/****************************************************************************
** (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: dbmcon.sqc
**
** SAMPLE: How to use multiple databases
**
** This sample program requires a second database
** that has to be created as follows:
** - locally:
** db2 create db sample2
** - remotely:
** db2 attach to node_name
** db2 create db sample2
** db2 detach
** db2 catalog db sample2 as sample2 at node node_name
** If another name is used for the second database,
** it can be specified in the command line arguments
** as follows:
** dbmcon [dbAlias1 dbAlias2 [user1 pswd1 [user2 pswd2]]
** The second database can be dropped as follows:
** - locally:
** db2 drop db sample2
** - remotely:
** db2 attach to node_name
** db2 drop db sample2
** db2 detach
** db2 uncatalog db sample2
**
** This sample also requires that the TCPIP listener is running. To
** ensure this, do the following:
** 1. Set the environment variable DB2COMM to TCPIP as follows:
** "db2set DB2COMM=TCPIP"
** 2. Update the database manager configuration file with the TCP/IP
** service name as specified in the services file:
** "db2 update dbm cfg using SVCENAME <TCP/IP service name>"
** You must do a "db2stop" and "db2start" for this setting to take
** effect.
**
** DB2 API USED:
** sqlesetc -- SET CLIENT
**
** SQL STATEMENTS USED:
** CONNECT
** SET CONNECTION
** DISCONNECT
**
** dbmcon dbmcon
*****************************************************************************
**
** For more information on the sample programs, see the README file.
**
** For information on developing C applications, see the Application
** Development Guide.
**
** 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 "utilemb.h"
#include "dbmcon1.h"
#include "dbmcon2.h"
int TwoDbConnectType1(void);
int TwoDbConnectType2OnePhaseCommit(void);
EXEC SQL BEGIN DECLARE SECTION;
char dbAlias1[15];
char dbAlias2[15];
char user1[129];
char user2[129];
char pswd1[15];
char pswd2[15];
EXEC SQL END DECLARE SECTION;
int main(int argc, char *argv[])
{
int rc = 0;
/* check the command line arguments */
rc = CmdLineArgsCheck4(argc,
argv,
dbAlias1,
dbAlias2,
user1,
pswd1,
user2,
pswd2);
if (rc != 0)
{
return rc;
}
printf("\nTHIS SAMPLE SHOWS HOW TO USE MULTIPLE DATABASES.\n");
rc = TwoDbConnectType1();
rc = TwoDbConnectType2OnePhaseCommit();
return 0;
} /* end main */
int TwoDbConnectType1(void)
{
int rc = 0;
struct sqlca sqlca;
struct sqle_conn_setting clientAppInfo[2];
printf("\n-----------------------------------------------------------");
printf("\nUSE THE DB2 API:\n");
printf(" sqlesetc -- SET CLIENT\n");
printf("AND THE SQL STATEMENTS:\n");
printf(" CONNECT\n");
printf(" COMMIT\n");
printf(" CONNECT RESET\n");
printf("TO USE TYPE1 CONNECT TO TWO DATABASES.\n");
/* set client connection attributes */
printf("\n Set the Client Connection Attributes to the values:\n");
printf(" SQL_CONNECT_TYPE = SQL_CONNECT_1\n");
printf(" SQL_DISCONNECT = SQL_DISCONNECT_EXPL\n");
clientAppInfo[0].type = SQL_CONNECT_TYPE;
clientAppInfo[0].value = SQL_CONNECT_1;
clientAppInfo[1].type = SQL_DISCONNECT;
clientAppInfo[1].value = SQL_DISCONNECT_EXPL;
/* set client information */
sqlesetc(&clientAppInfo[0], 2, &sqlca);
DB2_API_CHECK("Client Connection Attributes -- set");
/* work with databases */
printf("\n CONNECT TO %s\n", dbAlias1);
if (strlen(user1) > 0)
{
EXEC SQL CONNECT TO :dbAlias1 USER :user1 USING :pswd1;
}
else
{
EXEC SQL CONNECT TO :dbAlias1;
}
EMB_SQL_CHECK("first database -- connect");
rc = FirstDbCreateTable();
printf(" COMMIT\n");
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
printf(" CONNECT RESET\n");
EXEC SQL CONNECT RESET;
EMB_SQL_CHECK("connection -- reset");
printf("\n CONNECT TO %s\n", dbAlias2);
if (strlen(user2) > 0)
{
EXEC SQL CONNECT TO :dbAlias2 USER :user2 USING :pswd2;
}
else
{
EXEC SQL CONNECT TO :dbAlias2;
}
EMB_SQL_CHECK("second database -- connect");
rc = SecondDbCreateTable();
printf(" COMMIT\n");
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
printf(" CONNECT RESET\n");
EXEC SQL CONNECT RESET;
EMB_SQL_CHECK("connection -- reset");
printf("\n CONNECT TO %s\n", dbAlias1);
if (strlen(user1) > 0)
{
EXEC SQL CONNECT TO :dbAlias1 USER :user1 USING :pswd1;
}
else
{
EXEC SQL CONNECT TO :dbAlias1;
}
EMB_SQL_CHECK("first database -- connect");
rc = FirstDbDropTable();
printf(" COMMIT\n");
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
printf(" CONNECT RESET\n");
EXEC SQL CONNECT RESET;
EMB_SQL_CHECK("connection -- reset");
printf("\n CONNECT TO %s\n", dbAlias2);
if (strlen(user2) > 0)
{
EXEC SQL CONNECT TO :dbAlias2 USER :user2 USING :pswd2;
}
else
{
EXEC SQL CONNECT TO :dbAlias2;
}
EMB_SQL_CHECK("first database -- connect");
rc = SecondDbDropTable();
printf(" COMMIT\n");
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
printf(" CONNECT RESET\n");
EXEC SQL CONNECT RESET;
EMB_SQL_CHECK("connection -- reset");
return 0;
} /* TwoDbConnectType1 */
int TwoDbConnectType2OnePhaseCommit(void)
{
int rc = 0;
struct sqlca sqlca;
struct sqle_conn_setting clientAppInfo[3];
printf("\n-----------------------------------------------------------");
printf("\nUSE THE DB2 API:\n");
printf(" sqlesetc -- SET CLIENT\n");
printf("AND THE SQL STATEMENTS:\n");
printf(" CONNECT\n");
printf(" SET CONNECTION\n");
printf(" COMMIT\n");
printf(" DISCONNECT\n");
printf("TO USE TYPE2 - ONE PHASE CONNECT TO TWO DATABASES.\n");
/* set client connection attributes */
printf("\n Set the Client Connection Attributes to the values:\n");
printf(" SQL_CONNECT_TYPE = SQL_CONNECT_2\n");
printf(" SQL_DISCONNECT = SQL_DISCONNECT_EXPL\n");
printf(" SQL_SYNCPOINT = SQL_SYNC_ONEPHASE\n");
clientAppInfo[0].type = SQL_CONNECT_TYPE;
clientAppInfo[0].value = SQL_CONNECT_2;
clientAppInfo[1].type = SQL_DISCONNECT;
clientAppInfo[1].value = SQL_DISCONNECT_EXPL;
clientAppInfo[2].type = SQL_SYNCPOINT;
clientAppInfo[2].value = SQL_SYNC_ONEPHASE;
/* set client information */
sqlesetc(&clientAppInfo[0], 3, &sqlca);
DB2_API_CHECK("Client Connection Attributes -- set");
/* work with databases */
printf("\n CONNECT TO %s\n", dbAlias1);
if (strlen(user1) > 0)
{
EXEC SQL CONNECT TO :dbAlias1 USER :user1 USING :pswd1;
}
else
{
EXEC SQL CONNECT TO :dbAlias1;
}
EMB_SQL_CHECK("first database -- connect");
printf("\n CONNECT TO %s\n", dbAlias2);
if (strlen(user2) > 0)
{
EXEC SQL CONNECT TO :dbAlias2 USER :user2 USING :pswd2;
}
else
{
EXEC SQL CONNECT TO :dbAlias2;
}
EMB_SQL_CHECK("second database -- connect");
printf("\n SET CONNECTION %s\n", dbAlias1);
EXEC SQL SET CONNECTION :dbAlias1;
EMB_SQL_CHECK("first connection -- activate");
rc = FirstDbCreateTable();
printf(" COMMIT\n");
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
printf("\n SET CONNECTION %s\n", dbAlias2);
EXEC SQL SET CONNECTION :dbAlias2;
EMB_SQL_CHECK("second connection -- activate");
rc = SecondDbCreateTable();
printf(" COMMIT\n");
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
printf("\n SET CONNECTION %s\n", dbAlias1);
EXEC SQL SET CONNECTION :dbAlias1;
EMB_SQL_CHECK("first connection -- activate");
rc = FirstDbDropTable();
printf(" COMMIT\n");
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
printf("\n SET CONNECTION %s\n", dbAlias2);
EXEC SQL SET CONNECTION :dbAlias2;
EMB_SQL_CHECK("second connection -- activate");
rc = SecondDbDropTable();
printf(" COMMIT\n");
EXEC SQL COMMIT;
EMB_SQL_CHECK("transaction -- commit");
printf("\n DISCONNECT ALL\n");
EXEC SQL DISCONNECT ALL;
EMB_SQL_CHECK("all connections -- disconnect");
return 0;
} /* TwoDbConnectType2OnePhaseCommit */