Using a procedure to read from CLOB

Question

Hi folks,
I insert a dataset into a table using the following procedure:
<CODE>
CREATE OR REPLACE PROCEDURE WRITE_KATALOGTEXT(IN_DOKUID CHAR,
IN_ARTNR
NUMBER, IN_TEXT VARCHAR2, IN_DATUM DATE) IS
LOB_LOC CLOB;
BEGIN
INSERT INTO TEXTCASTOR (DOKUID, ARTNR, TEXT, DATUM) VALUES
(IN_DOKUID,
IN_ARTNR, EMPTY_CLOB(), IN_DATUM);
COMMIT;
SELECT TEXT INTO LOB_LOC FROM TEXTCASTOR
WHERE DOKUID=IN_DOKUID AND ARTNR=IN_ARTNR AND DATUM=IN_DATUM FOR
UPDATE;
DBMS_LOB.WRITE (LOB_LOC, length(IN_TEXT), 1, IN_TEXT);
COMMIT;
END;
</CODE>
After this insert I try to read from the table using the
following Procedure
<CODE>
CREATE OR REPLACE FUNCTION GET_KATALOGTEXT(IN_ARTNR NUMBER) RETURN
VARCHAR2 IS
BUFFER CLOB;
MY_RETURNVALUE VARCHAR2(32767);
MY_ARTNR NUMBER(6):=IN_ARTNR;
BEGIN
SELECT TEXT INTO BUFFER FROM WORKFLOWOWNER.TEXTCASTOR
WHERE ARTNR=MY_ARTNR;
MY_RETURNVALUE:=DBMS_LOB.SUBSTR(BUFFER, 32767, 1);
RETURN MY_RETURNVALUE;
END;
</CODE>
My problem is, that I get the Oracle Error ORA-06502.
It says, that the String buffer is too small if the length of the
CLOB exceeds 4k.
Writing works with values having a length of over fourthousand
characters.
Reading only works with values having a length of less than
fourthousand characters.
Has anyone a clue how to handle this?
Greetings
Markus

Answer 1

Hi,
In the First Proc u'r not Updating the Data with that Clob valu u'r writing ... I donot Know if this is u'r Actuall Proc or it is a Proc that has been minimized.
As Regards the Second function the function seems to be okay. Are u trying to call this function thru a SQL Stmt. Then this will not work.
What u need to do is to write a PL/SQL Block and call it. In SQL the Varchar2 can Only Hold 4000 Bytes and nothing more than that.
Hope this helps.
Regards,
Ganesh R