Possible workaround for CORE-1239, Left outer - inner join
----------------------------------------------------------
Key: DNET-309
URL: http://tracker.firebirdsql.org/browse/DNET-309
Project: .NET Data provider
Issue Type: Improvement
Components: ADO.NET Provider
Affects Versions: 2.5.2
Environment: All
Reporter: Alexander Muylaert
Assignee: Jiri Cincura
The entity framework often generates statements that go like
from table a
left outer join table b on a.bid = b.id
inner join table c on a.cid = c.id
If this happens, all hell brakes loose in the core and due to the issue
(core-1239), the engine will perform a natural scan on table A.
If table A is big, the impact is immens.
If possible, try to sort the joins on sql generation level. That way the EF
generates the statement as
from table a
inner join table c on a.cid = c.id
left outer join table b on a.bid = b.id
Thanks Alexander
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://tracker.firebirdsql.org/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
------------------------------------------------------------------------------
Download Intel® Parallel Studio Eval
Try the new software tools for yourself. Speed compiling, find bugs
proactively, and fine-tune applications for parallel performance.
See why Intel Parallel Studio got high marks during beta.
http://p.sf.net/sfu/intel-sw-dev
_______________________________________________
Firebird-net-provider mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/firebird-net-provider
