greenplumn CCostModelParamsGPDB 源码

2022-08-18
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greenplumn CCostModelParamsGPDB 代码

文件路径：/src/backend/gporca/libgpdbcost/src/CCostModelParamsGPDB.cpp

//---------------------------------------------------------------------------
//	Greenplum Database
//	Copyright (C) 2014 VMware, Inc. or its affiliates.
//
//	@filename:
//		CCostModelParamsGPDB.cpp
//
//	@doc:
//		Parameters of GPDB cost model
//---------------------------------------------------------------------------

#include "gpdbcost/CCostModelParamsGPDB.h"

#include "gpos/base.h"
#include "gpos/string/CWStringConst.h"

using namespace gpopt;

FORCE_GENERATE_DBGSTR(CCostModelParamsGPDB);

// sequential i/o bandwidth
const CDouble CCostModelParamsGPDB::DSeqIOBandwidthVal = 1024.0;

// random i/o bandwidth
const CDouble CCostModelParamsGPDB::DRandomIOBandwidthVal = 30.0;

// tuple processing bandwidth
const CDouble CCostModelParamsGPDB::DTupProcBandwidthVal = 512.0;

// output bandwidth
const CDouble CCostModelParamsGPDB::DOutputBandwidthVal = 256.0;

// scan initialization cost factor
const CDouble CCostModelParamsGPDB::DInitScanFacorVal = 431.0;

// table scan cost unit
const CDouble CCostModelParamsGPDB::DTableScanCostUnitVal = 5.50e-07;

// index scan initialization cost factor
const CDouble CCostModelParamsGPDB::DInitIndexScanFactorVal = 142.0;

// index block cost unit
const CDouble CCostModelParamsGPDB::DIndexBlockCostUnitVal = 1.27e-06;

// index filtering cost unit
const CDouble CCostModelParamsGPDB::DIndexFilterCostUnitVal = 1.65e-04;

// index scan cost unit per tuple per width
const CDouble CCostModelParamsGPDB::DIndexScanTupCostUnitVal = 3.66e-06;

// index scan random IO factor
const CDouble CCostModelParamsGPDB::DIndexScanTupRandomFactorVal = 6.0;

// filter column cost unit
const CDouble CCostModelParamsGPDB::DFilterColCostUnitVal = 3.29e-05;

// output tuple cost unit
const CDouble CCostModelParamsGPDB::DOutputTupCostUnitVal = 1.86e-06;

// sending tuple cost unit in gather motion
const CDouble CCostModelParamsGPDB::DGatherSendCostUnitVal = 4.58e-06;

// receiving tuple cost unit in gather motion
const CDouble CCostModelParamsGPDB::DGatherRecvCostUnitVal = 2.20e-06;

// sending tuple cost unit in redistribute motion
const CDouble CCostModelParamsGPDB::DRedistributeSendCostUnitVal = 2.33e-06;

// receiving tuple cost unit in redistribute motion
const CDouble CCostModelParamsGPDB::DRedistributeRecvCostUnitVal = 8.0e-07;

// sending tuple cost unit in broadcast motion
const CDouble CCostModelParamsGPDB::DBroadcastSendCostUnitVal = 4.965e-05;

// receiving tuple cost unit in broadcast motion
const CDouble CCostModelParamsGPDB::DBroadcastRecvCostUnitVal = 1.35e-06;

// tuple cost unit in No-Op motion
const CDouble CCostModelParamsGPDB::DNoOpCostUnitVal = 0;

// feeding cost per tuple per column in join operator
const CDouble CCostModelParamsGPDB::DJoinFeedingTupColumnCostUnitVal = 8.69e-05;

// feeding cost per tuple per width in join operator
const CDouble CCostModelParamsGPDB::DJoinFeedingTupWidthCostUnitVal = 6.09e-07;

// output cost per tuple in join operator
const CDouble CCostModelParamsGPDB::DJoinOutputTupCostUnitVal = 3.50e-06;

// memory threshold for hash join spilling (in bytes)
const CDouble CCostModelParamsGPDB::DHJSpillingMemThresholdVal =
	50 * 1024 * 1024;

// initial cost for building hash table for hash join
const CDouble CCostModelParamsGPDB::DHJHashTableInitCostFactorVal = 500.0;

// building hash table cost per tuple per column
const CDouble CCostModelParamsGPDB::DHJHashTableColumnCostUnitVal = 5.0e-05;

// the unit cost to process each tuple with unit width when building a hash table
const CDouble CCostModelParamsGPDB::DHJHashTableWidthCostUnitVal = 3.0e-06;

// hashing cost per tuple with unit width in hash join
const CDouble CCostModelParamsGPDB::DHJHashingTupWidthCostUnitVal = 1.97e-05;

// feeding cost per tuple per column in hash join if spilling
const CDouble CCostModelParamsGPDB::DHJFeedingTupColumnSpillingCostUnitVal =
	1.97e-04;

// feeding cost per tuple with unit width in hash join if spilling
const CDouble CCostModelParamsGPDB::DHJFeedingTupWidthSpillingCostUnitVal =
	3.0e-06;

// hashing cost per tuple with unit width in hash join if spilling
const CDouble CCostModelParamsGPDB::DHJHashingTupWidthSpillingCostUnitVal =
	2.30e-05;

// cost for building hash table for per tuple per grouping column in hash aggregate
const CDouble CCostModelParamsGPDB::DHashAggInputTupColumnCostUnitVal =
	1.20e-04;

// cost for building hash table for per tuple with unit width in hash aggregate
const CDouble CCostModelParamsGPDB::DHashAggInputTupWidthCostUnitVal = 1.12e-07;

// cost for outputting for per tuple with unit width in hash aggregate
const CDouble CCostModelParamsGPDB::DHashAggOutputTupWidthCostUnitVal =
	5.61e-07;

// sorting cost per tuple with unit width
const CDouble CCostModelParamsGPDB::DSortTupWidthCostUnitVal = 5.67e-06;

// cost for processing per tuple with unit width
const CDouble CCostModelParamsGPDB::DTupDefaultProcCostUnitVal = 1.0e-06;

// cost for materializing per tuple with unit width
const CDouble CCostModelParamsGPDB::DMaterializeCostUnitVal = 4.68e-06;

// tuple update bandwidth
const CDouble CCostModelParamsGPDB::DTupUpdateBandwidthVal = 256.0;

// network bandwidth
const CDouble CCostModelParamsGPDB::DNetBandwidthVal = 1024.0;

// number of segments
const CDouble CCostModelParamsGPDB::DSegmentsVal = 4.0;

// nlj factor
const CDouble CCostModelParamsGPDB::DNLJFactorVal = 1.0;

// hj factor
const CDouble CCostModelParamsGPDB::DHJFactorVal = 2.5;

// hash building factor
const CDouble CCostModelParamsGPDB::DHashFactorVal = 2.0;

// default cost
const CDouble CCostModelParamsGPDB::DDefaultCostVal = 100.0;

// largest estimation risk for which we don't penalize index join
const CDouble CCostModelParamsGPDB::DIndexJoinAllowedRiskThreshold = 3;

// default bitmap IO co-efficient when NDV is larger
const CDouble CCostModelParamsGPDB::DBitmapIOCostLargeNDV(0.0082);

// default bitmap IO co-efficient when NDV is smaller
const CDouble CCostModelParamsGPDB::DBitmapIOCostSmallNDV(0.2138);

// default bitmap page cost when NDV is larger
const CDouble CCostModelParamsGPDB::DBitmapPageCostLargeNDV(83.1651);

// default bitmap page cost when NDV is larger
const CDouble CCostModelParamsGPDB::DBitmapPageCostSmallNDV(204.3810);

// default bitmap page cost with no assumption about NDV
const CDouble CCostModelParamsGPDB::DBitmapPageCost(10);

// default threshold of NDV for bitmap costing
const CDouble CCostModelParamsGPDB::DBitmapNDVThreshold(200);

// cost of a bitmap scan rebind
const CDouble CCostModelParamsGPDB::DBitmapScanRebindCost(0.06);

// see CCostModelGPDB::CostHashJoin() for why this is needed
const CDouble CCostModelParamsGPDB::DPenalizeHJSkewUpperLimit(10.0);

// default scalar func cost
const CDouble CCostModelParamsGPDB::DScalarFuncCost(1.0e-04);

#define GPOPT_COSTPARAM_NAME_MAX_LENGTH 80

// parameter names in the same order of param enumeration
const CHAR rgszCostParamNames[CCostModelParamsGPDB::EcpSentinel]
							 [GPOPT_COSTPARAM_NAME_MAX_LENGTH] = {
								 "SeqIOBandwidth",
								 "RandomIOBandwidth",
								 "TupProcBandwidth",
								 "OutputBandwidth",
								 "InitScanFacor",
								 "TableScanCostUnit",
								 "InitIndexScanFactor",
								 "IndexBlockCostUnit",
								 "IndexFilterCostUnit",
								 "IndexScanTupCostUnit",
								 "IndexScanTupRandomFactor",
								 "FilterColCostUnit",
								 "OutputTupCostUnit",
								 "GatherSendCostUnit",
								 "GatherRecvCostUnit",
								 "RedistributeSendCostUnit",
								 "RedistributeRecvCostUnit",
								 "BroadcastSendCostUnit",
								 "BroadcastRecvCostUnit",
								 "NoOpCostUnit",
								 "JoinFeedingTupColumnCostUnit",
								 "JoinFeedingTupWidthCostUnit",
								 "JoinOutputTupCostUnit",
								 "HJSpillingMemThreshold",
								 "HJHashTableInitCostFactor",
								 "HJHashTableColumnCostUnit",
								 "HJHashTableWidthCostUnit",
								 "HJHashingTupWidthCostUnit",
								 "HJFeedingTupColumnSpillingCostUnit",
								 "HJFeedingTupWidthSpillingCostUnit",
								 "HJHashingTupWidthSpillingCostUnit",
								 "HashAggInputTupColumnCostUnit",
								 "HashAggInputTupWidthCostUnit",
								 "HashAggOutputTupWidthCostUnit",
								 "SortTupWidthCostUnit",
								 "TupDefaultProcCostUnit",
								 "MaterializeCostUnit",
								 "TupUpdateBandwidth",
								 "NetworkBandwidth",
								 "Segments",
								 "NLJFactor",
								 "HJFactor",
								 "HashFactor",
								 "DefaultCost",
								 "IndexJoinAllowedRiskThreshold",
								 "BitmapIOLargerNDV",
								 "BitmapIOSmallerNDV",
								 "BitmapPageCostLargerNDV",
								 "BitmapPageCostSmallerNDV",
								 "BitmapNDVThreshold",
								 "ScalarFuncCostUnit",
};

//---------------------------------------------------------------------------
//	@function:
//		CCostModelParamsGPDB::CCostModelParamsGPDB
//
//	@doc:
//		Ctor
//
//---------------------------------------------------------------------------
CCostModelParamsGPDB::CCostModelParamsGPDB(CMemoryPool *mp) : m_mp(mp)
{
	GPOS_ASSERT(nullptr != mp);

	for (ULONG ul = 0; ul < EcpSentinel; ul++)
	{
		m_rgpcp[ul] = nullptr;
	}

	// populate param array with default param values
	m_rgpcp[EcpSeqIOBandwidth] = GPOS_NEW(mp)
		SCostParam(EcpSeqIOBandwidth, DSeqIOBandwidthVal,
				   DSeqIOBandwidthVal - 128.0, DSeqIOBandwidthVal + 128.0);
	m_rgpcp[EcpRandomIOBandwidth] = GPOS_NEW(mp)
		SCostParam(EcpRandomIOBandwidth, DRandomIOBandwidthVal,
				   DRandomIOBandwidthVal - 8.0, DRandomIOBandwidthVal + 8.0);
	m_rgpcp[EcpTupProcBandwidth] = GPOS_NEW(mp)
		SCostParam(EcpTupProcBandwidth, DTupProcBandwidthVal,
				   DTupProcBandwidthVal - 32.0, DTupProcBandwidthVal + 32.0);
	m_rgpcp[EcpOutputBandwidth] = GPOS_NEW(mp)
		SCostParam(EcpOutputBandwidth, DOutputBandwidthVal,
				   DOutputBandwidthVal - 32.0, DOutputBandwidthVal + 32.0);
	m_rgpcp[EcpInitScanFactor] = GPOS_NEW(mp)
		SCostParam(EcpInitScanFactor, DInitScanFacorVal,
				   DInitScanFacorVal - 2.0, DInitScanFacorVal + 2.0);
	m_rgpcp[EcpTableScanCostUnit] = GPOS_NEW(mp)
		SCostParam(EcpTableScanCostUnit, DTableScanCostUnitVal,
				   DTableScanCostUnitVal - 1.0, DTableScanCostUnitVal + 1.0);
	m_rgpcp[EcpInitIndexScanFactor] = GPOS_NEW(mp) SCostParam(
		EcpInitIndexScanFactor, DInitIndexScanFactorVal,
		DInitIndexScanFactorVal - 1.0, DInitIndexScanFactorVal + 1.0);
	m_rgpcp[EcpIndexBlockCostUnit] = GPOS_NEW(mp)
		SCostParam(EcpIndexBlockCostUnit, DIndexBlockCostUnitVal,
				   DIndexBlockCostUnitVal - 1.0, DIndexBlockCostUnitVal + 1.0);
	m_rgpcp[EcpIndexFilterCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpIndexFilterCostUnit, DIndexFilterCostUnitVal,
		DIndexFilterCostUnitVal - 1.0, DIndexFilterCostUnitVal + 1.0);
	m_rgpcp[EcpIndexScanTupCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpIndexScanTupCostUnit, DIndexScanTupCostUnitVal,
		DIndexScanTupCostUnitVal - 1.0, DIndexScanTupCostUnitVal + 1.0);
	m_rgpcp[EcpIndexScanTupRandomFactor] = GPOS_NEW(mp) SCostParam(
		EcpIndexScanTupRandomFactor, DIndexScanTupRandomFactorVal,
		DIndexScanTupRandomFactorVal - 1.0, DIndexScanTupRandomFactorVal + 1.0);
	m_rgpcp[EcpFilterColCostUnit] = GPOS_NEW(mp)
		SCostParam(EcpFilterColCostUnit, DFilterColCostUnitVal,
				   DFilterColCostUnitVal - 1.0, DFilterColCostUnitVal + 1.0);
	m_rgpcp[EcpOutputTupCostUnit] = GPOS_NEW(mp)
		SCostParam(EcpOutputTupCostUnit, DOutputTupCostUnitVal,
				   DOutputTupCostUnitVal - 1.0, DOutputTupCostUnitVal + 1.0);
	m_rgpcp[EcpGatherSendCostUnit] = GPOS_NEW(mp)
		SCostParam(EcpGatherSendCostUnit, DGatherSendCostUnitVal,
				   DGatherSendCostUnitVal - 0.0, DGatherSendCostUnitVal + 0.0);
	m_rgpcp[EcpGatherRecvCostUnit] = GPOS_NEW(mp)
		SCostParam(EcpGatherRecvCostUnit, DGatherRecvCostUnitVal,
				   DGatherRecvCostUnitVal - 0.0, DGatherRecvCostUnitVal + 0.0);
	m_rgpcp[EcpRedistributeSendCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpRedistributeSendCostUnit, DRedistributeSendCostUnitVal,
		DRedistributeSendCostUnitVal - 0.0, DRedistributeSendCostUnitVal + 0.0);
	m_rgpcp[EcpRedistributeRecvCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpRedistributeRecvCostUnit, DRedistributeRecvCostUnitVal,
		DRedistributeRecvCostUnitVal - 0.0, DRedistributeRecvCostUnitVal + 0.0);
	m_rgpcp[EcpBroadcastSendCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpBroadcastSendCostUnit, DBroadcastSendCostUnitVal,
		DBroadcastSendCostUnitVal - 0.0, DBroadcastSendCostUnitVal + 0.0);
	m_rgpcp[EcpBroadcastRecvCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpBroadcastRecvCostUnit, DBroadcastRecvCostUnitVal,
		DBroadcastRecvCostUnitVal - 0.0, DBroadcastRecvCostUnitVal + 0.0);
	m_rgpcp[EcpNoOpCostUnit] =
		GPOS_NEW(mp) SCostParam(EcpNoOpCostUnit, DNoOpCostUnitVal,
								DNoOpCostUnitVal - 0.0, DNoOpCostUnitVal + 0.0);
	m_rgpcp[EcpJoinFeedingTupColumnCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpJoinFeedingTupColumnCostUnit, DJoinFeedingTupColumnCostUnitVal,
		DJoinFeedingTupColumnCostUnitVal - 0.0,
		DJoinFeedingTupColumnCostUnitVal + 0.0);
	m_rgpcp[EcpJoinFeedingTupWidthCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpJoinFeedingTupWidthCostUnit, DJoinFeedingTupWidthCostUnitVal,
		DJoinFeedingTupWidthCostUnitVal - 0.0,
		DJoinFeedingTupWidthCostUnitVal + 0.0);
	m_rgpcp[EcpJoinOutputTupCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpJoinOutputTupCostUnit, DJoinOutputTupCostUnitVal,
		DJoinOutputTupCostUnitVal - 0.0, DJoinOutputTupCostUnitVal + 0.0);
	m_rgpcp[EcpHJSpillingMemThreshold] = GPOS_NEW(mp) SCostParam(
		EcpHJSpillingMemThreshold, DHJSpillingMemThresholdVal,
		DHJSpillingMemThresholdVal - 0.0, DHJSpillingMemThresholdVal + 0.0);
	m_rgpcp[EcpHJHashTableInitCostFactor] = GPOS_NEW(mp)
		SCostParam(EcpHJHashTableInitCostFactor, DHJHashTableInitCostFactorVal,
				   DHJHashTableInitCostFactorVal - 0.0,
				   DHJHashTableInitCostFactorVal + 0.0);
	m_rgpcp[EcpHJHashTableColumnCostUnit] = GPOS_NEW(mp)
		SCostParam(EcpHJHashTableColumnCostUnit, DHJHashTableColumnCostUnitVal,
				   DHJHashTableColumnCostUnitVal - 0.0,
				   DHJHashTableColumnCostUnitVal + 0.0);
	m_rgpcp[EcpHJHashTableWidthCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpHJHashTableWidthCostUnit, DHJHashTableWidthCostUnitVal,
		DHJHashTableWidthCostUnitVal - 0.0, DHJHashTableWidthCostUnitVal + 0.0);
	m_rgpcp[EcpHJHashingTupWidthCostUnit] = GPOS_NEW(mp)
		SCostParam(EcpHJHashingTupWidthCostUnit, DHJHashingTupWidthCostUnitVal,
				   DHJHashingTupWidthCostUnitVal - 0.0,
				   DHJHashingTupWidthCostUnitVal + 0.0);
	m_rgpcp[EcpHJFeedingTupColumnSpillingCostUnit] =
		GPOS_NEW(mp) SCostParam(EcpHJFeedingTupColumnSpillingCostUnit,
								DHJFeedingTupColumnSpillingCostUnitVal,
								DHJFeedingTupColumnSpillingCostUnitVal - 0.0,
								DHJFeedingTupColumnSpillingCostUnitVal + 0.0);
	m_rgpcp[EcpHJFeedingTupWidthSpillingCostUnit] =
		GPOS_NEW(mp) SCostParam(EcpHJFeedingTupWidthSpillingCostUnit,
								DHJFeedingTupWidthSpillingCostUnitVal,
								DHJFeedingTupWidthSpillingCostUnitVal - 0.0,
								DHJFeedingTupWidthSpillingCostUnitVal + 0.0);
	m_rgpcp[EcpHJHashingTupWidthSpillingCostUnit] =
		GPOS_NEW(mp) SCostParam(EcpHJHashingTupWidthSpillingCostUnit,
								DHJHashingTupWidthSpillingCostUnitVal,
								DHJHashingTupWidthSpillingCostUnitVal - 0.0,
								DHJHashingTupWidthSpillingCostUnitVal + 0.0);
	m_rgpcp[EcpHashAggInputTupColumnCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpHashAggInputTupColumnCostUnit, DHashAggInputTupColumnCostUnitVal,
		DHashAggInputTupColumnCostUnitVal - 0.0,
		DHashAggInputTupColumnCostUnitVal + 0.0);
	m_rgpcp[EcpHashAggInputTupWidthCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpHashAggInputTupWidthCostUnit, DHashAggInputTupWidthCostUnitVal,
		DHashAggInputTupWidthCostUnitVal - 0.0,
		DHashAggInputTupWidthCostUnitVal + 0.0);
	m_rgpcp[EcpHashAggOutputTupWidthCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpHashAggOutputTupWidthCostUnit, DHashAggOutputTupWidthCostUnitVal,
		DHashAggOutputTupWidthCostUnitVal - 0.0,
		DHashAggOutputTupWidthCostUnitVal + 0.0);
	m_rgpcp[EcpSortTupWidthCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpSortTupWidthCostUnit, DSortTupWidthCostUnitVal,
		DSortTupWidthCostUnitVal - 0.0, DSortTupWidthCostUnitVal + 0.0);
	m_rgpcp[EcpTupDefaultProcCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpTupDefaultProcCostUnit, DTupDefaultProcCostUnitVal,
		DTupDefaultProcCostUnitVal - 0.0, DTupDefaultProcCostUnitVal + 0.0);
	m_rgpcp[EcpMaterializeCostUnit] = GPOS_NEW(mp) SCostParam(
		EcpMaterializeCostUnit, DMaterializeCostUnitVal,
		DMaterializeCostUnitVal - 0.0, DMaterializeCostUnitVal + 0.0);
	m_rgpcp[EcpTupUpdateBandwith] = GPOS_NEW(mp) SCostParam(
		EcpTupUpdateBandwith, DTupUpdateBandwidthVal,
		DTupUpdateBandwidthVal - 32.0, DTupUpdateBandwidthVal + 32.0);
	m_rgpcp[EcpNetBandwidth] = GPOS_NEW(mp)
		SCostParam(EcpNetBandwidth, DNetBandwidthVal, DNetBandwidthVal - 128.0,
				   DNetBandwidthVal + 128.0);
	m_rgpcp[EcpSegments] = GPOS_NEW(mp) SCostParam(
		EcpSegments, DSegmentsVal, DSegmentsVal - 2.0, DSegmentsVal + 2.0);
	m_rgpcp[EcpNLJFactor] = GPOS_NEW(mp) SCostParam(
		EcpNLJFactor, DNLJFactorVal, DNLJFactorVal - 0.5, DNLJFactorVal + 0.5);
	m_rgpcp[EcpHJFactor] = GPOS_NEW(mp) SCostParam(
		EcpHJFactor, DHJFactorVal, DHJFactorVal - 1.0, DHJFactorVal + 1.0);
	m_rgpcp[EcpHashFactor] =
		GPOS_NEW(mp) SCostParam(EcpHashFactor, DHashFactorVal,
								DHashFactorVal - 1.0, DHashFactorVal + 1.0);
	m_rgpcp[EcpDefaultCost] =
		GPOS_NEW(mp) SCostParam(EcpDefaultCost, DDefaultCostVal,
								DDefaultCostVal - 32.0, DDefaultCostVal + 32.0);
	m_rgpcp[EcpIndexJoinAllowedRiskThreshold] = GPOS_NEW(mp)
		SCostParam(EcpIndexJoinAllowedRiskThreshold,
				   DIndexJoinAllowedRiskThreshold, 0, gpos::ulong_max);
	m_rgpcp[EcpBitmapIOCostLargeNDV] = GPOS_NEW(mp) SCostParam(
		EcpBitmapIOCostLargeNDV, DBitmapIOCostLargeNDV,
		DBitmapIOCostLargeNDV - 0.0001, DBitmapIOCostLargeNDV + 0.0001);
	m_rgpcp[EcpBitmapIOCostSmallNDV] = GPOS_NEW(mp) SCostParam(
		EcpBitmapIOCostSmallNDV, DBitmapIOCostSmallNDV,
		DBitmapIOCostSmallNDV - 0.0001, DBitmapIOCostSmallNDV + 0.0001);
	m_rgpcp[EcpBitmapPageCostLargeNDV] = GPOS_NEW(mp) SCostParam(
		EcpBitmapPageCostLargeNDV, DBitmapPageCostLargeNDV,
		DBitmapPageCostLargeNDV - 1.0, DBitmapPageCostLargeNDV + 1.0);
	m_rgpcp[EcpBitmapPageCostSmallNDV] = GPOS_NEW(mp) SCostParam(
		EcpBitmapPageCostSmallNDV, DBitmapPageCostSmallNDV,
		DBitmapPageCostSmallNDV - 1.0, DBitmapPageCostSmallNDV + 1.0);
	m_rgpcp[EcpBitmapPageCost] =
		GPOS_NEW(mp) SCostParam(EcpBitmapPageCost, DBitmapPageCost,
								DBitmapPageCost - 1.0, DBitmapPageCost + 1.0);
	m_rgpcp[EcpBitmapNDVThreshold] = GPOS_NEW(mp)
		SCostParam(EcpBitmapNDVThreshold, DBitmapNDVThreshold,
				   DBitmapNDVThreshold - 1.0, DBitmapNDVThreshold + 1.0);
	m_rgpcp[EcpBitmapScanRebindCost] = GPOS_NEW(mp)
		SCostParam(EcpBitmapScanRebindCost, DBitmapScanRebindCost,
				   DBitmapScanRebindCost - 1.0, DBitmapScanRebindCost + 1.0);
	m_rgpcp[EcpPenalizeHJSkewUpperLimit] = GPOS_NEW(mp) SCostParam(
		EcpPenalizeHJSkewUpperLimit, DPenalizeHJSkewUpperLimit,
		DPenalizeHJSkewUpperLimit - 1.0, DPenalizeHJSkewUpperLimit + 1.0);

	m_rgpcp[EcpScalarFuncCost] =
		GPOS_NEW(mp) SCostParam(EcpScalarFuncCost, DScalarFuncCost,
								DScalarFuncCost - 0.0, DScalarFuncCost + 0.0);
}


//---------------------------------------------------------------------------
//	@function:
//		CCostModelParamsGPDB::~CCostModelParamsGPDB
//
//	@doc:
//		Dtor
//
//---------------------------------------------------------------------------
CCostModelParamsGPDB::~CCostModelParamsGPDB()
{
	for (ULONG ul = 0; ul < EcpSentinel; ul++)
	{
		GPOS_DELETE(m_rgpcp[ul]);
		m_rgpcp[ul] = nullptr;
	}
}


//---------------------------------------------------------------------------
//	@function:
//		CCostModelParamsGPDB::PcpLookup
//
//	@doc:
//		Lookup param by id;
//
//
//---------------------------------------------------------------------------
CCostModelParamsGPDB::SCostParam *
CCostModelParamsGPDB::PcpLookup(ULONG id) const
{
	ECostParam ecp = (ECostParam) id;
	GPOS_ASSERT(EcpSentinel > ecp);

	return m_rgpcp[ecp];
}


//---------------------------------------------------------------------------
//	@function:
//		CCostModelParamsGPDB::PcpLookup
//
//	@doc:
//		Lookup param by name;
//		return NULL if name is not recognized
//
//---------------------------------------------------------------------------
CCostModelParamsGPDB::SCostParam *
CCostModelParamsGPDB::PcpLookup(const CHAR *szName) const
{
	GPOS_ASSERT(nullptr != szName);

	for (ULONG ul = 0; ul < EcpSentinel; ul++)
	{
		if (0 == clib::Strcmp(szName, rgszCostParamNames[ul]))
		{
			return PcpLookup((ECostParam) ul);
		}
	}

	return nullptr;
}


//---------------------------------------------------------------------------
//	@function:
//		CCostModelParamsGPDB::SetParam
//
//	@doc:
//		Set param by id
//
//---------------------------------------------------------------------------
void
CCostModelParamsGPDB::SetParam(ULONG id, CDouble dVal, CDouble dLowerBound,
							   CDouble dUpperBound)
{
	ECostParam ecp = (ECostParam) id;
	GPOS_ASSERT(EcpSentinel > ecp);

	GPOS_DELETE(m_rgpcp[ecp]);
	m_rgpcp[ecp] = nullptr;
	m_rgpcp[ecp] =
		GPOS_NEW(m_mp) SCostParam(ecp, dVal, dLowerBound, dUpperBound);
}


//---------------------------------------------------------------------------
//	@function:
//		CCostModelParamsGPDB::SetParam
//
//	@doc:
//		Set param by name
//
//---------------------------------------------------------------------------
void
CCostModelParamsGPDB::SetParam(const CHAR *szName, CDouble dVal,
							   CDouble dLowerBound, CDouble dUpperBound)
{
	GPOS_ASSERT(nullptr != szName);

	for (ULONG ul = 0; ul < EcpSentinel; ul++)
	{
		if (0 == clib::Strcmp(szName, rgszCostParamNames[ul]))
		{
			GPOS_DELETE(m_rgpcp[ul]);
			m_rgpcp[ul] = nullptr;
			m_rgpcp[ul] =
				GPOS_NEW(m_mp) SCostParam(ul, dVal, dLowerBound, dUpperBound);

			return;
		}
	}
}


//---------------------------------------------------------------------------
//	@function:
//		CCostModelParamsGPDB::OsPrint
//
//	@doc:
//		Print function
//
//---------------------------------------------------------------------------
IOstream &
CCostModelParamsGPDB::OsPrint(IOstream &os) const
{
	for (ULONG ul = 0; ul < EcpSentinel; ul++)
	{
		SCostParam *pcp = PcpLookup((ECostParam) ul);
		os << rgszCostParamNames[ul] << " : " << pcp->Get() << "  ["
		   << pcp->GetLowerBoundVal() << "," << pcp->GetUpperBoundVal() << "]"
		   << std::endl;
	}
	return os;
}

BOOL
CCostModelParamsGPDB::Equals(ICostModelParams *pcm) const
{
	CCostModelParamsGPDB *pcmgOther = dynamic_cast<CCostModelParamsGPDB *>(pcm);
	if (nullptr == pcmgOther)
	{
		return false;
	}

	for (ULONG ul = 0U; ul < GPOS_ARRAY_SIZE(m_rgpcp); ul++)
	{
		if (!m_rgpcp[ul]->Equals(pcmgOther->m_rgpcp[ul]))
		{
			return false;
		}
	}

	return true;
}

const CHAR *
CCostModelParamsGPDB::SzNameLookup(ULONG id) const
{
	ECostParam ecp = (ECostParam) id;
	GPOS_ASSERT(EcpSentinel > ecp);
	return rgszCostParamNames[ecp];
}

// EOF

相关信息

greenplumn 源码目录

相关文章

greenplumn CCostModelGPDB 源码

greenplumn ICostModel 源码

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所属分类： 大数据
本文标签： greenplum
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