We haven't supported MySQL 4 since MediaWiki 1.19.
Change-Id: Ice3e62d02ebe94a5a48981039dc455014a5d53f2
* than a more direct method, but this is not a highly performance-cri-
* tical code path and readable code is more important here.
*
- * Note: this query works nicely on MySQL 5, but the optimizer in MySQL
- * 4 might get confused. If so, consider rewriting as a UNION.
- *
* If the target namespace doesn't allow subpages, moving with subpages
* would mean that you couldn't move them back in one operation, which
* is bad.