1197764949
We'd like this to be part of the query syntax itself, but doing so requires extending DataScript's parser. Instead we generalize our `args` to `options`, and take `:limit` and `:order-by-vars`. The former must be an integer or nil, and the latter is an array of `[var direction]` pairs. This commit includes descriptive error messages and tests for success and failure.
569 lines
22 KiB
Clojure
569 lines
22 KiB
Clojure
(ns datomish.test.query
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#?(:cljs
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(:require-macros
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[datomish.pair-chan :refer [go-pair <?]]
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[datomish.node-tempfile-macros :refer [with-tempfile]]
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[cljs.core.async.macros :as a :refer [go]]))
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(:require
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[datomish.query.cc :as cc]
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[datomish.query.context :as context]
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[datomish.query.source :as source]
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[datomish.query.transforms :as transforms]
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[datomish.query :as query]
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[datomish.db :as db]
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[datomish.schema :as schema]
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[datomish.transact :as transact]
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[datomish.api :as d]
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#?@(:clj
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[[datomish.pair-chan :refer [go-pair <?]]
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[datomish.jdbc-sqlite]
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[datomish.test-macros :refer [deftest-db]]
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[honeysql.core :as sql :refer [param]]
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[tempfile.core :refer [tempfile with-tempfile]]
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[clojure.test :as t :refer [is are deftest testing]]])
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#?@(:cljs
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[[datomish.promise-sqlite]
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[datomish.test-macros :refer-macros [deftest-db]]
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[honeysql.core :as sql :refer-macros [param]]
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[datomish.node-tempfile :refer [tempfile]]
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[cljs.test :as t :refer-macros [is are deftest testing]]]))
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#?(:clj
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(:import [clojure.lang ExceptionInfo])))
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(defn- fgensym [s c]
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(symbol (str s c)))
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(defn make-predictable-gensym []
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(let [counter (atom 0)]
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(fn
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([]
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(fgensym "G__" (dec (swap! counter inc))))
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([s]
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(fgensym s (dec (swap! counter inc)))))))
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(def simple-schema
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[{:db/id (d/id-literal :db.part/user)
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:db.install/_attribute :db.part/db
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:db/ident :db/txInstant
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:db/valueType :db.type/long
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:db/cardinality :db.cardinality/one}
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{:db/id (d/id-literal :db.part/user)
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:db.install/_attribute :db.part/db
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:db/ident :foo/bar
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:db/valueType :db.type/string
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:db/cardinality :db.cardinality/many}
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{:db/id (d/id-literal :db.part/user)
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:db.install/_attribute :db.part/db
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:db/ident :foo/int
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:db/valueType :db.type/long
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:db/cardinality :db.cardinality/one}
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{:db/id (d/id-literal :db.part/user)
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:db.install/_attribute :db.part/db
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:db/ident :foo/str
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:db/valueType :db.type/string
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:db/cardinality :db.cardinality/many}])
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(def page-schema
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[{:db/id (d/id-literal :db.part/user)
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:db.install/_attribute :db.part/db
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:db/ident :page/loves
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:db/valueType :db.type/ref
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:db/cardinality :db.cardinality/many}
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{:db/id (d/id-literal :db.part/user)
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:db.install/_attribute :db.part/db
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:db/ident :page/likes
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:db/valueType :db.type/ref
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:db/cardinality :db.cardinality/many}
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{:db/id (d/id-literal :db.part/user)
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:db.install/_attribute :db.part/db
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:db/ident :page/url
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:db/valueType :db.type/string
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:db/unique :db.unique/identity
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:db/cardinality :db.cardinality/one}
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{:db/id (d/id-literal :db.part/user)
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:db.install/_attribute :db.part/db
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:db/ident :page/title
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:db/valueType :db.type/string
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:db/cardinality :db.cardinality/one}
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{:db/id (d/id-literal :db.part/user)
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:db.install/_attribute :db.part/db
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:db/ident :page/starred
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:db/valueType :db.type/boolean
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:db/cardinality :db.cardinality/one}])
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(def aggregate-schema
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[{:db/id (d/id-literal :db.part/user)
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:db.install/_attribute :db.part/db
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:db/ident :page/url
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:db/valueType :db.type/string
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:db/unique :db.unique/identity
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:db/cardinality :db.cardinality/one}
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{:db/id (d/id-literal :db.part/user)
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:db.install/_attribute :db.part/db
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:db/ident :foo/points
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:db/valueType :db.type/long
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:db/cardinality :db.cardinality/many}
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{:db/id (d/id-literal :db.part/user)
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:db.install/_attribute :db.part/db
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:db/ident :foo/visitedAt
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:db/valueType :db.type/instant
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:db/cardinality :db.cardinality/many}])
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(def schema-with-page
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(concat
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simple-schema
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page-schema))
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(defn mock-source [db]
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(assoc (datomish.db/datoms-source db)
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:table-alias (comp (make-predictable-gensym) name)))
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(defn conn->context [conn]
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(context/make-context (mock-source (d/db conn))))
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(defn- expand [find conn]
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(let [context (conn->context conn)
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parsed (query/parse find)]
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(query/find->sql-clause context parsed)))
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(defn- populate [find conn]
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(let [context (conn->context conn)
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parsed (query/parse find)]
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(query/find-into-context context parsed)))
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(defn <initialize-with-schema [conn schema]
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(go-pair
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(let [tx (<? (d/<transact! conn schema))]
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(let [idents (map :db/ident schema)
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db (d/db conn)]
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(into {}
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(map (fn [ident]
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[ident (d/entid db ident)])
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idents))))))
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(deftest-db test-type-extraction conn
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;; We expect to be able to look up the default types.
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(is (integer? (d/entid (d/db conn) :db.type/ref)))
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(is (integer? (d/entid (d/db conn) :db.type/long)))
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;; Add our own schema.
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(<? (<initialize-with-schema conn simple-schema))
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(testing "Variable entity."
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(is (= (->
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(populate '[:find ?e ?v :in $ :where [?e :foo/int ?v]] conn)
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:cc :known-types)
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{'?v :db.type/long
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'?e :db.type/ref})))
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(testing "Numeric entid."
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(is (= (->
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(populate '[:find ?v :in $ :where [6 :foo/int ?v]] conn)
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:cc :known-types)
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{'?v :db.type/long})))
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(testing "Keyword entity."
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(is (= (->
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(populate '[:find ?v :in $ :where [:my/thing :foo/int ?v]] conn)
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:cc :known-types)
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{'?v :db.type/long}))))
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(deftest-db test-value-constant-constraint-descends-into-not-and-or conn
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(let [attrs (<? (<initialize-with-schema conn simple-schema))]
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(testing "Elision of types inside a join."
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(is (= {:select '([:datoms0.e :e]
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[:datoms0.v :v]),
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:modifiers [:distinct],
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:from [[:datoms 'datoms0]],
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:where (list :and
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[:= :datoms0.a (:foo/int attrs)]
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[:not
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[:exists
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{:select [1],
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:from [[:all_datoms 'all_datoms1]],
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:where (list :and
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[:= :all_datoms1.e 999]
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[:= :datoms0.v :all_datoms1.v])}]])}
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(expand
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'[:find ?e ?v :in $ :where
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[?e :foo/int ?v]
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(not [999 ?a ?v])]
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conn))))
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(testing "Type collisions inside :not."
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(is (thrown-with-msg?
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ExceptionInfo #"v already has type :db.type.long"
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(expand
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'[:find ?e ?v :in $ :where
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[?e :foo/int ?v]
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(not [999 :foo/str ?v])]
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conn))))
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(testing "Type collisions inside :or"
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(is (thrown-with-msg?
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ExceptionInfo #"v already has type :db.type.long"
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(expand
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'[:find ?e ?v :in $ :where
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[?e :foo/int ?v]
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(or
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[999 :foo/str ?v]
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[666 :foo/int ?v])]
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conn))))))
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(deftest-db test-type-collision conn
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(<? (<initialize-with-schema conn simple-schema))
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(let [find '[:find ?e ?v :in $
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:where
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[?e :foo/int ?v]
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[?x :foo/str ?v]]]
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(is (thrown-with-msg?
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ExceptionInfo #"v already has type :db.type.long"
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(populate find conn)))))
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(deftest-db test-value-constant-constraint conn
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(<? (<initialize-with-schema conn simple-schema))
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(is (= {:select '([:all_datoms0.e :foo]),
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:modifiers [:distinct],
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:from '[[:all_datoms all_datoms0]],
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:where (list :and
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(list :or
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[:= :all_datoms0.value_type_tag 0]
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;; In CLJS, this can also be an `instant`.
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#?@(:cljs [[:= :all_datoms0.value_type_tag 4]])
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[:= :all_datoms0.value_type_tag 5])
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[:= :all_datoms0.v 99])}
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(expand
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'[:find ?foo :in $ :where
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[?foo _ 99]]
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conn))))
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(deftest-db test-value-constant-constraint-elided-using-schema conn
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(let [attrs (<? (<initialize-with-schema conn schema-with-page))]
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(testing "Our attributes were interned."
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(is (integer? (d/entid (d/db conn) :foo/str)))
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(is (integer? (d/entid (d/db conn) :page/starred))))
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(testing "There's no need to produce value_type_tag constraints when the attribute is specified."
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(is
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(= {:select '([:datoms1.v :timestampMicros] [:datoms0.e :page]),
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:modifiers [:distinct],
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:from [[:datoms 'datoms0]
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[:datoms 'datoms1]],
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:where (list :and
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;; We don't need a type check on the range of page/starred...
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[:= :datoms0.a (:page/starred attrs)]
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[:= :datoms0.v 1]
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[:= :datoms1.a (:db/txInstant attrs)]
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[:not
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[:exists
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{:select [1],
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:from [[:datoms 'datoms2]],
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:where (list :and
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[:= :datoms2.a (:foo/bar attrs)]
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[:= :datoms0.e :datoms2.e])}]]
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[:= :datoms0.tx :datoms1.e])}
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(expand
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'[:find ?timestampMicros ?page :in $ ?latest :where
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[?page :page/starred true ?t]
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[?t :db/txInstant ?timestampMicros]
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(not [?page :foo/bar _])]
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conn))))))
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(deftest-db test-basic-join conn
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;; Note that we use a schema without :page/starred, so we
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;; don't know what type it is.
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(let [attrs (<? (<initialize-with-schema conn simple-schema))]
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(is (= {:select '([:datoms1.v :timestampMicros] [:datoms0.e :page]),
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:modifiers [:distinct],
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:from '([:datoms datoms0]
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[:datoms datoms1]),
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:where (list
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:and
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;; Note that :page/starred is literal, because
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;; it's not present in the interned schema.
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[:= :datoms0.a :page/starred]
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[:= :datoms0.value_type_tag 1] ; boolean
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[:= :datoms0.v 1]
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[:= :datoms1.a (:db/txInstant attrs)]
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[:not
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(list :and (list :> :datoms0.tx (sql/param :latest)))]
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[:= :datoms0.tx :datoms1.e])}
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(expand
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'[:find ?timestampMicros ?page :in $ ?latest :where
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[?page :page/starred true ?t]
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[?t :db/txInstant ?timestampMicros]
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(not [(> ?t ?latest)])]
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conn)))))
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(deftest-db test-pattern-not-join conn
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(let [attrs (<? (<initialize-with-schema conn simple-schema))]
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(is (= {:select '([:datoms1.v :timestampMicros] [:datoms0.e :page]),
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:modifiers [:distinct],
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:from [[:datoms 'datoms0]
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[:datoms 'datoms1]],
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:where (list
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:and
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;; Note that :page/starred is literal, because
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;; it's not present in the interned schema.
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[:= :datoms0.a :page/starred]
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[:= :datoms0.value_type_tag 1] ; boolean
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[:= :datoms0.v 1]
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[:= :datoms1.a (:db/txInstant attrs)]
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[:not
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[:exists
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{:select [1],
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:from [[:datoms 'datoms2]],
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:where (list :and
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[:= :datoms2.a (:foo/bar attrs)]
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[:= :datoms0.e :datoms2.e])}]]
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[:= :datoms0.tx :datoms1.e])}
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(expand
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'[:find ?timestampMicros ?page :in $ ?latest :where
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[?page :page/starred true ?t]
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[?t :db/txInstant ?timestampMicros]
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(not [?page :foo/bar _])]
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conn)))))
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;; Note that clause ordering is not directly correlated to the output: cross-bindings end up
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;; at the front. The SQL engine will do its own analysis. See `clauses/expand-where-from-bindings`.
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(deftest-db test-not-clause-ordering-preserved conn
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(let [attrs (<? (<initialize-with-schema conn schema-with-page))]
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(is (= {:select '([:datoms1.v :timestampMicros] [:datoms0.e :page]),
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:modifiers [:distinct],
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:from '[[:datoms datoms0]
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[:datoms datoms1]],
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:where (list
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:and
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;; We don't need a value tag constraint -- we know the range of the attribute.
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[:= :datoms0.a (:page/starred attrs)]
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[:= :datoms0.v 1]
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[:not
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(list :and (list :> :datoms0.tx (sql/param :latest)))]
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[:= :datoms1.a (:db/txInstant attrs)]
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[:= :datoms0.tx :datoms1.e]
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)}
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(expand
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'[:find ?timestampMicros ?page :in $ ?latest :where
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[?page :page/starred true ?t]
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(not [(> ?t ?latest)])
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[?t :db/txInstant ?timestampMicros]]
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conn)))))
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(deftest-db test-pattern-not-join-ordering-preserved conn
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(let [attrs (<? (<initialize-with-schema conn schema-with-page))]
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(is (= {:select '([:datoms2.v :timestampMicros] [:datoms0.e :page]),
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:modifiers [:distinct],
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:from [[:datoms 'datoms0]
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[:datoms 'datoms2]],
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:where (list :and
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;; We don't need a value tag constraint -- we know the range of the attribute.
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[:= :datoms0.a (:page/starred attrs)]
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[:= :datoms0.v 1]
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[:not
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[:exists
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{:select [1],
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:from [[:datoms 'datoms1]],
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:where (list :and
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[:= :datoms1.a (:foo/bar attrs)]
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[:= :datoms0.e :datoms1.e])}]]
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[:= :datoms2.a (:db/txInstant attrs)]
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[:= :datoms0.tx :datoms2.e])}
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(expand
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'[:find ?timestampMicros ?page :in $ ?latest :where
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[?page :page/starred true ?t]
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(not [?page :foo/bar _])
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[?t :db/txInstant ?timestampMicros]]
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conn)))))
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(deftest-db test-single-or conn
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(let [attrs (<? (<initialize-with-schema conn schema-with-page))]
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(is (= {:select '([:datoms0.e :page]),
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:modifiers [:distinct],
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:from '([:datoms datoms0] [:datoms datoms1] [:datoms datoms2]),
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:where (list :and
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[:= :datoms0.a (:page/url attrs)]
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[:= :datoms0.v "http://example.com/"]
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[:= :datoms1.a (:page/title attrs)]
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[:= :datoms2.a (:page/loves attrs)]
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[:= :datoms0.e :datoms1.e]
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[:= :datoms0.e :datoms2.v])}
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(expand
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'[:find ?page :in $ ?latest :where
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[?page :page/url "http://example.com/"]
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[?page :page/title ?title]
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(or
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[?entity :page/loves ?page])]
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conn)))))
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(deftest-db test-simple-or conn
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(let [attrs (<? (<initialize-with-schema conn schema-with-page))]
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(is (= {:select '([:datoms0.e :page]),
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:modifiers [:distinct],
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:from '([:datoms datoms0] [:datoms datoms1] [:datoms datoms2]),
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:where (list :and
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[:= :datoms0.a (:page/url attrs)]
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[:= :datoms0.v "http://example.com/"]
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[:= :datoms1.a (:page/title attrs)]
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(list :or
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[:= :datoms2.a (:page/likes attrs)]
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[:= :datoms2.a (:page/loves attrs)])
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[:= :datoms0.e :datoms1.e]
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[:= :datoms0.e :datoms2.v])}
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(expand
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'[:find ?page :in $ ?latest :where
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[?page :page/url "http://example.com/"]
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[?page :page/title ?title]
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(or
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[?entity :page/likes ?page]
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[?entity :page/loves ?page])]
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conn)))))
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(defn tag-clauses [column input]
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(let [codes (cc/->tag-codes input)]
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(if (= 1 (count codes))
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[:= column (first codes)]
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(cons :or (map (fn [tag]
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[:= column tag])
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codes)))))
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(deftest-db test-url-tag conn
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(let [attrs (<? (<initialize-with-schema conn schema-with-page))]
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(is (= {:select '([:all_datoms0.e :page]
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[:datoms1.v :thing]),
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:modifiers [:distinct],
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:from '([:all_datoms all_datoms0]
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|
[:datoms datoms1]),
|
|
:where (list
|
|
:and
|
|
(tag-clauses :all_datoms0.value_type_tag "http://example.com/")
|
|
[:= :all_datoms0.v "http://example.com/"]
|
|
(list
|
|
:or
|
|
[:= :datoms1.a (:page/likes attrs)]
|
|
[:= :datoms1.a (:page/loves attrs)])
|
|
[:= :all_datoms0.e :datoms1.e])}
|
|
(expand
|
|
'[:find ?page ?thing :in $ ?latest :where
|
|
[?page _ "http://example.com/"]
|
|
(or
|
|
[?page :page/likes ?thing]
|
|
[?page :page/loves ?thing])]
|
|
conn)))))
|
|
|
|
(deftest-db test-tag-projection conn
|
|
(let [attrs (<? (<initialize-with-schema conn schema-with-page))]
|
|
(is (= {:select '([:all_datoms0.e :page]
|
|
[:all_datoms0.v :thing]
|
|
[:all_datoms0.value_type_tag :_thing_type_tag]),
|
|
:modifiers [:distinct],
|
|
:from '([:all_datoms all_datoms0])}
|
|
(expand
|
|
'[:find ?page ?thing :in $ :where
|
|
[?page _ ?thing]]
|
|
conn)))))
|
|
|
|
(deftest-db test-aggregates conn
|
|
(let [attrs (<? (<initialize-with-schema conn aggregate-schema))
|
|
context
|
|
(populate '[:find ?date (max ?v)
|
|
:with ?e
|
|
:in $ ?then
|
|
:where
|
|
[?e :foo/visitedAt ?date]
|
|
[(> ?date ?then)]
|
|
[?e :foo/points ?v]] conn)]
|
|
|
|
(is (= (:group-by-vars context)
|
|
['?date '?e]))
|
|
|
|
(is (= {:select '([:preag.date :date]
|
|
[:%max.preag.v :_max_v])
|
|
:modifiers [:distinct]
|
|
:group-by '(:date :e),
|
|
:with {:preag
|
|
{:select '([:datoms0.v :date]
|
|
[:datoms1.v :v]
|
|
[:datoms0.e :e]), ; Because we need to group on it.
|
|
:modifiers [:distinct],
|
|
:from '([:datoms datoms0] [:datoms datoms1]),
|
|
:where (list
|
|
:and
|
|
[:= :datoms0.a (:foo/visitedAt attrs)]
|
|
(list :> :datoms0.v (sql/param :then))
|
|
[:= :datoms1.a (:foo/points attrs)]
|
|
[:= :datoms0.e :datoms1.e])}}
|
|
:from [:preag]}
|
|
(query/context->sql-clause context)))))
|
|
|
|
(deftest-db test-get-else conn
|
|
(let [attrs (<? (<initialize-with-schema conn page-schema))]
|
|
(is (= {:select (list
|
|
[:datoms0.e :page]
|
|
[{:select [(sql/call
|
|
:coalesce
|
|
{:select [:v],
|
|
:from [:datoms],
|
|
:where [:and
|
|
[:= 'a 65540]
|
|
[:= 'e :datoms0.e]],
|
|
:limit 1}
|
|
"No title")],
|
|
:limit 1} :title]),
|
|
:modifiers [:distinct],
|
|
:from '([:datoms datoms0]),
|
|
:where (list :and [:= :datoms0.a 65539])}
|
|
(expand '[:find ?page ?title :in $
|
|
:where
|
|
[?page :page/url _]
|
|
[(get-else $ ?page :page/title "No title") ?title]]
|
|
conn)))))
|
|
|
|
(deftest-db test-limit-order conn
|
|
(let [attrs (<? (<initialize-with-schema conn aggregate-schema))
|
|
context
|
|
(populate '[:find ?date (max ?v)
|
|
:with ?e
|
|
:in $ ?then
|
|
:where
|
|
[?e :foo/visitedAt ?date]
|
|
[(> ?date ?then)]
|
|
[?e :foo/points ?v]] conn)]
|
|
(is
|
|
(thrown-with-msg?
|
|
ExceptionInfo #"Invalid limit \?x"
|
|
(query/options-into-context context '?x [[:date :asc]])))
|
|
(is
|
|
(thrown-with-msg?
|
|
ExceptionInfo #"Ordering expressions must be :asc or :desc"
|
|
(query/context->sql-clause
|
|
(query/options-into-context context 10 [[:date :upsidedown]]))))
|
|
(is
|
|
(thrown-with-msg?
|
|
ExceptionInfo #"Ordering vars \#\{:nonexistent\} not a subset"
|
|
(query/context->sql-clause
|
|
(query/options-into-context context 10 [[:nonexistent :desc]]))))
|
|
(is
|
|
(=
|
|
{:limit 10}
|
|
(select-keys
|
|
(query/context->sql-clause
|
|
(query/options-into-context context 10 nil))
|
|
[:order-by :limit]
|
|
)))
|
|
(is
|
|
(=
|
|
{:order-by [[:date :asc]]}
|
|
(select-keys
|
|
(query/context->sql-clause
|
|
(query/options-into-context context nil [[:date :asc]]))
|
|
[:order-by :limit]
|
|
)))
|
|
(is
|
|
(=
|
|
{:limit 10
|
|
:order-by [[:date :asc]]}
|
|
(select-keys
|
|
(query/context->sql-clause
|
|
(query/options-into-context context 10 [[:date :asc]]))
|
|
[:order-by :limit]
|
|
)))))
|