Create Java on Oracle database with JDBC

Question

I\'m trying to create a Java source object on an oracle database using JDBC.

The source I want to create is the following:

create or replace and reso         


        

Answer 1

Please post a complete thorough example. Your code is working, following is the result on my 11.1.0.7.0 db. First the setup:

SQL> create or replace directory TMP as '/tmp';

Directory created

SQL> CREATE TABLE testBlob (a BLOB);

Table created

SQL> INSERT INTO testBlob VALUES (utl_raw.cast_to_raw('StackOverflow'));

1 row inserted

The first function:

SQL> CREATE OR REPLACE FUNCTION blob2File(p_blob BLOB,
  2                                       p_path VARCHAR2,
  3                                       p_buffer NUMBER)
  4    RETURN NUMBER AS
  5  LANGUAGE JAVA NAME
  6     'dbjava.BlobIO.blobToFile(java.sql.Blob,
  7                               java.lang.String,
  8                               int) return int';
  9  /

Function created

SQL> DECLARE
  2     l_blob   BLOB;
  3     l_return INT;
  4  BEGIN
  5     SELECT * INTO l_blob FROM testBlob;
  6     l_return := blob2File(l_blob, '/tmp/test.blob', 1024);
  7     dbms_output.put_line(l_return);
  8  END;
  9  /

1

For the second function:

SQL> CREATE OR REPLACE FUNCTION queryBlob2File(p_query VARCHAR2,
  2                                            p_path VARCHAR2,
  3                                            p_buffer NUMBER) RETURN NUMBER AS
  4  LANGUAGE JAVA NAME
  5     'dbjava.BlobIO.blobToFile(java.lang.String,
  6                               java.lang.String,
  7                               int) return int';
  8  /

Function created

SQL> DECLARE
  2     l_query  VARCHAR2(1000);
  3     l_return INT;
  4  BEGIN
  5     l_query := 'SELECT * FROM testBlob';
  6     l_return := queryBlob2File(l_query, '/tmp/test.blob', 1024);
  7     dbms_output.put_line(l_return);
  8  END;
  9  /

1

PL/SQL procedure successfully completed

You can use the UTL_FILE package to deal with files directly in PL/SQL:

SQL> DECLARE
  2     l_file utl_file.file_type;
  3     l_line VARCHAR2(1024);
  4  BEGIN
  5     l_file := utl_file.fopen(location => 'TMP',
  6                              filename => 'test.blob',
  7                              open_mode => 'R');
  8     utl_file.get_line(l_file, l_line);
  9     dbms_output.put_line(l_line);
 10     utl_file.fclose(l_file);
 11  END;
 12  /

StackOverflow

Answer 2

Ok found the problem eventually, it needed to be CallableStatement with setEscapeProcessing(false).