long raw to pdf - sql

Question

good afternoon,
I am in need of help to read a field in the Oracle database.
I have a long raw field that contains a pdf and I need to save it to a file.
Does anyone have any suggestions on how I can do it?

Answer 1

If you have access to Oracle Support, there is an example in Doc ID 1433573.1
Sample Procedure
CREATE OR REPLACE PROCEDURE WritePDFToFILE (myfilename IN VARCHAR2)
IS
v_blob BLOB;
blob_length INTEGER;
out_file UTL_FILE.FILE_TYPE;
-- chunk size and buffer size must match
chunk_size BINARY_INTEGER := 32767;
v_buffer RAW (32767);
blob_position INTEGER := 1;
BEGIN
-- Retrieve the BLOB for reading
SELECT filedata
INTO v_blob
FROM blob_pdf_tbl
WHERE filename = myfilename;
-- Retrieve the SIZE of the BLOB
blob_length := DBMS_LOB.GETLENGTH (v_blob);
-- Open a handle to the location where you are going to write the BLOB to a file
-- NOTE: The 'wb' parameter means "write in byte mode" and is only availabe
-- in the UTL_FILE package with Oracle 10g or later
out_file :=
UTL_FILE.FOPEN ('PDF_DIR_LOC',
myfilename,
'wb',
chunk_size);
-- Write the BLOB to file in chunks
WHILE blob_position <= blob_length
LOOP
IF blob_position + chunk_size - 1 > blob_length
THEN
chunk_size := blob_length - blob_position + 1;
END IF;
DBMS_LOB.READ (v_blob,
chunk_size,
blob_position,
v_buffer);
UTL_FILE.PUT_RAW (out_file, v_buffer, TRUE);
blob_position := blob_position + chunk_size;
END LOOP;
-- Close the file handle
UTL_FILE.FCLOSE (out_file);
END;
/