On Thu, 01 Dec 2011 09:34:03 -0800, William Lee <wlee(a)wikia-inc.com> wrote:
I'm a developer at Wikia. We have a use case for
searching through a
file's
metadata. This task is challenging now, because the field
Image.img_metadata is a blob.
We propose expanding the metadata field into a new table. We propose the
name image_metadata. It will have three columns: img_name, attribute
(varchar) and value (varchar). It can be joined with Image on img_name.
On the application side, LocalFile's load* and decodeRow methods will
have
to be changed to support the new table.
One issue to consider is the file archive. Should we replicate the
metadata
table for file archive? Or serialize the data and store it in a new table
(something like fa_metadata)?
Please let us know if you see any issues with this plan. We hope that
this
will be useful to the MediaWiki project, and a candidate to merge back.
Thanks,
Will
imgmeta_name, imgmeta_attribute, imgmeta_value would fit our standards for
column naming better.
Why isn't our image table primary key an integer anyways?
We already have columns for the metadata blobs. And I'm assuming that you
don't need to query old image versions for metadata. If that's the case
then how about leaving the oi_metadata column in use?
--
~Daniel Friesen (Dantman, Nadir-Seen-Fire) [
http://daniel.friesen.name]