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/*
* Program type: API Interface
*
* 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 <stdlib.h>
#include <string.h>
#include <ibase.h>
#include <stdio.h>
#include "example.h"
#define PROJLEN 5
#define BUFLEN 128
int select_projects (isc_db_handle db, int emp_no);
int add_emp_proj (isc_db_handle db, int emp_no, char * proj_id);
int get_params (isc_db_handle db, int * emp_no, char * proj_id);
int main (int argc, char** argv)
{
int emp_no;
char proj_id[PROJLEN + 2];
isc_db_handle db = NULL;
ISC_STATUS_ARRAY status;
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)
}
/*
* Add employee with id 8 to project 'MAPDB'.
*/
if (get_params(db, &emp_no, proj_id))
return 1;
/*
* Display employee's current projects.
*/
printf("\nCurrent projects for employee id: %d\n\n", emp_no);
if (select_projects(db, emp_no))
return 1;
/*
* Insert a new employee project row.
*/
printf("\nAdd employee id: %d to project: %s\n", emp_no, proj_id);
if (add_emp_proj(db, emp_no, proj_id))
return 1;
/*
* Display employee's new current projects.
*/
printf("\nCurrent projects for employee id: %d\n\n", emp_no);
if (select_projects(db, emp_no))
return 1;
if (isc_detach_database(status, &db))
{
ERREXIT(status, 1)
}
return 0 ;
}
/*
* Select from a stored procedure.
* Procedure 'get_emp_proj' gets employee's projects.
*/
int select_projects (isc_db_handle db, int emp_no)
{
char proj_id[PROJLEN + 2];
char selstr[BUFLEN];
short flag0 = 0;
isc_tr_handle trans = NULL;
ISC_STATUS_ARRAY status;
isc_stmt_handle stmt = NULL;
XSQLDA *sqlda;
long fetch_stat;
sprintf(selstr, "SELECT proj_id FROM get_emp_proj (%d) ORDER BY proj_id",
emp_no);
sqlda = (XSQLDA *) malloc(XSQLDA_LENGTH(1));
sqlda->sqln = 1;
sqlda->version = 1;
if (isc_start_transaction(status, &trans, 1, &db, 0, NULL))
{
ERREXIT(status, 1)
}
if (isc_dsql_allocate_statement(status, &db, &stmt))
{
ERREXIT(status, 1)
}
if (isc_dsql_prepare(status, &trans, &stmt, 0, selstr, 1, sqlda))
{
ERREXIT(status, 1)
}
sqlda->sqlvar[0].sqldata = (char *) proj_id;
sqlda->sqlvar[0].sqlind = &flag0;
sqlda->sqlvar[0].sqltype = SQL_TEXT + 1;
if (isc_dsql_execute(status, &trans, &stmt, 1, NULL))
{
ERREXIT(status, 1)
}
while ((fetch_stat = isc_dsql_fetch(status, &stmt, 1, sqlda)) == 0)
{
proj_id[PROJLEN] = '\0';
printf("\t%s\n", proj_id);
}
if (fetch_stat != 100L)
{
ERREXIT(status, 1)
}
if (isc_dsql_free_statement(status, &stmt, DSQL_close))
{
ERREXIT(status, 1)
}
if (isc_commit_transaction(status, &trans))
{
ERREXIT(status, 1)
}
free(sqlda);
return 0;
}
/*
* Execute a stored procedure.
* Procedure 'add_emp_proj' adds an employee to a project.
*/
int add_emp_proj (isc_db_handle db, int emp_no, char *proj_id)
{
char exec_str[BUFLEN];
isc_tr_handle trans = NULL;
ISC_STATUS_ARRAY status;
sprintf(exec_str, "EXECUTE PROCEDURE add_emp_proj %d, \"%s\"",
emp_no, proj_id);
if (isc_start_transaction(status, &trans, 1, &db, 0, NULL))
{
ERREXIT(status, 1)
}
if (isc_dsql_execute_immediate(status, &db, &trans, 0, exec_str, 1, NULL))
{
ERREXIT(status, 1)
}
if (isc_commit_transaction(status, &trans))
{
ERREXIT (status, 1)
}
return 0;
}
/*
* Set-up procedure parameters and clean-up old data.
*/
int get_params (isc_db_handle db, int *emp_no, char *proj_id)
{
isc_tr_handle trans = NULL;
ISC_STATUS_ARRAY status;
*emp_no = 8;
strcpy(proj_id, "MAPDB");
/* Cleanup: delete row from the previous run. */
if (isc_start_transaction(status, &trans, 1, &db, 0, NULL))
{
ERREXIT(status, 1)
}
if (isc_dsql_execute_immediate(status, &db, &trans, 0,
"DELETE FROM employee_project \
WHERE emp_no = 8 AND proj_id = 'MAPDB'", 1,
NULL))
{
ERREXIT(status, 1)
}
if (isc_commit_transaction(status, &trans))
{
ERREXIT(status, 1)
}
return 0;
}
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