Oracle BFILE备忘

创建目录
create or replace directory exp_dir as '/tmp';
赋权
grant read, write on directory exp_dir to PUBLIC;

测试写文件
    declare
      fhandle utl_file.file_type;
    begin
      fhandle := utl_file.fopen('exp_dir', 'example.txt', 'w');
      utl_file.put_line(fhandle , 'eygle test write one');
      utl_file.put_line(fhandle , 'eygle test write two');
      utl_file.fclose(fhandle);
    end;
    /
测试读取文件
 declare
    fhandle   utl_file.file_type;
    fp_buffer varchar2(4000);
  begin
    fhandle := utl_file.fopen ('exp_dir','example.txt', 'R');  

    utl_file.get_line (fhandle , fp_buffer );
    dbms_output.put_line(fp_buffer );
    utl_file.get_line (fhandle , fp_buffer );
     dbms_output.put_line(fp_buffer );
     utl_file.fclose(fhandle);
   end;
   /

可以查询dba_directories查看所有directory.
SQL> select * from dba_directories;

可以使用drop directory删除这些路径.
SQL> drop directory exp_dir;