This is 12.2 EE on OL 7.7, with July 2019 PSU applied. User is running a
report from a view, let's call it VW, and it is horribly slow. The
report is written using Cognos and the developer says it is carved in
stone and cannot be changed before the next millennium, invoking dirty
language like "release process", "change control","ticket" and "peer
review", which would take forever and a day.
I created a materialized view, let's call it MV_VW, with the exactly the
same query as the view but when I do something like:
select /*+ rewrite(MV_VW) */ count(*) from VW
it is not getting rewritten. I even tried putting in merge hint, to
merge the view text with the query and then have it all rewritten. Query
rewrite enabled is in the MV creation and query_rewrite_enabled=force is
set on the session level. Is there anything I can do, short of
manipulating the baseline?
--
Mladen Gogala
Database Consultant
Tel: (347) 321-1217
--
//www.freelists.org/webpage/oracle-l
