Reading an invocation payload from BPEL

Question

Hi,
I was wondering if anyone had successfully managed to read an XML payload from the BPEL dehydration store?
I have a requirement to replay 4hrs of messages from BPEL in the event of a catastrophic failure on a subscribing system. I can't find any documentation on any out of the box functionality to do this.
I know the payload of the messages are stored in the dehydration store in the table XML_DOCUMENT as BLOBs but I can't seem to read the data as a string.
Im running the following query
SELECT utl_raw.cast_to_varchar2(dbms_lob.substr(bin,5000,1)) FROM xml_document
Does anybody have any ideas? or has anyone done anything similar?

Answer 1

Hi,
Got this from a colleague:
create table instance_log
cikey integer,
detail_id integer,
xml xmltype
declare
l_clob clob;
l_dest_offset integer;
l_src_offset integer;
l_lang_context integer;
l_warning integer;
begin
for r_ins in (select cikey,
detail_id,
utl_compress.lz_uncompress(bin) bin
from audit_details
where bin is not null
loop
l_dest_offset := 1;
l_src_offset := 1;
l_lang_context := dbms_lob.default_lang_ctx;
dbms_lob.createtemporary(l_clob,true);
dbms_lob.converttoclob
( dest_lob => l_clob,
src_blob => r_ins.bin,
amount => dbms_lob.getlength(r_ins.bin),
dest_offset => l_dest_offset,
src_offset => l_src_offset,
blob_csid => 1,
lang_context => l_lang_context,
warning => l_warning
insert into instance_log
cikey,
detail_id,
xml
values
r_ins.cikey,
r_ins.detail_id,
xmltype(l_clob)
end loop;
commit;
end;
Apparently the row: utl_compress.lz_uncompress(bin) bin does do the trick.
Keep in mind though that querying on this value (searching for instances based on data in this column) will result in full-table-scans.
Regards,
Martien