greenplumn COptimizerConfig 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/optimizer/COptimizerConfig.h
/---------------------------------------------------------------------------
/ Greenplum Database
/ Copyright (C) 2018 VMware, Inc. or its affiliates.
/
/ @filename:
/ COptimizerConfig.h
/
/ @doc:
/ Configurations used by the optimizer
/---------------------------------------------------------------------------
#ifndef GPOPT_COptimizerConfig_H
#define GPOPT_COptimizerConfig_H
#include "gpos/base.h"
#include "gpos/common/CDynamicPtrArray.h"
#include "gpos/common/CRefCount.h"
#include "gpopt/base/CWindowOids.h"
#include "gpopt/engine/CCTEConfig.h"
#include "gpopt/engine/CEnumeratorConfig.h"
#include "gpopt/engine/CHint.h"
#include "gpopt/engine/CStatisticsConfig.h"
namespace gpopt
{
using namespace gpos;
/ forward decl
class ICostModel;
/---------------------------------------------------------------------------
/ @class:
/ COptimizerConfig
/
/ @doc:
/ Configuration parameters of the optimizer including damping factors used
/ during statistics derivation, CTE inlining cut-off threshold, Id of plan to
/ be extracted (if plan enumeration is enabled), number of plans to be sampled
/ from the space (if plan sampling is enabled) etc.
/
/ Most of these configurations can be changed from outside ORCA through
/ GUCs. They are also included in optimizer’s minidumps under
/ <dxl:OptimizerConfig> element
/
/---------------------------------------------------------------------------
class COptimizerConfig : public CRefCount
{
private:
/ plan enumeration configuration
CEnumeratorConfig *m_enumerator_cfg;
/ statistics configuration
CStatisticsConfig *m_stats_conf;
/ CTE configuration
CCTEConfig *m_cte_conf;
/ cost model configuration
ICostModel *m_cost_model;
/ hint configuration
CHint *m_hint;
/ default window oids
CWindowOids *m_window_oids;
public:
/ ctor
COptimizerConfig(CEnumeratorConfig *pec, CStatisticsConfig *stats_config,
CCTEConfig *pcteconf, ICostModel *pcm, CHint *phint,
CWindowOids *pdefoidsGPDB);
/ dtor
~COptimizerConfig() override;
/ plan enumeration configuration
CEnumeratorConfig *
GetEnumeratorCfg() const
{
return m_enumerator_cfg;
}
/ statistics configuration
CStatisticsConfig *
GetStatsConf() const
{
return m_stats_conf;
}
/ CTE configuration
CCTEConfig *
GetCteConf() const
{
return m_cte_conf;
}
/ cost model configuration
ICostModel *
GetCostModel() const
{
return m_cost_model;
}
/ default window oids
CWindowOids *
GetWindowOids() const
{
return m_window_oids;
}
/ hint configuration
CHint *
GetHint() const
{
return m_hint;
}
/ generate default optimizer configurations
static COptimizerConfig *PoconfDefault(CMemoryPool *mp);
/ generate default optimizer configurations with the given cost model
static COptimizerConfig *PoconfDefault(CMemoryPool *mp, ICostModel *pcm);
void Serialize(CMemoryPool *mp, CXMLSerializer *xml_serializer,
CBitSet *pbsTrace) const;
}; / class COptimizerConfig
} / namespace gpopt
#endif / !GPOPT_COptimizerConfig_H
/ EOF