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<pre>
brion
brion: rev_id=page_latest
brion: rev_page=page_id
</pre>
Line 67 ⟶ 68:
+------------+
</pre>
< mutante> ok,with newer pages i can use rev_id=page_latest and old_id=rev_text_id, but with older pages i have equal values in rev_id and rev_text_id and i get an empty set if i then try to select page_title from page where page_latest=
<brion> mutante: rev_page=page_id
< brion> page_latest points to the latest rev_id in the page for convenience
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Revision as of 23:24, 5 January 2006
Ok, enough of trying to find the right queries after the upgrade to 1.5 mediawiki.
Lets just log the sql queries from the server.
A page being requested
get page_id
SELECT page_id FROM `page` WHERE page_namespace = '0' AND page_title = 'Ogg' LIMIT 1;
get page_latest
SELECT page_id,page_namespace,page_title,page_restrictions,page_counter,page_is_redirect,page_is_new,page_random,page_touched,page_latest,page_len FROM `page` WHERE page_id = '17369' LIMIT 1;
after having page_latest (32808) ,which is = rev_id in revision we can:
get revision_text_id
SELECT rev_text_id from revision where rev_id=32808;
after having rev_text_id (32770), which is = old_id, we can finally:
get the actual content
SELECT old_text,old_flags FROM `text` WHERE old_id = '32770';
brion: old_id=rev_text_id brion: rev_id=page_latest brion: rev_page=page_id
Searching for content
To seach for content in pages and return page titles that match, we would have to revert the process:
get old_id of matching page
select old_id from text where old_text LIKE "%vollmilch%" limit 1;
+--------+ | old_id | +--------+ | 32778 | +--------+
get rev_id from old_id
select rev_id from revision where rev_text_id=32778;
+--------+ | rev_id | +--------+ | 32816 | +--------+
result / page_title
select page_title from page where page_latest=32816;
+------------+ | page_title | +------------+ | Sandbox | +------------+
< mutante> ok,with newer pages i can use rev_id=page_latest and old_id=rev_text_id, but with older pages i have equal values in rev_id and rev_text_id and i get an empty set if i then try to select page_title from page where page_latest=
<brion> mutante: rev_page=page_id
< brion> page_latest points to the latest rev_id in the page for convenience