{"id":55593,"date":"2020-01-24T00:00:00","date_gmt":"2020-01-23T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/reliz-subd-sqlite-3-31-s-podderzhkoj-generiruemyh-stolbtsov"},"modified":"2020-02-18T14:03:43","modified_gmt":"2020-02-18T11:03:43","slug":"reliz-subd-sqlite-3-31-s-podderzhkoj-generiruemyh-stolbtsov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/no\/blog\/news\/reliz-subd-sqlite-3-31-s-podderzhkoj-generiruemyh-stolbtsov","title":{"rendered":"Utgivelsen av SQLite 3.31 med st\u00f8tte for genererte kolonner","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/changes.html\">Published<\/a><\/noindex> versjon <noindex><a rel=\"nofollow\" href=\"http:\/\/sqlite.org\/\">SQLite 3.31.0<\/a><\/noindex>, en lettvekts DB, utformet som et tilleggsbibliotek. Koden til SQLite distribueres som offentlig eiendom, dvs. den kan brukes fritt og gratis til alle form\u00e5l. Utviklerne av SQLite f\u00e5r \u00f8konomisk st\u00f8tte fra et spesielt opprettet konsortium som inkluderer selskaper som Adobe, Oracle, Mozilla, Bentley og Bloomberg. <\/p>\n<p>Viktige <noindex><a rel=\"nofollow\" href=\"https:\/\/sqlite.org\/releaselog\/3_31_0.html\">endringer<\/a><\/noindex>:<\/p>\n<ul>\n<li class=\"l\"> St\u00f8tte lagt til <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/gencol.html\">genererte kolonner<\/a><\/noindex> (beregnede kolonner), som gj\u00f8r at man ved opprettelse av tabellen kan definere en kolonne, hvor verdien automatisk beregnes basert p\u00e5 innholdet i en annen kolonne. Genererte kolonner kan v\u00e6re b\u00e5de virtuelle (som genereres p\u00e5 stedet ved hvert kall) og lagret i databasen (som lagres ved oppdatering av relaterte kolonner). Innholdet i genererte kolonner er kun tilgjengelig i lesemodus (endrelse skjer kun ved modifikasjon av verdien i en annen kolonne som er involvert i beregningen). For eksempel:\n<p>   CREATE TABLE t1(<br \/>\n      a INTEGER PRIMARY KEY,<br \/>\n      b INT,<br \/>\n      c TEXT,<br \/>\n      d INT GENERATED ALWAYS AS (a*abs(b)) VIRTUAL,<br \/>\n      e TEXT GENERATED ALWAYS AS (substr(c,b,b+1)) STORED<br \/>\n   );<\/p>\n<li class=\"l\"> PRAGMA er lagt til <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/pragma.html#pragma_trusted_schema\">trusted_schema<\/a><\/noindex>, konfigurasjon <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/c3ref\/c_dbconfig_defensive.html#sqlitedbconfigtrustedschema\">SQLITE_DBCONFIG_TRUSTED_SCHEMA<\/a><\/noindex> og en samleoppgave &#171;-DSQLITE_TRUSTED_SCHEMA&#187;, som gj\u00f8r det mulig \u00e5 administrere aktiveringen av beskyttelse mot <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52084\">angrep<\/a><\/noindex> gjennom modifikasjon av datamodellen i databasen. N\u00e5r beskyttelsen er aktiv, begrenses bruken av SQL-funksjoner (som ikke er merket som SQLITE_INNOCUOUS) i triggere, visninger, CHECK-uttrykk og DEFAULT, indekser og genererte kolonner. Bruken av virtuelle tabeller i triggere og visninger deaktiveres ogs\u00e5, med mindre den virtuelle tabellen er eksplisitt erkl\u00e6rt med flagget SQLITE_VTAB_INNOCUOUS.\n<li class=\"l\"> Muligheten for \u00e5 tildele visse funksjoner i SQL-applikasjoner egenskaper har blitt implementert  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/c3ref\/c_deterministic.html#sqliteinnocuous\">SQLITE_INNOCUOUS<\/a><\/noindex> (ufarlige funksjoner som ikke er avhengige av eksterne parametere og ikke kan brukes til \u00e5 utf\u00f8re skadelige handlinger) og <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/c3ref\/c_deterministic.html#sqlitedirectonly\">SQLITE_DIRECTONLY<\/a><\/noindex> (kun direkte kald i SQL-sp\u00f8rsm\u00e5l, uten mulighet for bruk i triggere, visninger og datamodeller);\n<li class=\"l\"> Modul lagt til <noindex><a rel=\"nofollow\" href=\"https:\/\/sqlite.org\/src\/file\/ext\/misc\/uuid.c\">uuid<\/a><\/noindex> implementering av funksjoner for h\u00e5ndtering av UUID (RFC-4122);\n<li class=\"l\"> PRAGMA er lagt til <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/pragma.html#pragma_hard_heap_limit\">hard_heap_limit<\/a><\/noindex> og funksjonen  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/c3ref\/hard_heap_limit64.html\">sqlite3_hard_heap_limit64()<\/a><\/noindex> for \u00e5 h\u00e5ndtere maksimal st\u00f8rrelse p\u00e5 heap-en;\n<li class=\"l\"> I PRAGMA <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/pragma.html#pragma_function_list\">function_list<\/a><\/noindex> er det lagt til utdata om typen, egenskapene og antallet argumenter for hver funksjon;\n<li class=\"l\"> I den virtuelle tabellen DBSTAT  <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/dbstat.html#dbstatagg\">er lagt til<\/a><\/noindex> data aggregasjonsmodus;\n<li class=\"l\"> I sqlite3_open_v2() er det implementert et alternativ SQLITE_OPEN_NOFOLLOW, som forhindrer \u00e5pning av symbolske lenker;\n<li class=\"l\"> For argumentet <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/json1.html#jsonpath\">PATH<\/a><\/noindex>, som sendes i JSON-funksjoner, har f\u00e5tt st\u00f8tte for arraynotasjon &#171;#-N&#187;;\n<li class=\"l\"> I minneh\u00e5ndteringssystemet <noindex><a rel=\"nofollow\" href=\"http:\/\/sqlite.org\/malloc.html#lookaside\">lookaside<\/a><\/noindex> det er implementert st\u00f8tte for to separate minnepuljer, hver av dem kan brukes til \u00e5 tildele blokker av forskjellig st\u00f8rrelse (deling gj\u00f8r det mulig \u00e5 utvide bruken av lookaside-systemet, samtidig som st\u00f8rrelsen p\u00e5 bufferen som tildeles hver forbindelse reduseres fra 120 til 48 KB);\n<li class=\"l\"> St\u00f8tte for PRAGMA er avsluttet <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/pragma.html#pragma_legacy_file_format\">legacy_file_format<\/a><\/noindex>, som var inkompatibel med VACUUM, genererte kolonner og synkende indekser (st\u00f8tten for det utdaterte formatet kan gjenopprettes via flagget SQLITE_DBCONFIG_LEGACY_FILE_FORMAT i sqlite3_db_config()).\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Kilde: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=52238\">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 3.31.0, \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: \u0414\u043e\u0431\u0430\u0432\u043b\u0435\u043d\u0430 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u0433\u0435\u043d\u0435\u0440\u0438\u0440\u0443\u0435\u043c\u044b\u0445 \u0441\u0442\u043e\u043b\u0431\u0446\u043e\u0432 [&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-55593","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in 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