操作履歴/時点指定アクセスの実現 - BiTemporal Data Model の実践 / Implementing command history and temporal access
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3BJMT%FWFMPQFS.FFUVQ!0SBDMF$PSQPSBUJPO+BQBO ૢ࡞ཤྺ࣌ࢦఆΞΫηεͷ࣮ݱ #J5FNQPSBM%BUB.PEFMͷ࣮ફ 4BU G 4NBSU)3ΤϯδχΞ CONFIDENTIAL
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ࣗݾհ CONFIDENTIAL
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!G גࣜձࣾ4NBSU)3ॴଐ ΤϯδχΞ ݄ೖࣾ 4NBSU)3ίΞػೳͷอकɾ֦ுΛ୲ CONFIDENTIAL
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ࣾձอݥͷॻྨΛ ࣗಈ࡞ ैۀһใΛ σʔλϕʔεԽ ॴγʔϜϨεʹ ΦϯϥΠϯਃ ਓࣄใΛ Χϯλϯʹऩू ˔˔˔˔ ˔˔˔˔˔˔˔˔ ˔˔˔˔˔˔˔˔ ˔˔˔˔ ˔˔˔˔˔˔˔˔ ˔˔˔˔ ˔˔˔˔˔˔˔˔ ˔˔˔˔ ˔˔˔˔˔˔˔˔ ˔˔˔˔ ˔˔˔˔˔˔˔˔ ˔˔˔˔ ˔˔˔˔˔˔˔˔ ˔˔˔˔ ˔˔˔˔˔˔˔˔ ˔˔˔˔ ˔˔˔˔˔˔˔˔ ˔˔˔˔ ˔˔˔˔˔˔˔˔ ˔˔˔˔ ˔˔˔˔˔˔˔˔ 4NBSU)3ɺਓࣄɾ࿑ʹؔ͢Δखଓ͖ͷ ࣗಈԽΛࢦ͢ΫϥυܕιϑτΣΞͰ͢ɻ
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ߦͷ ిࢠਃ څ༩໌ࡉ ޏ༻ܖॻ ैۀһ%# εϚϗͰ ௐ ࣾձอݥ ޏ༻อݥ ਓࣄɾ࿑Λ෯͘Χόʔʢࠓޙ֦େ͍͖ͯ͠·͢ʣ /FX
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ࠓޙͷํ ݱࡏ ਓࣄ͚ 4BB4 ސ٬ج൫ ʢਓࣄɾैۀһʣ ਓࣄ%# ʢձࣾɾݸਓʣ ஷ·Δࢿ࢈ কདྷ Ξοϓηϧ ϓϩμΫτ ϓϥοτ ϑΥʔϜԽ ۚ༥ ʢ'JO5FDIʣ কདྷ
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ࠓޙͷํ ݱࡏ ਓࣄ͚ 4BB4 ސ٬ج൫ ʢਓࣄɾैۀһʣ ਓࣄ%# ʢձࣾɾݸਓʣ ஷ·Δࢿ࢈ কདྷ Ξοϓηϧ ϓϩμΫτ ϓϥοτ ϑΥʔϜԽ ۚ༥ ʢ'JO5FDIʣ কདྷ ຊͷ
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ਓࣄ%# ब৬ ݁ࠗ ग़࢈ ҟಈ
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4NBSU)3Ͱʜʜ ɾϥΠϑΠϕϯτͰมߋ͕ൃੜ ɹɾೖࣾɺୀࣾɺҾͬӽ͠ɺ݁ࠗɺग़࢈ͳͲ ɾݸਓใͷ͔ͨ·Γ ɹɾࢯ໊ɺॅॴɺۚཧ൪߸ͳͲ มભ͢ΔσʔλͷτϨʔαϏϦςΟͷ֬อ͕ඞཁ ਓࣄ%#
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มભ͢ΔσʔλͷཤྺΛ͍ͨ͠ ࢸߴͷਓࣄ%#ΛٻΊͯʜʜ ཤྺ͕ͤΔΑ͏ʹͳͬͨΒʜ ɾ͋Δ࣌ͰͷσʔλΛҰཡ͍ͨ͠ ɹࣾһɺੈߏɺஉঁൺͳͲͷੳ ɾաڈͷใΛߋ৽͍ͨ͠ ɹͦͯ͠ʮߋ৽ͨ͠ʯͱ͍͏ใͬͯ΄͍͠
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4NBSU)3ຊମ ʹ3VCZPO3BJMTͷ ɹϞϊϦγοΫΞϓϦέʔγϣϯ "DUJWF3FDPSEͰͳΜͱ͔͢Δඞཁ͕͋Δ 4NBSU)33P3ͰͰ͖͍ͯ·͢
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CONFIDENTIAL 3VCZPO3BJMT ☓ ཤྺ
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# db/migrate/*.rb class CreateUsers < ActiveRecord::Migration[5.2] def change create_table :users do |t| t.string :name t.string :email t.timestamps end end end 3VCZPO3BJMTσϑΥϧτ
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# db/schema.rb create_table "users", force: :cascade do |t| t.string "name" t.string "email" t.datetime "created_at", null: false t.datetime "updated_at", null: false end 3VCZPO3BJMTσϑΥϧτ
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UUJNFTUBNQT ɹDSFBUFE@BU VQEBUFE@BU͕࡞ΒΕΔ ཧআ 3VCZPO3BJMTσϑΥϧτ
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ෳճߋ৽͞ΕΔͱɺ࠷৽ͷߋ৽͚͕ͩ Δ ফ͞Εͨใܗͳ͘ͳΔ 3VCZPO3BJMTσϑΥϧτ ͜Ε͚ͩͩͱۀ༻݅తʹݫ͍͠ʜ
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͍Ζ͍Ζͳख๏͕͋ΔͷͰɺ ͬ͘͟Γͱհ 3BJMT☓ཤྺ
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ɾྫQBSBOPJB ɾEFMFUFE@BUΛՃ ɾআ࣌ɺEFMFUFE@BU5JNFDVSSFOU ɾݕࡧ࣌ɺ\EFMFUFE@BUOJM^ͳ ɹείʔϓΛՃ ཧআ
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૿Ճ͢ΔʢࣈɺʣΛ֨ೲͰ͖Δ ΧϥϜΛ༻ҙ ྫWFSTJPO EFMFUFE@BU όʔδϣχϯά ࠷৽ EFMFUFE@BU EFMFUFE@BU EFMFUFE@BU EFMFUFE@BU/6-- WFS WFS WFS WFS
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࣮ྫ EFMFUFE@BUͷ߹ ɾૠೖ ɹಛʹมߋແ͠ ɾআ ɹཧআ όʔδϣχϯά
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࣮ྫ EFMFUFE@BUͷ߹ ɾߋ৽ ɹݱߦϨίʔυΛཧআ ɹߋ৽༰Λૠೖ ɾࢀর ɹ௨ৗཧআͰͳ͍ͷΛݕࡧ ɹաڈͷόʔδϣϯʹΞΫηεཧআ͞Ε͍ͯΔͷΛݕࡧ όʔδϣχϯά
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<JE ݅ΧϥϜ>Ͱ ෳ߹ओΩʔతͳऔѻ͍ʹͳΔ ݱࡏͷใͱཤྺΛಉҰςʔϒϧͰ ཧ͢ΔͨΊɺ ϢχʔΫ੍ϦϨʔγϣϯͳͲͰߟྀ͕ඞཁ ཧআɺόʔδϣχϯά
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ผͷςʔϒϧʹίϐʔ Γ͔ͨ ɾ%#ͷτϦΨʔ ɾΞϓϦέʔγϣϯͰߋ৽ɾআॲཧΛϑοΫ ίϐʔ༰ ɾϨίʔυͷશ༰ ɾࠩ ཤྺςʔϒϧ
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τϦΨʔͰίϐʔ ΞϓϦέʔγϣϯʹมߋ͕͍Βͳ͍ ݱߦσʔλͱࠞ͡Βͳ͍ͷͰѻ͍͍͢ ੑೳ໘ͰϝϦοτ͋Γ ݱߦσʔλͱཤྺΛࠞͥͯදࣔ͢Δͷ໘ ɹʢͱ͘ʹؔ࿈ʣ ཤྺςʔϒϧ
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ɾྫQBQFS@USBJM BVEJUFE ɾߋ৽༰ΛγϦΞϥΠζͯ͠ ɹผςʔϒϧʹૠೖ ɾࠩΛٯॱʹద༻͍ͯ͘͜͠ͱͰ ɹϩʔϧόοΫ ʢ4NBSU)3ͰҎલ͍ͬͯͨʣ ཤྺςʔϒϧ
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ɾΞϓϦέʔγϣϯϩά ɾ%#ͷ1*53 ɾ%#ࣗମͷػೳ ɹ.BSJB%#ʜ4ZTUFNWFSTJPOFE5BCMFT ɹ0SBDMFʜ*O%BUBCBTF"SDIJWJOH ͳͲ ཁ݅ίετʹԠͯ͡ݕ౼͕ඞཁ ͦͷଞ
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2ɿ͍ͣΕ͔ͷํ๏Ͱ ɹɹཁΛຬͨͤͦ͏͔ʁ CONFIDENTIAL
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̖ɿͨͪͷٻΊΔͷʹ ɹɹಧ͔ͳ͔ͬͨ CONFIDENTIAL
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มભ͢ΔσʔλͷཤྺΛ͍ͨ͠ ʢ͓͞Β͍ ࢸߴͷਓࣄ%#ΛٻΊͯʜʜ ཤྺ͕ͤΔΑ͏ʹͳͬͨΒʜ ɾ͋Δ࣌ͰͷσʔλΛҰཡ͍ͨ͠ ɹࣾһɺੈߏɺஉঁൺͳͲͷੳ ɾաڈͷใΛߋ৽͍ͨ͠ ɹͦͯ͠ʮߋ৽ͨ͠ʯͱ͍͏ใͬͯ΄͍͠
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ͳʹ͔ͳ͍ͷ͔ʜʜ CONFIDENTIAL
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ʊਓਓਓਓਓਓਓਓਓਓਓਓʊ ʼɹBiTemporal Data Modelɹʻ ʉY^Y^Y^Y^Y^Y^Y^Y^Y^Y^Y^Y^ʉ
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CONFIDENTIAL #J5FNQPSBM%BUB.PEFM
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CONFIDENTIAL #J5FNQPSBM%BUB.PEFM ͭͷ ࣌ؒతͳ
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OPOUFNQPSBMEBUBNPEFM VOJUFNQPSBMEBUBNPEFM CJUFNQPSBMEBUBNPEFM
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OPOUFNQPSBMEBUBNPEFM %FMFUF *OTFSU 6QEBUF ࠷৽ใͷεφοϓγϣοτΛදݱ
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OPOUFNQPSBMEBUBNPEFM ೖࣾ *% ৬
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OPOUFNQPSBMEBUBNPEFM *% ৬ ˠ෦ ෦ʹঢ֨
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OPOUFNQPSBMEBUBNPEFM *% OBNF ෦ ୀ৬
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VOJUFNQPSBMEBUBNPEFM %FMFUF *OTFSU 6QEBUF ͦͷϨίʔυ͕༗ޮͳ࣌ؒΛͨͤΔ
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VOJUFNQPSBMEBUBNPEFM *% ৬ ։࢝ ऴྃ 㱣 ೖࣾ ༗ޮظؒ
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VOJUFNQPSBMEBUBNPEFM ෦ʹঢ֨ #FGPSF "GUFS ʿ ʔ ʿ ʔ ෦ আ
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VOJUFNQPSBMEBUBNPEFM *% ৬ ։࢝ ऴྃ 㱣ˠ ෦ʹঢ֨
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VOJUFNQPSBMEBUBNPEFM *% ৬ ։࢝ ऴྃ 㱣ˠ ෦ 㱣 ෦ʹঢ֨
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VOJUFNQPSBMEBUBNPEFM ୀࣾ #FGPSF ʿ "GUFS ʔ ෦ ෦ ʔ
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VOJUFNQPSBMEBUBNPEFM *% ৬ ։࢝ ऴྃ ෦ 㱣ˠ ୀ৬
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Αͦ͞͏ VOJUFNQPSBMEBUBNPEFM
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VOJUFNQPSBMEBUBNPEFM ʮdʰʱͩͬͨ͜ͱ͕ൃ֮ʯ #FGPSF "GUFS ʔ ෦ ෦ ʔ
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VOJUFNQPSBMEBUBNPEFM *% ৬ ։࢝ ऴྃ ˠ ෦ ʮdͷظؒʰʱͩͬͨʯ͜ͱ͕ൃ֮
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VOJUFNQPSBMEBUBNPEFM *% ৬ ։࢝ ऴྃ ˠ ෦ ʮdͷظؒʰʱͩͬͨʯ͜ͱ͕ൃ֮
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VOJUFNQPSBMEBUBNPEFM *% ৬ ։࢝ ऴྃ ˠ ෦ ʮdͷظؒʰʱͩͬͨʯ͜ͱ͕ൃ֮ ͱ͍͏ใ͕Ͳ͜ʹͳ͍ʂ
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༗ޮظؒͱϨίʔυͷૢ࡞͕࣌ؒಉ͡Ͱ͋Ε ͳ͍͕ɺաڈͷཤྺૢ࡞͕ൃੜͯ͘͠Δͱ ༗ޮظؒͱૢ࡞࣌ؒΒΒʹͳΔɻ ઌఔͷྫͰʮ༗ޮظ͕ؒมߋ͞Εͨʯͱ͍͏ه͕ දݱͰ͖͍ͯͳ͔ͬͨɻ VOJUFNQPSBMEBUBNPEFM
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ɾ༗ޮظؒ ɾγεςϜతͳ࣌ؒ ͭͷ࣌ؒ࣠Λผʑʹཧ͢Δඞཁੑ ˰#J5FNQPSBMEBUBNPEFM
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CJUFNQPSBMEBUBNPEFM U U
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*% ৬ ։࢝ ऴྃ Ճ আ 㱣 㱣 ೖࣾ ༗ޮظؒ γεςϜతͳظؒ CJUFNQPSBMEBUBNPEFM
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CJUFNQPSBMEBUBNPEFM ෦ʹঢ֨ #FGPSF "GUFS ʿ ʔ ʿ ʔ ʔ ෦ আ
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*% ৬ ։࢝ ऴྃ Ճ আ 㱣 㱣ˠ ෦ʹঢ֨ CJUFNQPSBMEBUBNPEFM
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*% ৬ ։࢝ ऴྃ Ճ আ 㱣 㱣ˠ 㱣 ෦ 㱣 㱣 ෦ʹঢ֨ CJUFNQPSBMEBUBNPEFM
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CJUFNQPSBMEBUBNPEFM ୀࣾ #FGPSF ʿ "GUFS আ
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*% ৬ ։࢝ ऴྃ Ճ আ 㱣 㱣 ෦ 㱣 㱣ˠ ୀࣾ CJUFNQPSBMEBUBNPEFM
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*% ৬ ։࢝ ऴྃ Ճ আ 㱣 㱣 ෦ 㱣 㱣ˠ ෦ 㱣 ୀࣾ CJUFNQPSBMEBUBNPEFM
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CJUFNQPSBMEBUBNPEFM #FGPSF ʮdͷظؒʰʱͩͬͨʯ͜ͱ͕ൃ֮ "GUFS
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*% ৬ ։࢝ ऴྃ Ճ আ 㱣 㱣ˠ ෦ 㱣 ෦ 㱣 ʮdͷظؒʰʱͩͬͨʯ͜ͱ͕ൃ֮ CJUFNQPSBMEBUBNPEFM
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*% ৬ ։࢝ ऴྃ Ճ আ 㱣 㱣ˠ 㱣 ՝ 㱣 ෦ 㱣 ෦ 㱣 ʮdͷظؒʰʱͩͬͨʯ͜ͱ͕ൃ֮ CJUFNQPSBMEBUBNPEFM
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Α͘Θ͔Γ·ͨ͠Ͷ CONFIDENTIAL
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4NBSU)3ຊମ ʹ3VCZPO3BJMTͷ ɹϞϊϦγοΫΞϓϦέʔγϣϯ "DUJWF3FDPSEͰͳΜͱ͔͢Δඞཁ͕͋Δ ͓͞Β͍ɿ4NBSU)33P3ͰͰ͖͍ͯ·͢
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CONFIDENTIAL "DUJWF3FDPSE#J5FNQPSBM
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Έ *% ৬ ։࢝ ऴྃ Ճ আ 㱣 㱣 ෦ 㱣 㱣 JE CJUFNQPSBM@JE QPTJUJPO WBMJE@GSPN WBMJE@UP DSFBUFE@BU EFMFUFE@BU 㱣 㱣 ෦ 㱣 㱣 σʔλϕʔεͰදݱ
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Έ JE CJUFNQPSBM@JE QPTJUJPO WBMJE@GSPN WBMJE@UP DSFBUFE@BU EFMFUFE@BU 㱣 JEʜ3BJMTඪ४ CJUFNQPSBM@JE ʜૢ࡞ରΛҰҙʹ͢ΔͨΊͷ*%
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Έ JE CJUFNQPSBM@JE QPTJUJPO WBMJE@GSPN WBMJE@UP DSFBUFE@BU EFMFUFE@BU 㱣 WBMJE@GSPN WBMJE@UPʜ༗ޮظؒ DSFBUFE@BU EFMFUFE@BUʜγεςϜظؒ
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Ϟσϧʹ"3#J5FNQPSBM༻Λ༻ҙ ./bin/rails generate model User \ name:string \ bitemporal_id:integer \ valid_from:datetime \ valid_to:datetime \ deleted_at:datetime ར༻ํ๏
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Έ irb(main):002:0> User.find(1) User Load (0.8ms) SELECT "users".* FROM "users" WHERE "users"."deleted_at" IS NULL AND "users"."valid_from" <= '2019-03-10 07:40:32.238952' AND "users"."valid_to" > '2019-03-10 07:40:32.238952' AND "users"."bitemporal_id" = $1 LIMIT $2 [["bitemporal_id", 1], ["LIMIT", 1]] ҎԼΛࣗಈతʹ࣮ࢪ ɾআ͞Ε͍ͯͳ͍͔ͷఆ ɾ༗ޮ͔Ͳ͏͔ͷఆ ɾJEΛCJUFNQPSBM@JEʹಡΈସ͑
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ݱ࣌ͷσʔλʹΞΫηε͢ΔͨΊͷ ΠϯλʔϑΣʔε΄΅௨ৗͷ"DUJWF3FDPSEͱಉ͡ ར༻ํ๏ Company.where(city: 'Tokyo') user = User.find(123) user.destroy
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͍͔ͭ͘ͷϝιουΛՃ ɾWBMJE@BU ར༻ํ๏ # 1લͷσʔλʹΞΫηε Company.valid_at(1.year.ago).where(city: 'Tokyo') # ϦϨʔγϣϯḷΕΔʂ company = Company.valid_at(1.year.ago).take company.employees # 1લͷैۀһใΛऔಘ
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͍͔ͭ͘ͷϝιουΛՃ ɾJHOPSF@WBMJE@EBUFUJNF ར༻ํ๏ # ͋ΔϢʔβʔͷมߋཤྺΛੜ User.ignore_valid_datetime .where(bitemporal_id: param[:id]) .order(:valid_from)
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CONFIDENTIAL ಋೖ
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"3#J5FNQPSBMΛಋೖͯ͠Έ ͯΘ͔ͬͨ͜ͱʜ CONFIDENTIAL
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͍Ζ͍ΖͭΒ͍ʂʂʂ CONFIDENTIAL
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ͭΒ͍ϙΠϯτʢʣϢχʔΫ੍ ༗ޮظؒॏͳΓ߹Θͳ͍͕ͣʜʜ
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ͭΒ͍ϙΠϯτʢʣϢχʔΫ੍ ॏͳͬͯΔ
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Ͱ ϢχʔΫʹͳΔ͕ͣɺͳ͔ͥ༗ޮظؒͷ ॏͳΔσʔλ͕ੜ·Εͨ ظؒॏෳνΣοΫ༻ΧελϜόϦσʔγϣ ϯ࡞ͬͯ͋ͬͨΜ͚ͩͲʜʜ ͭΒ͍ϙΠϯτʢʣϢχʔΫ੍
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˰%#ϨϕϧͰ߹ੑΛ୲อͨ͠΄͏͕͍͍ ͭΒ͍ϙΠϯτʢʣϢχʔΫ੍ -- ॏͳΓνΣοΫ (PostgreSQL) ALTER TABLE users ADD EXCLUDE USING GIST (bitemporal_id WITH =, tsrange(valid_from, valid_to) WITH &&, COALESCE(deleted_at, '9999-12-31 00:00:00')WITH =);
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ɾ%#্ͷओΩʔAJEAͷ·· ɾ࣮ࡍͷΞΫηε࣌ ɹ ɹෳ߹݅ ɾΠϯελϯεʹJE͢ΔͱCJUFNQPSBM@JE͕ฦΔ ͜ΕͰ֓Ͷͳ͍ͷ͕ͩʜʜ ͭΒ͍ϙΠϯτʢʣϓϥΠϚϦʔΩʔ
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ੜͷओΩʔΛ෦Ͱ͍ͬͯΔ Ұ෦ͷ(FN͕յΕΔ ɹɾBDUT@BT@MJTU BODFTUSZ ɹɹBDUJWFSFDPSEJNQPSU ˰ϞϯΩʔύον ɹPSఘΊΔʜʜʢΘͳ͍Α͏मਖ਼ʣ ͭΒ͍ϙΠϯτʢʣϓϥΠϚϦʔΩʔ
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࡞ιʔτɺߋ৽ιʔτ ɾϨίʔυ͕Ճ͞ΕΔҰํ ɾաڈʹ͔͞ͷ΅ͬͯσʔλΛมߋͰ͖Δ ௨ৗͷ֓೦่͕յ ˰ཁ݅ʹԠͯ͡దٓௐ ͭΒ͍ϙΠϯτʢʣιʔτ
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ɾ҉తͳιʔτ ɹGJSTU MBTU҉తʹ ɹ03%&3#:\QSJNBSZ@LFZ^͍ͯ͠Δ ˰ཁ݅ʹԠͯ͡ௐ ˞3BJMT͔ΒJNQMJDJU@PSEFS@DPMVNOͰ ɹ੍ޚՄೳ ͭΒ͍ϙΠϯτʢʣιʔτ
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61%"5& %&-&5&ͰϨίʔυ͕ੜ·ΕΔ ˰ͱͱγϟʔσΟϯά͍ͯ͠ΔͷͰɺ ɹߜΓࠐΈൣғݶఆ͞Ε͍ͯͨ ɹʰ4NBSU)3σʔλϕʔεҠߦϓϩδΣΫτͷཪଆʱ ˰ΠϯσοΫε͕ޮ͍ͯΔ͠ࠓͷͱ͜Ζେৎͦ͏ ɹϠό͘ͳ͖ͬͯͨΒߟ͑Α͏ʜʜ ͭΒ͍ϙΠϯτʢʣੑೳ
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"DUJWF3FDPSEͷόʔδϣϯΞοϓै 3BJMTେৎ͔ͳʜʜ ͭΒ͘ͳΔ͔͠Εͳ͍ϙΠϯτ
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CONFIDENTIAL ݁Ռ
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࣌ΞΫηε
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࣌ΞΫηε
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࣌ΞΫηε
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มߋཤྺ
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มߋཤྺ
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αΫηεʂʂʂ CONFIDENTIAL ʢཤྺใͷߋ৽ʹ͍ͭͯ͏গʑ͓ͪԼ͍͞ʜʜʣ
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CONFIDENTIAL ࠷ޙʹ
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Έͳ͞Μ "DUJWF3FDPSE#J5FNQPSBMΛ ͍ͨ͘ͳ͖ͬͯͨΜ͡Όͳ͍ Ͱ͠ΐ͏͔
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"DUJWF3FDPSE#J5FNQPSBM ຊΑΓ044Ͱ͢ʂ 13͓͓ͪͯ͠Γ·͢ʂʂ
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CONFIDENTIAL ͓͠·͍
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