Relational data attribute order — attrs

Generic function, fetching attribute order for relational objects.

Usage

attrs_order(x, ...)

attrs_order(x, ...) <- value

Arguments

x: an R object, such as a functional_dependency, relation_schema, relation, database_schema, or database object.
...: further arguments passed on to methods.
value: A character vector of the same length as attrs_order(x, ...).

Value

A character vector, giving attributes in the order in which they're prioritised for sorting within x.

Details

All classes in autodb contain an attrs_order attribute. It gives an easy way to find a list of all attributes/variables involved in an object, but its main purpose is to also assign those attributes a consistent order when printing or plotting the object.