Performance Enhancements: Many micro-optimizations result in 20.3% more work for the same number of CPU cycles relative to the previous release. The cumulative performance increase since version 3.8.0 is 61%. (Measured using cachegrind on the speedtest1.c workload on Ubuntu 13.10 x64 with gcc 4.8.1 and -Os. Your performance may vary.) The sorter can use auxiliary helper threads to increase real-time response. This feature is off by default and may be enabled using the PRAGMA threads command or the SQLITE_DEFAULT_WORKER_THREADS compile-time option. Enhance the skip-scan optimization so that it is able to skip index terms that occur in the middle of the index, not just as the left-hand side of the index. Improved optimization of CAST operators. Various improvements in how the query planner uses sqlite_stat4 information to estimate plan costs.
New Features: Added new interfaces with 64-bit length parameters: sqlite3_malloc64(), sqlite3_realloc64(), sqlite3_bind_blob64(), sqlite3_result_blob64(), sqlite3_bind_text64(), and sqlite3_result_text64(). Added the new interface sqlite3_msize() that returns the size of a memory allocation obtained from sqlite3_malloc64() and its variants. Added the SQLITE_LIMIT_WORKER_THREADS option to sqlite3_limit() and PRAGMA threads command for configuring the number of available worker threads. The spellfix1 extension allows the application to optionally specify the rowid for each INSERT. Added the User Authentication extension.
Bug Fixes: Fix a bug in the partial index implementation that might result in an incorrect answer if a partial index is used in a subquery or in a view. Ticket 98d973b8f5. Fix a query planner bug that might cause a table to be scanned in the wrong direction (thus reversing the order of output) when a DESC index is used to implement the ORDER BY clause on a query that has an identical GROUP BY clause. Ticket ba7cbfaedc7e6. Fix a bug in sqlite3_trace() that was causing it to sometimes fail to print an SQL statement if that statement needed to be re-prepared. Ticket 11d5aa455e0d98f3c1e6a08 Fix a faulty assert() statement. Ticket 369d57fb8e5ccdff06f1 0415NAME IS NULL2014/10/19(日) 18:34:23.11ID:??? ユーザー認証拡張が興味深い 0416NAME IS NULL2014/10/20(月) 17:14:47.83ID:??? 小さな改善をコツコツ積み重ねたら20.3%高速化したってこと? すごいね。 0417NAME IS NULL2014/10/20(月) 22:24:19.30ID:??? 開発チームはいい仕事するね でもオプティマイザの改善は使う側がへボイと逆に100倍遅くなるんこともあるんだ もちろん俺のことさ その改善バージョンのリリースノートにもご丁寧に書いてあったよ。インデックス張れってね ハハハ 0418NAME IS NULL2014/11/06(木) 01:03:53.85ID:??? 3.8.7.1 来てた 0419NAME IS NULL2014/11/06(木) 02:57:56.17ID:??? SQLite Release 3.8.7.1 On 2014-10-30 (3.8.7.1)
In PRAGMA journal_mode=TRUNCATE mode, call fsync() immediately after truncating the journal file to ensure that the transaction is durable across a power loss. Fix an assertion fault that can occur when updating the NULL value of a field at the end of a table that was added using ALTER TABLE ADD COLUMN. Do not attempt to use the strchrnul() function from the standard C library unless the HAVE_STRCHRNULL compile-time option is set. Fix a couple of problems associated with running an UPDATE or DELETE on a VIEW with a rowid in the WHERE clause. 0420NAME IS NULL2014/11/19(水) 22:18:26.92ID:+solJAhq SQLite Release 3.8.7.2 On 2014-11-19 (3.8.7.2)
・Enhance the ROLLBACK command so that pending queries are allowed to continue as long as the schema is unchanged. Formerly, a ROLLBACK would cause all pending queries to fail with an SQLITE_ABORT or SQLITE_ABORT_ROLLBACK error. That error is still returned if the ROLLBACK modifies the schema. ・Bug fix: Make sure that NULL results from OP_Column are fully and completely NULL and do not have the MEM_Ephem bit set. Ticket 094d39a4c95ee4. ・Bug fix: The %c format in sqlite3_mprintf() is able to handle precisions greater than 70. ・Bug fix: Do not automatically remove the DISTINCT keyword from a SELECT that forms the right-hand side of an IN operator since it is necessary if the SELECT also contains a LIMIT. Ticket db87229497. 0421NAME IS NULL2014/12/04(木) 12:10:10.16ID:??? Accessしか知らない無知で申し訳ない このDBMSは、Accessのようにあらかじめクエリを登録しておき 後からそのクエリを呼び出す仕組みはないと理解してよいのかな? 何らかの言語から都度クエリ文字列をexecuteするしかない? 0422NAME IS NULL2014/12/04(木) 14:59:30.95ID:???>>421 view を使えばいいですよ http://www.sqlite.org/lang_createview.html0423NAME IS NULL2014/12/04(木) 15:19:11.36ID:???>>422 早速ありがとう 勉強してみます 0424NAME IS NULL2014/12/06(土) 23:04:14.40ID:LOwRbxtB SQLiteでのレコードの削除について質問させて下さい。
自分なりに調べて以下を記述したらエラーになりました。 delete from テーブル名 where flag = 0 order by dateData limit 1 どうぞ宜しくお願いします。 0425NAME IS NULL2014/12/06(土) 23:30:15.55ID:??? SQLite関係ないな 0426NAME IS NULL2014/12/07(日) 00:03:15.50ID:??? へぇー これエラーになるのか 面白いな 0427NAME IS NULL2014/12/07(日) 00:38:28.95ID:??? SQLiteSpy 1.9.8 win32 でちゃちゃっと
[1] create table testtable(dateData int, flag int)
>Optional LIMIT and ORDER BY clauses > >If SQLite is compiled with the SQLITE_ENABLE_UPDATE_DELETE_LIMIT compile-time option, >then the syntax of the DELETE statement is extended by the addition of optional >ORDER BY and LIMIT clauses:
もう少し勉強して他の方法を探します。 0432NAME IS NULL2014/12/07(日) 11:44:36.21ID:??? 行と行の比較をするんだから、相関サブクエリ使うところじゃね? 0433NAME IS NULL2014/12/07(日) 12:09:28.77ID:??? まあ1件しか無いのなら、min()で1件ひけば済むことではあるな 04344242014/12/07(日) 22:25:21.00ID:??? delete from テーブル名 where flag= 0 and dateData = (select min(dateData) from テーブル名 where flag= 0 で出来ました。 レスくれた方々ありがとうございました。 0435NAME IS NULL2014/12/10(水) 23:35:36.34ID:??? SQLite Release 3.8.7.4 On 2014-12-09 (3.8.7.4)
Bug fix: Add in a mutex that was omitted from the previous release. 0436あ2014/12/25(木) 19:45:05.19ID:??? /:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::ヽ /:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::://ヽ:::::::::::::::| l:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::// ヽ::::::::::::::l l:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::/:::「'ヽ:::::::::::// ヽ:::::::::::| |::::::::::::::::::::::::::::::::::::::::::::::::::::::::::ノl:::ノ l:::::::/ ヽ::::::::| ノ:::::::::::::::::::::::::::::::::::::::::::::::::::::/ ゙゙ ノ:::/ ,,;;;;;;,, ,,,,ヽ:::::l ):::::::::::::::::::::::::::::::::::::::::::::::/ ノ/ __,'''i: ('''__):::l )::::::::::::::::::::::::::::::::::::::::::::::::::/  ̄ ̄ン:. :「 ̄`ヾ 1:::::::::::::::::::::::「 `┤l:::::::::::::::::l  ̄ , ヽ ̄ l `l:::::::::::::::::::::ヽ :l li:::::::::::::/ ヽ /´ `l | ヽ::::::::::::::::::::::\_」 lヽ::::/ .l !:-●,__ ノ / ノ:::::::::::::::::::::::::::ノ | l `゙゙ i ,,;;;;;;;;;;;;;;;;;;;;, /ヽ ,/ ヽ::::::::::::::::::::::( l l::::::::.. /.:''/´ ̄_ソ / `ヽ ヽ:::::::::::::::ヽ | l:::::::::::... /::// ̄ ̄_ソ / \ ヴッ!! ヽ:::::::\| l::::::::::::::::... / :::.ゝ` ̄ ̄/ / ヽ ヽ:::l l:::::::::::::::::::..  ̄ ̄;;'' / ヽ l l;;;;;;:::::::::::::::.....;;;;............;;;;;;''ノ l l l '''''''''''''''''''''''''''''''''''''' ̄l | |
http://www.youtube.com/watch?v=z2qK2lhk9O00437NAME IS NULL2015/01/16(金) 10:48:39.56ID:??? プログラミング歴は、10年以上になりますが DBに関しては1年強レベルです。 で、質問なんですがSQLightを主に使っているんですが 命令文での、orとand文は、左結合ですか? あと試した事は無いですがorとand文辺りは カッコでくくっても認識してくれるんでしょうか? どなたかご教示願います。 0438NAME IS NULL2015/01/16(金) 16:28:43.73ID:??? 10年以上もプログラミング歴がある割に それくらい聞くより調べるほうが簡単で早くて正確だとわからないなんて…… 0439NAME IS NULL2015/01/16(金) 17:03:59.81ID:??? ネットがなかった頃からやってるんじゃね 本屋に買いに行って調べるより電話で聞く方が早いと思ってるんだろう 0440NAME IS NULL2015/01/16(金) 17:09:53.39ID:??? とりあえず使ってるDBの名前を正しく覚えよう 0441NAME IS NULL2015/01/16(金) 19:53:53.11ID:??? こんな奴にプログラマとかSEとかIT技術者とかなんとかエンジニアとか名乗られたくないな。 存在が迷惑死、業界から消えてくれ。 0442NAME IS NULL2015/01/17(土) 07:50:19.49ID:??? SQLite Release 3.8.8
・Added the PRAGMA data_version command that can be used to determine if a database file has been modified by another process. ・Added the SQLITE_CHECKPOINT_TRUNCATE option to the sqlite3_wal_checkpoint_v2() interface, with corresponding enhancements to PRAGMA wal_checkpoint. ・Added the sqlite3_stmt_scanstatus() interface, available only when compiled with SQLITE_ENABLE_STMT_SCANSTATUS. ・The sqlite3_table_column_metadata() is enhanced to work correctly on WITHOUT ROWID tables and to check for the existence of a a table if the column name parameter is NULL. The interface is now also included in the build by default, without requiring the SQLITE_ENABLE_COLUMN_METADATA compile-time option. ・Added the SQLITE_ENABLE_API_ARMOR compile-time option. ・Added the SQLITE_REVERSE_UNORDERED_SELECTS compile-time option. ・Added the SQLITE_SORTER_PMASZ compile-time option and SQLITE_CONFIG_PMASZ start-time option. ・Added the SQLITE_CONFIG_PCACHE_HDRSZ option to sqlite3_config() which makes it easier for applications to determine the appropriate amount of memory for use with SQLITE_CONFIG_PAGECACHE. ・The number of rows in a VALUES clause is no longer limited by SQLITE_LIMIT_COMPOUND_SELECT. ・Added the eval.c loadable extension that implements an eval() SQL function that will recursively evaluate SQL. 0443NAME IS NULL2015/01/21(水) 07:42:58.84ID:??? SQLite Release 3.8.8.1
・Fix a bug in the sorting logic, present since version 3.8.4, that can cause output to appear in the wrong order on queries that contains an ORDER BY clause, a LIMIT clause, and that have approximately 60 or more columns in the result set. Ticket f97c4637102a3ae72b79. 0444NAME IS NULL2015/01/21(水) 21:26:58.85ID:??? バージョンアップが激しすぎてついていけない、、、 0445NAME IS NULL2015/03/01(日) 00:37:15.47ID:sjX82R5K>>440 神戸市の東、芦屋西宮の知的障害者施設で未成年利用者に性的な行為をして淫行条例で逮捕された三田谷学園元職員の堂垣直人(西宮市老松町)は、結局どういう罪になったの? 被害者家族のケアを芦屋市役所と兵庫県警はちゃんとやったのか? 差別や虐待は環境を選べない子供には関係ない。
Added the sqldiff.exe utility program for computing the differences between two SQLite database files. Added the y format string to the matchinfo() function of FTS3. Performance improvements for ORDER BY, VACUUM, CREATE INDEX, PRAGMA integrity_check, and PRAGMA quick_check. Fix many obscure problems discovered while SQL fuzzing. Identify all methods for important objects in the interface documentation. (example) Made the American Fuzzy Lop fuzzer a standard part of SQLite's testing strategy. Add the ".binary" and ".limits" commands to the command-line shell. Make the "dbstat" virtual table part of standard builds when compiled with the SQLITE_ENABLE_DBSTAT_VTAB option. 0448NAME IS NULL2015/05/25(月) 10:34:24.59ID:aYoHQFUg 環境:VC#2013 + System.Data.Sqlite(1.0.96.0)
New feature: Add the SQLITE_FCNTL_JOURNAL_POINTER file control.
Bug fix: Fix a 16-month-old bug in the query planner that could generate incorrect results when a scalar subquery attempts to use the block sorting optimization. 0490NAME IS NULL2016/01/24(日) 10:39:11.64ID:sOgNYorS SQLite4はどうなっとんのや? 0491NAME IS NULL2016/01/24(日) 21:47:10.38ID:LKzcjvMc マ イ ン ド コ ン ト ロ ー ル の手法