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Datomic (Ͱ͍ͨʔͬΈͬ͘) ึੵ (@fatrow)

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Datomicͱ͸ • σʔλϕʔε • Rich Hickey ࡞ • 2012೥3݄ʙ • ϓϩϓϥΠΤλϦ

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Կ͕ҧ͏ʁ • ࣄ࣮ͷσʔλϕʔε

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ैདྷͷ͸ʁ • ৔ॴࢦ޲ͷσʔλϕʔε

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• ࣄ࣮ͷσʔλϕʔε • ৔ॴࢦ޲ͷσʔλϕʔε

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৔ॴʁ • ৽৘ใ͸چ৘ใͷ৔ॴʹ্ॻ͖ • ঢ়ଶ

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৔ॴࢦ޲DB • σʔλ͸৔ॴʹඥ͍͍ͮͯΔ • ৔ॴ؅ཧ໾(DBαʔό)ʹ࢓ࣄΛҰ೚

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Կ͕໰୊ʁ

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ݹ͍৘ใ͸ফ͑Δ • ্ॻ͖ͨ͠Β΋͏໭Εͳ͍

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ཉ͍͠෺͸޲͜͏ଆ • ৔ॴ͸ڞ༗Ͱ͖ͳ͍ • ԟ෮ίετͷ৺഑ • αʔόʔͷෛՙͷ৺഑

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Ұ؏ੑͱεέʔϧ • ΩϟογϡɺϨϓϦέʔγϣϯͷಋೖ => ৽ͨͳ৔ॴ => શମͷ؅ཧऀෆࡏ

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໰୊ͷࠜݯ

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৔ॴࢦ޲ϓϩάϥϛϯά • Place-Oriented Programming (PLOP) ϛϡʔλϒϧΦϒδΣΫτ etc

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৔ॴࢦ޲ϓϩάϥϛϯά • Ϧιʔε͕رগͳ࣌୅ʹੜ·Εͨ • ΋͸΍ͦΜͳ੍ݶ͸ͳ͘ͳͬͨ • ৘ใ͸ຊདྷ৔ॴͱ͸ؔ܎ͳ͍

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Datomic • ࣄ࣮ͷσʔλϕʔε • ࣄ࣮͸มΘΒͳ͍ɺফ͑ͳ͍

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ྫ: Ҿӽ͠ • ଠ࿠ͷॅॴ: ਆಸ઒ݝ (Ҿӽ͠) • ଠ࿠ͷॅॴ: ઍ༿ݝ

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ྫ: Ҿӽ͠ • ଠ࿠ͷॅॴ: ਆಸ઒ݝ (Ҿӽ͠) • ଠ࿠ͷॅॴ: ઍ༿ݝ ଠ࿠ͷॅॴ͕ਆಸ઒ͩͬͨࣄ࣮͸มΘΒͳ͍

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௥هܕDB • ৽͍͠ࣄ࣮(৘ใ)͸৽͍͠৔ॴʹ • աڈͷࣄ࣮͕׬શʹอ؅ • όοΫΞοϓ͕ͱͯ΋؆୯

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ଞͷ௥هܕDB • CouchDBɺPosgreSQLɺRethinkDBͳͲ • ࣅ͍ͯΔ఺΋ଟ͍͕ҟͳΔ఺΋ଟ͍ • ҧ͍͸ଟذʹ౉ΔͷͰ͜͜Ͱ͸ରൺ͠ ͳ͍

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৔ॴ͔Βͷղ์ • ࣄ࣮͸޷͖ͳ͚ͩڞ༗Ͱ͖Δ • ΋͏ෳࡶͳ৔ॴͷ؅ཧ͸ඞཁͳ͍

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࢓ࣄͷ෼ղ • ৔ॴ؅ཧ໾͕എෛ͍ͬͯͨ࢓ࣄ • σΟεΫIOɺ ΫΤϦʔɺτϥϯβΫ γϣϯɺΠϯσοΫε • ̏ͭͷ໾ऀʹ࢓ࣄΛ෼୲

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ετϨʔδαʔϏε • ࣄ࣮อ؅ݿ • ୯७ͳग़͠ೖΕॲཧ • Ұఆ୯ҐͰ·ͱΊͯ

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ϐΞʔ(Peer) • ΫΤϦʔΤϯδϯ͕ΫϥΠΞϯτ(ΞϓϦ) ଆʹຒΊࠐ·Εͨ • ετϨʔδαʔϏε͔Β௚઀σʔλऔಘ

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τϥϯβΫλʔ • ࣄ࣮ͷ௥ՃΛ୲͏ • ௥Ճ͸શͯ௚ྻʹ • ୯Ұϊʔυ • Peer΁ͷ௨஌

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Կ͕خ͍͠ͷ͔ • ετϨʔδαʔϏε • ϐΞʔ • τϥϯβΫλʔ

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όοΫΤϯυ͕ࣗ༝ • In-Memory • Local Storage (H2) • Amazon DynamoDB ※ • PostgreSQL ※ • Riak ※ • Infinispan ※ ※ Pro Edition

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͜ΕԿ͔Ͱݟͨ

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͜ΕԿ͔Ͱݟͨ • Java • .NET • Javascript, ... Clojure

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ޮ཰తͳΫΤϦʔ • PeerͷϝϞϦͷڐ͢ݶΓΩϟογϡ ԟ෮ίετθϩʹ

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ΫΤϦʔ͸εέʔϥϒϧ • ࣗવʹ෼ࢄॲཧʹ • ଞʹ໎࿭Λ͔͚ͳ͍ ߴෛՙͳΫΤϦʔ΋ࣗ༝

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શ෦τϥϯβΫγϣϯ • ΞϓϦଆͷෳࡶੑ͕ݮΔ • աڈͷͲͷॠؒʹ΋໭ͬͯΫΤϦʔͰ ͖Δ

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ޮ཰తͳॻ͖ࠐΈ • ॻ͖ࠐΈ͸εέʔϧ͸͠ͳ͍ɻ͕ • τϥϯβΫλʔ͸ϩοΫɺΫΤϦʔɺ σΟεΫIOΛ͠ͳ͍෼͍ܰ

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͓͞Β͍ • όοΫΤϯυ͕ࣗ༝ • ޮ཰తͰεέʔϥϒϧͳΫΤϦʔ • શ͕ͯτϥϯβΫγϣϯ • Ϧʔυͱ੾Γ཭͞Εͨ ޮ཰తͳϥΠτ

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σʔλϞσϧ

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RDB User id name age 1 “taro” 14 2 “john” 36 3 “mike” 25

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Comment id body book 1 “good” 3 2 “bad” 2 3 “not bad” 2 Book id isbn title 1 123456 “abc” 2 789101 “foo” 3 987654 “hello” RDB User id name age 1 “taro” 14 2 “john” 36 3 “mike” 25

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υΩϡϝϯτܕ(Mongodb) User { "_id" : ObjectId("509f41b38626d09726e978ed"), "name" : "taro", "tel" : "123-4567-8901", "address": { "zip": 123-4567, "city": "tokyo" } }

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Comment { "_id" : ObjectId("509f41b38626d09726e978ed"), "name" : "taro", "tel" : "123-4567-8901", "address": { "zip": 123-4567, "city": "tokyo" } } Book { "_id" : ObjectId("509f41b38626d09726e978ed"), "name" : "taro", "tel" : "123-4567-8901", "address": { "zip": 123-4567, "city": "tokyo" } } υΩϡϝϯτܕ(Mongodb) User { "_id" : ObjectId("509f41b38626d09726e978ed"), "name" : "taro", "tel" : "123-4567-8901", "address": { "zip": 123-4567, "city": "tokyo" } }

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Datomic ࣮ମ Entity ଐੑ Attribute ஋ Value ࣌ؒ Time • ࣄ࣮ͷ࠷খ୯Ґ Datom • ྫ) ଠ࿠ͷॅॴ͸ਆಸ઒ݝɻڈ೥͸ɻ

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Datom Entity Attribute Value Time 7 :address “ਆಸ઒” T123

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Datom Entity Attribute Value Time 7 :address “ਆಸ઒” T123 ࣮ମͷࣝผࢠɻ࣮૷্͸Long஋͕ࣗಈͰৼΒΕΔ

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Datom Entity Attribute Value Time 7 :address “ਆಸ઒” T123 ࣮ମͷࣝผࢠɻ࣮૷্͸Long஋͕ࣗಈͰৼΒΕΔ keyword

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Datom Entity Attribute Value Time 7 :address “ਆಸ઒” T123 ࣮ମͷࣝผࢠɻ࣮૷্͸Long஋͕ࣗಈͰৼΒΕΔ keyword τϥϯβΫγϣϯ൪߸

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Datom Entity Attribute Value Time 7 :name “taro” T123 7 :address “ਆಸ઒” T124 2 :name “foo” T125

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Datom • ςʔϒϧ͸ͳ͍ Entity Attribute Value Time 7 :name “taro” T123 7 :address “ਆಸ઒” T124 2 :name “foo” T125

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Datom • ςʔϒϧ͸ͳ͍ • ଐੑ໊͕িಥ͢ΔΜ͡Όʁ Entity Attribute Value Time 7 :name “taro” T123 7 :address “ਆಸ઒” T124 2 :name “foo” T125

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Datom • ໊લۭؒͰিಥ͠ͳ͍ Entity Attribute Value Time 7 :user/name “taro” T123 7 :user/address “ਆಸ઒” T124 2 :book/name “foo” T125

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Datom • σʔλϕʔε: Datomͷू߹ɺϩά • DatomΛ଍͔͢Ҿ͔͘ (add, retract) • Ҿ͘͸ফڈͰ͸ͳ͍㲈ଧͪফ͠

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API ͸จࣈྻͰ͸ͳ͘σʔλ (d/transact connection [[:db/add 7 :user/address “ਆಸ઒”] [:db/add 7 :user/name “taro”] [:db/retract 8 :book/name “foo”]])

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API ͸จࣈྻͰ͸ͳ͘σʔλ (d/transact connection [[:db/add 7 :user/address “ਆಸ઒”] [:db/add 7 :user/name “taro”] [:db/retract 8 :book/name “foo”]]) DatomͷϕΫλ

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γϣʔτΧοτ (d/transact connection [{:db/id 7, :user/address “ਆಸ઒”, :user/name “taro”} [:db/retract 8 :book/name “foo”]])

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γϣʔτΧοτ (d/transact connection [{:db/id 7, :user/address “ਆಸ઒”, :user/name “taro”} [:db/retract 8 :book/name “foo”]]) :db/id͸Entityͷࣄ

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Schema͋Γ • ଐੑ͸࢖͏લʹఆٛ • ଐੑͷఆٛ΋ී௨ͷDatomͰɻ SQLͷalter tableΈ͍ͨʹಛผ͡Όͳ͍

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Schemaఆٛྫ {:db/id #db/id[:db.part/db] :db/ident :user/address :db/valueType :db.type/string :db/cardinality :db.cardinality/one :db/unique :db.unique/value :db/index true :db/doc "A user's address"}

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Schemaఆٛྫ {:db/id #db/id[:db.part/db] :db/ident :user/address :db/valueType :db.type/string :db/cardinality :db.cardinality/one :db/unique :db.unique/value :db/index true :db/doc "A user's address"} ଐੑ໊

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Schemaఆٛྫ {:db/id #db/id[:db.part/db] :db/ident :user/address :db/valueType :db.type/string :db/cardinality :db.cardinality/one :db/unique :db.unique/value :db/index true :db/doc "A user's address"} ଐੑ໊ ܕ

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Schemaఆٛྫ {:db/id #db/id[:db.part/db] :db/ident :user/address :db/valueType :db.type/string :db/cardinality :db.cardinality/one :db/unique :db.unique/value :db/index true :db/doc "A user's address"} ଐੑ໊ ܕ Ұ͔ଟ͔

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Schemaఆٛྫ {:db/id #db/id[:db.part/db] :db/ident :user/address :db/valueType :db.type/string :db/cardinality :db.cardinality/one :db/unique :db.unique/value :db/index true :db/doc "A user's address"} ଐੑ໊ ܕ Ұ͔ଟ͔ ϢχʔΫ ಛੑ

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Schemaఆٛྫ {:db/id #db/id[:db.part/db] :db/ident :user/address :db/valueType :db.type/string :db/cardinality :db.cardinality/one :db/unique :db.unique/value :db/index true :db/doc "A user's address"} ଐੑ໊ ܕ Ұ͔ଟ͔ ϢχʔΫ ಛੑ ΠϯσοΫε

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Schemaఆٛྫ {:db/id #db/id[:db.part/db] :db/ident :user/address :db/valueType :db.type/string :db/cardinality :db.cardinality/one :db/unique :db.unique/value :db/index true :db/doc "A user's address"} ଐੑ໊ ܕ Ұ͔ଟ͔ ϢχʔΫ ಛੑ ΠϯσοΫε આ໌

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ଞʹ΋ • ஋ͷςΩετݕࡧ :db/fulltext true • ݹ͍஋Λ࢒͞ͳ͍ࢦఆ :db/noHistory true

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Կ͕خ͍͠ͷ͔ • ଐੑͷ૊Έ߹Θ͕ͤࣗ༝ :book/title ͱ :item/id Λ࣋ͨͤͯ΋͍͍ => ௕ظతͳॊೈੑ • ͕࣌ؒϑΝʔετΫϥε ࣌ؒʹඥ෇͚ͨΫΤϦʔ͕Մೳʹ

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ΫΤϦʔ

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Datalog • PrologͷαϒηοτDatalog • એݴత • จࣈྻͰ͸ͳ͘σʔλͰ • ҉໧తͳδϣΠϯ

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ΫΤϦʔ [:find ?e :in $ :where [$ ?e :user/address “ਆಸ઒”]]

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ΫΤϦʔ [:find ?e :in $ :where [$ ?e :user/address “ਆಸ઒”]] SQLͷSELECTΈ͍ͨͳɻฦͯ͠ཉ͍͠෺

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ΫΤϦʔ [:find ?e :in $ :where [$ ?e :user/address “ਆಸ઒”]] SQLͷSELECTΈ͍ͨͳɻฦͯ͠ཉ͍͠෺ ֎͔Β༩͑Δೖྗ

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ΫΤϦʔ [:find ?e :in $ :where [$ ?e :user/address “ਆಸ઒”]] SQLͷSELECTΈ͍ͨͳɻฦͯ͠ཉ͍͠෺ ֎͔Β༩͑Δೖྗ SQLͷwhereΈ͍ͨͳɻߜΓࠐΈ

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ΫΤϦʔ [:find ?e :in $ :where [$ ?e :user/address “ਆಸ઒”]] SQLͷSELECTΈ͍ͨͳɻฦͯ͠ཉ͍͠෺ ֎͔Β༩͑Δೖྗ SQLͷwhereΈ͍ͨͳɻߜΓࠐΈ ม਺ɻ ಉ໊͡લͳΒࣗಈతʹରԠɻ $͸σʔλϕʔεΛද͢

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ΫΤϦʔ [:find ?e :in $ :where [$ ?e :user/address “ਆಸ઒”]] SQLͷSELECTΈ͍ͨͳɻฦͯ͠ཉ͍͠෺ ֎͔Β༩͑Δೖྗ SQLͷwhereΈ͍ͨͳɻߜΓࠐΈ ม਺ɻ ಉ໊͡લͳΒࣗಈతʹରԠɻ $͸σʔλϕʔεΛද͢ ఆ਺ɻݻఆ͞Εͨ஋

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ΫΤϦʔ [:find ?e :in $ :where [ ?e :user/address “ਆಸ઒”]] $͚ͩಛघͰ:where͔ΒলུͰ͖Δ

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ఆ਺ͰߜΓࠐΈ [:find ?e :in $ :where [?e :user/address “ਆಸ઒”] [?e :user/name “taro”]]

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ఆ਺ͰߜΓࠐΈ [:find ?e :in $ :where [?e :user/address “ਆಸ઒”] [?e :user/name “taro”]] ਆಸ઒͔ͭtaroͰߜΓࠐΈ

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ೖྗ஋ͰߜΓࠐΈ [:find ?e :in $ ?addr ?name :where [?e :user/address ?addr] [?e :user/name ?name]]

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ೖྗ஋ͰߜΓࠐΈ [:find ?e :in $ ?addr ?name :where [?e :user/address ?addr] [?e :user/name ?name]] ೖྗ஋͕όΠϯυ͞ΕΔ

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͜Ε͸ߜΓࠐΈ͡Όͳ͍ [:find ?e ?name :in $ :where [?e :user/address “ਆಸ઒”] [?e :user/name ?name]]

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͜Ε͸ߜΓࠐΈ͡Όͳ͍ [:find ?e ?name :in $ :where [?e :user/address “ਆಸ઒”] [?e :user/name ?name]] ਆಸ઒ͷਓશһͷ໊લ΋ฦ͢

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҉໧తͳδϣΠϯ [:find ?book-e :in $ :where [?e :user/address “ਆಸ઒”] [?book-e :book/author ?e]]

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҉໧తͳδϣΠϯ [:find ?book-e :in $ :where [?e :user/address “ਆಸ઒”] [?book-e :book/author ?e]] ਆಸ઒ʹஶऀ͕͍Δຊ

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ଓ͖ • ެࣜͷνϡʔτϦΞϧ͕ॆ࣮ • Ұ೔͔͔ΔΑ

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ࠓ͸ۤखͳ͜ͱ • ιʔτΛΞϓϦଆͰ΍Βͳ͍ͱ͍͚ͳ͍ • ΞϓϦʹΑͬͯ͸݁ߏக໋త

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ઃܭ఩ֶ(1) • Out of the Tar Pit ࿦จ: Ben Moseley, Peter Marks 2006

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ઃܭ఩ֶ(2) • The Value of Values (஋ͷՁ஋) Rich Hickey keynote • ʮ஋(σʔλ)͸࠷ߴͩʂ͋Ε΋͜Ε΋͍ ͍͜ͱͣ͘ΊɻPLOPɺ܅͸ͩΊͩʯ

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ઃܭ఩ֶ(2) • The Value of Values (஋ͷՁ஋) Rich Hickey keynote • ʮ஋(σʔλ)͸࠷ߴͩʂ͋Ε΋͜Ε΋͍ ͍͜ͱͣ͘ΊɻPLOPɺ܅͸ͩΊͩʯ ͱͯ΋໘ന͍Α

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·ͱΊ • ৔ॴࢦ޲͔Βͷ୤٫ • Πϛϡʔλϒϧͳ஋͕σβΠϯΛಋ͘

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ऴΘΓ Photo credit cover(universe) write_adam "IC443, the Jellyfish nebula" CC BY-NC 2.0 http://www.flickr.com/photos/astroporn/5234588981/ fact(lens)Raymond Larose "No Crop, No Edit" CC BY-NC-ND 2.0 http://www.flickr.com/photos/lenscrack/5165225746/ PLOP(musical chairs) rich "I guess this was for musical chairs?" CC BY 2.0 http://www.flickr.com/photos/spine/1009892593/ PLOP(paint) ALL CHROME "SUPER SUNDAY" CC BY-NC-SA 2.0 http://www.flickr.com/photos/allchrome/5423888378/ information disappear(footprint) Jeff Kubina "Footprints" CC BY-ND 2.0 http://www.flickr.com/photos/kubina/21208990/ over there(monkey) Adn! "Worst than jail" CC BY-NC-ND 2.0 http://www.flickr.com/photos/hojas_cayendo/5549137958/ PLOP(musical chairs) niiicedave "IMGP0670cr - Kampout Fresno 2011 - Saturday - Kamptown Races - musical chairs" CC BY-SA 2.0 http:// www.flickr.com/photos/33671002@N00/6144480939/ PLOP(musical chairs) Takahiro Hozumi "musical_chairs" CC BY-SA 2.0 http://www.flickr.com/photos/87914538@N06/8594162617 limited resource era(cat) lincolndisplayimages.com "Arran cat (2)" CC BY-NC 2.0 http://www.flickr.com/photos/robdray/1118614948/ fact(water) Chaval Brasil "Drop in a Dime" CC BY-NC-ND 2.0 http://www.flickr.com/photos/chavals/2869153410/ liberty from place(jump) blinkingidiot "Jump for Joy" CC BY-ND 2.0 http://www.flickr.com/photos/45325473@N04/4910647166/ append only db(library) Thomas Hawk "And I Saw Your Hand With a Loose Grip on a Very Tight Ship" CC BY-NC 2.0 http://www.flickr.com/photos/ thomashawk/85441961/ decompose jobs(lego) Jez Page"257/365 - LEGO" CC BY-NC-SA 2.0 http://www.flickr.com/photos/jezpage/4990873353/ storage service(cast) Paco CT "It is Friday, let's have a drink, or two" CC BY-NC-SA 2.0 http://www.flickr.com/photos/paco_calvino/3513790048/ peer(book) Marwa Morgan "Oldies are Goldies :D" CC BY-NC-ND 2.0 http://www.flickr.com/photos/marwamorgan/2602038800/ transactor(sewing-machine-needle) Theen ... "Stitching Machine" CC BY-NC-SA 2.0 http://www.flickr.com/photos/theenmoy/8407089950/ review(book-cat)raider of gin "cat reading" CC BY 2.0 http://www.flickr.com/photos/fairerdingo/2320356661/ backend variety(colorful-sewing-machine) Hellsgeriatric "Singer Sewing Machine" CC BY-NC-ND 2.0 http://www.flickr.com/photos/hellsgeriatric/ 2037304681/ efficient query(fish) SteveD. "Big Eye Scad, Kona Hawaii" CC BY 2.0 http://www.flickr.com/photos/42507736@N02/6022657611/ time travel(clock) Roby Ferrari "SAF#2" CC BY-SA 2.0 http://www.flickr.com/photos/roberto_ferrari/281640001/ efficient write(car) Design By Zouny "Geneva Car Show 2010" CC BY 2.0 http://www.flickr.com/photos/zouny/5054816002/ schema(book-shelf) Swamibu "Iqra: Read" CC BY-NC 2.0 http://www.flickr.com/photos/swamibu/2868288357/ the design philophy(inner-clock) GuySie "Photo365 #5 - Pretty on the inside" CC BY-SA 2.0 http://www.flickr.com/photos/guysie/5327472911/ the design philophy(blue-pattern) Alex Abian "Alien Technology" CC BY-NC-ND 2.0 http://www.flickr.com/photos/xtyler/3629765611/