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/*
* Program type: API Interface
*
* Desription:
* This program updates departments' budgets, given
* the department and the new budget information parameters.
*
* An input SQLDA is allocated for the update query
* with parameter markers.
* Note that all updates are rolled back in this version.
* The contents of this file are subject to the Interbase Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy
* of the License at http://www.Inprise.com/IPL.html
*
* Software distributed under the License is distributed on an
* "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express
* or implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code was created by Inprise Corporation
* and its predecessors. Portions created by Inprise Corporation are
* Copyright (C) Inprise Corporation.
*
* All Rights Reserved.
* Contributor(s): ______________________________________.
*/
#include <stdlib.h>
#include <string.h>
#include <ibase.h>
#include <stdio.h>
#include "example.h"
int get_input (char* , double*);
static char *Dept_data[] =
{"622", "100", "116", "900", 0};
static double Percent_data[] =
{0.05, 1.00, 0.075, 0.10, 0};
int Input_ptr = 0;
char *updstr =
"UPDATE department SET budget = ? * budget + budget WHERE dept_no = ?";
isc_db_handle DB = NULL; /* database handle */
isc_tr_handle trans = NULL; /* transaction handle */
ISC_STATUS_ARRAY status; /* status vector */
int main (int argc, char** argv)
{
char dept_no[4];
double percent_inc;
short flag0 = 0, flag1 = 0;
XSQLDA *sqlda;
long sqlcode;
char empdb[128];
if (argc > 1)
strcpy(empdb, argv[1]);
else
strcpy(empdb, "employee.fdb");
if (isc_attach_database(status, 0, empdb, &DB, 0, NULL))
{
ERREXIT(status, 1)
}
/* Allocate an input SQLDA. There are two unknown parameters. */
sqlda = (XSQLDA *) malloc(XSQLDA_LENGTH(2));
sqlda->sqln = 2;
sqlda->sqld = 2;
sqlda->version = 1;
sqlda->sqlvar[0].sqldata = (char *) &percent_inc;
sqlda->sqlvar[0].sqltype = SQL_DOUBLE + 1;
sqlda->sqlvar[0].sqllen = sizeof(percent_inc);
sqlda->sqlvar[0].sqlind = &flag0;
flag0 = 0;
sqlda->sqlvar[1].sqldata = dept_no;
sqlda->sqlvar[1].sqltype = SQL_TEXT + 1;
sqlda->sqlvar[1].sqllen = 3;
sqlda->sqlvar[1].sqlind = &flag1;
flag1 = 0;
/*
* Get the next department-percent increase input pair.
*/
while (get_input(dept_no, &percent_inc))
{
printf("\nIncreasing budget for department: %s by %5.2lf percent.\n",
dept_no, percent_inc);
if (isc_start_transaction(status, &trans, 1, &DB, 0, NULL))
{
ERREXIT(status, 1)
}
/* Update the budget. */
isc_dsql_execute_immediate(status, &DB, &trans, 0, updstr, 1, sqlda);
sqlcode = isc_sqlcode(status);
if (sqlcode)
{
/* Don't save the update, if the new budget exceeds the limit. */
if (sqlcode == -625)
{
printf("\tExceeded budget limit -- not updated.\n");
if (isc_rollback_transaction(status, &trans))
{
ERREXIT(status, 1)
}
continue;
}
/* Undo all changes, in case of an error. */
else
{
isc_print_status(status);
printf("SQLCODE=%d\n", sqlcode);
isc_rollback_transaction(status, &trans);
ERREXIT(status, 1)
}
}
/* Save each department's update independently.
** Change to isc_commit_transaction to see changes
*/
if (isc_rollback_transaction (status, &trans))
{
ERREXIT(status, 1)
}
}
if (isc_detach_database(status, &DB))
{
ERREXIT(status, 1)
}
free(sqlda);
return 0;
}
/*
* Get the department and percent parameters.
*/
int get_input (char *dept_no, double *percent)
{
if (Dept_data[Input_ptr] == 0)
return 0;
strcpy(dept_no, Dept_data[Input_ptr]);
if ((*percent = Percent_data[Input_ptr++]) == 0)
return 0;
return 1;
}
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