139 lines
4.2 KiB
C++
139 lines
4.2 KiB
C++
/*
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* Legal Notice
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*
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* This document and associated source code (the "Work") is a part of a
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* benchmark specification maintained by the TPC.
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*
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* The TPC reserves all right, title, and interest to the Work as provided
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* under U.S. and international laws, including without limitation all patent
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* and trademark rights therein.
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*
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* No Warranty
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*
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* 1.1 TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE INFORMATION
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* CONTAINED HEREIN IS PROVIDED "AS IS" AND WITH ALL FAULTS, AND THE
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* AUTHORS AND DEVELOPERS OF THE WORK HEREBY DISCLAIM ALL OTHER
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* WARRANTIES AND CONDITIONS, EITHER EXPRESS, IMPLIED OR STATUTORY,
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* INCLUDING, BUT NOT LIMITED TO, ANY (IF ANY) IMPLIED WARRANTIES,
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* DUTIES OR CONDITIONS OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
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* PURPOSE, OF ACCURACY OR COMPLETENESS OF RESPONSES, OF RESULTS, OF
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* WORKMANLIKE EFFORT, OF LACK OF VIRUSES, AND OF LACK OF NEGLIGENCE.
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* ALSO, THERE IS NO WARRANTY OR CONDITION OF TITLE, QUIET ENJOYMENT,
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* QUIET POSSESSION, CORRESPONDENCE TO DESCRIPTION OR NON-INFRINGEMENT
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* WITH REGARD TO THE WORK.
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* 1.2 IN NO EVENT WILL ANY AUTHOR OR DEVELOPER OF THE WORK BE LIABLE TO
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* ANY OTHER PARTY FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO THE
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* COST OF PROCURING SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS
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* OF USE, LOSS OF DATA, OR ANY INCIDENTAL, CONSEQUENTIAL, DIRECT,
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* INDIRECT, OR SPECIAL DAMAGES WHETHER UNDER CONTRACT, TORT, WARRANTY,
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* OR OTHERWISE, ARISING IN ANY WAY OUT OF THIS OR ANY OTHER AGREEMENT
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* RELATING TO THE WORK, WHETHER OR NOT SUCH AUTHOR OR DEVELOPER HAD
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* ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
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*
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* Contributors
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* - Sergey Vasilevskiy, Doug Johnson
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*/
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/******************************************************************************
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* Description: This class encapsulates customer tier distribution
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* functions and provides functionality to:
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* - Generate customer tier based on customer ID
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* - Generate non-uniform customer ID
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* - Generate customer IDs in a specified partition, and
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* outside the specified partition a set percentage of
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* the time.
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******************************************************************************/
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#ifndef CUSTOMER_SELECTION_H
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#define CUSTOMER_SELECTION_H
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#include "utilities/Random.h"
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namespace TPCE {
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/*
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* Define customer tier type.
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*/
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enum eCustomerTier { eCustomerTierOne = 1, eCustomerTierTwo, eCustomerTierThree };
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class CCustomerSelection {
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CRandom *m_pRND; // external random number generator
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TIdent m_iStartFromCustomer;
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TIdent m_iCustomerCount;
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/*
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* Used when partitioning by C_ID.
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*/
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bool m_bPartitionByCID;
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int m_iPartitionPercent;
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TIdent m_iMyStartFromCustomer;
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TIdent m_iMyCustomerCount;
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/*
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* Forward permutation (used to convert ordinal C_ID into real C_ID).
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*/
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TIdent Permute(TIdent iLow, TIdent iHigh);
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/*
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* Inverse permutation (used to convert real C_ID into it's ordinal
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* number).
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*/
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TIdent InversePermute(TIdent iLow, TIdent iHigh);
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/*
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* Get lower 3 digits.
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*/
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inline TIdent CLow(TIdent C_ID) {
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return ((C_ID - 1) % 1000);
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}
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/*
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* Get higher digits.
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*/
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inline TIdent CHigh(TIdent C_ID) {
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return ((C_ID - 1) / 1000);
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}
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public:
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/*
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* Default constructor.
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*/
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CCustomerSelection();
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/*
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* Constructor to set the customer range.
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*/
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CCustomerSelection(CRandom *pRND, TIdent iStartFromCustomer, TIdent iCustomerCount);
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/*
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* Constructor to set subrange when paritioning by C_ID.
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*/
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CCustomerSelection(CRandom *pRND, TIdent iStartFromCustomer, TIdent iCustomerCount, int iPartitionPercent,
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TIdent iMyStartFromCustomer, TIdent iMyCustomerCount);
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/*
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* Re-set the customer range for the parition.
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*/
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void SetPartitionRange(TIdent iStartFromCustomer, TIdent iCustomerCount);
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/*
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* Return scrambled inverse customer id.
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*/
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UINT GetInverseCID(TIdent C_ID);
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/*
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* Return customer tier.
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*/
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eCustomerTier GetTier(TIdent C_ID);
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/*
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* Return a non-uniform random customer and the associated tier.
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*/
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void GenerateRandomCustomer(TIdent &C_ID, eCustomerTier &C_TIER);
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};
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} // namespace TPCE
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#endif // CUSTOMER_SELECTION_H
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