ALTER TABLE /*_*/pagelinks
ADD COLUMN pl_from_namespace int NOT NULL default 0;
-CREATE INDEX /*i*/pl_backlinks_namespace ON /*_*/pagelinks (pl_namespace,pl_title,pl_from_namespace,pl_from);
+CREATE INDEX /*i*/pl_backlinks_namespace ON /*_*/pagelinks (pl_from_namespace,pl_namespace,pl_title,pl_from);