Use of NOCOPY indicator simple no nested procedure

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  --------------------------------------------------------------------------------
  Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
  PL/SQL Release 11.2.0.3.0 - Production
  CORE    11.2.0.3.0      Production
  TNS for Linux: Version 11.2.0.3.0 - Production
  NLSRTL Version 11.2.0.3.0 - Production
  
  

  I'm a PL/SQL programmer, but not a Java programmer. I have the following java function that does what it's supposed to add a pdf at the end of another pdf document:

  import oracle.sql.BLOB;
  import org.apache.pdfbox.util.PDFMergerUtility;
  import oracle.jdbc.OracleConnection;
  import oracle.jdbc.driver.OracleDriver;
  import java.io.OutputStream;
  
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          //create a connection object to the current instance
            OracleConnection conn = (OracleConnection)new OracleDriver().defaultConnection();
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            mergerUtility.addSource(pdfdoc2.getBinaryStream());
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          //do not close the output stream
          //return the blob
          return outPDF;
      }
  
  }
  

  CREATE OR REPLACE package PDFTOOLS.pkg_pdf_utilities
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            pi_pdf1       blob
          , pi_pdf2    blob
    )
    return blob;
  end pkg_pdf_utilities;
  /
  
  CREATE OR REPLACE package body PDFTOOLS.pkg_pdf_utilities
  as
  function f_get_merged_pdf (
            pi_pdf1       blob
          , pi_pdf2    blob
    )
    return blob
    as language java name 
    'com.mycode.pdftools.PDFUtilities.appendPDF(oracle.sql.BLOB, oracle.sql.BLOB) return oracle.sql.BLOB';
  end PDFTOOLS.pkg_pdf_utilities;
  /
  

  It's very basic, but doesn't seem to work. However, I want to my function from PL/SQL to a procedure that looks like this:

  CREATE OR REPLACE package PDFTOOLS.pkg_pdf_utilities
  as
  procedure sp_append_pdf (
            pio_pdf2append2   IN OUT NOCOPY blob
          , pio_pdf2append   IN OUT NOCOPY blob
    )
  end pkg_pdf_utilities;
  /
  

  What is important, what I'm trying to do is to NOCOPY the BLOBs. Otherwise, I have to read my PDF files into 2 BLOBs and create a 3rd blob as output. I prefer to be able to keep the pio_pdf2append2 as the final output. What I actually do call thing in a loop to gradually add a PDF file to a big. I'm not linking this in one operation because of concerns over the use of the system and because the pdfbox library java has would have been question after 850 in PDF format, which is not completely unrealistic in my approach.

  How could I achieve this?

  Post edited by: Pollocks01 only formatted code blocks because atlassian {code} tags didn't work.

  Passage of an argument as input/OUTPUT requires the mapping to a Java array.

  Simplified example that adds one FOR the other:

  create or replace and compile java source named blob_appender_src as
  import oracle.sql.BLOB;
  import java.sql.SQLException;
  import java.io.OutputStream;
  import java.io.InputStream;
  import java.io.IOException;
  
  public class BLOBAppender {
      public static void run (BLOB[] p1, BLOB p2) throws SQLException, IOException { 
  
          InputStream is = p2.getBinaryStream();
          OutputStream os = p1[0].setBinaryStream(p1[0].length()+1);                
  
          byte[] buffer = new byte[1024];
          int len;
          while ((len = is.read(buffer)) != -1) {
              os.write(buffer, 0, len);
          }
          os.close();
          is.close();
      }
  }
  

  create or replace procedure blob_append (
    p_lob1  in out nocopy blob
  , p_lob2  in            blob
  )
  as language java name 'BLOBAppender.run(oracle.sql.BLOB[], oracle.sql.BLOB)' ;
  /
  

  SQL> declare
    2    p_lob1  blob := utl_raw.cast_to_raw('ABC');
    3    p_lob2  blob := utl_raw.cast_to_raw('DEF');
    4  begin
    5    blob_append(p_lob1, p_lob2);
    6    dbms_output.put_line(utl_raw.cast_to_varchar2(p_lob1));
    7  end;
    8  /
  
  ABCDEF
  
  PL/SQL procedure successfully completed.
  

• image appears in 11 GR 2 with simple pl/sql procedure

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  (Images) CREATE TABLE

  ID NUMBER (10) NOT NULL,

  name VARCHAR2 (50) NOT NULL,

  the image BLOB NOT NULL

  )

  
  

  CREATE or REPLACE PACKAGE images_api AS

  Charge of the PROCEEDINGS (p_name IN images.name%TYPE);

  Get (p_name IN images.name%TYPE PROCEDURE,

  p_type IN VARCHAR2 DEFAULT 'gif');

  PROCEDURE get_gif (p_name IN images.name%TYPE);

  PROCEDURE get_jpeg (p_name IN images.name%TYPE);

  END;

  /

  
  

  CREATE or REPLACE PACKAGE BODY images_api AS

  Charge of the PROCEDURE (p_name IN images.name%TYPE) IS

  v_bfile BFILE.

  v_blob BLOB;

  BEGIN

  INSERT INTO images (id, name, image)

  VALUES (images_seq. NEXTVAL, p_name, EMPTY_BLOB())

  TURN the image INTO v_blob.

  v_bfile: = BFILENAME ('IMAGE_DIR', p_name);

  DBMS_LOB. FileOpen (v_bfile, DBMS_LOB.file_readonly);

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  DBMS_LOB. FileClose (v_bfile);

  COMMIT;

  EXCEPTION

  WHILE OTHERS THEN

  ROLLBACK;

  LIFT;

  END;

  Get (p_name IN images.name%TYPE PROCEDURE,

  p_type IN VARCHAR2 DEFAULT 'gif') IS

  v_blob BLOB;

  BEGIN

  CHOOSE the image

  IN v_blob

  Images

  WHERE name = p_name;

  OWA_UTIL.mime_header ("image /" | p_type);

  -Start, 9i method.

  DECLARE

  v_amt NUMBER: = 30;

  v_off NUMBER: = 1;

  v_raw RAW (4096);

  BEGIN

  LOOP

  DBMS_LOB. Read (v_blob, v_amt, v_off, v_raw);

  HTP.prn (UTL_RAW.cast_to_varchar2 (v_raw));

  v_off: = v_off + v_amt;

  v_amt: = 4096;

  END LOOP;

  EXCEPTION

  WHEN NO_DATA_FOUND THEN

  NULL;

  END;

  -End 9i method.

  -10g method.

  -WPG_DOCLOAD.download_file (l_blob);

  END;

  PROCEDURE get_gif (p_name IN images.name%TYPE) IS

  BEGIN

  get (p_name, "gif");

  END;

  PROCEDURE get_jpeg (p_name IN images.name%TYPE) IS

  BEGIN

  get (p_name, "jpeg");

  END;

  END;

  
  

  Hi Topas.

  I could be wrong, but this looks a bit like:

  (1) your character set of the client (in this case, mod_plsql) is different from the database character set

  (2) that the Content-Length which is calculated 'automatically' by something somewhere is incorrect.

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