final AkibanInformationSchema origAIS = schemaManager.getAis(session);
final AkibanInformationSchema newAIS = schemaManager.getOnlineAIS(session);
final Schema origSchema = SchemaCache.globalSchema(origAIS);
final StoreAdapter origAdapter = store.createAdapter(session, origSchema);
final QueryContext origContext = new DelegatingContext(origAdapter, context);
final QueryBindings origBindings = origContext.createBindings();
final TransformCache transformCache = getTransformCache(session, null);
Set<Table> origRoots = findOldRoots(changeSets, origAIS, newAIS);
for(Table root : origRoots) {