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Oracle® Transparent Gateway for DRDA Installation and User's Guide
10g Release 2 (10.2) for UNIX

Part Number B16217-02
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G Sample Applications

This appendix containsthe code for sample applications that can be used with the gateway. The application contains the following:

DB2INS

DB2INS is a sample DB2 stored procedure that inserts a row into a DB2 table. This procedure uses the SIMPLE linkage convention.

/***************************************************************************/
/*                                                                         */
/* This DB2 stored procedure inserts values for the DNAME and LOC          */
/* columns of DB2 user table SCOTT.DEPT.                                   */
/*                                                                         */
/* The SCOTT.DEPT table is defined to DB2 as                               */
/*       DEPTNO INTEGER, DNAME CHAR(14), LOC VARCHAR(13).                  */
/*                                                                         */
/* This procedure receives 3 input parameters from the calling             */
/* program which contain the values to insert for DEPTNO, DNAME, and       */
/* LOC.                                                                    */
/*                                                                         */
/* The linkage convention used for this stored procedure is SIMPLE.        */
/*                                                                         */
/* The output parameter for this procedure contains the SQLCODE from       */
/* the INSERT operation.                                                   */
/*                                                                         */
/* The entry in the DB2 catalog table SYSIBM.SYSPROCEDURES for this        */
/* stored procedure might look like this:                                  */
/*                                                                         */
/* INSERT INTO SYSIBM.SYSPROCEDURES                                        */
/*   (PROCEDURE, AUTHID, LUNAME, LOADMOD, LINKAGE, COLLID, LANGUAGE,       */
/*    ASUTIME, STAYRESIDENT, IBMREQD, RUNOPTS, PARMLIST)                   */
/* VALUES                                                                  */
/*   ('DB2INS',  ' ', ' ', 'DB2INS', ' ', 'DB2DEV', 'C', '0', ' ',         */
/*    'N', ' ', 'A INT IN, B CHAR(14) IN, C VARCHAR(13) IN,                */
/*    D INT OUT, E CHAR(10) OUT');                                         */
/***************************************************************************/
#pragma runopts(plist(os))
#include <stdlib.h>
#include <stdlib.h>
  EXEC SQL INCLUDE SQLCA;
/***************************************************************************/
/* Declare C variables for SQL operations on the parameters.  These        */
/* are local variables to the C program which you must copy to and         */
/* from the parameter list provided to the stored procedure.               */
/***************************************************************************/
  EXEC SQL BEGIN DECLARE SECTION;
  long dno;               /* input parm - DEPTNO */
  char dname[15];         /* input parm - DNAME  */
  char locale[14];        /* input parm - LOC    */
  EXEC SQL END DECLARE SECTION;
main(argc,argv)
  int argc;
 char *argv[];
{
/****************************************************************************/
/* Copy the input parameters into the area reserved in the local            */
/* program for SQL processing.                                              */
/****************************************************************************/
   dno = *(int *) argv[1];
   strcpy(dname, argv[2]);
   strcpy(locale, argv[3]);
/****************************************************************************/
/* Issue SQL INSERT to insert a row into SCOTT.DEPT                         */
/****************************************************************************/
 EXEC SQL INSERT INTO SCOTT.DEPT VALUES(:dno, :dname, :locale);
/****************************************************************************/
/* Copy SQLCODE to the output parameter list.                               */
/****************************************************************************/
   *(int *) argv[4] = SQLCODE;
}

ORAIND

ORAIND is a sample host program that calls a DB2 stored procedure (DB2INS) to insert a row into a DB2 table.

/*****************************************************************************/
/* This sample ProC program calls DB2 stored procedure DB2INS to             */
/* insert values into the DB2 user table SCOTT.DEPT.  This calling           */
/* program uses embedded PL/SQL to call the stored procedure.                */
/*****************************************************************************/
#include <stdio.h>EXEC SQL BEGIN DECLARE SECTION;
        VARCHAR         username[20];
        VARCHAR         password[20];
        int             dept_no;
        char            dept_name[14];
        VARCHAR         location[13];
        int             code;
        char            buf[11];
        int             x;
EXEC SQL END DECLARE SECTION;
EXEC SQL INCLUDE SQLCA;
main()
{
/******************************************************************************/
/* Setup Oracle userid and password                                           */
/******************************************************************************/
  strcpy(username.arr, "SCOTT");          /* copy the username */
  username.len = strlen(username.arr);
  strcpy(password.arr, "TIGER");          /* copy the password */
  password.len = strlen(password.arr);
  EXEC SQL WHENEVER SQLERROR GOTO sqlerror;
/******************************************************************************/
/* Logon to Oracle                                                            */
/******************************************************************************/
  EXEC SQL CONNECT :username IDENTIFIED BY :password;
  printf("\nConnected to ORACLE as user: %s\n", username.arr);
  /* Delete any existing rows from DB2 table */
  EXEC SQL DELETE FROM SCOTT.DEPT@GTWLINK;
  EXEC SQL COMMIT;
/*------------------------ begin pl/sql block --------------------------------*/
/******************************************************************************/
/* Insert 1 row into DB2 table SCOTT.DEPT by invoking DB2 stored              */
/* procedure DB2INS.  The DB2 stored procedure will perform the               */
/* INSERT.                                                                    */
/*                                                                            */
/* SCOTT.DEPT table is defined on DB2 as:                                     */
/*                                                                            */
/*    DEPTNO    INTEGER;                                                      */
/*    DNAME     CHAR(14);                                                     */
/*    LOC       VARCHAR(13);                                                  */
/*                                                                            */
/******************************************************************************/
  EXEC SQL EXECUTE  BEGIN     :dept_no := 10;
     :dept_name := 'gateway';
     :location := 'ORACLE';
     DB2INS@GTWLINK(:dept_no, :dept_name, :location, :code);
  END;
  END-EXEC;
/*--------------------------- end pl/sql block -------------------------------*/
/******************************************************************************/
/* Check the SQLCODE returned from the stored procedures INSERT.              */
/******************************************************************************/
  if (code == 0)
    printf("DB2INS reports successful INSERT\n");
  else
  {
    printf("DB2INS reports error on INSERT.\nSQLCODE=%d\n",code);
    goto sqlerror
  }
/******************************************************************************/
/* Verify row insertion.  Query the data just inserted.                       */
/******************************************************************************/
   EXEC SQL SELECT deptno, dname, loc INTO
      :dept_no, :dept_name, :location
      FROM SCOTT.DEPT@GTWLINK WHERE deptno = 10;
   printf("\nData INSERTed was:\n");
   printf("\ndeptno = %d, dname = %s, loc = %s\n",
          dept_no, dept_name, location.arr)
/******************************************************************************/
/* Logoff from Oracle                                                         */
/******************************************************************************/
  EXEC SQL COMMIT RELEASE;
  printf("\n\nHave a good day\n\n");
  exit(0);
  sqlerror:
    printf("\n% .70s \n", sqlca.sqlerrm.sqlerrmc);
    EXEC SQL WHENEVER SQLERROR CONTINUE;
    EXEC SQL ROLLBACK RELEASE;
    exit(1);
}