What Feature TimesTen does not support??

Question

Hi Chris, I am runing following query in TimesTen and it is giving me error 843
select com_link_id from msg_ord_lock where locked_cads = 'N' AND IN_OUT = 'O' and locked_cads_time <= (select min(locked_cads_time) from msg_ord_lock where locked_cads = 'N' AND IN_OUT = 'O') FOR UPDATE NOWAIT
Error: 843: Select ... For Update used with subqueries is not supported
Can you confirm that SELECT for Update with Subqueries is not supported.
For 7.0.1.0.0 It says following feature is depricated and will be removed from later releases.
SELECT FOR UPDATE ON ORACLE SQL statement
Does this mean SELECT FOR UPDATE will not work in TimesTen after 7.0.1.0.0 ??

Answer 1

Just to clarify Susan's reply a little.
1. It is correct that you cannot use SELECT FOR UPDATE with a subquery. This is currently a limitation in TimesTen.
2. The SELECT FOR UPDATE ON ORACLE statement is a special form of SELECT FOR UPDATE used with the TimesTen Cache Connect feature to 'pass through' the update locks to also lock the rows in oracle. This woul mainly be used when using the PROPAGATE synchronous commit option and/or the FLUSH CACHE GROUP option. It is completely separate from the regular SELECT FOR UPDATE against TimesTen tables. We have deprecated the SELECT FOR UPDATE ON ORACLE form but we still support, and will continue to support, the regular SELECT FOR UPDATE on TimesTen tables as this is a very important capability.
Regards,
Chris