The 1.15 release of MediaWiki introduced some hardcoded bitwise
operators to the core SQL. They were added to operate on the
log_deleted column in the logging table by, I think, aaron. This is
because the log_deleted column now has multiple states.
Unfortunately, bitwise operators have different syntax in different databases.
MySQL, PostgreSQL:
log_deleted & 1
DB2, Oracle:
BITAND(log_deleted, 1)
I think there are three options to make it compatible:
1. Refactor the database to not use an integer as a bit field. Just
use four different boolean columns, which works well cross-database.
2. Add a function to the Database API for each bit operator.
$sql = $database->bitand('log_deleted', 1);
3. Add a function to the Database API to handle all the operators.
$sql = $database->op('&', 'log_deleted', 1);
or
$sql = $database->op(Database::BITAND, 'log_deleted', 1);
My preference is for option 1 or 3. Thoughts?
Regards,
Leons Petrazickis
http://lpetr.org/blog/