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Datei:
P5.cob
Sprache: Unknown
***********************************************************************
** 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: joinsql.sqb
**
** SAMPLE: An example using advanced SQL join expressions
**
** The advanced SQL statement to be executed and displayed is:
**
** WITH
** DEPT_MGR AS
** ( SELECT DEPTNO, DEPTNAME, EMPNO, LASTNAME, FIRSTNME,
** PHONENO FROM DEPARTMENT D, EMPLOYEE E
** WHERE D.MGRNO=E.EMPNO AND E.JOB='MANAGER'
** ),
** DEPT_NO_MGR AS
** ( SELECT DEPTNO, DEPTNAME, MGRNO AS EMPNO
** FROM DEPARTMENT
** EXCEPT ALL
** SELECT DEPTNO, DEPTNAME, EMPNO
** FROM DEPT_MGR
** ),
** MGR_NO_DEPT (DEPTNO, EMPNO, LASTNAME, FIRSTNME, PHONENO) AS
** ( SELECT WORKDEPT, EMPNO, LASTNAME, FIRSTNME, PHONENO
** FROM EMPLOYEE
** WHERE JOB='MANAGER'
** EXCEPT ALL
** SELECT DEPTNO,EMPNO, LASTNAME, FIRSTNME, PHONENO
** FROM DEPT_MGR
** )
** SELECT DEPTNO, DEPTNAME, EMPNO, LASTNAME, FIRSTNME, PHONENO
** FROM DEPT_MGR
** UNION ALL
** SELECT DEPTNO, DEPTNAME, EMPNO,
** CAST(NULL AS VARCHAR(15)) AS LASTNAME,
** CAST(NULL AS VARCHAR(12)) AS FIRSTNME,
** CAST(NULL AS CHAR(4)) AS PHONENO
** FROM DEPT_NO_MGR
** UNION ALL
** SELECT DEPTNO,
** CAST(NULL AS VARCHAR(29)) AS DEPTNAME,
** EMPNO, LASTNAME, FIRSTNME, PHONENO
** FROM MGR_NO_DEPT;
**
** SQL STATEMENTS USED:
** BEGIN DECLARE SECTION
** END DECLARE SECTION
** CONNECT
** DECLARE
** FETCH
** OPEN
**
** OUTPUT FILE: joinsql.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. "joinsql".
Data Division.
Working-Storage Section.
copy "sqlenv.cbl".
copy "sql.cbl".
copy "sqlca.cbl".
EXEC SQL BEGIN DECLARE SECTION END-EXEC.
01 userid pic x(8).
01 passwd.
49 passwd-length pic s9(4) comp-5 value 0.
49 passwd-name pic x(18).
01 deptno pic x(3).
01 d-ind pic s9(4) comp-5 value 0.
01 deptname pic x(29).
01 dn-ind pic s9(4) comp-5 value 0.
01 empno pic x(6).
01 e-ind pic s9(4) comp-5 value 0.
01 lastname.
49 lastname-len pic s9(4) comp-5 value 15.
49 lastname-name pic x(15).
01 l-ind pic s9(4) comp-5 value 0.
01 firstname.
49 firstname-len pic s9(4) comp-5 value 12.
49 firstname-name pic x(12).
01 f-ind pic s9(4) comp-5 value 0.
01 phoneno pic x(4).
01 p-ind pic s9(4) comp-5 value 0.
EXEC SQL END DECLARE SECTION END-EXEC.
77 errloc pic x(80).
77 counter pic s9(4) comp-5 value 0.
Procedure Division.
Main Section.
display "Sample COBOL program: JOINSQL".
* 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 " ".
display " ".
EXEC SQL CONNECT TO sample USER :userid USING :passwd
END-EXEC.
move "CONNECT TO" to errloc.
call "checkerr" using SQLCA errloc.
* declare the cursor for the advanced SQL statement.
EXEC SQL DECLARE c1 CURSOR FOR
WITH
DEPT_MGR AS
(SELECT DEPTNO, DEPTNAME, EMPNO, LASTNAME, FIRSTNME,
PHONENO FROM DEPARTMENT D, EMPLOYEE E
WHERE D.MGRNO=E.EMPNO AND E.JOB='MANAGER'),
DEPT_NO_MGR AS
(SELECT DEPTNO, DEPTNAME, MGRNO AS EMPNO
FROM DEPARTMENT EXCEPT ALL
SELECT DEPTNO, DEPTNAME, EMPNO FROM DEPT_MGR),
MGR_NO_DEPT (DEPTNO, EMPNO, LASTNAME, FIRSTNME,
PHONENO) AS
(SELECT WORKDEPT, EMPNO, LASTNAME, FIRSTNME,
PHONENO FROM EMPLOYEE
WHERE JOB='MANAGER' EXCEPT ALL
SELECT DEPTNO,EMPNO, LASTNAME, FIRSTNME, PHONENO
FROM DEPT_MGR)
SELECT DEPTNO, DEPTNAME, EMPNO, LASTNAME, FIRSTNME,
PHONENO FROM DEPT_MGR
UNION ALL
SELECT DEPTNO, DEPTNAME, EMPNO,
CAST(NULL AS VARCHAR(15)) AS LASTNAME,
CAST(NULL AS VARCHAR(12)) AS FIRSTNME,
CAST(NULL AS CHAR(4)) AS PHONENO
FROM DEPT_NO_MGR END-EXEC.
EXEC SQL OPEN c1 END-EXEC.
move "OPEN" to errloc.
call "checkerr" using SQLCA errloc.
display "DEPTNO DEPTNAME EMPNO LASTNAME
- " FIRSTNAME PHONENO".
display "====================================================
- "=========================".
* FETCH the rows from the table corresponding to the SQL statement.
perform Fetch-Loop thru End-Fetch-Loop
until SQLCODE not equal 0.
display " ", counter, " record(s) selected".
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.
move spaces to phoneno.
EXEC SQL FETCH c1 INTO :deptno:d-ind, :deptname:dn-ind,
:empno:e-ind, :lastname:l-ind, :firstname:f-ind,
:phoneno:p-ind END-EXEC.
if SQLCODE not equal 0
display " "
go to End-Fetch-Loop.
if l-ind not equal 0
move " " to lastname-name
move 1 to lastname-len.
if f-ind not equal 0
move " " to firstname-name
move 1 to firstname-len.
display deptno, " ", deptname, " ", empno, " ",
lastname-name(1:lastname-len), " ",
firstname-name(1:firstname-len), " ", phoneno.
add 1 to counter.
End-Fetch-Loop. exit.
End-Prog.
stop run.
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