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CCostModelParamsGPDBLegacy.cpp
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CCostModelParamsGPDBLegacy.cpp
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//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2014 Pivotal Inc.
//
// @filename:
// CCostModelParamsGPDBLegacy.cpp
//
// @doc:
// Parameters of GPDB's legacy cost model
//---------------------------------------------------------------------------
#include "gpdbcost/CCostModelParamsGPDBLegacy.h"
using namespace gpopt;
// sequential i/o bandwidth
const CDouble CCostModelParamsGPDBLegacy::DSeqIOBandwidthVal = 1024.0;
// random i/o bandwidth
const CDouble CCostModelParamsGPDBLegacy::DRandomIOBandwidthVal = 30.0;
// tuple processing bandwidth
const CDouble CCostModelParamsGPDBLegacy::DTupProcBandwidthVal = 512.0;
// tuple update bandwidth
const CDouble CCostModelParamsGPDBLegacy::DTupUpdateBandwidthVal = 256.0;
// network bandwidth
const CDouble CCostModelParamsGPDBLegacy::DNetBandwidthVal = 1024.0;
// number of segments
const CDouble CCostModelParamsGPDBLegacy::DSegmentsVal = 4.0;
// nlj outer factor
const CDouble CCostModelParamsGPDBLegacy::DNLJOuterFactorVal = 1024.0;
// nlj factor
const CDouble CCostModelParamsGPDBLegacy::DNLJFactorVal = 1.0;
// hj factor
const CDouble CCostModelParamsGPDBLegacy::DHJFactorVal = 2.5;
// hash building factor
const CDouble CCostModelParamsGPDBLegacy::DHashFactorVal = 2.0;
// default cost
const CDouble CCostModelParamsGPDBLegacy::DDefaultCostVal = 100.0;
#include "gpos/base.h"
#include "gpos/string/CWStringConst.h"
#define GPOPT_COSTPARAM_NAME_MAX_LENGTH 80
// parameter names in the same order of param enumeration
const CHAR rgszCostParamNames[CCostModelParamsGPDBLegacy::EcpSentinel][GPOPT_COSTPARAM_NAME_MAX_LENGTH] =
{
"SeqIOBandwidth",
"RandomIOBandwidth",
"TupProcBandwidth",
"TupUpdateBandwidth",
"NetworkBandwidth",
"Segments",
"NLJOuterFactor",
"NLJFactor",
"HJFactor",
"HashFactor",
"DefaultCost",
};
//---------------------------------------------------------------------------
// @function:
// CCostModelParamsGPDBLegacy::CCostModelParamsGPDBLegacy
//
// @doc:
// Ctor
//
//---------------------------------------------------------------------------
CCostModelParamsGPDBLegacy::CCostModelParamsGPDBLegacy
(
IMemoryPool *pmp
)
:
m_pmp(pmp)
{
GPOS_ASSERT(NULL != pmp);
for (ULONG ul = 0; ul < EcpSentinel; ul++)
{
m_rgpcp[ul] = NULL;
}
// populate param array with default param values
m_rgpcp[EcpSeqIOBandwidth] = GPOS_NEW(pmp) SCostParam(EcpSeqIOBandwidth, DSeqIOBandwidthVal, DSeqIOBandwidthVal - 128.0, DSeqIOBandwidthVal + 128.0);
m_rgpcp[EcpRandomIOBandwidth] = GPOS_NEW(pmp) SCostParam(EcpRandomIOBandwidth, DRandomIOBandwidthVal, DRandomIOBandwidthVal - 8.0, DRandomIOBandwidthVal + 8.0);
m_rgpcp[EcpTupProcBandwidth] = GPOS_NEW(pmp) SCostParam(EcpTupProcBandwidth, DTupProcBandwidthVal, DTupProcBandwidthVal - 32.0, DTupProcBandwidthVal + 32.0);
m_rgpcp[EcpTupUpdateBandwith] = GPOS_NEW(pmp) SCostParam(EcpTupUpdateBandwith, DTupUpdateBandwidthVal, DTupUpdateBandwidthVal - 32.0, DTupUpdateBandwidthVal + 32.0);
m_rgpcp[EcpNetBandwidth] = GPOS_NEW(pmp) SCostParam(EcpNetBandwidth, DNetBandwidthVal, DNetBandwidthVal - 128.0, DNetBandwidthVal + 128.0);
m_rgpcp[EcpSegments] = GPOS_NEW(pmp) SCostParam(EcpSegments, DSegmentsVal, DSegmentsVal - 2.0, DSegmentsVal + 2.0);
m_rgpcp[EcpNLJOuterFactor] = GPOS_NEW(pmp) SCostParam(EcpNLJOuterFactor, DNLJOuterFactorVal, DNLJOuterFactorVal - 128.0, DNLJOuterFactorVal + 128.0);
m_rgpcp[EcpNLJFactor] = GPOS_NEW(pmp) SCostParam(EcpNLJFactor, DNLJFactorVal, DNLJFactorVal - 0.5, DNLJFactorVal + 0.5);
m_rgpcp[EcpHJFactor] = GPOS_NEW(pmp) SCostParam(EcpHJFactor, DHJFactorVal, DHJFactorVal - 1.0, DHJFactorVal + 1.0);
m_rgpcp[EcpHashFactor] = GPOS_NEW(pmp) SCostParam(EcpHashFactor, DHashFactorVal, DHashFactorVal - 1.0, DHashFactorVal + 1.0);
m_rgpcp[EcpDefaultCost] = GPOS_NEW(pmp) SCostParam(EcpDefaultCost, DDefaultCostVal, DDefaultCostVal - 32.0, DDefaultCostVal + 32.0);
}
//---------------------------------------------------------------------------
// @function:
// CCostModelParamsGPDBLegacy::~CCostModelParamsGPDBLegacy
//
// @doc:
// Dtor
//
//---------------------------------------------------------------------------
CCostModelParamsGPDBLegacy::~CCostModelParamsGPDBLegacy()
{
for (ULONG ul = 0; ul < EcpSentinel; ul++)
{
GPOS_DELETE(m_rgpcp[ul]);
m_rgpcp[ul] = NULL;
}
}
//---------------------------------------------------------------------------
// @function:
// CCostModelParamsGPDBLegacy::PcpLookup
//
// @doc:
// Lookup param by id;
//
//
//---------------------------------------------------------------------------
CCostModelParamsGPDBLegacy::SCostParam *
CCostModelParamsGPDBLegacy::PcpLookup
(
ULONG ulId
)
const
{
ECostParam ecp = (ECostParam) ulId;
GPOS_ASSERT(EcpSentinel > ecp);
return m_rgpcp[ecp];
}
//---------------------------------------------------------------------------
// @function:
// CCostModelParamsGPDBLegacy::PcpLookup
//
// @doc:
// Lookup param by name;
// return NULL if name is not recognized
//
//---------------------------------------------------------------------------
CCostModelParamsGPDBLegacy::SCostParam *
CCostModelParamsGPDBLegacy::PcpLookup
(
const CHAR *szName
)
const
{
GPOS_ASSERT(NULL != szName);
for (ULONG ul = 0; ul < EcpSentinel; ul++)
{
if (0 == clib::IStrCmp(szName, rgszCostParamNames[ul]))
{
return PcpLookup((ECostParam) ul);
}
}
return NULL;
}
//---------------------------------------------------------------------------
// @function:
// CCostModelParamsGPDBLegacy::SetParam
//
// @doc:
// Set param by id
//
//---------------------------------------------------------------------------
void
CCostModelParamsGPDBLegacy::SetParam
(
ULONG ulId,
CDouble dVal,
CDouble dLowerBound,
CDouble dUpperBound
)
{
ECostParam ecp = (ECostParam) ulId;
GPOS_ASSERT(EcpSentinel > ecp);
GPOS_DELETE(m_rgpcp[ecp]);
m_rgpcp[ecp] = NULL;
m_rgpcp[ecp] = GPOS_NEW(m_pmp) SCostParam(ecp, dVal, dLowerBound, dUpperBound);
}
//---------------------------------------------------------------------------
// @function:
// CCostModelParamsGPDBLegacy::SetParam
//
// @doc:
// Set param by name
//
//---------------------------------------------------------------------------
void
CCostModelParamsGPDBLegacy::SetParam
(
const CHAR *szName,
CDouble dVal,
CDouble dLowerBound,
CDouble dUpperBound
)
{
GPOS_ASSERT(NULL != szName);
for (ULONG ul = 0; ul < EcpSentinel; ul++)
{
if (0 == clib::IStrCmp(szName, rgszCostParamNames[ul]))
{
GPOS_DELETE(m_rgpcp[ul]);
m_rgpcp[ul] = NULL;
m_rgpcp[ul] = GPOS_NEW(m_pmp) SCostParam(ul, dVal, dLowerBound, dUpperBound);
return;
}
}
}
//---------------------------------------------------------------------------
// @function:
// CCostModelParamsGPDBLegacy::OsPrint
//
// @doc:
// Print function
//
//---------------------------------------------------------------------------
IOstream &
CCostModelParamsGPDBLegacy::OsPrint
(
IOstream &os
)
const
{
for (ULONG ul = 0; ul < EcpSentinel; ul++)
{
SCostParam *pcp = PcpLookup((ECostParam) ul);
os
<< rgszCostParamNames[ul] << " : "
<< pcp->DVal()
<< " [" << pcp->DLowerBound() << "," << pcp->DUpperBound() <<"]"
<< std::endl;
}
return os;
}
// EOF