{"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\/ro\/blog\/news\/vypusk-subd-firebird-5-0","title":{"rendered":"Lansarea SGBD-ului Firebird 5.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Dup\u0103 doi ani \u0219i jum\u0103tate de dezvoltare, a fost lansat\u0103 versiunea 5.0 a SGBD-ului rela\u021bional Firebird. Firebird continu\u0103 dezvoltarea codului SGBD-ului InterBase 6.0, deschis \u00een anul 2000 de compania Borland. Firebird este distribuit sub licen\u021ba liber\u0103 MPL \u0219i suport\u0103 standardele ANSI SQL, inclusiv func\u021bionalit\u0103\u021bi precum trigger-e, proceduri stocate \u0219i replicare. Versiuni binare sunt disponibile pentru Linux, Windows, macOS \u0219i Android.    <\/p>\n<p>Nout\u0103\u021bi cheie:  <\/p>\n<ul>\n<li class=\"l\"> A fost implementat\u0103 posibilitatea de a efectua opera\u021bii \u00een mod multi-thread. Paraleizarea \u00een mai multe fire este aplicabil\u0103 la crearea de indici, cur\u0103\u021barea memoriei (opera\u021bii automate \u0219i manuale de sweep), crearea de backup-uri \u0219i restaurarea din acestea.       gfix -sweep -parallel 4  dbname      gbak -b -par 4 -user username -pass password dbname backupname\n<li class=\"l\"> A fost ad\u0103ugat\u0103 suportul pentru indici par\u021biali, care includ doar \u00eenregistr\u0103rile selectate, care \u00eendeplinesc condi\u021biile specificate la crearea indexului.       CREATE INDEX IT1_COL ON T1 (COL) WHERE COL &lt; 100;\n<li class=\"l\"> \u00cen expresiile SELECT WITH LOCK, UPDATE \u0219i DELETE a fost implementat sintaxa \u201eSKIP LOCKED\u201d, permi\u021b\u00e2nd excluderea \u00eenregistr\u0103rilor pentru care, \u00een momentul trimiterii cererii, este setat\u0103 o blocare (de exemplu, pentru a nu a\u0219tepta eliberarea bloc\u0103rii \u00een cazul unei intersec\u021bii cu o alt\u0103 tranzac\u021bie).\n<li class=\"l\"> A fost ad\u0103ugat\u0103 posibilitatea de a actualiza baza de date la versiunea intermediar\u0103 actualizat\u0103 a stoc\u0103rii (ODS \u2014 On-Disk-Structure) \u00een timp real (inline update) f\u0103r\u0103 a crea \u0219i a restaura dintr-o copie de rezerv\u0103. De exemplu, acum este posibil s\u0103 se transforme \u00een timp real o baz\u0103 de date \u00een format Firebird 4.0 (ODS 13.0) \u00een format Firebird 5.0 (ODS 13.1).\n<li class=\"l\"> A fost implementat un cache pentru expresiile SQL compilate, gestionat automat (\u00eenregistr\u0103rile \u00eenvechite sunt eliminate pe m\u0103sur\u0103 ce este necesar). Dimensiunea cache-ului este setat\u0103 prin parametrul MaxStatementCacheSize din firebird.conf.\n<li class=\"l\"> A fost ad\u0103gat o interfa\u021b\u0103 pentru profilarea SQL \u0219i PSQL, care permite evaluarea timpului de execu\u021bie a fiec\u0103rei cereri, acumul\u00e2nd statistici despre num\u0103rul de cereri \u0219i identific\u00e2nd problemele de performan\u021b\u0103.\n<li class=\"l\"> \u00cen expresia MERGE a fost ad\u0103ugat\u0103 suportul pentru blocul condi\u021bional \u201eWHEN NOT MATCHED BY SOURCE\u201d, care se activeaz\u0103 c\u00e2nd \u00eenregistrarea de origine nu se potrive\u0219te cu nici o \u00eenregistrare din setul \u021bint\u0103.       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\"> A fost asigurat\u0103 posibilitatea de a returna mai multe r\u00e2nduri prin expresia RETURNING, dac\u0103 DML-ul specificat acoper\u0103 mai multe r\u00e2nduri (anterior, \u00een astfel de situa\u021bii, era generat\u0103 o eroare \u201emultiple rows in singleton select\u201d).\n<li class=\"l\"> Func\u021bii noi \u00eencorporate: UNICODE_CHAR pentru returnarea simbolului unicode corespunz\u0103tor unui cod dat \u0219i UNICODE_VAL pentru returnarea codului pentru un simbol dat. Func\u021biile EXTRACT, FIRST_DAY \u0219i LAST_DAY au fost actualizate cu parametrul QUARTER pentru a determina num\u0103rul trimestrului.\n<li class=\"l\"> A fost ad\u0103ugat un nou pachet de sistem RDB$BLOB_UTIL cu o colec\u021bie de opera\u021biuni cu BLOB-uri pentru modulele PSQL.\n<li class=\"l\"> Algoritmul de comprimare a \u00eenregistr\u0103rilor a fost \u00eembun\u0103t\u0103\u021bit, aplic\u00e2nd acum un contor de lungime variabil\u0103 pentru o ambalare mai eficient\u0103 a secven\u021belor de date repetitive. Optimizarea a permis cre\u0219terea semnificativ\u0103 a ratei de comprimare pentru c\u00e2mpurile VARCHAR lungi, care nu sunt complet umplute, cu date \u00een codificarea UTF-8.\n<li class=\"l\"> A fost ad\u0103ugat\u0103 posibilitatea de a lucra cu cursorii bidirec\u021bionali (scrollable) \u00een timpul acces\u0103rii de la distan\u021b\u0103 a bazei de date.\n<li class=\"l\"> A fost optimizat\u0103 performan\u021ba copierii BLOB-urilor.\n<li class=\"l\"> A fost ad\u0103ugat suport complet pentru sintaxa de definire a r\u00e2ndurilor, descris\u0103 \u00een standardul SQL. De exemplu, r\u00e2ndurile pot fi acum \u00eentrerupte de comentarii sau spa\u021bii:       select 'ab' \/* comment *\/ 'cd' from RDB$DATABASE;     select 'ab' 'cd' from RDB$DATABASE;    <\/ul>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=60430\">opennet.ro<\/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 5.0.2.1 - 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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