Table 8 An example of Cassandra (columnar model) schema mapping
Construct | Name | Unique | Share | Id | Types | Models | Children | regexp | Refs. |
|---|---|---|---|---|---|---|---|---|---|
Row | _ | F | (1,1) | F | Map | COL | {...} | \(\epsilon\) | \(\epsilon\) |
Column (simple) | Name | T/F/U | (0/1,0/1) | T/F/U | Simple | COL | \(\epsilon\) | \(\epsilon\) | \(\epsilon\) |
Column (homogeneous array) | Name | T/F/U | (1,1) | F/U | Array | COL | {...} | Trivial | \(\epsilon\) |
Tuple | Name | T/F/U | (1,1) | F/U | Tuple | COL | {...} | Automaton | \(\epsilon\) |
Column family (complex structure) | Name | T/F/U | (1,1) | F/U | Map | COL | {...} | Trivial | \(\epsilon\) |
List (= array; column) | Name | T/F/U | (1,1) | F/U | Array | COL | {...} | Automaton | \(\epsilon\) |
Column (map) | Name | T/F/U | (1,1) | F/U | Map | COL | {...} | \(\epsilon\) | \(\epsilon\) |
Column (set) | Name | T/F/U | (1,1) | F/U | Set | COL | {...} | \(\epsilon\) | \(\epsilon\) |
Element of an array | _ | T/F/U | (1,0/1) | F/U | AnyType | COL | \(\epsilon\) | \(\epsilon\)/trivial/ automaton | \(\epsilon\) |
Element of a tuple | _ | T/F/U | (1,1) | F/U | AnyType | COL | \(\epsilon\)/{...} | \(\epsilon\)/trivial/ automaton | \(\epsilon\) |
Element of a set | _ | T/F/U | (1,1) | F/U | AnyType | COL | \(\epsilon\)/{...} | \(\epsilon\)/trivial/ automaton | \(\epsilon\) |
Identifier (simple) | Name | T | (1,1) | T | Simple | COL | \(\epsilon\) | \(\epsilon\) | \(\epsilon\) |