{"id":143994,"date":"2025-09-22T17:11:59","date_gmt":"2025-09-22T15:11:59","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/reliz-subd-duckdb-1-4-0-s-podderzhkoj-shifrovaniya-bd"},"modified":"2025-09-22T17:11:59","modified_gmt":"2025-09-22T15:11:59","slug":"reliz-subd-duckdb-1-4-0-s-podderzhkoj-shifrovaniya-bd","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/reliz-subd-duckdb-1-4-0-s-podderzhkoj-shifrovaniya-bd","title":{"rendered":"DuckDB 1.4.0 andmebaasi v\u00e4ljalase, millel on kr\u00fcptimise tugi.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Avaldati DuckDB andmebaasi uus versioon 1.4.0, mis on suunatud anal\u00fc\u00fctiliste p\u00e4ringute t\u00e4itmisele ja mille kontseptsioon meenutab SQLite't. DuckDB \u00fchendab endas SQLite omadused, nagu kompaktne suurus, integreeritav teegivorming, andmebaasi salvestamine \u00fchte faili ning CLI-liides, koos nende v\u00f5imaluste ja optimeeringutega, et teostada anal\u00fc\u00fctilisi p\u00e4ringuid, mis katab suure osa salvestatud andmetest, n\u00e4iteks kogudes kokku k\u00f5igi tabelite sisu v\u00f5i \u00fchendades mitu suurt tabelit. Projekti kood on kirjutatud C++ keeles ja see on litsentseeritud MIT litsentsi alusel.     <\/p>\n<p>DuckDB pakub laiendatud SQL keele dialekti, mis sisaldab t\u00e4iendavaid v\u00f5imalusi v\u00e4ga keeruliste ja pikaajaliste p\u00e4ringute seadmiseks. Toetatakse keeruliste t\u00fc\u00fcpide (massivid, struktuurid, \u00fchendused) kasutamist, samuti v\u00f5imalust teostada omavahelisi ja sisse-v\u00e4lja korreleeruvaid alam-p\u00e4ringuid. Samuti on lubatud mitme p\u00e4ringu samaaegne t\u00e4itmine ning p\u00e4ringute k\u00e4ivitamine otse CSV ja Parquet formaadis failidest. Toetatakse ka andmete importimist PostgreSQL andmebaasidest.    <\/p>\n<p>Projekt kasutab SQLite'i paketti, PostgreSQL'i parserit, MonetDB Date Math komponenti, enda aknafunktsioonide rakendust (Segment Tree Aggregation algoritmil p\u00f5hinev), RE2 raamatukogul p\u00f5hinevat regulaarsete v\u00e4ljendite t\u00f6\u00f6tlejat, enda p\u00e4ringute optimeerijat, MVCC-mehhanismi (Multi-Version Concurrency Control) t\u00e4itmise juhtide haldamiseks, samuti vektoreeritud p\u00e4ringute t\u00e4itmise mootori Hyper-Pipelining Query Execution algoritmil, mis v\u00f5imaldab \u00fches operatsioonis kiiresti t\u00f6\u00f6delda suuri v\u00e4\u00e4rtuste komplekte.    <\/p>\n<p>Uues versioonis:  <\/p>\n<ul>\n<li class=\"l\"> Lisatud tugi andmebaasi failide salvestamiseks kr\u00fcpteeritud kujul. Kr\u00fcpteerimiseks kasutatakse AES-256 GCM re\u017eiimi. Kr\u00fcpteeritakse mitte ainult peamine andmefail, vaid ka WAL-logid ja ajutised failid. Andmebaasi kr\u00fcpteerimisv\u00f5tmed m\u00e4\u00e4ratakse k\u00e4suga ATTACH l\u00e4bi parameetri ENCRYPTION_KEY.         ATTACH &#8216;encrypted.db&#8217; AS enc_db (ENCRYPTION_KEY &#8216;quack_quack&#8217;);\n<li class=\"l\"> Lisatud tugi k\u00e4sule &#171;MERGE INTO&#187;, mida saab kasutada alternatiivina v\u00e4ljendile &#171;INSERT &#8230; ON CONFLICT&#187;, mis ei n\u00f5ua peamist v\u00f5tit ja t\u00f6\u00f6tab juhuslike \u00fchinemise tingimustega.   K\u00e4sk &#171;MERGE INTO&#187; v\u00f5imaldab luua tingimuslikke SQL-v\u00e4ljendeid, mis \u00fchendavad \u00fches v\u00e4ljendis operatsioonid INSERT, UPDATE ja DELETE. N\u00e4iteks saab MERGE abil korraldada kahe tabeli \u00fchendamise, lisades puuduvad kirjed ning uuendades olemasolevaid.        WITH deletes(item_id, delete_threshold) AS (VALUES (10, 3000))         MERGE INTO Stock             USING deletes USING (item_id)         WHEN MATCHED AND balance &lt; delete_threshold             THEN DELETE         RETURNING merge_action, *;        \n\n<li class=\"l\"> Lisaks on Apache Icebergi formaadis tabelitega tegelemiseks lisatud kirjutusoperatsioonide tugi (varasemalt toetati ainult lugemist), mis v\u00f5imaldab andmete edastamist Icebergist DuckDB-sse ja tagasi.\n<li class=\"l\"> K\u00e4surea kliendisse on lisatud t\u00f6\u00f6protsessi edenemise n\u00e4idik, mis ennustab j\u00e4\u00e4kaja kuni toimingu l\u00f5puni.\n<li class=\"l\"> Lisatud akna funktsioon &#171;FILL&#187;, mida saab kasutada j\u00e4rjestatud akendes puuduolevate v\u00e4\u00e4rtuste interpoleerimiseks.         FROM (VALUES (1, 1), (2, NULL), (3, 42)) t(c1, c2)     SELECT fill(c2) OVER (ORDER BY c1) f;     1      21     42\n<li class=\"l\"> Rakendatud on Teradata Connectori lisand, mis v\u00f5imaldab \u00fchendada Teradata andmebaasidega. Lisand v\u00f5imaldab hallata tabeleid, edastada p\u00e4ringuid ja k\u00e4ivitada SQL-k\u00e4ske otse Teradatasse, kasutades DuckDB-d.\n<li class=\"l\"> Lisatud tugi m\u00e4lus salvestatud tabelite oleku fikseerimiseks (checkpoint), mis v\u00f5imaldas rakendada tihendamise tuge. Lisaks toimub oleku fikseerimisel kustutatud ridade puhastamine ja ruumi vabastamine p\u00e4rast kustutamistoiminguid.       ATTACH &#8216;:memory:&#8217; AS memory_compressed (COMPRESS);\n<li class=\"l\"> Pakutud on mitmeid j\u00f5udluse optimeerimise abin\u00f5usid: Sortimise elluviimine on \u00fcleviidud mitmerealise sulandamise algoritmi (k-way merge sort) kasutamise peale, mis v\u00e4hendab andmete liikumist. \u00dcldised tabeli v\u00e4ljendid (Common Table Expression, CTE) materialiseeritakse n\u00fc\u00fcd vaikes\u00e4tetena.          <\/ul>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63922\">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 \u0432\u044b\u043f\u0443\u0441\u043a \u0421\u0423\u0411\u0414 DuckDB 1.4.0, \u043e\u0440\u0438\u0435\u043d\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u0439 \u043d\u0430 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u0435 \u0430\u043d\u0430\u043b\u0438\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0437\u0430\u043f\u0440\u043e\u0441\u043e\u0432 \u0438 \u043a\u043e\u043d\u0446\u0435\u043f\u0442\u0443\u0430\u043b\u044c\u043d\u043e \u043d\u0430\u043f\u043e\u043c\u0438\u043d\u0430\u044e\u0449\u0435\u0439 SQLite. 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