{"id":112886,"date":"2024-01-13T11:28:03","date_gmt":"2024-01-13T09:28:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-subd-firebird-5-0"},"modified":"2024-01-13T11:28:03","modified_gmt":"2024-01-13T09:28:03","slug":"vypusk-subd-firebird-5-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/vypusk-subd-firebird-5-0","title":{"rendered":"Vyd\u00e1n\u00ed datab\u00e1zov\u00e9ho syst\u00e9mu Firebird 5.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Po dvou a p\u016fl letech v\u00fdvoje byl uveden na trh rela\u010dn\u00ed SGBD Firebird 5.0. Firebird pokra\u010duje ve v\u00fdvoji k\u00f3du SGBD InterBase 6.0, kter\u00fd byl otev\u0159en v roce 2000 firmou Borland. Firebird je distribuov\u00e1n pod svobodnou licenc\u00ed MPL a podporuje standardy ANSI SQL, v\u010detn\u011b funkc\u00ed jako jsou spou\u0161t\u011b\u010de, ulo\u017een\u00e9 procedury a replikace. Bin\u00e1rn\u00ed verze jsou p\u0159ipraveny pro Linux, Windows, macOS a Android.    <\/p>\n<p>Hlavn\u00ed novinky:  <\/p>\n<ul>\n<li class=\"l\"> Byla implementov\u00e1na mo\u017enost prov\u00e1d\u011bt operace v multithreadov\u00e9m re\u017eimu. Paralelizace v n\u011bkolika vl\u00e1knech je pou\u017eiteln\u00e1 p\u0159i vytv\u00e1\u0159en\u00ed index\u016f, sb\u00edran\u00ed odpadk\u016f (automatick\u00e9 i ru\u010dn\u00ed akce sweep), vytv\u00e1\u0159en\u00ed z\u00e1loh a obnoven\u00ed z nich.       gfix -sweep -parallel 4  dbname      gbak -b -par 4 -user username -pass password dbname backupname\n<li class=\"l\"> Byla p\u0159id\u00e1na podpora \u010d\u00e1ste\u010dn\u00fdch index\u016f, kter\u00e9 zahrnuj\u00ed pouze vybran\u00e9 z\u00e1znamy odpov\u00eddaj\u00edc\u00ed podm\u00ednk\u00e1m uveden\u00fdm p\u0159i jejich vytv\u00e1\u0159en\u00ed.       CREATE INDEX IT1_COL ON T1 (COL) WHERE COL &lt; 100;\n<li class=\"l\"> Ve v\u00fdrazech SELECT WITH LOCK, UPDATE a DELETE byl implementov\u00e1n syntaktick\u00fd prvek \u201eSKIP LOCKED\u201c, kter\u00fd umo\u017e\u0148uje vylou\u010dit z\u00e1znamy, na kter\u00e9 je v okam\u017eiku odesl\u00e1n\u00ed dotazu zavedena blokace (nap\u0159\u00edklad aby nebylo nutn\u00e9 \u010dekat na uvoln\u011bn\u00ed blokace p\u0159i p\u0159ekr\u00fdv\u00e1n\u00ed s jinou transakc\u00ed).\n<li class=\"l\"> Byla p\u0159id\u00e1na mo\u017enost aktualizace datab\u00e1ze na aktu\u00e1ln\u00ed meziversion struktury \u00falo\u017ei\u0161t\u011b (ODS \u2014 On-Disk-Structure) za b\u011bhu (inline update) bez vytv\u00e1\u0159en\u00ed a obnovy z z\u00e1lohy. Nap\u0159\u00edklad nyn\u00ed lze za b\u011bhu p\u0159ev\u00e9st datab\u00e1zi ve form\u00e1tu Firebird 4.0 (ODS 13.0) na form\u00e1t Firebird 5.0 (ODS 13.1).\n<li class=\"l\"> Byl zaveden cache zkompilovan\u00fdch SQL v\u00fdraz\u016f, kter\u00fd je automaticky spravov\u00e1n (neplatn\u00e9 z\u00e1znamy jsou \u010di\u0161t\u011bn\u00ed podle pot\u0159eby). Velikost cache je nastavena pomoc\u00ed parametru MaxStatementCacheSize v souboru firebird.conf.\n<li class=\"l\"> Bylo p\u0159id\u00e1no rozhran\u00ed pro profilov\u00e1n\u00ed SQL a PSQL, kter\u00e9 umo\u017e\u0148uje odhadovat dobu prov\u00e1d\u011bn\u00ed ka\u017ed\u00e9ho dotazu, shroma\u017e\u010fovat statistiku o po\u010dtu dotaz\u016f a odhalovat probl\u00e9my s v\u00fdkonnost\u00ed.\n<li class=\"l\"> Do v\u00fdrazu MERGE byla p\u0159id\u00e1na podpora podm\u00ednkov\u00e9ho bloku \u201eWHEN NOT MATCHED BY SOURCE\u201c, kter\u00fd se aktivuje, kdy\u017e p\u016fvodn\u00ed z\u00e1znam neodpov\u00edd\u00e1 \u017e\u00e1dn\u00e9mu z\u00e1znamu v c\u00edlov\u00e9 sad\u011b. MERGE INTO customers c USING new_customers nc ON (c.id = nc.id)  \tWHEN MATCHED THEN  \t\tUPDATE SET name = nc.name  \tWHEN NOT MATCHED BY SOURCE THEN  \t\tDELETE\n<li class=\"l\"> Byla zaji\u0161t\u011bna mo\u017enost vr\u00e1tit v\u00edce \u0159\u00e1dk\u016f pomoc\u00ed v\u00fdrazu RETURNING, pokud dan\u00fd DML v\u00fdraz pokr\u00fdv\u00e1 v\u00edce \u0159\u00e1dk\u016f (d\u0159\u00edve se v podobn\u00fdch situac\u00edch zobrazila chyba \u201emultiple rows in singleton select\u201c).\n<li class=\"l\"> Byly p\u0159id\u00e1ny nov\u00e9 vestav\u011bn\u00e9 funkce: UNICODE_CHAR pro vr\u00e1cen\u00ed unicode znaku odpov\u00eddaj\u00edc\u00edho zadan\u00e9mu k\u00f3du a UNICODE_VAL pro vr\u00e1cen\u00ed k\u00f3du pro zadan\u00fd znak. Do funkc\u00ed EXTRACT, FIRST_DAY a LAST_DAY byl p\u0159id\u00e1n parametr QUARTER pro ur\u010den\u00ed \u010d\u00edsla kvart\u00e1lu.\n<li class=\"l\"> Byl p\u0159id\u00e1n nov\u00fd syst\u00e9mov\u00fd bal\u00ed\u010dek RDB$BLOB_UTIL se sadou operac\u00ed s BLOB-y pro moduly PSQL.\n<li class=\"l\"> Byl vylep\u0161en algoritmus pro kompresi z\u00e1znam\u016f, kter\u00fd nyn\u00ed pou\u017e\u00edv\u00e1 po\u010d\u00edtadlo prom\u011bnn\u00e9 d\u00e9lky pro efektivn\u011bj\u0161\u00ed balen\u00ed opakuj\u00edc\u00edch se sekvenc\u00ed dat. Optimalizace umo\u017enila v\u00fdrazn\u011b zv\u00fd\u0161it m\u00edru komprese nedokonale vypln\u011bn\u00fdch dlouh\u00fdch pol\u00ed VARCHAR s daty v k\u00f3dov\u00e1n\u00ed UTF-8.\n<li class=\"l\"> Byla p\u0159id\u00e1na mo\u017enost pr\u00e1ce s obousm\u011brn\u00fdmi kurzory (scrollable) p\u0159i vzd\u00e1len\u00e9m s\u00ed\u0165ov\u00e9m p\u0159\u00edstupu k datab\u00e1zi.\n<li class=\"l\"> Byla provedena optimalizace v\u00fdkonu kop\u00edrov\u00e1n\u00ed blob\u016f.\n<li class=\"l\"> Byla p\u0159id\u00e1na kompletn\u00ed podpora syntaxe definice \u0159et\u011bzc\u016f, jak je pops\u00e1no ve standardu SQL. Nap\u0159\u00edklad \u0159et\u011bzce mohou nyn\u00ed b\u00fdt p\u0159eru\u0161ov\u00e1ny koment\u00e1\u0159i nebo mezerami: select 'ab' \/* comment *\/ 'cd' from RDB$DATABASE; select 'ab' 'cd' from RDB$DATABASE;    <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60430\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0441\u043b\u0435 \u0434\u0432\u0443\u0445 \u0441 \u043f\u043e\u043b\u043e\u0432\u0438\u043d\u043e\u0439 \u043b\u0435\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 \u0440\u0435\u043b\u044f\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0421\u0423\u0411\u0414 Firebird 5.0. Firebird \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u0442 \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u0435 \u043a\u043e\u0434\u0430 \u0421\u0423\u0411\u0414 InterBase 6.0, \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0433\u043e \u0432 2000 \u0433\u043e\u0434\u0443 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Borland. Firebird \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u0441\u0432\u043e\u0431\u043e\u0434\u043d\u043e\u0439 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 MPL \u0438 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u044b ANSI SQL, \u0432 \u0442\u043e\u043c \u0447\u0438\u0441\u043b\u0435 \u0442\u0430\u043a\u0438\u0435 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u0438, \u043a\u0430\u043a \u0442\u0440\u0438\u0433\u0433\u0435\u0440\u044b, \u0445\u0440\u0430\u043d\u0438\u043c\u044b\u0435 \u043f\u0440\u043e\u0446\u0435\u0434\u0443\u0440\u044b \u0438 \u0440\u0435\u043f\u043b\u0438\u043a\u0430\u0446\u0438\u044e. \u0411\u0438\u043d\u0430\u0440\u043d\u044b\u0435 \u0441\u0431\u043e\u0440\u043a\u0438 \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u044b \u0434\u043b\u044f Linux, Windows, macOS \u0438 [&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-112886","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=\"\u041f\u043e\u0441\u043b\u0435 \u0434\u0432\u0443\u0445 \u0441 \u043f\u043e\u043b\u043e\u0432\u0438\u043d\u043e\u0439 \u043b\u0435\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u043b\u0435\u043d \u0440\u0435\u043b\u0438\u0437 \u0440\u0435\u043b\u044f\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0421\u0423\u0411\u0414 Firebird 5.0. 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