***********************************************************************
** Licensed Materials - Property of IBM
**
** Governed under the terms of the International
** License Agreement for Non-Warranted Sample Code.
**
** (C) COPYRIGHT International Business Machines Corp. 1995 - 2002
** All Rights Reserved.
**
** US Government Users Restricted Rights - Use, duplication or
** disclosure restricted by GSA ADP Schedule Contract with IBM Corp.
***********************************************************************
**
** SOURCE FILE NAME: openftch.sqb
**
** SAMPLE: How to modify table data using cursor statically
**
** This sample program demonstrates the use of a CURSOR.
** The CURSOR is processed using static SQL. This program
** obtains all managers in the STAFF tables of the SAMPLE
** database and changes their job from "Mgr" to "Clerk"
** or DELETE the row dependant upon the "dept" value.
** A ROLLBACK is done so that the SAMPLE database remains
** unchanged.
**
** SQL STATEMENTS USED:
** BEGIN DECLARE SECTION
** END DECLARE SECTION
** ROLLBACK
** CONNECT
** DECLARE
** FETCH
** OPEN
** DELETE
** UPDATE
** CLOSE
**
** OUTPUT FILE: openftch.out (available in the online documentation)
***********************************************************************
**
** For more information on the sample programs, see the README file.
**
** For information on developing COBOL applications, see the
** Application Development Guide.
**
** For information on using SQL statements, see the SQL Reference.
**
** For the latest information on programming, compiling, and running
** DB2 applications, visit the DB2 application development website:
** http://www.software.ibm.com/data/db2/udb/ad
***********************************************************************
Identification Division.
Program-ID. "openftch".
Data Division.
Working-Storage Section.
copy "sqlca.cbl".
EXEC SQL BEGIN DECLARE SECTION END-EXEC.
01 pname pic x(10).
01 dept pic s9(4) comp-5.
01 userid pic x(8).
01 passwd.
49 passwd-length pic s9(4) comp-5 value 0.
49 passwd-name pic x(18).
EXEC SQL END DECLARE SECTION END-EXEC.
77 errloc pic x(80).
Procedure Division.
Main Section.
display "Sample COBOL program: OPENFTCH".
* Get database connection information.
display "Enter your user id (default none): "
with no advancing.
accept userid.
if userid = spaces
EXEC SQL CONNECT TO sample END-EXEC
else
display "Enter your password : " with no advancing
accept passwd-name.
* Passwords in a CONNECT statement must be entered in a VARCHAR format
* with the length of the input string.
inspect passwd-name tallying passwd-length for characters
before initial " ".
EXEC SQL CONNECT TO sample USER :userid USING :passwd
END-EXEC.
move "CONNECT TO" to errloc.
call "checkerr" using SQLCA errloc.
EXEC SQL DECLARE c1 CURSOR FOR
SELECT name, dept FROM staff
WHERE job='Mgr'
FOR UPDATE OF job END-EXEC.
EXEC SQL OPEN c1 END-EXEC
move "OPEN" to errloc.
call "checkerr" using SQLCA errloc.
* call the FETCH and UPDATE/DELETE loop.
perform Fetch-Loop thru End-Fetch-Loop
until SQLCODE not equal 0.
EXEC SQL CLOSE c1 END-EXEC.
move "CLOSE" to errloc.
call "checkerr" using SQLCA errloc.
EXEC SQL ROLLBACK END-EXEC.
move "ROLLBACK" to errloc.
call "checkerr" using SQLCA errloc.
display "On second thought -- changes rolled back.".
EXEC SQL CONNECT RESET END-EXEC.
move "CONNECT RESET" to errloc.
call "checkerr" using SQLCA errloc.
End-Main.
go to End-Prog.
Fetch-Loop Section.
EXEC SQL FETCH c1 INTO :pname, :dept END-EXEC.
if SQLCODE not equal 0
go to End-Fetch-Loop.
if dept greater than 40
go to Update-Staff.
Delete-Staff.
display pname, " in dept. ", dept,
" will be DELETED!".
EXEC SQL DELETE FROM staff WHERE CURRENT OF c1 END-EXEC.
move "DELETE" to errloc.
call "checkerr" using SQLCA errloc.
go to End-Fetch-Loop.
Update-Staff.
display pname, " in dept. ", dept,
" will be demoted to Clerk".
EXEC SQL UPDATE staff SET job = 'Clerk'
WHERE CURRENT OF c1 END-EXEC.
move "UPDATE" to errloc.
call "checkerr" using SQLCA errloc.
End-Fetch-Loop. exit.
End-Prog.
stop run.
¤ Dauer der Verarbeitung: 0.0 Sekunden
(vorverarbeitet)
¤
|
Haftungshinweis
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung ist noch experimentell.
|
