{"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\/es\/blog\/news\/reliz-subd-sqlite-3-32-proekt-duckdb-razvivaet-variant-sqlite-dlya-analiticheskih-zaprosov","title":{"rendered":"Lanzamiento de la base de datos SQLite 3.32. El proyecto DuckDB desarrolla una variante de SQLite para consultas anal\u00edticas.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/changes.html\">Publicado<\/a><\/noindex> lanzamiento <noindex><a rel=\"nofollow\" href=\"http:\/\/sqlite.org\/\">SQLite 3.32.0<\/a><\/noindex>, una base de datos liviana dise\u00f1ada como una biblioteca conectable. El c\u00f3digo de SQLite se distribuye como dominio p\u00fablico, es decir, puede ser utilizado sin restricciones y gratuitamente para cualquier prop\u00f3sito. El soporte financiero para los desarrolladores de SQLite es proporcionado por un consorcio creado espec\u00edficamente, que incluye empresas como Adobe, Oracle, Mozilla, Bentley y Bloomberg. <\/p>\n<p>Principales <noindex><a rel=\"nofollow\" href=\"https:\/\/sqlite.org\/releaselog\/3_32_0.html\">cambios<\/a><\/noindex>:<\/p>\n<ul>\n<li class=\"l\"> Se implement\u00f3 <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/lang_analyze.html#approx\">aproximado<\/a><\/noindex> una variante del comando ANALYZE que permite trabajar con estad\u00edsticas parciales en bases de datos muy grandes, sin la necesidad de un escaneo completo de \u00edndices. La restricci\u00f3n en el n\u00famero de registros al escanear un \u00edndice se establece mediante la nueva directiva &#171;<noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/pragma.html#pragma_analysis_limit\">PRAGMA analysis_limit<\/a><\/noindex>\u00ab.\n<li class=\"l\"> Se a\u00f1adi\u00f3 una nueva tabla virtual &#171;<noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/bytecodevtab.html\">bytecode<\/a><\/noindex>&#171;, que ofrece informaci\u00f3n sobre <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/opcode.html\">bytecode<\/a><\/noindex> de expresiones preparadas (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/c3ref\/stmt.html\">prepared statement<\/a><\/noindex>).\n<li class=\"l\"> Se a\u00f1adi\u00f3 una capa VFS <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/cksumvfs.html\">checksum<\/a><\/noindex>, que a\u00f1ade sumas de control de 8 bytes al final de cada p\u00e1gina de datos en la base de datos y las verifica en cada lectura de la base de datos. Esta capa permite detectar da\u00f1os en la base de datos como resultado de la corrupci\u00f3n accidental de bits en los dispositivos de almacenamiento.\n<li class=\"l\"> Se agreg\u00f3 una nueva funci\u00f3n SQL <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/lang_corefunc.html#iif\">iif(X,Y,Z)<\/a><\/noindex>, que devuelve el valor Y si la expresi\u00f3n X es verdadera, o Z en caso contrario.\n<li class=\"l\"> En las expresiones INSERT y UPDATE ahora siempre <noindex><a rel=\"nofollow\" href=\"https:\/\/sqlite.org\/src\/info\/86ba67afafded936\">se utiliza<\/a><\/noindex> se aplica la afinidad de tipos de columnas (<noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/datatype3.html#affinity\">column affinity<\/a><\/noindex>) antes de calcular las condiciones en el bloque <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/lang_createtable.html#ckconst\">CHECK<\/a><\/noindex>.\n<li class=\"l\"> El l\u00edmite en el n\u00famero de par\u00e1metros se ha incrementado de 999 a 32766.\n<li class=\"l\"> Se a\u00f1adi\u00f3 la extensi\u00f3n <noindex><a rel=\"nofollow\" href=\"https:\/\/www.sqlite.org\/uintcseq.html\">UINT collating sequence<\/a><\/noindex> con la implementaci\u00f3n de secuencias de ordenamiento que consideran n\u00fameros enteros en el texto para ordenar dicho texto en orden num\u00e9rico.\n<li class=\"l\"> En la interfaz de l\u00ednea de comandos, se a\u00f1adieron las opciones &#171;&#8212;csv&#187;, &#171;&#8212;ascii&#187; y &#171;&#8212;skip&#187; al comando &#171;.import&#187;. En el comando &#171;.dump&#187; se permite el uso de m\u00faltiples patrones LIKE fusionando en la salida todas las tablas que cumplen con las m\u00e1scaras proporcionadas. Se a\u00f1adi\u00f3 el comando &#171;.oom&#187; para las compilaciones de depuraci\u00f3n. Se a\u00f1adi\u00f3 la opci\u00f3n &#171;&#8212;bom&#187; a los comandos &#171;.excel&#187;, &#171;.output&#187; y &#171;.once&#187;. Se a\u00f1adi\u00f3 la opci\u00f3n &#171;&#8212;schema&#187; al comando &#171;.filectrl&#187;.\n<li class=\"l\"> La expresi\u00f3n ESCAPE indicada con el operador LIKE ahora reemplaza los caracteres comod\u00edn, lo que corresponde al comportamiento de PostgreSQL.\n<\/ul>\n<p>Adem\u00e1s, se puede se\u00f1alar el desarrollo de un nuevo SGBD <noindex><a rel=\"nofollow\" href=\"https:\/\/www.duckdb.org\/\">DuckDB<\/a><\/noindex>, en el que se est\u00e1 desarrollando una versi\u00f3n de SQLite optimizada para ejecutar <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/OLAP\">consultas anal\u00edticas.<\/a><\/noindex>.<br \/>\nAdem\u00e1s del c\u00f3digo de la interfaz de SQLite, el proyecto utiliza un analizador extra\u00eddo en una biblioteca separada de PostgreSQL, el componente Date Math de <noindex><a rel=\"nofollow\" href=\"https:\/\/www.monetdb.org\/\">MonetDB<\/a><\/noindex>, su propia implementaci\u00f3n de funciones de ventana (basada en el algoritmo Segment Tree Aggregation), un motor de ejecuci\u00f3n de consultas vectorizado (basado en el algoritmo Hyper-Pipelining Query Execution), y un procesador de expresiones regulares basado en la biblioteca <noindex><a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=25765\">RE2<\/a><\/noindex>, optimizadores de consultas propios y un mecanismo MVCC para el control concurrente de versiones de tareas (Control de Concurrencia de M\u00faltiples Versiones).<br \/>\nC\u00f3digo del proyecto <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/cwida\/duckdb\">se distribuye<\/a><\/noindex> bajo la licencia MIT. El desarrollo a\u00fan se encuentra en la fase <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/cwida\/duckdb\/releases\">la formaci\u00f3n<\/a><\/noindex> de lanzamientos experimentales.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fuente: <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 5.0.2 - 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