{"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\/sv\/blog\/news\/reliz-subd-sqlite-3-32-proekt-duckdb-razvivaet-variant-sqlite-dlya-analiticheskih-zaprosov","title":{"rendered":"Release of the SQLite 3.32 DBMS. The DuckDB project develops a variant of SQLite for analytical queries.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/changes.html\">Publicerad<\/a><\/noindex> utgivning <noindex><a rel=\"nofollow\" href=\"http:\/\/sqlite.org\/\">SQLite 3.32.0<\/a><\/noindex>, en l\u00e4ttviktsdatabas som presenteras som ett plugin-bibliotek. Koden f\u00f6r SQLite distribueras som allm\u00e4n egendom (public domain), vilket betyder att den kan anv\u00e4ndas utan begr\u00e4nsningar och kostnadsfritt f\u00f6r alla \u00e4ndam\u00e5l. Utvecklarna av SQLite f\u00e5r ekonomiskt st\u00f6d fr\u00e5n ett s\u00e4rskilt konsortium, som inkluderar f\u00f6retag som Adobe, Oracle, Mozilla, Bentley och Bloomberg. <\/p>\n<p>Huvud <noindex><a rel=\"nofollow\" href=\"https:\/\/sqlite.org\/releaselog\/3_32_0.html\">f\u00f6r<\/a><\/noindex>:<\/p>\n<ul>\n<li class=\"l\"> Implementerad <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/lang_analyze.html#approx\">approximated<\/a><\/noindex> ett alternativ av kommandot ANALYZE som m\u00f6jligg\u00f6r att arbeta med delvis insamling av statistik i mycket stora databaser, utan att genomf\u00f6ra en fullst\u00e4ndig skanning av indexen. Begr\u00e4nsningen f\u00f6r antalet poster vid skanning av ett index anges med hj\u00e4lp av den nya direktiven &#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\"> En ny virtuell tabell &#171;<noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/bytecodevtab.html\">bytecode<\/a><\/noindex>&#171; d\u00e4r information om <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/opcode.html\">bytecode<\/a><\/noindex> of prepared statements (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/c3ref\/stmt.html\">prepared statement<\/a><\/noindex>).\n<li class=\"l\"> A VFS layer has been added <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/cksumvfs.html\">checksum<\/a><\/noindex>, which adds 8-byte checksums at the end of each data page in the database and checks them upon each read from the database. This layer helps detect database corruption due to accidental bit distortion in storage devices.\n<li class=\"l\"> A new SQL function <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/lang_corefunc.html#iif\">iif(X,Y,Z)<\/a><\/noindex>, returns value Y if expression X is true, or Z otherwise.\n<li class=\"l\"> In INSERT and UPDATE statements, column types are now always <noindex><a rel=\"nofollow\" href=\"https:\/\/sqlite.org\/src\/info\/86ba67afafded936\">anv\u00e4nder<\/a><\/noindex> column affinity<noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/datatype3.html#affinity\">) preserved before evaluating conditions in the<\/a><\/noindex>CHECK <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/lang_createtable.html#ckconst\">block. The limit on the number of parameters has been increased from 999 to 32766.<\/a><\/noindex>.\n<li class=\"l\"> An extension has been added\n<li class=\"l\"> UINT collating sequence <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/uintcseq.html\">with the implementation of a sorting sequence that considers integers in text for sorting this text in numerical order.<\/a><\/noindex> In the command-line interface, the command \".import\" has added options \"\u2014csv\", \"\u2014ascii\", and \"\u2014skip\". In the command \".dump\", the usage of multiple LIKE patterns with merging of all tables matching the specified masks is allowed. A command \".oom\" has been added for debug builds. Options \"\u2014bom\" have been added to the commands \".excel\", \".output\", and \".once\". An option \"\u2014schema\" has been added to the command \".filectrl.\"\n<li class=\"l\"> I kommandoradsgr\u00e4nssnittet har kommandot &#171;.import&#187; f\u00e5tt till\u00e4gg av alternativen &#171;&#8212;csv&#187;, &#171;&#8212;ascii&#187; och &#171;&#8212;skip&#187;. I kommandot &#171;.dump&#187; \u00e4r det nu till\u00e5tet att anv\u00e4nda flera LIKE-mallar med sammanslagning av alla tabeller som matchar de angivna m\u00f6nstren. Kommandot &#171;.oom&#187; har lagts till f\u00f6r fels\u00f6kningsbyggen. Alternativet &#171;&#8212;bom&#187; har lagts till i kommandona &#171;.excel&#187;, &#171;.output&#187; och &#171;.once&#187;. I kommandot &#171;.filectrl&#187; har alternativet &#171;&#8212;schema&#187; lagts till.\n<li class=\"l\"> Additionally, it is worth noting the development of a new DBMS\n<\/ul>\n<p>DuckDB <noindex><a rel=\"nofollow\" href=\"https:\/\/www.duckdb.org\/\">, where a variant of SQLite optimized for executing<\/a><\/noindex>analytical queries <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/OLAP\">is being developed. In addition to the SQLite shell code, the project uses a separate library parser from PostgreSQL, the Date Math component from<\/a><\/noindex>.<br \/>\nMonetDB <noindex><a rel=\"nofollow\" href=\"https:\/\/www.monetdb.org\/\">, its own implementation of window functions (based on the Segment Tree Aggregation algorithm), a vectorized query execution engine (based on the Hyper-Pipelining Query Execution algorithm), and a regular expression processor based on the<\/a><\/noindex>RE2 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=25765\">library.<\/a><\/noindex>, egna fr\u00e5geoptimerare och MVCC-mekanismen f\u00f6r hantering av samtidig exekvering av uppgifter (Multi-Version Concurrency Control).<br \/>\nProjektkod <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/cwida\/duckdb\">sprids<\/a><\/noindex> under MIT-licensen. Utvecklingen \u00e4r fortfarande p\u00e5 stadiet <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/cwida\/duckdb\/releases\">av formation<\/a><\/noindex> experimentella utg\u00e5vor.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>K\u00e4lla: <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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