+ [ 'dropTable', 'valid_tag' ],
+ [ 'dropTable', 'tag_summary' ],
+ [ 'dropPgField', 'archive', 'ar_comment' ],
+ [ 'dropDefault', 'archive', 'ar_comment_id' ],
+ [ 'dropPgField', 'ipblocks', 'ipb_reason' ],
+ [ 'dropDefault', 'ipblocks', 'ipb_reason_id' ],
+ [ 'dropPgField', 'image', 'img_description' ],
+ [ 'dropDefault', 'image', 'img_description_id' ],
+ [ 'dropPgField', 'oldimage', 'oi_description' ],
+ [ 'dropDefault', 'oldimage', 'oi_description_id' ],
+ [ 'dropPgField', 'filearchive', 'fa_deleted_reason' ],
+ [ 'dropDefault', 'filearchive', 'fa_deleted_reason_id' ],
+ [ 'dropPgField', 'filearchive', 'fa_description' ],
+ [ 'dropDefault', 'filearchive', 'fa_description_id' ],
+ [ 'dropPgField', 'recentchanges', 'rc_comment' ],
+ [ 'dropDefault', 'recentchanges', 'rc_comment_id' ],
+ [ 'dropPgField', 'logging', 'log_comment' ],
+ [ 'dropDefault', 'logging', 'log_comment_id' ],
+ [ 'dropPgField', 'protected_titles', 'pt_reason' ],
+ [ 'dropDefault', 'protected_titles', 'pt_reason_id' ],