SQLite 3.10 发布,性能优化

jopen 7年前

SQLite 3.10 发布,更新如下:

  • Added support for LIKE, GLOB, and REGEXP operators on virtual tables.

  • Added the colUsed field to sqlite3_index_info for use by    the sqlite3_module.xBestIndex method.

  • Enhance the PRAGMA cache_spill statement to accept a 32-bit integer    parameter which is the threshold below which cache spilling is prohibited.

  • On unix, if a symlink to a database file is opened, then the corresponding    journal files are based on the actual filename, not the symlink name.

  • Added the "--transaction" option to sqldiff.

  • Added the sqlite3_db_cacheflush() interface.

  • Added the sqlite3_strlike() interface.

  • When using memory-mapped I/O map the database file read-only so that stray pointers    and/or array overruns in the application cannot accidently modify the database file.

  • Added the experimental sqlite3_snapshot_get(), sqlite3_snapshot_open(),    and sqlite3_snapshot_free() interfaces.  These are subject to change or removal in    a subsequent release.

  • Enhance the 'utc' modifier in the date and time functions so that it is a no-op if    the date/time is known to already be in UTC.  (This is not a compatibility break since    the behavior has long been documented as "undefined" in that case.)

  • Added the json_group_array() and json_group_object() SQL functions in the    json extension.

  • Added the SQLITE_LIKE_DOESNT_MATCH_BLOBS compile-time option.

  • Many small performance optimizations.

    Portability enhancements:

  • Work around a sign-exension bug in the optimizer of the HP C compiler on HP/UX.    (details)

    Enhancements to the command-line shell:

  • Added the ".changes ON|OFF" and ".vfsinfo" dot-commands.

  • Translate between MBCS and UTF8 when    running in cmd.exe on Windows.

    Enhancements to makefiles:

  • Added the --enable-editline and --enable-static-shell options    to the various autoconf-generated configure scripts.

  • Omit all use of "awk" in the makefiles, to make building easier for MSVC users.

    Important fixes:

  • Fix inconsistent integer to floating-point comparison operations that    could result in a corrupt index if the index is created on a table    column that contains both large integers and floating point values    of similar magnitude.  Ticket    38a97a87a6.

  • Fix an infinite-loop in the query planner that could occur on    malformed common table expressions.

  • Various bug fixes in the sqldiff tool.


  • SQLITE_SOURCE_ID: "2016-01-06 11:01:07 fd0a50f0797d154fefff724624f00548b5320566"

  • SHA1 for sqlite3.c: b92ca988ebb6df02ac0c8f866dbf3256740408ac

更多内容请看:Version 3.10.0




SQLite 3.10 发布,性能优化



来自: http://www.oschina.net/news/69673/sqlite-3-10