From: | "Jenny -" <nat_lazy(at)hotmail(dot)com> |
---|---|
To: | pgsql-hackers(at)postgresql(dot)org |
Subject: | LOCK.tag(figuring out granularity of lock) |
Date: | 2003-08-19 16:17:28 |
Message-ID: | BAY1-F84LEUUiYzr7Oq0000ffb6@hotmail.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
following is taken from postgresql-7.3.2/src/backend/storage/lmgr/readme:
"If we are setting a table level lock
both the blockId and tupleId (in an item pointer this is called
the position) are set to invalid, if it is a page level lock the
blockId is valid, while the tupleId is still invalid. Finally if
this is a tuple level lock (we currently never do this) then both
the blockId and tupleId are set to valid specifications. "
how do we check whether blockId and tupleId of LOCK.tag are valid or
invalid?
is blockId same as tag.objId.blkno? what field in LOCK.tag is tupleId?
thanks
jenny
_________________________________________________________________
<b>Get MSN 8</b> and help protect your children with advanced parental
controls. http://join.msn.com/?page=features/parental
From | Date | Subject | |
---|---|---|---|
Next Message | Vivek Khera | 2003-08-19 16:17:54 | Re: Buglist |
Previous Message | Vivek Khera | 2003-08-19 16:13:33 | Re: Buglist |