Created
April 6, 2012 18:15
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Datomic schema query, constrained by attribute namespace
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| ;; Datomic sample code | |
| ;; schema query for attribute types in specified namespaces | |
| (q '[:find ?attr | |
| :in $ [?include-ns ...] ;; bind ?include-ns once for each item in collection | |
| :where | |
| [?e :db/valueType] ;; all schema types (must have a valueType) | |
| [?e :db/ident ?attr] ;; schema type name | |
| [(datomic.Util/namespace ?attr) ?ns] ;; namespace of name | |
| [(= ?ns ?include-ns)]] ;; must match one of the ?include-ns | |
| (db conn) | |
| ["db.install" "fressian"]) ;; collection for ?include-ns |
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This hangs when run against Datomic Cloud with Client API v0.8.53 because database functions are not supported on Cloud (only on-prem), but I expect to see an anomaly returned by the API. In CloudWatch you'll see a ClientSPIFault, java.lang.ClassNotFoundException: datomic.Util.namespace.