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9.3. 明示的ãƒãƒƒã‚¯PostgreSQLã¯ã€ãƒ†ãƒ¼ãƒ–ル内ã®ãƒ‡ãƒ¼ã‚¿ã«å¯¾ã™ã‚‹åŒæ™‚アクセスを制御ã™ã‚‹ãŸã‚ã«ã•ã¾ã–ã¾ãªç¨®é¡žã®ãƒãƒƒã‚¯ãƒ¢ãƒ¼ãƒ‰ã‚’å‚™ãˆã¦ã„ã¾ã™ã€‚ ã“れらã®ãƒ¢ãƒ¼ãƒ‰ã¯ã€MVCC ã§ã¯å¿…è¦ãªå‹•ä½œã‚’得られãªã„å ´åˆã€ã‚¢ãƒ—リケーション制御ã®ãƒãƒƒã‚¯ã«ä½¿ç”¨ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ ã¾ãŸã€ã»ã¨ã‚“ã©ã® PostgreSQL コマンドã§ã¯ã€å‚ç…§ã•ã‚Œã‚‹ãƒ†ãƒ¼ãƒ–ルãŒãã®ã‚³ãƒžãƒ³ãƒ‰ã®å®Ÿè¡Œä¸ã«åˆ¥ã®æ–¹æ³•ã§å‰Šé™¤ã‚‚ã—ãã¯å¤‰æ›´ã•ã‚Œã¦ã„ãªã„ã“ã¨ã‚’確実ã«ã™ã‚‹ãŸã‚ã«ã€é©åˆ‡ãªãƒ¢ãƒ¼ãƒ‰ã®ãƒãƒƒã‚¯ã‚’自動的ã«ç²å¾—ã—ã¾ã™ã€‚ (ãŸã¨ãˆã°ã€ALTER TABLE コマンドã¯ã€åŒã˜ãƒ†ãƒ¼ãƒ–ルã«å¯¾ã™ã‚‹ä»–ã®æ“作ã¨ã¯åŒæ™‚ã«å®Ÿè¡Œã§ãã¾ã›ã‚“。) 9.3.1. テーブルレベルãƒãƒƒã‚¯ 以下ã®ãƒªã‚¹ãƒˆã«ã€PostgreSQL ã§è‡ªå‹•çš„ã«åˆ¶å¾¡ã•ã‚Œã‚‹ã€ä½¿ç”¨å¯èƒ½ãªãƒãƒƒã‚¯ãƒ¢ãƒ¼ãƒ‰ãŠã‚ˆã³ã“れらãŒä½¿ç”¨ã•ã‚Œã‚‹ã‚³ãƒ³ãƒ†ã‚ストを示ã—ã¾ã™ã€‚ ã“れらã®ãƒãƒƒã‚¯ãƒ¢ãƒ¼ãƒ‰ã¯ã€ãŸã¨ãˆãã®åå‰ã« "row" (è¡Œ)
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Appendix A. PostgreSQL Error Codes
All messages emitted by the PostgreSQL server are assigned five-character error codes that follow the SQL standard's conventions for “SQLSTATE†codes. Applications that need to know which error condition has occurred should usually test the error code, rather than looking at the textual error message. The error codes are less likely to change across PostgreSQL releases, and also are not subject to
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ã„よã„よ待望ã®PostgreSQL 8.1ã®ãƒ™ãƒ¼ã‚¿ãƒ»ãƒ†ã‚¹ãƒˆãŒé–‹å§‹ã•ã‚ŒãŸã€‚ã¾ãŸï¼Œæ–°ãŸãªã‚³ã‚¢ãƒ¡ãƒ³ãƒãŒè¿½åŠ ã•ã‚ŒãŸãªã©ï¼Œä»Šå›žã¯ãŠå±Šã‘ã™ã‚‹ãƒ‹ãƒ¥ãƒ¼ã‚¹ãŒè±Šå¯Œã«ã‚ã‚‹ãŒï¼Œã¨ã‚Šã‚ãˆãšè»½ã„話題ã‹ã‚‰ã€‚ OSCON 2005å ±å‘Š 8月ã«Open Souce Convention 2005(OSCON 2005)ã«å‚åŠ ã—ã¦ããŸã®ã§ï¼Œç°¡å˜ã«å ±å‘Šã™ã‚‹ã€‚ OSCONã¯ï¼Œã‚³ãƒ³ãƒ”ュータ関連ã®å‡ºç‰ˆå¤§æ‰‹ã®ç±³O'ReillyãŒæ¯Žå¹´é–‹å‚¬ã—ã¦ã„るオープンソース関連ã®ã‚³ãƒ³ãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ã§ã‚る。ãƒãƒ¥ãƒ¼ãƒˆãƒªã‚¢ãƒ«ã‚„セミナー(有償)ã®ä»–，ブース展示もã‚ã‚‹(å…¥å ´ç„¡æ–™)。ç†è€…今回8/3ã‹ã‚‰8/5ã¾ã§é–‹å‚¬ã•ã‚ŒãŸã‚»ãƒŸãƒŠãƒ¼ã¨ãƒ–ース展示を見å¦ã—ãŸã€‚ OSCONä¼šå ´ã¯ï¼Œç±³å›½è¥¿æµ·å²¸ã®é™ã‹ãªè¡—オレゴン州ãƒãƒ¼ãƒˆãƒ©ãƒ³ãƒ‰ã®ã‚³ãƒ³ãƒ™ãƒ³ã‚·ãƒ§ãƒ³ã‚»ãƒ³ã‚¿ãƒ¼ã«è¨å®šã•ã‚Œã¦ã„ãŸã€‚ãƒãƒ¼ãƒˆãƒ©ãƒ³ãƒ‰ã¯ã‚¹ãƒãƒ¼ã‚¬ãƒ³ãŒã€ŒèŠ±ã®è¡—ã€ã¨ã„ã†ã“ã¨ã«ãªã£ã¦ã„るらã—ã，ã‚ã¡ã“ã¡ã«èŠ±ã‚’見掛ã‘る美ã—ã„è¡—ã§ã‚る（写真1）。
Railsã¨PostgreSQLã®æŽ¥ç¶šã‚’作る
Railsã‹ã‚‰PostgreSQLã¸æŽ¥ç¶šã—ã¦ã¿ã‚‹ PostgreSQLã®ã‚»ãƒƒãƒˆã‚¢ãƒƒãƒ—ãŒå®Œäº†ã—ãŸã®ã§ã€Ruby on Railsã¨ã®æŽ¥ç¶šç¢ºç«‹ã‚’確èªã—ã¾ã™ã€‚ å‚考ページ Postgresql on Rails and OSX (Potential Energy) â– Railsã«PostgreSQL用ã®ã‚¢ãƒ€ãƒ—タを与ãˆã‚‹ アダプタã¯ï¼’種類ã‚るよã†ã§ã™ã€‚ã©ã¡ã‚‰ã‚‚gemコマンドã§ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã§ãã¾ã™ã€‚ é•ã„ã¯ã€ã‚ã‹ã‚Šã¾ã›ã‚“。。1ã¤ç›®ã®æ–¹æ³•ã¯ã€å¼•æ•°ã®ãƒ‘スを環境ã«åˆã‚ã›ã¦å¤‰æ›´ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã€‚ gem install postgres -- --with-pgsql-include-dir=/usr/local/pgsql/include --with-pgsql-lib-dir=/usr/local/pgsql/lib gem install postgres-pr çµæžœã§ã™ãŒã€1ã¤ç›®ã®æ–¹æ³•ã¯ãƒ‘スをã•
Performance Tuning PostgreSQL
Introduction PostgreSQL is the most advanced and flexible Open Source SQL database today. With this power and flexibility comes a problem. How do the PostgreSQL developers tune the default configuration for everyone? Unfortunately the answer is they can't. The problem is that every database is not only different in its design, but also its requirements. Some systems are used to log mountains of da
[ThinkIT] 第3回：トランザクションã®æ¯”較 (1/4) -at- 徹底比較!! PostgreSQL vs MySQL
医療DXã®ãƒ˜ãƒ³ãƒªãƒ¼ã®é–‹ç™ºãƒˆãƒƒãƒ—ã«ã‚¤ãƒ³ã‚¿ãƒ“ュー。モノリスã‹ã‚‰ãƒžã‚¤ã‚¯ãƒã‚µãƒ¼ãƒ“スã«å›žå¸°ã™ã‚‹èƒŒæ™¯ã¨ã¯ï¼Ÿ 1月5æ—¥ 6:01
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