{"id":38636,"date":"2019-10-31T22:24:58","date_gmt":"2019-10-31T19:24:58","guid":{"rendered":"https:\/\/prohoster.info\/blog\/reliz-subd-postgresql-12\/"},"modified":"2019-10-31T22:24:58","modified_gmt":"2019-10-31T19:24:58","slug":"reliz-subd-postgresql-12","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/reliz-subd-postgresql-12","title":{"rendered":"PostgreSQL andmebaasi 12 v\u00e4ljaanne","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>P\u00e4rast aastat arendust <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/about\/news\/1976\/\">on avaldatud<\/a><\/noindex> uus stabiilne PostgreSQL andmebaasi haru 12. Uue haru uuendused <noindex><a rel=\"nofollow\" href=\"http:\/\/www.postgresql.org\/support\/versioning\/\">ilmuvad<\/a><\/noindex> viie aasta jooksul kuni novembrini 2024. <\/p>\n<p>Peamised <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/12\/static\/release-12.html\">uuendused<\/a><\/noindex>:<\/p>\n<ul>\n<li class=\"l\"> Lisatud tugi &#171;<noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/12\/ddl-generated-columns.html\">genereeritud veergudele<\/a><\/noindex>&#171;, mille v\u00e4\u00e4rtus arvutatakse v\u00e4ljendi alusel, mis katab teiste samas tabelis olevate veergude v\u00e4\u00e4rtused (sarnane vaadetele, aga \u00fcksikutele veergudele). Genereeritud veerud v\u00f5ivad olla kahte t\u00fc\u00fcpi &#8212; salvestatud ja virtuaalsed. Esimeses juhul arvutatakse v\u00e4\u00e4rtus andmete lisamise v\u00f5i muutmise hetkel, teises &#8212; iga lugemise ajal, l\u00e4htudes teiste veerude praegusest olekust. Praegu toetab PostgreSQL ainult salvestatud genereeritud veerge;\n<li class=\"l\"> Lisatud v\u00f5imalus p\u00e4ringute tegemiseks JSON-dokumentidest kasutades <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/12\/functions-json.html#FUNCTIONS-SQLJSON-PATH\">Path-v\u00e4ljendeid<\/a><\/noindex>, mis meenutavad <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/XPath\">XPath<\/a><\/noindex> ja on m\u00e4\u00e4ratletud SQL\/JSON standardis. Selliste v\u00e4ljendite t\u00f6\u00f6tlemise efektiivsuse suurendamiseks JSONB vormingus dokumentide puhul rakendatakse olemasolevaid indekseerimise mehhanisme;\n<li class=\"l\"> Vaikimisi on sisse l\u00fclitatud JIT-kompilaatori (Just-in-Time) rakendamine, mis p\u00f5hineb LLVM-l, et kiirendada m\u00f5nede avalduste t\u00e4itmist SQL-p\u00e4ringu t\u00f6\u00f6tlemise ajal. N\u00e4iteks on JIT rakendatav avalduste t\u00e4itmise kiirendamiseks &#171;WHERE&#187; plokkide, v\u00e4ljaliste loendite (target lists), agregaatavaldiste ja m\u00f5nede sisemiste operatsioonide puhul;\n<li class=\"l\"> Indekseerimise j\u00f5udlus on oluliselt paranenud. B-puu indeksid on optimeeritud t\u00f6\u00f6tamiseks, kus indeksid muutuvad tihti \u2014 TPC-C testides t\u00e4heldatakse \u00fcldist j\u00f5udluse kasvu ja keskmiselt 40% v\u00e4iksemat ketta ruumikoormust. GiST, GIN ja SP-GiST indeksite eelkirjutuslogi (WAL) genereerimise kulud on v\u00e4hendatud. GiST-le on lisatud v\u00f5imalus luua k\u00e4ttev\u00f5tte indekseid (INCLUDE v\u00e4ljendiga), mis h\u00f5lmavad t\u00e4iendavaid veerge. Operatsioonis <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/12\/sql-createstatistics.html\">CREATE STATISTICS<\/a><\/noindex> on tagatud toetus t\u00fc\u00fcpiliste v\u00e4\u00e4rtuste statistika (MCV) jaoks, mis v\u00f5imaldab genereerida t\u00f5husamaid p\u00e4ringute plaane eba\u00fchtlaselt jaotatud sammaste kasutamisel;\n<li class=\"l\"> Partitsioneerimise rakendamine on optimeeritud p\u00e4ringute jaoks, mis h\u00f5lmavad tuhandeid sektsioone, kuid piirdub piiratud andmealuse alamhulga valimisega. Andmete lisamise j\u00f5udlust on parandatud partitsioneeritud tabelitesse INSERT ja COPY operatsioonide abil ning tagatud on uus sektsioonide lisamise v\u00f5imalus l\u00e4bi \u201eALTER TABLE ATTACH PARTITION\u201c ilma p\u00e4ringute t\u00e4itmise blokeerimiseta;\n<li class=\"l\"> Lisatud tugi automaatsele inline-lahtiharimisele \u00fcldiste tabeliv\u00e4ljendite (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/12\/queries-with.html\">Common Table Expression<\/a><\/noindex>, CTE), mis v\u00f5imaldavad kasutada ajutisi nimelisi tulemuste kogumeid, m\u00e4\u00e4ratlemiseks kasutatakse operaatorit WITH. Inline-lahtiharimine v\u00f5imaldab t\u00f5sta enamiku p\u00e4ringute j\u00f5udlust, kuid praegu rakendatakse seda ainult mitterekursiivsete CTE-de jaoks;\n<li class=\"l\"> Lisatud tugi <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/12\/collation.html#COLLATION-NONDETERMINISTIC\">deterministlikud<\/a><\/noindex> kohanduse omadused \u00abCollation\u00bb, mis v\u00f5imaldab seadistada sortimise reegleid ja m\u00e4rkide v\u00f5rdlemise meetodeid, arvestades s\u00fcmbolite t\u00e4hendust (n\u00e4iteks sortimisel arvestatakse numbriliste v\u00e4\u00e4rtuste puhul miinusm\u00e4rgi ja punkti olemasolu enne numbrit ning erinevaid kirjutamisv\u00f5tteid, samas kui v\u00f5rdlemisel ei arvestata s\u00fcmbolite suurt\u00e4hti ja r\u00f5hum\u00e4rke);\n<li class=\"l\"> Kliendi mitmefaktorilise autentimise tugi on lisatud, v\u00f5imaldades pg_hba.conf-is SSL-sertifikaadi (clientcert=verify-full) autentimist kombineerida t\u00e4iendava autentimismeetodiga, nagu scram-sha-256;\n<li class=\"l\"> Loodud on tuvastamise toetus LDAP-serverite jaoks DNS SRV record'ide p\u00f5hjal, kui PostgreSQL on kokku pandud OpenLDAP-iga; <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/12\/gssapi-auth.html\">GSSAPI<\/a><\/noindex>, nii kliendi kui ka serveri poolel;\n<li class=\"l\"> Lisatud toetus LDAP-serverite m\u00e4\u00e4ramiseks \u00abDNS SRV\u00bb kirjete alusel, kui PostgreSQL on kompileeritud koos OpenLDAP-iga;\n<li class=\"l\"> Lisatud tehing \u00ab<noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/12\/sql-reindex.html#SQL-REINDEX-CONCURRENTLY\">REINDEX CONCURRENTLY<\/a><\/noindex>\u00bb indeksite \u00fcmberkorraldamiseks ilma indeksisse kirjutamise operatsioonide blokeerimiseta;\n<li class=\"l\"> pg_checksums <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/12\/app-pgchecksums.html\">, mis v\u00f5imaldab olemasolevas andmebaasis l\u00fclitada sisse ja v\u00e4lja kontrollsumma kontrollimist andmelehtede jaoks (varem toetas see operatsioon ainult andmebaasi initsialiseerimisel);<\/a><\/noindex>Tagatud on edenemise n\u00e4itaja kuvamine CREATE INDEX, REINDEX, CLUSTER, VACUUM FULL ja pg_checksums operatsioonide k\u00e4igus;\n<li class=\"l\"> Lisatud on k\u00e4sk \"\n<li class=\"l\"> Lisatud k\u00e4sk \u00ab<noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/12\/tableam.html\">\" uute tabeli salvestusmeetodite t\u00f6\u00f6tlemiseks, mis on optimeeritud erinevate spetsiifiliste \u00fclesannete jaoks. Praegu on ainus sisseehitatud juurdep\u00e4\u00e4sumeetod tabelitele \"heap\";<\/a><\/noindex>\u00bb uute tabelite salvestamismeetodite t\u00f6\u00f6tlejate \u00fchendamiseks, mis on optimeeritud erinevate spetsiifiliste \u00fclesannete jaoks. Praegu on ainus sisseehitatud meetod tabelitesse p\u00e4\u00e4semiseks \u00abheap\u00bb;\n<li class=\"l\"> Konfiguratsioonifail recovery.conf on \u00fchendatud postgresql.conf-iga. Vigu taastamisre\u017eiimi, kui see juhtub, n\u00e4itab n\u00fc\u00fcd <noindex><a rel=\"nofollow\" href=\"https:\/\/www.postgresql.org\/docs\/12\/runtime-config-wal.html#RUNTIME-CONFIG-WAL-ARCHIVE-RECOVERY\">tuleks<\/a><\/noindex> failide recovery.signal ja standby.signal kasutamine.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Allikas: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51604\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0433\u043e\u0434\u0430 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430 \u043d\u043e\u0432\u0430\u044f \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u0430\u044f \u0432\u0435\u0442\u043a\u0430 \u0421\u0423\u0411\u0414 PostgreSQL 12. \u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0442\u043a\u0438 \u0431\u0443\u0434\u0443\u0442 \u0432\u044b\u0445\u043e\u0434\u0438\u0442\u044c \u0432 \u0442\u0435\u0447\u0435\u043d\u0438\u0435 \u043f\u044f\u0442\u0438 \u043b\u0435\u0442 \u0434\u043e \u043d\u043e\u044f\u0431\u0440\u044f 2024 \u0433\u043e\u0434\u0430. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u043d\u043e\u0432\u0448\u0435\u0441\u0442\u0432\u0430: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 &#171;\u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0443\u0435\u043c\u044b\u0445 \u0441\u0442\u043e\u043b\u0431\u0446\u043e\u0432&#171;, \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u044f, \u043e\u0445\u0432\u0430\u0442\u044b\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f \u0434\u0440\u0443\u0433\u0438\u0445 \u0441\u0442\u043e\u043b\u0431\u0446\u043e\u0432 \u0432 \u0442\u043e\u0439 \u0436\u0435 \u0442\u0430\u0431\u043b\u0438\u0446\u0435 (\u0430\u043d\u0430\u043b\u043e\u0433 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u0438\u0439, \u043d\u043e \u0434\u043b\u044f \u043e\u0442\u0434\u0435\u043b\u044c\u043d\u044b\u0445 \u0441\u0442\u043e\u043b\u0431\u0446\u043e\u0432). \u0413\u0435\u043d\u0435\u0440\u0438\u0440\u0443\u0435\u043c\u044b\u0435 \u0441\u0442\u043e\u043b\u0431\u0446\u044b \u043c\u043e\u0433\u0443\u0442 \u0431\u044b\u0442\u044c \u0434\u0432\u0443\u0445 [&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-38636","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=\"\u041f\u043e\u0441\u043b\u0435 \u0433\u043e\u0434\u0430 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u0430 \u043d\u043e\u0432\u0430\u044f \u0441\u0442\u0430\u0431\u0438\u043b\u044c\u043d\u0430\u044f \u0432\u0435\u0442\u043a\u0430 \u0421\u0423\u0411\u0414 PostgreSQL 12. \u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u043d\u043e\u0432\u043e\u0439 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PostgreSQL 12. \u041e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0442\u043a\u0438 \u0431\u0443\u0434\u0443\u0442 \u0432\u044b\u0445\u043e\u0434\u0438\u0442\u044c \u0432 \u0442\u0435\u0447\u0435\u043d\u0438\u0435 \u043f\u044f\u0442\u0438 \u043b\u0435\u0442 \u0434\u043e \u043d\u043e\u044f\u0431\u0440\u044f 2024 \u0433\u043e\u0434\u0430. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u043d\u043e\u0432\u0448\u0435\u0441\u0442\u0432\u0430: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 &quot;\u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0443\u0435\u043c\u044b\u0445 \u0441\u0442\u043e\u043b\u0431\u0446\u043e\u0432&quot;, \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u0435 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0432\u044b\u0447\u0438\u0441\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0430 \u043e\u0441\u043d\u043e\u0432\u0435 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Uuendused uue haru jaoks ilmuvad j\u00e4rgmise viie aasta jooksul kuni novembrini 2024. Peamised uuendused: toetuse lisamine \"genereeritud veergudele\", mille v\u00e4\u00e4rtus arvutatakse v\u00e4ljendi p\u00f5hjal, mis katab teiste veergude v\u00e4\u00e4rtused samas tabelis (sarnane vaadetele, kuid eraldi veergude jaoks). 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