Perl RDBMS Programming(DBI/DBIx::Sunnyã®ã¯ãªã—)1. Perl RDBMS Programming id:karupanerura DBI DBIx::* SQL::* etc... 13å¹´3月23日土曜日 2. about.me id:karupanerura ã‹ã‚‹ã±ãるら web engineer c/js/perl/elisp ã•ã„ãã‚“H本èªã‚“ã§ã‚‹ MF 13å¹´3月23日土曜日
DBIã®connect_cachedã®ã„ã‚ã„ã‚ - $shibayu36->blog;
最近DBã¸ã®æŽ¥ç¶šã‚’リクエストå˜ä½ã§ã¯ãªãリクエストを処ç†ã™ã‚‹ãƒ—ãƒã‚»ã‚¹å˜ä½(Starmanã®workerプãƒã‚»ã‚¹å˜ä½)ã§ã‚ャッシュã—ãŸã„ã¨ã„ã†ã“ã¨ãŒã‚ã£ã¦ã€DBIã®connect_cachedを使ã†ã“ã¨ã«ãªã£ãŸã€‚Scope::Container::DBIã§ã‚‚ã‚‚ã—ã‹ã—ãŸã‚‰å‡ºæ¥ã‚‹ã®ã‹ã‚‚ã—ã‚Œãªã„ã‘ã©ã€ã¨ã‚Šã‚ãˆãšconnect_cachedã§å®Ÿè£…ã—ãŸã€‚ãã“ã§ã„ã‚ã„ã‚ã¯ã¾ã£ãŸã®ã§ãƒ¡ãƒ¢ã€‚ connect_cachedã«ã¤ã„㦠perldocã« connect_cached is like "connect", except that the database handle returned is also stored in a hash associated with the given parameters. If another call is made to connect_cached wit
ã™ã¹ã¦ã®ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹æŽ¥ç¶šã‚’切æ–ã™ã‚‹ - DBIx::DisconnectAll - Articles Advent Calendar 2012 Hacker
æ¯åã®ã‚µãƒ³ã‚¿ã‚¯ãƒãƒ¼ã‚¹1å· kazeburo ã§ã™ã€‚ ウェブアプリケーションãªã©ã§ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã¨ã®æŽ¥ç¶šã‚’リクエスト終了後ã«åˆ‡ã‚ŠãŸã„ã‚“ã ã‘ã©ã€ã‚¢ãƒ—リケーションã®ã©ã“ã‹ã§å¾ªç’°å‚ç…§ã—ã¦ãŸã‚Šã§ $dbh ãŒè§£æ”¾ã•ã‚Œãªã„ã¨ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã«æŽ¥ç¶šãŒæºœã¾ã‚Šã€ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã®æœ€å¤§æŽ¥ç¶šæ•°ã«é”ã—ã¦æ–°è¦ã®æŽ¥ç¶šãŒã§ããªããªã‚Šã€æ£å¸¸ã«ã‚µãƒ¼ãƒ“スãŒç¶šã‘られãªããªã£ãŸã‚Šã€æ¤…åãŒé£›ã‚“ã§ããŸã‚Šã—ã¾ã™ã€‚ アプリケーションã®ãƒã‚°ãŒã™ãã«è¦‹ã¤ã‹ã‚Šã€æŽ¥ç¶šã®æ»žç•™ãŒè§£æ¶ˆã§ãã‚Œã°ã„ã„ã§ã™ãŒã€ãã†ã§ã¯ãªã„時ã€ã“ã®ãƒ¢ã‚¸ãƒ¥ãƒ¼ãƒ«ãŒå½¹ã«ç«‹ã¤ã‹ã‚‚ã—ã‚Œã¾ã›ã‚“ https://metacpan.org/module/DBIx::DisconnectAll https://github.com/kazeburo/DBIx-DisconnectAll 使ã„æ–¹ã¯ç°¡å˜ã€‚ use DBIx::DisconnectAll; dbi_disconnect_all(); dbi
DBI->connect 時ã«ä½¿ã†é‰„æ¿ã‚ªãƒ—ションを教ãˆã¦ï¼ - blog.nomadscafe.jp
perlã§ãƒ‡ãƒ¼ã‚¿ãƒ™ãƒ¼ã‚¹ã‚’使ã†æ™‚ã«èª°ã‚‚ãŒå¿…ãšä½¿ã†DBI。ãã®æŽ¥ç¶šæ™‚ã«ä½¿ã†connectメソッドã®ç¬¬4引数ã«è¨å®šã—ã¦ã„るオプションãŒã‚µãƒ¼ãƒ“スã«ã‚ˆã‚Šã¾ã¡ã¾ã¡ãªã‚“ã ã‘ã©ã€ã ã‚Œã‹é‰„æ¿è¨å®šã‚’æ•™ãˆã¦ãã ã•ã„。 僕ãŒä½¿ã†ã®ãŒã€ my $dbh = DBI->connect($dsn, $user, $password, { AutoCommit => 1, PrintError => 0, RaiseError => 1, ShowErrorStatement => 1, AutoInactiveDestroy => 1, }); ã“れ。 åŠ ãˆã¦ã€mysqlã§ã‚れ㰠mysql_enable_utf8 => 1 mysql_auto_reconnect => 0, SQLiteã 㨠sqlite_unicode => 1 sqlite_use_immediate_transaction => 1 ã‚’è¿½åŠ ã—
Teng ã§ãƒˆãƒ©ãƒ³ã‚¶ã‚¯ã‚·ãƒ§ãƒ³å‡¦ç† & ã¯ã¾ã£ãŸç‚¹ - amari3ã®æ—¥è¨˜
å‰å›žã¯ã€Teng ã§ä¸€é€šã‚Šã® CRUD ã®ä»•æ–¹ã‚’紹介ã—ãŸã‚“ã§ã™ãŒã€ãƒˆãƒ©ãƒ³ã‚¶ã‚¯ã‚·ãƒ§ãƒ³å‡¦ç†ã‚’考慮ã—ã¦ã„ãªã‹ã£ãŸã®ã§ã€Teng ã§ãƒˆãƒ©ãƒ³ã‚¶ã‚¯ã‚·ãƒ§ãƒ³å‡¦ç†ã‚’ã™ã‚‹æ–¹æ³•ã‚’紹介ã—ã¾ã™ã€‚ 準備 テーブルã¯å‰å›žä½¿ç”¨ã—㟠memo テーブルを使ã„ã¾ã™ã€‚ 事å‰ã«ä»¥ä¸‹ã®æ§˜ãªãƒ‡ãƒ¼ã‚¿ã‚’入れã¦ãŠãã¾ã—ãŸã€‚ mysql> select * from memo order by id; +----+-------+---------+---------------------+---------------------+ | id | title | body | created_at | updated_at | +----+-------+---------+---------------------+---------------------+ | 1 | Hello | World | 2011-11-24 23:0
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大体ã®RDBMSã§savepointã¨ã„ã†æ©Ÿèƒ½ãŒå®Ÿè£…ã•ã¦ãŠã‚‹ã‚ã‘ã§ã™ãŒã€ æ£ç›´savepointを今ã¾ã§ã¤ã‹ã£ãŸã“ã¨ã‚ã‚Šã¾ã›ã‚“ã§ã—ãŸã€‚ savepointã«ã¤ã„ã¦ã¯ http://dev.mysql.com/doc/refman/5.1/ja/savepoints.html http://msdn.microsoft.com/ja-jp/library/ms378414%28SQL.90%29.aspx ãªã©ã‚’見るã¨ã‚ˆã„ã§ã—ょã†ã€‚ ç°¡å˜ã«è¨€ã†ã¨ã€ãƒˆãƒ©ãƒ³ã‚¶ã‚¯ã‚·ãƒ§ãƒ³ã®é€”ä¸ã§ã‚¨ãƒ©ãƒ¼ã«ãªã£ãŸå ´åˆã€ savepointã§ãƒžãƒ¼ã‚¯ã—ãŸå ´æ‰€ã«ã¾ã§rollbackã§æˆ»ã‚Œã‚‹ã£ã¦ã‹ã‚“ã˜ã™ã。 ã§ã€ä½¿ã„ã©ã“ã‚ã¨ã—ã¦ã¯ 複数ã®ãƒ—ãƒã‚»ã‚¹ãŒåŒãƒ†ãƒ¼ãƒ–ルをinsertã—ãŸã‚Šã™ã‚‹ã¨ãã«ãƒ¦ãƒ‹ãƒ¼ã‚¯åˆ¶ç´„ãŒã‹ã‹ã£ã¦dupã§è½ã¡ã‚‹æ™‚ãªã‚“ã‹ã« 使ã£ãŸã‚Šã™ã‚‹ã®ã‹ãªãƒ¼ã¨æ€ã£ã¦ã„ã‚‹ã®ã§ã™ãŒã€ ã‚‚ã£ã¨æœ‰åŠ¹ãªä½¿ã„æ–¹ãŒã‚ã‚‹ã‚“ã˜ã‚ƒãªã„ã‹ãªã¨ãŠã‚‚ã£ã¦ã„
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