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/*******************************************************
**
** A sample program that demonstrates the use of Static embedded SQL.
** Before compiling this program, be sure you have created a table
** called video and inserted some tuples in it.
**
********************************************************/
#include <stdio.h>
/* sqlca: is the sql communications area. All error codes
are returned from db2 in that structure which is filled
each time an interaction with db2 takes place.
*/
EXEC SQL INCLUDE SQLCA; /* SQL communication area structure */
EXEC SQL BEGIN DECLARE SECTION; /* declare host variables */
char db_name[8]; /* database name */
char video_title[30]; /* title of the video */
short video_id; /* serial number */
char director[20]; /* director name */
EXEC SQL END DECLARE SECTION;
/* These lines are redundant here because the default
action is to continue. They just show the kind of
errors that could arise and one way to control them.
*/
EXEC SQL WHENEVER SQLWARNING CONTINUE; /* sqlca.sqlcode > 0 */
EXEC SQL WHENEVER SQLERROR CONTINUE; /* sqlca.sqlcode < 0 */
EXEC SQL WHENEVER NOT FOUND CONTINUE; /* sqlca.sqlcode = 100 */
/* sqlca.sqlcode = 0 (no error) */
void main() {
strcpy(db_name, "csc343h");
/* C variables are preceded by a colon when they are passed to DB2 */
EXEC SQL CONNECT TO :db_name;
if (sqlca.sqlcode != 0) {
printf("Connect failed!: reason %ld\n", sqlca.sqlcode);
exit(1);
}
/* cursor delcaration. Have to declare a cursor each time you
want tuples back from db2
*/
EXEC SQL DECLARE c1 CURSOR FOR
SELECT video_title
FROM video;
/* you have to open the cursor in order to get tuples back */
EXEC SQL OPEN c1;
do {
/* fetch tuples from the cursor. This will execute the statement
the cursor implements and will return the results */
EXEC SQL FETCH c1 into :video_title;
if (SQLCODE != 0) break; /* SQLCODE refers to sqlca.sqlcode */
/* host variables should have ':' prefix when they are used in DB2 commands */
printf("%s\n",video_title);
} while (1);
EXEC SQL CLOSE c1;
EXEC SQL CONNECT RESET;
}
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