New subject: Breaking change: "wb_entity_per_page" table will not be updated and replicated on ToolLabs anymore

6 Oct 2017


      Just a reminder,
We are starting to phase out the table, it will stop getting updated from
end of the next week and will be dropped two or three weeks from now, the
wb_terms table now have term_full_entity_id instead which is not replicated
to labs yet [0] but it will very soon.
[0]: https://phabricator.wikimedia.org/T167114
Best
...
From: Magnus Manske magnusmanske@googlemail.com
Date: Thu, Jun 1, 2017 at 5:21 PM
Subject: Re: [Wikidata-tech] Breaking change: "wb_entity_per_page" table
will not be updated and replicated on ToolLabs anymore
To: Daniel Kinzler daniel.kinzler@wikimedia.de, Wikidata technical
discussion wikidata-tech@lists.wikimedia.org
The original code predated SPARQL, so I have to change it anyway. The
example I gave is small enough for SPARQL, but others will not be.
On Thu, Jun 1, 2017 at 4:11 PM Daniel Kinzler daniel.kinzler@wikimedia.de
wrote:
...
Am 01.06.2017 um 16:59 schrieb Magnus Manske:
...
As an example from my BEACON tool, I want all properties that have a
formatter
...
property, with English label. That SQL is now:
SELECT DISTINCT page_title,term_text FROM pagelinks,page,wb_terms WHERE
page_namespace=120 AND substr(page_title,2)=term_entity_id and
term_entity_type='property' and term_language='en' and
term_type='label' and
...
pl_from=page_id and pl_title='P1630' and pl_namespace=120 and
pl_from_namespace=120 ORDER BY term_text
Note the "substr". My first attempt was "page_title=concat('Q',term_en
tity_id)",
...
but that took forever.
If we indeed get a full entity ID=page title column for wb_terms, and
for wb_items_per_site etc., that would at least fix the on-the-fly
compute. I
...
shall thus wait with code updates until I get the full story, and not
just
...
piece-by-piece...
There is currently no plan to put the full ID into wb_items_per_site or
wb_property_info, because these tables are bound to a specific entity
type.
Whether we want to do this would be a whole new discussion.
For what you are doing there, it's  probably a lot easier to use the query
service. SPARQL:
SELECT DISTINCT ?property ?propertyLabel
WHERE {
    ?property a wikibase:Property .
    ?property wdt:P1630  ?format .
    SERVICE wikibase:label { bd:serviceParam wikibase:language "en" }
}
--
Daniel Kinzler
Principal Platform Engineer
Wikimedia Deutschland
Gesellschaft zur Förderung Freien Wissens e.V.

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Re: [Wikidata-tech] Breaking change: "wb_entity_per_page" table will not be updated and replicated on ToolLabs anymore