Tso tawm DBMS SQLite 3.33

luam tawm tso tawm SQLite 3.33.0, ib lub teeb DBMS tsim los ua lub tsev qiv ntawv plug-in. SQLite code yog faib raws li pej xeem sau, i.e. tuaj yeem siv yam tsis muaj kev txwv thiab pub dawb rau txhua lub hom phiaj. Kev them nyiaj yug rau SQLite developers yog muab los ntawm ib tug tshwj xeeb tsim consortium, uas muaj xws li cov tuam txhab xws li Adobe, Oracle, Mozilla, Bentley thiab Bloomberg.

ntsiab hloov:

  • Ua raws li kev qhia HLOOV TSHIAB LOS NTAWM hloov kho cov ntsiab lus ntawm lub rooj raws li kev xaiv los ntawm lwm lub rooj. Cov lus qhia siv syntax zoo ib yam nrog PostgreSQL.
  • Qhov siab tshaj plaws database loj tau nce mus rau 281 TB.
  • Π’ PRAGMA integrity_check Muaj peev xwm xaiv tau tsuas yog ib lub rooj tshwj xeeb thiab cov indexes cuam tshuam tau muab (yav dhau los tag nrho cov ntaub ntawv ib txwm raug kuaj xyuas).
  • Ntxiv txuas ntxiv decimal nrog arbitrary precision decimal arithmetic functions.
  • Hauv kev nthuav dav ib 754 Kev txhim kho tau tsim los txhawb binary64 tus lej.
  • Mus rau qhov hais kom ua kab interface (CLI) ntxiv tshiab tso zis formatting hom "box", "json", "markdown" thiab "table". Nyob rau hauv "kem" tso zis hom, txhua kab yuav tau nthuav dav raws li cov ntsiab lus ntawm cov kab ntev tshaj plaws. Nyob rau hauv "quote" tso zis hom, tus nqi ntawm cov separator teem los ntawm ".separator" hais kom ua yog coj mus rau hauv tus account.
  • Cov lej lej thiab ieee754 txuas ntxiv tau tsim rau hauv CLI.
  • Kev txhim kho tau raug ua rau tus neeg npaj nug. Txhim kho kev ua tau zoo ntawm "SELECT min(x) LOS NTAWM t Qhov twg y IN (?,?,?)" cov lus nug thaum qhov ntsuas t(x,y) nyob. Ua kom pom qhov muaj peev xwm ntawm kev siv tag nrho-index-scan query plan rau cov lus nug nrog "INDEXED BY" qhia.
  • lub hom WAL (Sau-Ua ntej Logging) Yog tias kev sau ntawv tsis ua haujlwm, ua rau cov ntaub ntawv ua txhaum cai hauv cov ntaub ntawv shm, kev hloov pauv tom ntej tam sim no tuaj yeem rov qab ua qhov ncaj ncees ntawm cov ntaub ntawv shm yog tias muaj cov ntawv nyeem nquag, tsis txhob cuam tshuam SQLITE_PROTOCOL yuam kev.

Tau qhov twg los: opennet.ru

Ntxiv ib saib