* since the table descriptor may be looked up as part of
* decoding tuples in SYSDEPENDS.
*/
dm.invalidateFor(sd, DependencyManager.DROP_SCHEMA, lcc);
dd.dropSchemaDescriptor(schemaName, tc);
/*
** If we have dropped the current default schema,
** then we will set the default to null. The
** LCC is free to set the new default schema to