-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Everybody,
P.G.O. wont show it anymore, so here is my blog article describing the feature a little bit: http://pvanhoof.be/blog/index.php/2014/09/30/nrlmaxcardinality-one-to-many-ontology-changes :-) Good luck with the release that will contain the now supported ontology change! Kind regards, Philip On 24/09/2014 22:32, Philip Van Hoof wrote: > Hi everyone, > > As many might have noticed in the changelog of 1.2.1 release we > decided to revert the nrl:maxCardinality change made on 08-28. > > That's because this ontology change force a reindex and removal of > your existing metadata. That's data loss for certain users, so not > acceptable for the majority of distributors distributing Tracker. > > A week or so ago I started with adding support for this kind of > ontology changes. > > Of course can't we ever in a reliable way support > nrl:maxCardinality change from multiple to one: we'd lose type > information if we'd only support it for CSV-like strings and for > any other type we can't store the multiple old values in a single > value solution. I don't aim to ever support this. I do aim to > support the one to multiple use-case. > > People interested in this can go look here: > > https://git.gnome.org/browse/tracker/log/?h=maxcardinality-change-support > > Right now it will change the ontology's introspection and it'll > allow free passage of the change without aborts or critical > warnings. > > What doesn't yet work is in the catacombes of cruelty, angst and > untold stories of brain torture, create_decomposed_metadata_tables, > to detect that this particular change is taking place this time. > And then do the rename of the table, create (without the columns of > the old single value), ensure the multi-value table is already > created and then finally copy the renamed table's single values to > the multi-value table to end with dropping the renamed table. > > The code is there but it doesn't work. > > This I will probably debug until it works later this week. I > silently hoping that somebody will beat me to it. I fear I will > have to do this miserable create_decomposed_metadata_tables stuff > one more time. > > Kind regards, > > Philip _______________________________________________ tracker-list > mailing list tracker-list@gnome.org > https://mail.gnome.org/mailman/listinfo/tracker-list > -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.20 (MingW32) iQEcBAEBAgAGBQJUKfYeAAoJEEP2NSGEz4aDYwgH/RRFefs+7a0ypOaljKfXCcup ZwtutK64flyU6Los8v7K/2o+s8ucX6u/1qGC91i48CPMizTVY+rjO0FjcLXLKNYN D56pJ6wLBXONG3fWqwY+WqIipEaNL8bkz0SUryCqxIEnN8obuP2yyMyE7A7YIO7O rV9QrtB2dbcxSvRQWdXqtgDfRZLZxNrI+UrnGMmwjAJdyEsg9bDp0sHQ0iy6A9pI adznu0qkPX9EokfFIM2nXi/6Zo19ArVKHg78xCPZDWGoI0WblOnivdZqNwm93Fxq uwvCcRuK6trfTlldc7lB8lIXqKZ4mCWzQUdr6tAPDG7w11uPa+o5K7Wb+Gbeq4E= =7zKn -----END PGP SIGNATURE----- _______________________________________________ tracker-list mailing list tracker-list@gnome.org https://mail.gnome.org/mailman/listinfo/tracker-list
