CLOB.getAsciiStream problem in 11gR2 with temp CLOB internal JVM

Question

Hello,
i have a problem with using a termporary CLOB in PL/SQL that is going to be written with Java Code that runs inside Oracle Database (Internal JVM). The code works without problem in Oracle 11g R1 (11.1.0.7.0) but does not with Oracle 11g R2 (12.2.0.1.0). The example follows:
<b>Table Description:</b>
NAME Null? Type
ID NOT NULL NUMBER(*,0)
FILE_TYPE NOT NULL NUMBER(*,0)
INSERT_DATE NOT NULL DATE
PROCESSED NOT NULL NUMBER(*,0)
LFIELD001 CLOB(4000)
BFIELD001 BLOB(4000)
FILE_NAME VARCHAR2(4000)
<b>PL/SQL Example Run:</b>
DECLARE
clb CLOB;
p_result NUMBER; p_err VARCHAR2(4000);
t BLOB;
BEGIN
SELECT bfield001
INTO t
FROM file_data
WHERE id = 200;
clb := java_utils.clob_zipdecompress(t, 'BANKFILE_', p_result);
-- Output the results
dbms_output.put_line(SubStr('p_result = '||TO_CHAR(p_result), 1, 255));
dbms_output.put_line(SubStr('p_err = '||p_err, 1, 255));
dbms_output.put_line(SubStr('p_return_clob = '||SUBSTR(clb, 1,255), 1, 255));
END;
<b>Package example </b>
PACKAGE JAVA_UTILS
IS
-- Decompress a BLOB in ZIP format to a CLOB and return it with specified contained filename
FUNCTION clob_zipdecompress(p_blob IN BLOB, p_fname IN VARCHAR2, p_result OUT NUMBER)
RETURN CLOB;
END JAVA_UTILS;
PACKAGE BODY JAVA_UTILS
IS
-- Decompress a BLOB in ZIP format to a CLOB and return it with specified contained filename
FUNCTION clob_zipdecompress(p_blob IN BLOB, p_clob IN CLOB, p_fname IN VARCHAR2)
RETURN NUMBER
AS LANGUAGE JAVA NAME 'java_utils.Compress.ZipDecompress(oracle.sql.BLOB, oracle.sql.CLOB, java.lang.String) return int';
FUNCTION clob_zipdecompress(p_blob IN BLOB, p_fname IN VARCHAR2, p_result OUT NUMBER)
RETURN CLOB
IS
l_clob CLOB; l_result NUMBER;
BEGIN
IF p_blob IS NULL THEN
RETURN NULL;
END IF;
DBMS_LOB.createtemporary(l_clob, TRUE);
p_result := clob_zipdecompress(p_blob, l_clob, p_fname);
RETURN l_clob;
END clob_zipdecompress;
END JAVA_UTILS;
<b>Java Function Example simplified </b>
package java_utils;
import java.lang.*;
import oracle.sql.*;
import java.io.*;
import java.util.zip.*;
public class Compress
* Decompresses the BLOB into CLOB
* @param blob the source BLOB (compressed binary data)
* @param clob the target CLOB (will hold plain text) it should be an empty CLOB retrieved for
example with dbms_lob.createtemporary(l_clob,true);
* @throws Exception mostly I/O exception if ever
public static int ZipDecompress(BLOB blob, CLOB clob, String fname, String[] err)
OutputStream out; ZipInputStream z; ZipEntry ze; String zeName; byte[] buffer; int cnt;
boolean found = false;
try {
out = clob.setAsciiStream(0L); // Here it fails
catch (Exception ex) { err[0] = ex.getMessage(); return -1; }
return 0;
The execution of the example works well in 11gR1 but in 11gR2 returns error : <b>Invalid argument(s) in call. </b>
Any idea why this is happening?
Any help will be appreciated.
Dionyssis

Answer 1

Hi Dionyssis:
Replace:
clob.setAsciiStream(0L); // Here it fails
by:
clob.setAsciiStream(1L);
the CLOB Api was changed from early implementation of Oracle to the standard implementation.
HTH, Marcelo.