/**************************************************************************** ** (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: dbconn.sqc ** ** SAMPLE: How to connect to and disconnect from a database ** ** DB2 API USED: ** db2DatabaseRestart -- RESTART DATABASE ** sqlefrce -- FORCE APPLICATION ** ** SQL STATEMENT USED: ** CONNECT ** ** ***************************************************************************** ** ** 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, building, and running DB2 ** applications, visit the DB2 Information Center: ** http://publib.boulder.ibm.com/infocenter/db2luw/v9r7/index.jsp ****************************************************************************/ #include <stdio.h> #include <stdlib.h> #include <string.h> #include <sqlenv.h> #include <sqlutil.h> #include <db2ApiDf.h> #include "utilemb.h" int DbConnect(char *, char *, char *); int DbRestart(char *, char *, char *); int DbDisconnect(void); int AllApplicationsConnectedToAllDatabasesForceOff(void); int main(int argc, char *argv[]) { int rc = 0; char nodeName[SQL_INSTNAME_SZ + 1]; EXEC SQL BEGIN DECLARE SECTION; char dbAlias[15]; char user[128 + 1]; char pswd[15]; EXEC SQL END DECLARE SECTION; /* check the command line arguments */ rc = CmdLineArgsCheck3(argc, argv, dbAlias, nodeName, user, pswd); if (rc != 0) { return rc; } printf("\nTHIS SAMPLE SHOWS HOW TO CONNECT TO/DISCONNECT FROM DATABASES."); printf("\n"); rc = DbConnect(dbAlias, user, pswd); rc = DbRestart(dbAlias, user, pswd); rc = DbDisconnect(); /* attach to a local or remote instance */ rc = InstanceAttach(nodeName, user, pswd); if (rc != 0) { return rc; } /* The next function will disconnect all the applications from all */ /* the databases located in the instance you are attached to. */ /* Uncomment the next function if this is acceptable. */ /* rc = AllApplicationsConnectedToAllDatabasesForceOff(); */ /* detach from the local or remote instance */ rc = InstanceDetach(nodeName); if (rc != 0) { return rc; } return rc; } /* end main */ int DbConnect(char dbAlias[], char user[], char pswd[]) { struct sqlca sqlca; printf("\n-----------------------------------------------------------"); printf("\nUSE THE SQL STATEMENT:\n"); printf(" CONNECT TO\n"); printf("TO CONNECT TO A DATABASE.\n"); /* connect to a database */ printf("\n Execute the statement\n"); printf(" CONNECT TO %s\n", dbAlias); if (strlen(user) > 0) { EXEC SQL CONNECT TO :dbAlias USER :user USING :pswd; EMB_SQL_CHECK("database -- connect with userid and password"); } else { EXEC SQL CONNECT TO :dbAlias; EMB_SQL_CHECK("Database -- Connect"); } return 0; } /* DbConnect */ int DbRestart(char dbAlias[], char user[], char pswd[]) { struct sqlca sqlca; struct db2RestartDbStruct dbRestartParam; printf("\n-----------------------------------------------------------"); printf("\nUSE THE DB2 API:\n"); printf(" db2DatabaseRestart -- RESTART DATABASE\n"); printf("TO RESTART A DATABASE.\n"); /* restart a database */ dbRestartParam.piDatabaseName = dbAlias; dbRestartParam.piUserId = user; dbRestartParam.piPassword = pswd; dbRestartParam.piTablespaceNames = NULL; printf("\n Restart a database.\n"); printf(" database alias: %s\n", dbAlias); /* restart database */ db2DatabaseRestart(db2Version970, &dbRestartParam, &sqlca); DB2_API_CHECK("Database -- Restart"); return 0; } /* DbRestart */ int DbDisconnect(void) { struct sqlca sqlca; printf("\n-----------------------------------------------------------"); printf("\nUSE THE SQL STATEMENT:\n"); printf(" CONNECT RESET"); printf("\nTO DISCONNECT FROM THE CURRENT DATABASE.\n"); /* disconnect from the database */ printf("\n Execute the statement\n"); printf(" CONNECT RESET\n"); EXEC SQL CONNECT RESET; EMB_SQL_CHECK("Database -- Disconnect"); return 0; } /* DbDisconnect */ int AllApplicationsConnectedToAllDatabasesForceOff(void) { struct sqlca sqlca; printf("\n-----------------------------------------------------------"); printf("\nUSE THE DB2 API:\n"); printf(" sqlefrce -- FORCE APPLICATION\n"); printf("TO FORCE OFF ALL THE APPLICATIONS CONNECTED TO ALL DATABASES.\n"); /* force off all the appl. connected to all databases */ printf("\n Force off all applications connected to all databases.\n"); /* force application */ sqlefrce(SQL_ALL_USERS, NULL, SQL_ASYNCH, &sqlca); DB2_API_CHECK("DBM Config. -- Set"); return 0; } /* AllApplicationsConnectedToAllDatabasesForceOff */