Function is_ddl_reserved_table 

pub fn is_ddl_reserved_table(schema: &str, table: &str) -> bool

Returns true for tables whose definition is system-owned while their rows are user-written: created with a canonical schema on first write; user CREATE/ALTER/RENAME-into rejected; DML and DROP/TRUNCATE allowed (the next write recreates the table). Currently only the declared-edge table.