{"id":82740,"date":"2020-05-24T19:42:08","date_gmt":"2020-05-24T17:42:08","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-subd-sqlite-3-32-proekt-duckdb-razvivaet-variant-sqlite-dlya-analiticheskih-zaprosov"},"modified":"2020-05-24T19:42:08","modified_gmt":"2020-05-24T17:42:08","slug":"reliz-subd-sqlite-3-32-proekt-duckdb-razvivaet-variant-sqlite-dlya-analiticheskih-zaprosov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hr\/blog\/news\/reliz-subd-sqlite-3-32-proekt-duckdb-razvivaet-variant-sqlite-dlya-analiticheskih-zaprosov","title":{"rendered":"Izlazak SQLite 3.32. projekt DuckDB razvija varijantu SQLite za analiti\u010dke upite","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/changes.html\">Objavljeno<\/a><\/noindex> izdanje <noindex><a rel=\"nofollow\" href=\"http:\/\/sqlite.org\/\">SQLite 3.32.0<\/a><\/noindex>, lagani DBMS predstavljen kao dinami\u010dka biblioteka. Kod SQLite je dostupan kao javna domena (public domain), tj. mo\u017ee se koristiti bez ograni\u010denja i besplatno u bilo koje svrhe. Financijsku podr\u0161ku programerima SQLite pru\u017ea posebno formirani konzorcij koji uklju\u010duje tvrtke poput Adobe, Oracle, Mozilla, Bentley i Bloomberg. <\/p>\n<p>Glavne <noindex><a rel=\"nofollow\" href=\"https:\/\/sqlite.org\/releaselog\/3_32_0.html\">promjene<\/a><\/noindex>:<\/p>\n<ul>\n<li class=\"l\"> Implementiran <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/lang_analyze.html#approx\">aproksimativna<\/a><\/noindex> varijanta naredbe ANALYZE koja omogu\u0107ava djelomi\u010dno prikupljanje statistike u vrlo velikim BDB-ovima, bez potpunog skeniranja indeksa. Ograni\u010denje broja zapisa prilikom skeniranja jednog indeksa postavlja se pomo\u0107u nove direktive &#171;<noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/pragma.html#pragma_analysis_limit\">PRAGMA analysis_limit<\/a><\/noindex>&#171;.\n<li class=\"l\"> Dodana je nova virtualna tablica &#171;<noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/bytecodevtab.html\">bytecode<\/a><\/noindex>&#171;, u kojoj je predlo\u017eena informacija o <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/opcode.html\">bajt kodu<\/a><\/noindex> pripremljenih izraza (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/c3ref\/stmt.html\">prepared statement<\/a><\/noindex>).\n<li class=\"l\"> Dodana VFS sloj <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/cksumvfs.html\">checksum<\/a><\/noindex>, koja dodaje 8-bajtne kontrolne zbrojeve na kraj svake stranice podataka u bazi podataka i provjerava ih pri svakom \u010ditanju iz baze podataka. Sloj omogu\u0107ava otkrivanje o\u0161te\u0107enja baze podataka uslijed slu\u010dajnog iskrivljenja bitova na ure\u0111ajima za pohranu.\n<li class=\"l\"> Dodana nova SQL funkcija <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/lang_corefunc.html#iif\">iif(X,Y,Z)<\/a><\/noindex>, koja vra\u0107a vrijednost Y ako je izraz X istinit, ili Z u suprotnom.\n<li class=\"l\"> U izrazima INSERT i UPDATE sada uvijek <noindex><a rel=\"nofollow\" href=\"https:\/\/sqlite.org\/src\/info\/86ba67afafded936\">se koristi<\/a><\/noindex> ve\u017ee tipove stupaca (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/datatype3.html#affinity\">column affinity<\/a><\/noindex>) prije izra\u010dunavanja uvjeta u bloku <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/lang_createtable.html#ckconst\">CHECK<\/a><\/noindex>.\n<li class=\"l\"> Ograni\u010denje na broj parametara pove\u0107ano je sa 999 na 32766.\n<li class=\"l\"> Dodano pro\u0161irenje <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/uintcseq.html\">UINT kolacijska sekvenca<\/a><\/noindex> s implementacijom sortiranja sekvenci koja uzima u obzir cijele brojeve u tekstu za sortiranje tog teksta u numeri\u010dkom redu.\n<li class=\"l\"> U su\u010delju naredbenog retka u naredbu &#171;.import&#187; dodane su opcije &#171;&#8212;csv&#187;, &#171;&#8212;ascii&#187; i &#171;&#8212;skip&#187;. U naredbi &#171;.dump&#187; dopu\u0161teno je kori\u0161tenje vi\u0161e LIKE uzoraka s spajanjem na izlazu svih tablica koje odgovaraju zadanom obrascu. Dodana je naredba &#171;.oom&#187; za debuggerske izgradnje. U naredbe &#171;.excel&#187;, &#171;.output&#187; i &#171;.once&#187; dodana je opcija &#171;&#8212;bom&#187;. U naredbu &#171;.filectrl&#187; dodana je opcija &#171;&#8212;schema&#187;.\n<li class=\"l\"> Odre\u0111ena s operatorom LIKE izraz ESCAPE sada redefinira zamjenske znakove, \u0161to odgovara pona\u0161anju PostgreSQL.\n<\/ul>\n<p>Dodatno se mo\u017ee primijetiti razvoj nove DBMS <noindex><a rel=\"nofollow\" href=\"https:\/\/www.duckdb.org\/\">DuckDB<\/a><\/noindex>, u kojoj se razvija varijanta SQLite optimizirana za izvo\u0111enje <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/OLAP\">analiti\u010dkih upita<\/a><\/noindex>.<br \/>\nOsim koda ljuske iz SQLite, projekt koristi izdvojenu biblioteku parser iz PostgreSQL, komponentu Date Math iz <noindex><a rel=\"nofollow\" href=\"https:\/\/www.monetdb.org\/\">MonetDB<\/a><\/noindex>, vlastitu implementaciju prozorskih funkcija (na bazi algoritma Segment Tree Aggregation), vektorizirani izvr\u0161ni motor upita (na bazi algoritma Hyper-Pipelining Query Execution), obrtnik regularnih izraza temeljen na biblioteci <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=25765\">RE2<\/a><\/noindex>, vlastiti optimizator upita i MVCC mehanizam za upravljanje istovremenim izvr\u0161enjem zadataka (Multi-Version Concurrency Control).<br \/>\nKod projekta <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/cwida\/duckdb\">distribuira se<\/a><\/noindex> pod MIT licencom. Razvoj je jo\u0161 u fazi <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/cwida\/duckdb\/releases\">formiranja<\/a><\/noindex> eksperimentalnih izdanja.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Izvor: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=53018\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 SQLite 3.32.0, \u043b\u0435\u0433\u043a\u043e\u0432\u0435\u0441\u043d\u043e\u0439 \u0421\u0423\u0411\u0414, \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u043e\u0439 \u0432 \u0432\u0438\u0434\u0435 \u043f\u043e\u0434\u043a\u043b\u044e\u0447\u0430\u0435\u043c\u043e\u0439 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438. \u041a\u043e\u0434 SQLite \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043a\u0430\u043a \u043e\u0431\u0449\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u043e\u0435 \u0434\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u0435 (public domain), \u0442.\u0435. \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0431\u0435\u0437 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u0438\u0439 \u0438 \u0431\u0435\u0437\u0432\u043e\u0437\u043c\u0435\u0437\u0434\u043d\u043e \u0432 \u043b\u044e\u0431\u044b\u0445 \u0446\u0435\u043b\u044f\u0445. \u0424\u0438\u043d\u0430\u043d\u0441\u043e\u0432\u0443\u044e \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u043e\u0432 SQLite \u043e\u0441\u0443\u0449\u0435\u0441\u0442\u0432\u043b\u044f\u0435\u0442 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u0441\u043e\u0437\u0434\u0430\u043d\u043d\u044b\u0439 \u043a\u043e\u043d\u0441\u043e\u0440\u0446\u0438\u0443\u043c, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0432\u0445\u043e\u0434\u044f\u0442 \u0442\u0430\u043a\u0438\u0435 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438, \u043a\u0430\u043a Adobe, Oracle, Mozilla, Bentley \u0438 Bloomberg. \u041e\u0441\u043d\u043e\u0432\u043d\u044b\u0435 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f: \u0420\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u043d \u0430\u043f\u043f\u0440\u043e\u043a\u0441\u0438\u043c\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0432\u0430\u0440\u0438\u0430\u043d\u0442 \u043a\u043e\u043c\u0430\u043d\u0434\u044b [&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-82740","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - 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