[Labs-l] Metainformation table now on replica servers.

[Marc A. Pelletier]

Hey all,

In what is most likely the most requested feature for labs replication
yet, I've added a table with automatically maintained meta information
about the replicated databases: meta_p.wiki (which is available on every
shard).

+------------------+--------------+------+-----+---------+-------+
| Field            | Type         | Null | Key | Default | Extra |
+------------------+--------------+------+-----+---------+-------+
| dbname           | varchar(32)  | NO   | PRI | NULL    |       |
| lang             | varchar(12)  | NO   |     | en      |       |
| name             | text         | YES  |     | NULL    |       |
| family           | text         | YES  |     | NULL    |       |
| url              | text         | YES  |     | NULL    |       |
| size             | decimal(1,0) | NO   |     | 1       |       |
| slice            | text         | NO   |     | NULL    |       |
| is_closed        | decimal(1,0) | NO   |     | 0       |       |
| has_echo         | decimal(1,0) | NO   |     | 0       |       |
| has_flaggedrevs  | decimal(1,0) | NO   |     | 0       |       |
| has_visualeditor | decimal(1,0) | NO   |     | 0       |       |
| has_wikidata     | decimal(1,0) | NO   |     | 0       |       |
+------------------+--------------+------+-----+---------+-------+

There is a lingering issue with the 'name' column which seems to
improperly encode the Wiki name when non-ascii characters are involved;
that will get fix once I manage to beat some sense into mysql.

Most columns are self-explanatory, and I can add a few more depending on
demand.  In the meantime, (dbname, slice) provides the much requested
mapping between databases and slices.

-- Marc