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/*
* Program type: Embedded Dynamic SQL
*
* Description:
* 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.
* 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 "example.h"
#include <stdlib.h>
#include <string.h>
int get_input (char *dept_no, double *percent);
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 Db_name[128];
EXEC SQL
SET DATABASE empdb = "employee.fdb" RUNTIME :Db_name;
char *upd_str =
"UPDATE department SET budget = ? * budget + budget WHERE dept_no = ?";
int main(int argc, char** argv)
{
BASED_ON department.dept_no dept_no;
double percent_inc;
short nullind = 0;
XSQLDA *sqlda;
if (argc > 1)
strcpy(Db_name, argv[1]);
else
strcpy(Db_name, "employee.fdb");
EXEC SQL
WHENEVER SQLERROR GO TO Error;
EXEC SQL
CONNECT empdb;
EXEC SQL
SET TRANSACTION USING empdb;
/* Allocate an input SQLDA. There are two unknown parameters. */
sqlda = (XSQLDA *) malloc(XSQLDA_LENGTH(2));
sqlda->sqln = 2;
sqlda->sqld = 2;
sqlda->version = 1;
/* Prepare the query. */
EXEC SQL
PREPARE q FROM :upd_str;
/* Prepare the input sqlda, only data and indicator to set */
EXEC SQL
DESCRIBE INPUT q USING SQL DESCRIPTOR sqlda;
sqlda->sqlvar[0].sqldata = (char *) &percent_inc;
sqlda->sqlvar[0].sqlind = &nullind;
sqlda->sqlvar[1].sqldata = dept_no;
/* FOrce the type to char instead of varchar */
sqlda->sqlvar[1].sqltype = SQL_TEXT +1;
sqlda->sqlvar[1].sqlind = &nullind;
/* Expect an error, trap it */
EXEC SQL WHENEVER SQLERROR CONTINUE;
/*
* Get the next department-percent increase input pair.
*/
while (get_input(dept_no, &percent_inc))
{
printf("\nIncreasing budget for department: %s by %5.2f percent.\n",
dept_no, percent_inc);
/* Update the budget. */
EXEC SQL
EXECUTE q USING SQL DESCRIPTOR sqlda;
/* Don't save the update, if the new budget exceeds
** the limit. Detect an integrity violation
*/
if (SQLCODE == -625)
{
printf("\tExceeded budget limit -- not updated.\n");
continue;
}
/* Undo all changes, in case of an error. */
else if (SQLCODE)
goto Error;
/* Save each department's update independently. */
EXEC SQL
COMMIT RETAIN;
}
EXEC SQL
COMMIT RELEASE;
return (0);
Error:
isc_print_status(gds__status);
printf("SQLCODE=%d\n", SQLCODE);
EXEC SQL
ROLLBACK RELEASE;
EXEC SQL
DISCONNECT empdb;
free( sqlda);
return(1);
}
/*
* 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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