This should have been done long ago. Now it is being done.
This also changes ar_text_id to NOT NULL, since it should never be null
anymore, and DEFAULT 0 in preparation for MCR stopping writing it.
Bug: T33223
Change-Id: I18f1c740b7537c7dc3cfeba9b241d0a9f31caa34
This begins the process of merging image_comment_temp into the image
table by adding the needed column. Iab5f5215 will adjust the code
to use it and to add the necessary migration script.
Note this patch puts the new schema change in the 1.30 section rather
than the 1.31 section. This allows Iab5f5215 to have migrateComments.php
migrate the comments directly to the new field instead of having to
populate and then depopulate the temporary table.
Bug: T188132
Change-Id: I2485c5a758bf03bb2b4991eea920abd9d0d30bda
Storing the user name or IP in every row in large tables like revision
and logging takes up space and makes operations on these tables slower.
This patch begins the process of moving those into one "actor" table
which other tables can reference with a single integer field.
A subsequent patch will remove the old columns.
Bug: T167246
Depends-On: I9293fd6e0f958d87e52965de925046f1bb8f8a50
Change-Id: I8d825eb02c69cc66d90bd41325133fd3f99f0226