{"id":38654,"date":"2019-10-31T22:25:05","date_gmt":"2019-10-31T19:25:05","guid":{"rendered":"https:\/\/prohoster.info\/blog\/reliz-postgresql-12\/"},"modified":"2019-10-31T22:25:05","modified_gmt":"2019-10-31T19:25:05","slug":"reliz-postgresql-12","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/reliz-postgresql-12","title":{"rendered":"PostgreSQL 12 v\u00e4ljaanne","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>PostgreSQL arendajate r\u00fchm teatas PostgreSQL 12 v\u00e4ljaandmisest, mis on uusima versioon r\u00e4latsioonilisest andmebaasis\u00fcsteemist avatud l\u00e4htekoodiga.<br \/>\nPostgreSQL 12-s on oluliselt paranenud p\u00e4ringute j\u00f5udlus \u2013 see kehtib eriti suurte andmemahtude t\u00f6\u00f6tlemise puhul, samuti on optimeeritud \u00fcldiselt ketasruumi kasutus.<\/p>\n<p>Uute v\u00f5imaluste seas:<\/p>\n<ul>\n<li>JSON Path p\u00e4ringukeele rakendamine (SQL\/JSON standardi oluline osa);<\/li>\n<li>\u00dcldiste tabeliv\u00e4ljendite (WITH) t\u00e4itmise optimeerimine;<\/li>\n<li>Generatsioonisammude tugi;<\/li>\n<\/ul>\n<p>Kogukond j\u00e4tkab PostgreSQL laiendatavuse ja usaldusv\u00e4\u00e4rsuse arendamist, arendades rahvusvahelisuse, autentimisseoste ja s\u00fcsteemi haldamise lihtsustamise v\u00f5imalusi.<\/p>\n<p>Sellesse v\u00e4ljaandesse kuulub rakenduse \u00fchendatava salvestusmootori liidese rakendamine, mis v\u00f5imaldab arendajatel luua oma andmete salvestamise meetodeid.<\/p>\n<p><strong>Tegutsemise parendused<\/strong><\/p>\n<p>PostgreSQL 12 sisaldab olulisi j\u00f5udlusparandusi ja hooldusprotseduure indeksite ja sektsioneerimise s\u00fcsteemides.<\/p>\n<p>B-tree indeksid on PostgreSQLi standardne indekseerimise t\u00fc\u00fcp, mis optimeeriti versioonis 12 sagedaste indeksimuudatustega koormuste jaoks. PostgreSQL 12 jaoks l\u00e4biviidud TPC-C standardtest n\u00e4itas keskmiselt 40% ruumikasutuse v\u00e4henemist ja \u00fcldist p\u00e4ringute j\u00f5udluse kasvu.<\/p>\n<p>Osakestega tabelitele suunatud p\u00e4ringud on saanud m\u00e4rkimisv\u00e4\u00e4rseid t\u00e4iustusi, eriti tuhandete osadega tabelite puhul, mis eeldavad t\u00f6\u00f6tlemist vaid piiratud andmemassiivide osadega. Andmete lisamise j\u00f5udlust osakestega tabelitesse koos INSERT ja COPY-iga on parendatud, samuti on n\u00fc\u00fcd v\u00f5imalik lisada uut osa ilma k\u00e4imasolevaid p\u00e4ringuid blokeerimata.<\/p>\n<p>PostgreSQL 12-s on tehtud t\u00e4iendavad t\u00e4iustused indekseerimises, mis m\u00f5jutavad \u00fcldist j\u00f5udlust, sealhulgas:<\/p>\n<ul>\n<li>WAL-i genereerimise kulude v\u00e4henemine GiST, GIN ja SP-GiST indeksit\u00fc\u00fcpide jaoks;<\/li>\n<li>v\u00f5imalus luua nn katteindekseid (covering indexes, v\u00f5imalus INCLUDE) GiST-indeksitele;<\/li>\n<li>v\u00f5imalus teha \"l\u00e4hedaste naabrite\" (k-NN search) p\u00e4ringuid kauguse operaatori (&lt;-&gt;) abil ja SP-GiST indeksite kasutamisega;<\/li>\n<li>toetab k\u00f5ige levinumate v\u00e4\u00e4rtuste statistika kogumist (most-common value, MCV) CREATE STATISTICS abil, mis aitab saavutada paremaid p\u00e4ringute t\u00e4itmisplaane, kui kasutatakse veerge, mille v\u00e4\u00e4rtused on ebav\u00f5rdselt jaotatud.<\/li>\n<\/ul>\n<p>JIT-kompileerimine, mis kasutab LLVM-i ja mis ilmus PostgreSQL 11-s, on n\u00fc\u00fcd vaikimisi sisse l\u00fclitatud. JIT-kompileerimine v\u00f5imaldab parandada j\u00f5udlust, kui t\u00f6\u00f6tatakse WHERE-klausli, sihtloendite, aggregeerimiste ja m\u00f5ningate sisemiste operatsioonidega. See on saadaval, kui olete PostgreSQL-i kompileerinud LLVM-iga v\u00f5i kasutate PostgreSQL-i paketti, mis on loodud LLVM-i sissel\u00fclitamisega.<\/p>\n<p><strong>SQL keele ja standardiga \u00fchilduvuse parendused<\/strong><\/p>\n<p>PostgreSQL 12-s on tekkinud v\u00f5imalus esitada p\u00e4ringuid JSON dokumentide kohta SQL\/JSON standardses m\u00e4\u00e4ratletud JSON teeavaldiste kaudu. Sellised p\u00e4ringud saavad kasutada olemasolevaid indekseerimist mehhanisme JSONB formaadis salvestatud dokumentide jaoks, et andmeid t\u00f5husalt ekstraheerida.<\/p>\n<p>\u00dcldised tabeliv\u00e4ljendid, tuntud ka kui WITH-i laused, saavad PostgreSQL 12-s n\u00fc\u00fcd automaatselt t\u00e4ituda asendusega, mis omakorda v\u00f5ib aidata suurendada paljude olemasolevate p\u00e4ringute j\u00f5udlust. Uues versioonis v\u00f5ib osa WITH-i p\u00e4ringust t\u00e4ituda asendusega ainult siis, kui see ei ole rekursiivne, tal ei ole k\u00f5rvalm\u00f5jusid ning sellega viidatakse ainult \u00fcks kord j\u00e4rgmises p\u00e4ringu osas.<\/p>\n<p>PostgreSQL 12 toob sisse toetuse 'genereeritud veergude' jaoks. SQL-standardis kirjeldatud see veeru t\u00fc\u00fcp arvutab v\u00e4\u00e4rtuse, l\u00e4htudes teistest veergudest samas tabelis. Selles versioonis toetab PostgreSQL 'salvestatavaid genereeritud veerge', kus arvutatud v\u00e4\u00e4rtus salvestatakse kettale.<\/p>\n<p><strong>Rahvusvaheline teema<\/strong><\/p>\n<p>PostgreSQL 12 laiendab ICU-vastavuse tuge, v\u00f5imaldades kasutajatel m\u00e4\u00e4ratleda 'moodustatud vastavusi', mis n\u00e4iteks v\u00f5imaldavad v\u00f5rdlusi, mis ei arvesta suurt\u00e4hti v\u00f5i aktsente.<\/p>\n<p><strong>Autentimine<\/strong><\/p>\n<p>PostgreSQL laiendab oma toetust usaldusv\u00e4\u00e4rsetele autentimismeetoditele mitmete t\u00e4iustustega, mis pakuvad lisaturvalisust ja funktsionaalsust. K\u00e4esolevas versioonis on esitatud klient- ja serveripoolne kr\u00fcpteerimine autentimiseks GSSAPI liideste kaudu ning PostgreSQL suudab tuvastada <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/et\/server\/\"   title=\"serverid\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1845\">serverid<\/a> LDAP, kui PostgreSQL on kompileeritud koos OpenLDAP-iga.<\/p>\n<p>Lisaks toetab PostgreSQL 12 n\u00fc\u00fcd mitme faktori autentimise varianti. N\u00fc\u00fcd saab PostgreSQL server n\u00f5uda kliendilt kehtiva <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/et\/ssl-sertifikat\/\"   title=\"SSL\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2262\">SSL<\/a>-sertifikaadi esitamist vastava kasutajanimega, kasutades clientcert=verify-full, ja kombineerida seda eraldi autentimismeetodi n\u00f5udmisega (nt scram-sha-256).<\/p>\n<p><strong>Haldamine<\/strong><\/p>\n<p>PostgreSQL 12 tutvustab v\u00f5imalust teostada mittes\u00fcsteemne indekseerimine k\u00e4su REINDEX CONCURRENTLY abil. See v\u00f5imaldab kasutajatel v\u00e4ltida andmebaasi seisakuid pikaajaliste indeksite \u00fcmberkujundamise ajal.<\/p>\n<p>Lisaks on PostgreSQL 12-s v\u00f5imalik aktiveerida v\u00f5i deaktiveerida lehek\u00fclgede kontrollsummad klastris, mis on v\u00e4lja l\u00fclitatud, pg_checksums k\u00e4su abil. Varem sai lehek\u00fclgede kontrollsummal \u2014 funktsiooni, mis aitab kontrollida andmete terviklikkust, mis on salvestatud kettale \u2014 aktiveerida ainult PostgreSQL klastrite initsialiseerimise ajal initdb abil.<\/p>\n<p>Allikas: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"http:\/\/www.linux.org.ru\/news\/opensource\/15269122\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0413\u0440\u0443\u043f\u043f\u0430 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 PostgreSQL \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e \u0432\u044b\u0445\u043e\u0434\u0435 PostgreSQL 12, \u043d\u043e\u0432\u0435\u0439\u0448\u0435\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u0440\u0435\u043b\u044f\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0431\u0430\u0437\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0441 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u043c \u0438\u0441\u0445\u043e\u0434\u043d\u044b\u043c \u043a\u043e\u0434\u043e\u043c. \u0412 PostgreSQL 12 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u2013 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e \u044d\u0442\u043e \u043a\u0430\u0441\u0430\u0435\u0442\u0441\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0431\u043e\u043b\u044c\u0448\u0438\u043c\u0438 \u043e\u0431\u044a\u0451\u043c\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445, \u0442\u0430\u043a\u0436\u0435 \u043f\u0440\u043e\u0438\u0437\u0432\u0435\u0434\u0435\u043d\u0430 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0434\u0438\u0441\u043a\u043e\u0432\u043e\u0433\u043e \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0430 \u0432 \u0446\u0435\u043b\u043e\u043c. \u0421\u0440\u0435\u0434\u0438 \u043d\u043e\u0432\u044b\u0445 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0435\u0439: \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u044f\u0437\u044b\u043a\u0430 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 JSON Path (\u0432\u0430\u0436\u043d\u0435\u0439\u0448\u0435\u0439 \u0447\u0430\u0441\u0442\u0438 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430 SQL\/JSON); [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-38654","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0413\u0440\u0443\u043f\u043f\u0430 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 PostgreSQL \u043e\u0431\u044a\u044f\u0432\u0438\u043b\u0430 \u043e \u0432\u044b\u0445\u043e\u0434\u0435 PostgreSQL 12, \u043d\u043e\u0432\u0435\u0439\u0448\u0435\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u0440\u0435\u043b\u044f\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b \u0443\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u044f \u0431\u0430\u0437\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445 \u0441 \u043e\u0442\u043a\u0440\u044b\u0442\u044b\u043c \u0438\u0441\u0445\u043e\u0434\u043d\u044b\u043c \u043a\u043e\u0434\u043e\u043c. \u0412 PostgreSQL 12 \u0437\u043d\u0430\u0447\u0438\u0442\u0435\u043b\u044c\u043d\u043e \u0443\u043b\u0443\u0447\u0448\u0435\u043d\u0430 \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u2013 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e \u044d\u0442\u043e \u043a\u0430\u0441\u0430\u0435\u0442\u0441\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441 \u0431\u043e\u043b\u044c\u0448\u0438\u043c\u0438 \u043e\u0431\u044a\u0451\u043c\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445, \u0442\u0430\u043a\u0436\u0435 \u043f\u0440\u043e\u0438\u0437\u0432\u0435\u0434\u0435\u043d\u0430 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\u043e\u0431\u044a\u0451\u043c\u0430\u043c\u0438 \u0434\u0430\u043d\u043d\u044b\u0445, \u0442\u0430\u043a\u0436\u0435 \u043f\u0440\u043e\u0438\u0437\u0432\u0435\u0434\u0435\u043d\u0430 \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0430\u0446\u0438\u044f \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f \u0434\u0438\u0441\u043a\u043e\u0432\u043e\u0433\u043e \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0430 \u0432 \u0446\u0435\u043b\u043e\u043c. \u0421\u0440\u0435\u0434\u0438 \u043d\u043e\u0432\u044b\u0445 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0435\u0439: \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f \u044f\u0437\u044b\u043a\u0430 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 JSON Path (\u0432\u0430\u0436\u043d\u0435\u0439\u0448\u0435\u0439 \u0447\u0430\u0441\u0442\u0438 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u0430 SQL\/JSON);\" \/>\n\t\t<meta property=\"og:url\" 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