(difference s1)
(difference s1 s2)
(difference s1 s2 & sets)
Return a set that is the first set without elements of the remaining sets
(index xrel ks)
Returns a map of the distinct values of ks in the xrel mapped to a set of the maps in xrel with the corresponding values of ks.
(intersection s1)
(intersection s1 s2)
(intersection s1 s2 & sets)
Return a set that is the intersection of the input sets
(join xrel yrel)
(join xrel yrel km)
When passed 2 rels, returns the rel corresponding to the natural join. When passed an additional keymap, joins on the corresponding keys.
(project xrel ks)
Returns a rel of the elements of xrel with only the keys in ks
(rename xrel kmap)
Returns a rel of the maps in xrel with the keys in kmap renamed to the vals in kmap
(rename-keys map kmap)
Returns the map with the keys in kmap renamed to the vals in kmap
(select pred xset)
Returns a set of the elements for which pred is true
(union)
(union s1)
(union s1 s2)
(union s1 s2 & sets)
Return a set that is the union of the input sets