...: A data.frame or a named set of Arrays or vectors. If given a mixture of data.frames and named vectors, the inputs will be autospliced together (see examples). Alternatively, you can provide a single Arrow IPC InputStream, Message, Buffer, or R raw object containing a Buffer.
schema: a Schema , or NULL (the default) to infer the schema from the data in .... When providing an Arrow IPC buffer, schema is required.