greenplumn CAutoOptCtxt 代码
文件路径：/src/backend/gporca/libgpopt/src/base/CAutoOptCtxt.cpp
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2009 Greenplum, Inc.
/
/ @filename:
/ CAutoOptCtxt.cpp
/
/ @doc:
/ Implementation of auto opt context
/---------------------------------------------------------------------------
#include "gpopt/base/CAutoOptCtxt.h"
#include "gpos/base.h"
#include "gpopt/cost/ICostModel.h"
#include "gpopt/eval/CConstExprEvaluatorDefault.h"
#include "gpopt/optimizer/COptimizerConfig.h"
using namespace gpopt;
/---------------------------------------------------------------------------
/ @function:
/ CAutoOptCtxt::CAutoOptCtxt
/
/ @doc:
/ ctor
/ Create and install default optimizer context
/
/---------------------------------------------------------------------------
CAutoOptCtxt::CAutoOptCtxt(CMemoryPool *mp, CMDAccessor *md_accessor,
IConstExprEvaluator *pceeval,
COptimizerConfig *optimizer_config)
{
if (nullptr == optimizer_config)
{
/ create default statistics configuration
optimizer_config = COptimizerConfig::PoconfDefault(mp);
}
if (nullptr == pceeval)
{
/ use the default constant expression evaluator which cannot evaluate any expression
pceeval = GPOS_NEW(mp) CConstExprEvaluatorDefault();
}
COptCtxt *poctxt =
COptCtxt::PoctxtCreate(mp, md_accessor, pceeval, optimizer_config);
ITask::Self()->GetTls().Store(poctxt);
}
/---------------------------------------------------------------------------
/ @function:
/ CAutoOptCtxt::CAutoOptCtxt
/
/ @doc:
/ ctor
/ Create and install default optimizer context with the given cost model
/
/---------------------------------------------------------------------------
CAutoOptCtxt::CAutoOptCtxt(CMemoryPool *mp, CMDAccessor *md_accessor,
IConstExprEvaluator *pceeval, ICostModel *pcm)
{
GPOS_ASSERT(nullptr != pcm);
/ create default statistics configuration
COptimizerConfig *optimizer_config =
COptimizerConfig::PoconfDefault(mp, pcm);
if (nullptr == pceeval)
{
/ use the default constant expression evaluator which cannot evaluate any expression
pceeval = GPOS_NEW(mp) CConstExprEvaluatorDefault();
}
COptCtxt *poctxt =
COptCtxt::PoctxtCreate(mp, md_accessor, pceeval, optimizer_config);
ITask::Self()->GetTls().Store(poctxt);
}
/---------------------------------------------------------------------------
/ @function:
/ CAutoOptCtxt::~CAutoOptCtxt
/
/ @doc:
/ dtor
/ uninstall optimizer context and destroy
/
/---------------------------------------------------------------------------
CAutoOptCtxt::~CAutoOptCtxt()
{
CTaskLocalStorageObject *ptlsobj =
ITask::Self()->GetTls().Get(CTaskLocalStorage::EtlsidxOptCtxt);
ITask::Self()->GetTls().Remove(ptlsobj);
GPOS_DELETE(ptlsobj);
}
/ EOF
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