Append data block.
add_dbfs_block.RdAppends a block of data to the stream specified by the input handle. If the
handle does not exist, this call will throw an exception with
RESOURCE_DOES_NOT_EXIST.
add_dbfs_block.RdAppends a block of data to the stream specified by the input handle. If the
handle does not exist, this call will throw an exception with
RESOURCE_DOES_NOT_EXIST.