Converting a blob to clob

Question

Hi,
Has anybody been successful in using the DBMS_LOB.ConvertToClob procedure. It's giving me "invalid lob locator specified" error.
here's my code
create or replace function convert_blob_to_clob(p_file in varchar2) return clob is
v_file_blob blob;
v_file_clob clob;
v_file_size integer := dbms_lob.lobmaxsize;
v_dest_offset integer := 1;
v_src_offset integer := 1;
v_blob_csid number := dbms_lob.default_csid;
v_lang_context number := dbms_lob.default_lang_ctx;
v_warning integer;
begin
select a.blob_content into v_file_blob
from txt_files a
where name = p_file;
dbms_lob.convertToClob(v_file_clob, v_file_blob,v_file_size,
v_dest_offset, v_src_offset, v_blob_csid,
v_lang_context, v_warning);
if v_warning = 0 then
return v_file_clob;
end if;
end;
Any help would be greatly appreciated
Thanks.

Answer 1

I figured it out...
here 's the new code..
create or replace function convert_blob_to_clob(p_file in varchar2) return clob is
v_file_blob blob;
v_file_clob clob;
v_file_size integer := dbms_lob.lobmaxsize;
v_dest_offset integer := 1;
v_src_offset integer := 1;
v_blob_csid number := dbms_lob.default_csid;
v_lang_context number := dbms_lob.default_lang_ctx;
v_warning integer;
begin
select a.blob_content into v_file_blob
from txt_files a
where name = p_file;
-- the following line solved it
DBMS_LOB.CREATETEMPORARY(v_file_clob, TRUE);
dbms_lob.convertToClob(v_file_clob, v_file_blob,v_file_size,
v_dest_offset, v_src_offset, v_blob_csid,
v_lang_context, v_warning);
if v_warning = 0 then
return v_file_clob;
end if;
end;