{"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\/cs\/blog\/news\/reliz-postgresql-12","title":{"rendered":"Vyd\u00e1n\u00ed PostgreSQL 12","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Skupina v\u00fdvoj\u00e1\u0159\u016f PostgreSQL ozn\u00e1mila vyd\u00e1n\u00ed PostgreSQL 12, nejnov\u011bj\u0161\u00ed verze syst\u00e9mu pro spr\u00e1vu rela\u010dn\u00edch datab\u00e1z\u00ed s otev\u0159en\u00fdm zdrojov\u00fdm k\u00f3dem.<br \/>\nV PostgreSQL 12 do\u0161lo k v\u00fdrazn\u00e9mu zlep\u0161en\u00ed v\u00fdkonu dotaz\u016f \u2013 zejm\u00e9na to plat\u00ed pro pr\u00e1ci s velk\u00fdmi objemy dat, byla tak\u00e9 optimalizov\u00e1na celkov\u00e1 vyu\u017eitelnost diskov\u00e9ho prostoru.<\/p>\n<p>Mezi nov\u00fdmi funkcemi:<\/p>\n<ul>\n<li>implementace jazyka dotaz\u016f JSON Path (d\u016fle\u017eit\u00e1 sou\u010d\u00e1st standardu SQL\/JSON);<\/li>\n<li>optimalizace vykon\u00e1v\u00e1n\u00ed spole\u010dn\u00fdch tabulkov\u00fdch v\u00fdraz\u016f (WITH);<\/li>\n<li>podpora generovan\u00fdch sloupc\u016f<\/li>\n<\/ul>\n<p>Komunita tak\u00e9 pokra\u010duje v pr\u00e1ci na roz\u0161i\u0159itelnosti a spolehlivosti PostgreSQL, rozv\u00edj\u00ed podporu internacionalizace, mo\u017enost\u00ed autentizace a nab\u00edz\u00ed jednodu\u0161\u0161\u00ed cesty k administraci syst\u00e9mu.<\/p>\n<p>Tento release obsahuje implementaci rozhran\u00ed pro p\u0159ipojiteln\u00e9 \u00falo\u017en\u00e9 motory, co\u017e nyn\u00ed v\u00fdvoj\u00e1\u0159\u016fm umo\u017e\u0148uje vytv\u00e1\u0159et vlastn\u00ed metody ukl\u00e1d\u00e1n\u00ed dat.<\/p>\n<p><strong>Vylep\u0161en\u00ed v\u00fdkonu<\/strong><\/p>\n<p>PostgreSQL 12 zahrnuje z\u00e1sadn\u00ed zlep\u0161en\u00ed v\u00fdkonu a \u00fadr\u017eby pro indexovac\u00ed a sekven\u010dn\u00ed syst\u00e9my.<\/p>\n<p>Indexy B-tree \u2014 standardn\u00ed typ indexov\u00e1n\u00ed v PostgreSQL, byly optimalizov\u00e1ny ve verzi 12 pro z\u00e1t\u011b\u017ee, kter\u00e9 zahrnuj\u00ed \u010dast\u00e9 modifikace index\u016f. Pou\u017eit\u00ed referen\u010dn\u00edho testu TPC-C pro PostgreSQL 12 uk\u00e1zalo sn\u00ed\u017een\u00ed vyu\u017eit\u00ed prostoru v pr\u016fm\u011bru o 40 % a celkov\u00fd n\u00e1r\u016fst v\u00fdkonu dotaz\u016f.<\/p>\n<p>Dotazy na sekciovan\u00e9 tabulky z\u00edskaly v\u00fdrazn\u00e1 zlep\u0161en\u00ed, zejm\u00e9na pro tabulky skl\u00e1daj\u00edc\u00ed se z tis\u00edc\u016f sekc\u00ed, kter\u00e9 p\u0159edpokl\u00e1daj\u00ed pr\u00e1ci pouze s omezen\u00fdmi \u010d\u00e1stmi datov\u00fdch pol\u00ed. Byla zlep\u0161ena v\u00fdkonnost p\u0159id\u00e1v\u00e1n\u00ed dat do sekciovan\u00fdch tabulek pomoc\u00ed INSERT a COPY, stejn\u011b jako mo\u017enost p\u0159ipojen\u00ed nov\u00e9 sekce bez blokov\u00e1n\u00ed vykon\u00e1van\u00fdch dotaz\u016f.<\/p>\n<p>V PostgreSQL 12 byly provedeny dal\u0161\u00ed vylep\u0161en\u00ed v indexov\u00e1n\u00ed, kter\u00e1 ovliv\u0148uj\u00ed celkovou v\u00fdkonnost, v\u010detn\u011b:<\/p>\n<ul>\n<li>sn\u00ed\u017een\u00ed re\u017eijn\u00edch n\u00e1klad\u016f p\u0159i generov\u00e1n\u00ed WAL pro typy index\u016f GiST, GIN a SP-GiST;<\/li>\n<li>mo\u017enost vytv\u00e1\u0159et takzvan\u00e9 pokr\u00fdvaj\u00edc\u00ed indexy (covering indexes, nab\u00eddka INCLUDE) na GiST indexy;<\/li>\n<li>mo\u017enost prov\u00e1d\u011bt dotazy \u201enejbli\u017e\u0161\u00edch soused\u016f\u201c (k-NN search) pomoc\u00ed operatoru vzd\u00e1lenosti () a vyu\u017eit\u00ed index\u016f SP-GiST;<\/li>\n<li>podporu sb\u011bru statistik nejb\u011b\u017en\u011bj\u0161\u00edch hodnot (most-common value, MCV) pomoc\u00ed CREATE STATISTICS, co\u017e pom\u00e1h\u00e1 z\u00edsk\u00e1vat lep\u0161\u00ed pl\u00e1ny vykon\u00e1n\u00ed dotaz\u016f p\u0159i pou\u017eit\u00ed sloupc\u016f, jejich\u017e hodnoty jsou nerovnom\u011brn\u011b rozlo\u017eeny.<\/li>\n<\/ul>\n<p>JIT kompilace s vyu\u017eit\u00edm LLVM, kter\u00e1 se objevila v PostgreSQL 11, je nyn\u00ed zapnuta ve v\u00fdchoz\u00edm nastaven\u00ed. JIT kompilace umo\u017e\u0148uje zvy\u0161ovat v\u00fdkon p\u0159i pr\u00e1ci s v\u00fdrazy ve WHERE, c\u00edlov\u00fdch seznamech, agreg\u00e1tech a n\u011bkter\u00fdch intern\u00edch operac\u00edch. Je dostupn\u00e1, pokud jste zkompilovali PostgreSQL s LLVM nebo pou\u017e\u00edv\u00e1te bal\u00ed\u010dek PostgreSQL, kter\u00fd byl vytvo\u0159en s povolen\u00fdm LLVM.<\/p>\n<p><strong>Vylep\u0161en\u00ed schopnost\u00ed jazyka SQL a kompatibility se standardem.<\/strong><\/p>\n<p>V PostgreSQL 12 byla p\u0159id\u00e1na mo\u017enost prov\u00e1d\u011bt dotazy na JSON dokumenty pomoc\u00ed JSON path v\u00fdraz\u016f definovan\u00fdch ve standardu SQL\/JSON. Tyto dotazy mohou vyu\u017e\u00edvat st\u00e1vaj\u00edc\u00ed indexa\u010dn\u00ed mechanismy pro dokumenty ulo\u017een\u00e9 ve form\u00e1tu JSONB pro efektivn\u00ed extrakci dat.<\/p>\n<p>Spole\u010dn\u00e9 tabulkov\u00e9 v\u00fdrazy, tak\u00e9 zn\u00e1m\u00e9 jako dotazy s WITH, mohou v PostgreSQL 12 nyn\u00ed b\u00fdt automaticky vykon\u00e1v\u00e1ny s pou\u017eit\u00edm substituce, co\u017e m\u016f\u017ee pomoci zv\u00fd\u0161it v\u00fdkon mnoha existuj\u00edc\u00edch dotaz\u016f. V nov\u00e9 verzi m\u016f\u017ee b\u00fdt \u010d\u00e1st dotazu WITH vykon\u00e1na se substituc\u00ed, pouze pokud nen\u00ed rekurzivn\u00ed, nem\u00e1 vedlej\u0161\u00ed \u00fa\u010dinky a je na ni odkazov\u00e1no pouze jednou v n\u00e1sleduj\u00edc\u00ed \u010d\u00e1sti dotazu.<\/p>\n<p>V PostgreSQL 12 se objevuje podpora \u201egenerovan\u00fdch sloupc\u016f\u201c. Tento typ sloupce, popsan\u00fd ve standardu SQL, vypo\u010d\u00edt\u00e1v\u00e1 hodnotu na z\u00e1klad\u011b obsahu dal\u0161\u00edch sloupc\u016f ve stejn\u00e9 tabulce. V t\u00e9to verzi PostgreSQL podporuje \u201eulo\u017een\u00e9 generovan\u00e9 sloupce\u201c, kde se vypo\u010d\u00edtan\u00e1 hodnota ukl\u00e1d\u00e1 na disk.<\/p>\n<p><strong>Mezin\u00e1rodn\u00ed standardizace<\/strong><\/p>\n<p>PostgreSQL 12 roz\u0161i\u0159uje podporu ICU porovn\u00e1n\u00ed, co\u017e umo\u017e\u0148uje u\u017eivatel\u016fm definovat \u201enedefinovan\u00e1 porovn\u00e1n\u00ed\u201c, kter\u00e1 mohou nap\u0159\u00edklad povolit srovn\u00e1n\u00ed bez ohledu na velikost p\u00edsmen nebo diakritiku.<\/p>\n<p><strong>Autentizace<\/strong><\/p>\n<p>PostgreSQL roz\u0161i\u0159uje svou podporu spolehliv\u00fdch metod autentizace prost\u0159ednictv\u00edm n\u011bkolika vylep\u0161en\u00ed, kter\u00e1 zaji\u0161\u0165uj\u00ed dodate\u010dnou bezpe\u010dnost a funk\u010dnost. V tomto vyd\u00e1n\u00ed je p\u0159edstaveno \u0161ifrov\u00e1n\u00ed na stran\u011b klienta a serveru pro autentizaci p\u0159es rozhran\u00ed GSSAPI, jako\u017e i schopnost PostgreSQL zji\u0161\u0165ovat. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/server\/\"   title=\"servery\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"1845\">servery<\/a> LDAP, pokud byl PostgreSQL zkompilov\u00e1n s OpenLDAP.<\/p>\n<p>Krom\u011b toho PostgreSQL 12 nyn\u00ed podporuje variantu v\u00edcefaktorov\u00e9 autentizace. Nyn\u00ed m\u016f\u017ee server PostgreSQL po\u017eadovat, aby klient poskytl platn\u00fd <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/cs\/ssl-sertifikat\/\"   title=\"SSL\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"2262\">SSL<\/a>-certifik\u00e1t s odpov\u00eddaj\u00edc\u00edm u\u017eivatelsk\u00fdm jm\u00e9nem pomoc\u00ed clientcert=verify-full a kombinoval to s jednotliv\u00fdm po\u017eadavkem na autentiza\u010dn\u00ed metodu (nap\u0159. scram-sha-256).<\/p>\n<p><strong>Administrace<\/strong><\/p>\n<p>V PostgreSQL 12 byla p\u0159id\u00e1na mo\u017enost prov\u00e1d\u011bt neblokuj\u00edc\u00ed rekonstrukci index\u016f pomoc\u00ed p\u0159\u00edkazu REINDEX CONCURRENTLY. To u\u017eivatel\u016fm umo\u017e\u0148uje vyhnout se prostoj\u016fm v pr\u00e1ci DBMS p\u0159i dlouhotrvaj\u00edc\u00ed rekonstrukci index\u016f.<\/p>\n<p>Krom\u011b toho v PostgreSQL 12 m\u016f\u017eete zapnout nebo vypnout kontroln\u00ed sou\u010dty str\u00e1nek v clusterech, kter\u00e9 jsou vypnut\u00e9, pomoc\u00ed p\u0159\u00edkazu pg_checksums. D\u0159\u00edve bylo mo\u017en\u00e9 zapnout kontroln\u00ed sou\u010dty str\u00e1nek \u2014 funkce, kter\u00e1 pom\u00e1h\u00e1 ov\u011b\u0159it integritu dat ulo\u017een\u00fdch na disku \u2014 pouze v okam\u017eiku inicializace clusteru PostgreSQL pomoc\u00ed initdb.<\/p>\n<p>Zdroj: <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-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - 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.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/cs\/blog\/news\/reliz-postgresql-12\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u0420\u0435\u043b\u0438\u0437 PostgreSQL 12 | ProHoster\" \/>\n\t\t<meta property=\"og: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.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/cs\/blog\/news\/reliz-postgresql-12\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2019-10-31T19:25:05+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2019-10-31T19:25:05+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Vyd\u00e1n\u00ed PostgreSQL 12 | ProHoster","description":"Skupina v\u00fdvoj\u00e1\u0159\u016f PostgreSQL ozn\u00e1mila vyd\u00e1n\u00ed PostgreSQL 12, nejnov\u011bj\u0161\u00ed verze rela\u010dn\u00edho syst\u00e9mu pro spr\u00e1vu datab\u00e1z\u00ed s otev\u0159en\u00fdm zdrojov\u00fdm k\u00f3dem. 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