Packages

  • package root

    Documentation/API for the Molecule library - a meta DSL for the Datomic database.

    scalamolecule.org | Github | Forum

    Definition Classes
    root
  • package molecule

    Molecule library - a Scala meta-DSL for the Datomic database.

    Molecule library - a Scala meta-DSL for the Datomic database.

    Definition Classes
    root
  • package core
    Definition Classes
    molecule
  • package expression

    Attribute expressions and operations.

    Attribute expressions and operations.

    Refine attribute matches with various attribute expressions:

    Person.age(42)                           // equality
Person.name.contains("John")             // fulltext search
Person.age.!=(42)                        // negation (or `not`)
Person.age.<(42)                         // comparison (< > <= >=)
Person.name("John" or "Jonas")           // OR-logic
Person.age()                             // apply empty value to retract value(s) in updates
Person.hobbies.assert("golf")               // add value(s) to card-many attributes
Person.hobbies.retract("golf")            // retract value(s) of card-many attributes
Person.hobbies.replace("golf", "diving") // replace value(s) of card-many attributes
Person.tags.k("en")                      // match values of map attributes by key
Person.age(Nil)                          // match non-asserted datoms (null)
Person.name(?)                           // initiate input molecules awaiting input at runtime
Person.name(unify)                       // Unify attributes in self-joins

    Apply aggregate keywords to aggregate attribute value(s):

    // Aggregates on any attribute type
Person.age(count).get.head         === 3   // count of asserted `age` attribute values
Person.age(countDistinct).get.head === 3   // count of asserted distinct `age` attribute values
Person.age(max).get.head           === 38  // maximum `age` value (using `compare`)
Person.age(min).get.head           === 5   // maximum `age` value (using `compare`)
Person.age(rand).get.head          === 25  // single random `age` value
Person.age(sample).get.head        === 27  // single sample `age` value (when single value, same as random)

// Aggregates on any attribute type, returning multiple values
Person.age(distinct).get.head  === Vector(5, 7, 38)  // distinct `age` values
Person.age(max(2)).get.head    === Vector(38, 7)     // 2 maximum `age` values
Person.age(min(2)).get.head    === Vector(5, 7)      // 2 minimum `age` values
Person.age(rand(2)).get.head   === Stream(5, ?)      // 2 random `age` values (values can re-occur)
Person.age(sample(2)).get.head === Vector(7, 38)     // 2 sample `age` values

// Aggregates on number attributes
Person.age(sum).get.head      === 50               // sum of all `age` numbers
Person.age(avg).get.head      === 16.66666667      // average of all `age` numbers
Person.age(median).get.head   === 7                // median of all `age` numbers
Person.age(stddev).get.head   === 15.107025591499  // standard deviation of all `age` numbers
Person.age(variance).get.head === 228.2222222222   // variance of all `age` numbers
    Definition Classes
    core
  • package aggregates
    Definition Classes
    expression
  • object aggr_21
    Definition Classes
    aggregates
  • Aggr_21_L0
  • Aggr_21_L1
  • Aggr_21_L2
  • Aggr_21_L3
  • Aggr_21_L4
  • Aggr_21_L5
  • Aggr_21_L6
  • Aggr_21_L7

trait Aggr_21_L1[o0[_], p0, o1[_], p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, Ns[_[_], _, _[_], _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _, _]] extends AnyRef

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  4. def apply(v: api.Keywords.stddev): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, Double]
  5. def apply(v: api.Keywords.variance): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, Double]
  6. def apply(v: api.Keywords.avg): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, Double]
  7. def apply(v: api.Keywords.countDistinct): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, Int]
  8. def apply(v: api.Keywords.count): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, Int]
  9. def apply(v: api.Keywords.samples): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, List[U]]
  10. def apply(v: api.Keywords.rands): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, List[U]]
  11. def apply(v: api.Keywords.distinct): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, List[U]]
  12. def apply(v: api.Keywords.maxs): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, List[U]]
  13. def apply(v: api.Keywords.mins): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, List[U]]
  14. def apply(v: api.Keywords.median): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U]
  15. def apply(v: api.Keywords.sum): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U]
  16. def apply(v: api.Keywords.sample): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U]
  17. def apply(v: api.Keywords.rand): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U]
  18. def apply(v: api.Keywords.max): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U]
  19. def apply(v: api.Keywords.min): Ns[o0, p0, o1, p1, A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U]
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