*********************************************************************** ** 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. 1998 - 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: lobloc.sqb ** ** SAMPLE: Demonstrates the use of LOB locators ** ** This sample program demonstrates the use of LOB ** locators. The program creates a CURSOR, and fetches the ** contents of the "emp_resume" table (the SAMPLE database ** must be installed with the "db2sampl" executable), and ** obtains the information specified to the "Department". ** This informations is then copied over to a buffer. ** After the whole table has been scanned, the program ** outputs the content of the buffer (information specific ** to the "department" for all the resumes in the ** "emp_resume" table. ** ** SQL STATEMENTS USED: ** BEGIN DECLARE SECTION ** END DECLARE SECTION ** FREE LOCATOR ** CONNECT ** DECLARE ** VALUES ** FETCH ** CLOSE ** OPEN ** ** OUTPUT FILE: lobloc.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 ***********************************************************************
EXECSQL BEGIN DECLARE SECTIONEND-EXEC.
01 userid pic x(8).
01 passwd.
49 passwd-length pic s9(4) comp-5value 0.
49 passwd-name pic x(18).
01 empnum pic x(6).
01 di-begin-loc pic s9(9) comp-5.
01 di-end-loc pic s9(9) comp-5.
01 resume USAGEISSQL TYPE IS CLOB-LOCATOR.
01 di-buffer USAGEISSQL TYPE IS CLOB-LOCATOR.
01 lobind pic s9(4) comp-5.
01 buffer USAGEISSQL TYPE IS CLOB(1K). EXECSQLEND DECLARE SECTIONEND-EXEC.
77 errloc pic x(80).
ProcedureDivision.
Main Section. display"Sample COBOL program: LOBLOC".
* Get database connection information. display"Enter your user id (default none): " withnoadvancing. accept userid.
if userid = spaces EXECSQL CONNECT TO sample END-EXEC else display"Enter your password : "withnoadvancing 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 beforeinitial" ".
EXECSQL CONNECT TO sample USER :userid USING :passwd END-EXEC. move"CONNECT TO"to errloc. call"checkerr"using SQLCA errloc.
* Employee A10030 is not included in the following select, because * the lobeval program manipulates the record for A10030 so that it is * not compatible with lobloc
EXECSQL DECLARE c1 CURSOR FOR SELECT empno, resume FROM emp_resume
WHERE resume_format = 'ascii' AND empno <> 'A00130'END-EXEC.
Fetch-Loop Section. EXECSQL FETCH c1 INTO :empnum, :resume :lobind END-EXEC.
if SQLCODE notequal 0 goto End-Fetch-Loop.
* check to see if the host variable indicator returns NULL. if lobind lessthan 0 goto NULL-lob-indicated.
* Value exists. Evaluate the LOB locator. * Locate the beginning of "Department Information" section. EXECSQL VALUES (POSSTR(:resume, 'Department Information')) INTO :di-begin-loc END-EXEC. move"VALUES1"to errloc. call"checkerr"using SQLCA errloc.
* Locate the beginning of "Education" section (end of Dept.Info) EXECSQL VALUES (POSSTR(:resume, 'Education')) INTO :di-end-loc END-EXEC. move"VALUES2"to errloc. call"checkerr"using SQLCA errloc.
subtract di-begin-loc from di-end-loc.
* Obtain ONLY the "Department Information" section by using SUBSTR EXECSQL VALUES (SUBSTR(:resume, :di-begin-loc,
:di-end-loc)) INTO :di-buffer END-EXEC. move"VALUES3"to errloc. call"checkerr"using SQLCA errloc.
* Append the "Department Information" section to the :buffer var EXECSQL VALUES (:buffer || :di-buffer) INTO :buffer END-EXEC. move"VALUES4"to errloc. call"checkerr"using SQLCA errloc.
goto End-Fetch-Loop.
NULL-lob-indicated. display"NULL LOB indicated".
End-Fetch-Loop. exit.
End-Prog. stoprun.
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