Inserting Blob in PL/SQL using select from other table

Question

Oracle 11.1.7.0:
I am trying to insert blob column as defined below but not able to. Is this the right way of inserting blobs?
set serveroutput on
spool a.dat
DECLARE
BEGIN
  for i in 1..2
  loop
     for j in  (select r_payload                      
                   from fp_data where payload_id=331525112)
     loop
       EXECUTE IMMEDIATE 'insert into fp_data (r_payload) values ( ' || j.r_payload || ')';
    end loop;
  end loop;
  rollback;
END;
exit;

Answer 1

BLOB work same a CLOB
SQL> @clob
SQL> drop table toto;
SQL> create table toto (
  2    A  VARCHAR2 (30)  NOT NULL,
  3    B  VARCHAR2 (30)  NOT NULL,
  4    C  clob default empty_clob()
  5  )
  6        lob(c) store as toto_name_lo(disable storage in row)
  7  ;
SQL>
SQL> set feedback off
SQL> set timing on;
SQL> prompt
SQL> prompt Insert lob with enabled storage in row:
Insert lob with enabled storage in row:
SQL> insert into toto (a, b, c)
  2  select owner a, object_name b, owner || ' ' || object_name c from all_objects
  3  where rownum < 10
  4  ;
Elapsed: 00:00:00.51
SQL> set timing off;
SQL> select a,b from toto;
A                      B
SYS                      ICOL$
SYS                      I_USER1
SYS                      CON$
SYS                      UNDO$
SYS                      C_COBJ#
SYS                      I_OBJ#
SYS                      PROXY_ROLE_DATA$
A                      B
SYS                      I_IND1
SYS                      I_CDEF2
SQL> drop   table fp_data;
SQL> create table fp_data (r_payload clob);
SQL> insert into fp_data select c from toto where a = 'SYS'     AND B = 'I_IND1';
SQL> select count(*) from fp_data;
  COUNT(*)
      1no need for PL/SQL