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/*
* Program type: Embedded Static SQL
*
* Description:
* This program executes a stored procedure and selects from
* a stored procedure. First, a list of projects an employee
* is involved in is printed. Then the employee is added to
* another project. The new list of projects is printed again.
* 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>
#include <stdio.h>
EXEC SQL INCLUDE SQLCA;
void select_projects (short emp_no);
void get_params (short *emp_no, char* proj_id);
void pr_error (long status);
void add_emp_proj (short emp_no,char * proj_id);
int main (void)
{
BASED_ON employee.emp_no emp_no;
BASED_ON project.proj_id proj_id;
/*
* Add employee with id 8 to project 'MAPDB'.
*/
get_params(&emp_no, proj_id);
/*
* Display employee's current projects.
*/
printf("\nCurrent projects for employee id: %d\n\n", emp_no);
select_projects(emp_no);
/*
* Insert a new employee project row.
*/
printf("\nAdd employee id: %d to project: %s\n", emp_no, proj_id);
add_emp_proj(emp_no, proj_id);
/*
* Display employee's new current projects.
*/
printf("\nCurrent projects for employee id: %d\n\n", emp_no);
select_projects(emp_no);
}
/*
* Select from a stored procedure.
* Procedure 'get_emp_proj' gets employee's projects.
*/
void select_projects(BASED_ON employee.emp_no emp_no)
{
BASED_ON project.proj_id proj_id;
EXEC SQL
WHENEVER SQLERROR GO TO SelError;
/* Declare a cursor on the stored procedure. */
EXEC SQL
DECLARE projects CURSOR FOR
SELECT proj_id FROM get_emp_proj (:emp_no)
ORDER BY proj_id;
EXEC SQL
OPEN projects;
/* Print employee projects. */
while (SQLCODE == 0)
{
EXEC SQL
FETCH projects INTO :proj_id;
if (SQLCODE == 100)
break;
printf("\t%s\n", proj_id);
}
EXEC SQL
CLOSE projects;
EXEC SQL
COMMIT RETAIN;
SelError:
if (SQLCODE)
pr_error((long)gds__status);
}
/*
* Execute a stored procedure.
* Procedure 'add_emp_proj' adds an employee to a project.
*/
void add_emp_proj(BASED_ON employee.emp_no emp_no, BASED_ON project.proj_id proj_id)
{
EXEC SQL
WHENEVER SQLERROR GO TO AddError;
EXEC SQL
EXECUTE PROCEDURE add_emp_proj :emp_no, :proj_id;
EXEC SQL
COMMIT;
AddError:
if (SQLCODE)
pr_error((long)gds__status);
}
/*
* Set-up procedure parameters and clean-up old data.
*/
void get_params(BASED_ON employee.emp_no *emp_no, BASED_ON project.proj_id proj_id)
{
*emp_no = 8;
strcpy(proj_id, "MAPDB");
EXEC SQL
WHENEVER SQLERROR GO TO CleanupError;
/* Cleanup: delete row from the previous run. */
EXEC SQL
DELETE FROM employee_project
WHERE emp_no = 8 AND proj_id = "MAPDB";
CleanupError:
return;
}
/*
* Print an error message.
*/
void pr_error(long status)
{
isc_print_sqlerror(SQLCODE, gds__status);
}
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