174 lines
6.4 KiB
HTML
174 lines
6.4 KiB
HTML
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<meta name="DC.Title" content="Example: LOBLOC.SQB in COBOL" />
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<title>Example: LOBLOC.SQB in COBOL</title>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Example: LOBLOC.SQB in COBOL</h1>
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<div><div class="section"><div class="note"><span class="notetitle">Note:</span> By using the code examples, you agree to the terms
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of the <a href="codedisclaimer.htm">Code license and disclaimer information</a>.</div>
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</div>
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<div class="example"> <pre> Identification Division.
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Program-ID. "lobloc".
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Data Division.
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Working-Storage Section.
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copy "sqlenv.cbl".
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copy "sql.cbl".
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copy "sqlca.cbl".
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EXEC SQL BEGIN DECLARE SECTION END-EXEC. <span>1</span>
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01 userid pic x(8).
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01 passwd.
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49 passwd-length pic s9(4) comp-5 value 0.
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49 passwd-name pic x(18).
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01 empnum pic x(6).
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01 di-begin-loc pic s9(9) comp-5.
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01 di-end-loc pic s9(9) comp-5.
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01 resume USAGE IS SQL TYPE IS CLOB-LOCATOR.
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01 di-buffer USAGE IS SQL TYPE IS CLOB-LOCATOR.
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01 lobind pic s9(4) comp-5.
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01 buffer USAGE IS SQL TYPE IS CLOB(1K).
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EXEC SQL END DECLARE SECTION END-EXEC.
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77 errloc pic x(80).
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Procedure Division.
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Main Section.
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display "Sample COBOL program: LOBLOC".
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* Get database connection information.
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display "Enter your user id (default none): "
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with no advancing.
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accept userid.
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if userid = spaces
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EXEC SQL CONNECT TO sample END-EXEC
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else
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display "Enter your password : " with no advancing
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accept passwd-name.
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* Passwords in a CONNECT statement must be entered in a VARCHAR
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* format with the length of the input string.
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inspect passwd-name tallying passwd-length for characters
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before initial " ".
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EXEC SQL CONNECT TO sample USER :userid USING :passwd
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END-EXEC.
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move "CONNECT TO" to errloc.
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call "checkerr" using SQLCA errloc.
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* Employee A10030 is not included in the following select, because
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* the lobeval program manipulates the record for A10030 so that it is
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* not compatible with lobloc
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EXEC SQL DECLARE c1 CURSOR FOR
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SELECT empno, resume FROM emp_resume
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WHERE resume_format = 'ascii'
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AND empno <> 'A00130' END-EXEC.
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EXEC SQL OPEN c1 END-EXEC.
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move "OPEN CURSOR" to errloc.
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call "checkerr" using SQLCA errloc.
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Move 0 to buffer-length.
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perform Fetch-Loop thru End-Fetch-Loop
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until SQLCODE not equal 0.
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* display contents of the buffer.
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display buffer-data(1:buffer-length).
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EXEC SQL FREE LOCATOR :resume, :di-buffer END-EXEC. <span>3</span>
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move "FREE LOCATOR" to errloc.
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call "checkerr" using SQLCA errloc.
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EXEC SQL CLOSE c1 END-EXEC.
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move "CLOSE CURSOR" to errloc.
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call "checkerr" using SQLCA errloc.
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EXEC SQL CONNECT RESET END-EXEC.
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move "CONNECT RESET" to errloc.
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call "checkerr" using SQLCA errloc.
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End-Main.
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go to End-Prog.
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Fetch-Loop Section.
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EXEC SQL FETCH c1 INTO :empnum, :resume :lobind <span>2</span>
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END-EXEC.
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if SQLCODE not equal 0
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go to End-Fetch-Loop.
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* check to see if the host variable indicator returns NULL.
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if lobind less than 0 go to NULL-lob-indicated.
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* Value exists. Evaluate the LOB locator.
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* Locate the beginning of "Department Information" section.
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EXEC SQL VALUES (POSSTR(:resume, 'Department Information'))
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INTO :di-begin-loc END-EXEC.
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move "VALUES1" to errloc.
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call "checkerr" using SQLCA errloc.
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* Locate the beginning of "Education" section (end of Dept.Info)
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EXEC SQL VALUES (POSSTR(:resume, 'Education'))
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INTO :di-end-loc END-EXEC.
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move "VALUES2" to errloc.
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call "checkerr" using SQLCA errloc.
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subtract di-begin-loc from di-end-loc.
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* Obtain ONLY the "Department Information" section by using SUBSTR
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EXEC SQL VALUES (SUBSTR(:resume, :di-begin-loc,
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:di-end-loc))
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INTO :di-buffer END-EXEC.
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move "VALUES3" to errloc.
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call "checkerr" using SQLCA errloc.
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* Append the "Department Information" section to the :buffer var
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EXEC SQL VALUES (:buffer || :di-buffer) INTO :buffer
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END-EXEC.
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move "VALUES4" to errloc.
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call "checkerr" using SQLCA errloc.
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go to End-Fetch-Loop.
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NULL-lob-indicated.
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display "NULL LOB indicated".
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End-Fetch-Loop. exit.
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End-Prog.
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stop run.</pre>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafyexampclob.htm" title="In this example, the application program retrieves a locator for a LOB value; then it uses the locator to extract the data from the LOB value.">Example: Use a locator to work with a CLOB value</a></div>
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</div>
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</div>
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</body>
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