/****************************************************************************
** (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 */