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Make history, as-of and since composable #682

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jonasseglare opened this issue Jun 5, 2024 · 0 comments · May be fixed by #683
Open

Make history, as-of and since composable #682

jonasseglare opened this issue Jun 5, 2024 · 0 comments · May be fixed by #683
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enhancement New feature or request

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@jonasseglare
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jonasseglare commented Jun 5, 2024 •
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Describe the feature you would like to request

Currently the following three queries all produce an error:

(d/q '[:find ?a :in $ ?e :where [?e :age ?a]]
                        (-> @conn d/history d/history)
                        [:name "Alice"])

(d/q '[:find ?a :in $ ?e :where [?e :age ?a]]
                    (-> @conn
                        (d/as-of tx-id0)
                        d/history)
                    [:name "Alice"])

(d/q '[:find ?a :in $ ?e :where [?e :age ?a]]
                    (-> @conn
                        d/history
                        (d/as-of tx-id0))
                    [:name "Alice"])

The error is the following:

error: java.lang.IllegalArgumentException: No implementation of method: :-slice of protocol: #'datahike.index.interface/IIndex found for class: nil

Describe the solution you would like

I would like to make queries against database expressions such as (-> @conn d/history d/history), (-> @conn (d/as-of tx-id0) d/history) where we compose calls to d/history, d/as-of and d/since.

Describe alternatives you've considered

Datomic, where this is possible (at least to some extent).
@jonasseglare jonasseglare added the enhancement New feature or request label Jun 5, 2024
@jonasseglare jonasseglare linked a pull request Jun 5, 2024 that will close this issue
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Fix issue 682: Make history, as-of and since composable with each other jonasseglare/datahike
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@jonasseglare