[svn.haxx.se] · SVN Dev · SVN Users · SVN Org · TSVN Dev · TSVN Users · Subclipse Dev · Subclipse Users · this month's index

Re: svn commit: r986865 - /subversion/trunk/notes/wc-ng/node-data

From: Philip Martin <philip.martin_at_wandisco.com>
Date: Thu, 19 Aug 2010 11:38:45 +0100

Greg Stein <gstein_at_gmail.com> writes:

> But that said, there is an argument for combining all three conceptual
> tables into one. Is that was you guys were suggesting?

Yes. The tables are so similar. For example, base_node's
repos_id/repos_relpath/revnum and the working_node's
copyfrom_id/copyfrom_relpath/copyfrom_revnum and both a sort of
"repos-node-rev". For op_depth 0 the repos-node-rev is always set,
there is pristine content and it's the same node in the repository and
wc. For other op_depth the repos-node-rev is optional, copies have
it, adds don't; but when it exists it means much the same: the node
has pristine content. op_depth tells us whether the repos-node-rev is
a copy or a base and that's exactly what op_depth is for.

Now op_depth 0 can be split out into a separate base_node table, our
current model, but during our meeting we were wondering if that is
necessary or useful.

We do have to have all fields at all op_depth, and some are not always
valid. dav_cache only applies to op_depth 0, translated_size only
applies the the greatest op_depth for any local_relpath, etc.; but
most of the fields are common. Even dav_cache might apply to higher
levels, perhaps it could be useful for the copyfrom?

-- 
Philip
Received on 2010-08-19 12:39:46 CEST

This is an archived mail posted to the Subversion Dev mailing list.