionSpecSingleton(est)
{
}
//---------------------------------------------------------------------------
// @function:
// CDistributionSpecStrictSingleton::FSatisfies
//
// @doc:
// Check if this distribution spec satisfies the given one
//
//---------------------------------------------------------------------------
BOOL
CDistributionSpecStrictSingleton::FSatisfies(
const CDistributionSpec *pdss) const
{
if (Matches(pdss))
{
// exact match implies satisfaction
return true;
}
if (EdtNonSingleton == pdss->Edt())
{
// singleton does not satisfy non-singleton requirements
return false;
}
if (EdtAny == pdss->Edt())
{
// a singleton distribution satisfies "any"
return true;
}
return (
(EdtSingleton == pdss->Edt() || EdtStrictSingleton == pdss->Edt()) &&
m_est == static_cast<const CDistributionSpecSingleton *>(pdss)->Est());
}
//---------------------------------------------------------------------------
// @function:
// CDistributionSpecStrictSingleton::OsPrint
//
// @doc:
// Print function
//
//---------------------------------------------------------------------------
IOstream &
CDistributionSpecStrictSingleton::OsPrint(IOstream &os) const
{
return os << "STRICT SINGLETON (" << m_szSegmentType[m_est] << ")";
}
// EOF
相关信息
相关文章
greenplumn CColConstraintsArrayMapper 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦