/**************************************************************************** ** (c) Copyright IBM Corp. 2007 All rights reserved. ** ** The following sample of source code ("Sample") is owned by International ** Business Machines Corporation or one of its subsidiaries ("IBM") and is ** copyrighted and licensed, not sold. You may use, copy, modify, and ** distribute the Sample in any form without payment to IBM, for the purpose of ** assisting you in the development of your applications. ** ** The Sample code is provided to you on an "AS IS" basis, without warranty of ** any kind. IBM HEREBY EXPRESSLY DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR ** IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF ** MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Some jurisdictions do ** not allow for the exclusion or limitation of implied warranties, so the above ** limitations or exclusions may not apply to you. IBM shall not be liable for ** any damages you suffer as a result of using, copying, modifying or ** distributing the Sample, even if IBM has been advised of the possibility of ** such damages. ***************************************************************************** ** ** SOURCE FILE NAME: tbreorg.sqC ** ** SAMPLE: How to reorganize a table and update its statistics ** ** DB2 APIs USED: ** db2Reorg -- Reorganize a Table or Index ** db2Runstats -- Runstats ** ** SQL STATEMENT USED: ** SELECT ** ** ***************************************************************************** ** ** For more information on the sample programs, see the README file. ** ** For information on developing embedded SQL applications see the Developing Embedded SQL Applications book. ** ** For information on using SQL statements, see the SQL Reference. ** ** For information on DB2 APIs, see the Administrative API Reference. ** ** For the latest information on programming, compiling, and running DB2 ** applications, visit the DB2 Information Center at ** http://publib.boulder.ibm.com/infocenter/db2luw/v9r7/index.jsp ****************************************************************************/ #include <string.h> #include <sqlenv.h> #include <sqlutil.h> #include <db2ApiDf.h> #include "utilemb.h" #if ((__cplusplus >= 199711L) && !defined DB2HP && !defined DB2AIX) || \ (DB2LINUX && (__LP64__ || (__GNUC__ >= 3)) ) #include <iostream> using namespace std; #else #include <iostream.h> #endif EXEC SQL BEGIN DECLARE SECTION; char tableName[129]; char schemaName[129]; EXEC SQL END DECLARE SECTION; class TbReorg { public: int TbReorganize(); private: //support function int SchemaNameGet(); }; int TbReorg::SchemaNameGet() { struct sqlca sqlca; // get table schema name EXEC SQL SELECT tabschema INTO :schemaName FROM syscat.tables WHERE tabname = :tableName; EMB_SQL_CHECK("table schema name -- get"); // get rid of spaces from the end of schemaName strtok(schemaName, " "); return 0; } //TbReorg::SchemaNameGet int TbReorg::TbReorganize() { int rc = 0; struct sqlca sqlca; char fullTableName[258]; db2ReorgStruct paramStruct; db2Uint32 versionNumber = db2Version970; db2RunstatsData runStatData; cout << "\n-----------------------------------------------------------"; cout << "\nUSE THE DB2 APIs:" << endl; cout << " db2Reorg -- Reorganize a Table or Index" << endl; cout << " db2Runstats -- Runstats" << endl; cout << "TO REORGANIZE A TABLE AND UPDATE ITS STATISTICS." << endl; // get fully qualified name of the table strcpy(tableName, "EMP_RESUME"); rc = SchemaNameGet(); if (rc != 0) { return rc; } strcpy(fullTableName, schemaName); strcat(fullTableName, "."); strcat(fullTableName, tableName); cout << " Reorganize the table: " << fullTableName << endl; /* setup parameters */ memset(¶mStruct, '\0', sizeof(paramStruct)); paramStruct.reorgObject.tableStruct.pTableName = fullTableName; paramStruct.reorgObject.tableStruct.pOrderByIndex = NULL; paramStruct.reorgObject.tableStruct.pSysTempSpace = NULL; paramStruct.reorgType = DB2REORG_OBJ_TABLE_OFFLINE; paramStruct.reorgFlags = DB2REORG_LONGLOB; paramStruct.nodeListFlag = DB2_ALL_NODES; paramStruct.numNodes = 0; paramStruct.pNodeList = NULL; // reorganize table rc = db2Reorg(versionNumber, ¶mStruct, &sqlca); DB2_API_CHECK("table -- reorganize"); cout << " Update statistics for the table: " << fullTableName << endl; // runstats table runStatData.iSamplingOption = 0; runStatData.piTablename = ( unsigned char *) fullTableName; runStatData.piColumnList = NULL; runStatData.piColumnDistributionList = NULL; runStatData.piColumnGroupList = NULL; runStatData.piIndexList = NULL; runStatData.iRunstatsFlags = DB2RUNSTATS_ALL_INDEXES; runStatData.iRunstatsFlags |= DB2RUNSTATS_SAMPLING_SYSTEM; runStatData.iSamplingOption = 20; // each page has a 20% chance of being // included in the sample runStatData.iRunstatsFlags |= DB2RUNSTATS_SAMPLING_REPEAT; runStatData.iSamplingRepeatable = 23; // seed to keep results consistent runStatData.iNumColumns = 0; runStatData.iNumColdist = 0; runStatData.iNumColGroups = 0; runStatData.iNumIndexes = 0; runStatData.iParallelismOption = 0; runStatData.iTableDefaultFreqValues = 0; runStatData.iTableDefaultQuantiles = 0; runStatData.iUtilImpactPriority = 100; db2Runstats (versionNumber, &runStatData, &sqlca); DB2_API_CHECK("table -- runstats"); cout << " Make sure to rebind all packages that use this table." << endl; return rc; } //TbReorg::TbReorganize int main(int argc, char *argv[]) { int rc = 0; CmdLineArgs check; TbReorg reorg; DbEmb db; // check the command line arguments rc = check.CmdLineArgsCheck1(argc, argv, db); if (rc != 0) { return rc; } cout << "\nTHIS SAMPLE SHOWS "; cout << "HOW TO REORGANIZE A TABLE AND UPDATE ITS STATISTICS." << endl; // connect to database rc = db.Connect(); if (rc != 0) { return rc; } rc = reorg.TbReorganize(); // disconnect from the database rc = db.Disconnect(); if (rc != 0) { return rc; } return 0; } //main