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recno
Langue: ja
Version: 1994-08-18 (openSuse - 09/10/07)
Section: 3 (Bibliothèques de fonctions)
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recno - ¥ì¥³¡¼¥ÉÈÖ¹æ¥Ç¡¼¥¿¥Ù¡¼¥¹¤Ø¤Î¥¢¥¯¥»¥¹¥á¥½¥Ã¥É½ñ¼°
#include <sys/types.h> #include <db.h>
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typedef struct { u_long flags; u_int cachesize; u_int psize; int lorder; size_t reclen; u_char bval; char *bfname; } RECNOINFO;
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- flags
- flag ¤ÎÃÍ¤Ï °Ê²¼¤ÎÃͤΤ¤¤º¤ì¤«¤«¡¢¤³¤ì¤é¤ÎÏÀÍýϤǻØÄꤵ¤ì¤ë¡£
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- R_FIXEDLEN
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- R_NOKEY
- dbopen ¤Ç»ØÄꤵ¤ì¤¿¥¤¥ó¥¿¡¼¥Õ¥§¥¤¥¹¤Ç¤Ï¡¢¥·¡¼¥±¥ó¥·¥ã¥ë¤Ê¥ì¥³¡¼¥É¼èÆÀ¤Ï ¸Æ¤Ó½Ð¤·¥¡¼¤È¥Ç¡¼¥¿¹½Â¤ÂΤÎξÊý¤òËä¤á¤Æ¤¤¤¯¡£ R_NOKEY ¥Õ¥é¥°¤¬»ØÄꤵ¤ì¤Æ¤¤¤ë¤È¡¢¥¡¼¹½Â¤ÂΤòËä¤á¤ë¤Î¤Ë cursor ¥ë¡¼¥Á¥ó¤òɬÍפȤ·¤Ê¤¤¡£ ¤³¤ì¤òÍѤ¤¤ì¤Ð¡¢¥¢¥×¥ê¥±¡¼¥·¥ç¥ó¤¬¥Õ¥¡¥¤¥ë¤Î½ª¤ê¤ÎÊý¤ò¼èÆÀ¤¹¤ëºÝ¤Ë¡¢ ¤½¤ÎÅÓÃæ¤Î¥ì¥³¡¼¥É¤òÆɤޤʤ¯¤Æ¤âºÑ¤à»ö¤Ë¤Ê¤ë¡£
- R_SNAPSHOT
- ¤³¤Î¥Õ¥é¥°¤ò»ØÄꤹ¤ë¤È¡¢ dbopen ¤Î¸Æ¤Ó½Ð¤·¤ÎºÝ¡¢ ¥ª¥ê¥¸¥Ê¥ë¥Õ¥¡¥¤¥ë¤«¤éÊѹ¹¤µ¤ì¤Æ¤¤¤Ê¤¤¥ì¥³¡¼¥É¤òÆɤàÂå¤ï¤ê¤Ë¡¢ ¥Õ¥¡¥¤¥ë¤Î snapshot ¤òÍѤ¤¤ë¡£
-
- cachesize
- ÁÛÄꤵ¤ì¤ë¥á¥â¥ê¥¥ã¥Ã¥·¥å¤ÎºÇÂ祵¥¤¥º (¥Ð¥¤¥Èñ°Ì)¡£ ¤³¤ÎÃÍ¤Ï ¤¢¤¯¤Þ¤Ç »²¹Í¤Ç¤¢¤ê¡¢¥¢¥¯¥»¥¹¥á¥½¥Ã¥É¤Ï¤³¤ÎÃͤò±Û¤¨¤¿¥á¥â¥ê¤Î ³ä¤êÅö¤Æ¤ËÀ®¸ù¤¹¤ë¤³¤È¤â¤¢¤ë¡£ cachesize ¤¬ 0 (¤¢¤ë¤¤¤Ï»ØÄꤵ¤ì¤Æ¤¤¤Ê¤¤) ¤Î¾ì¹ç¡¢¥Ç¥Õ¥©¥ë¥È¤Î¥¥ã¥Ã¥·¥å¤¬»È¤ï¤ì¤ë¡£
- psize
- recno ¥¢¥¯¥»¥¹¥á¥½¥Ã¥É¤Ï¡¢¼«¿È¤Î¥ì¥³¡¼¥É¤Î¥³¥Ô¡¼¤ò¥á¥â¥êÆâÉô¤Ë btree ¤ÇÊݸ¤·¤Æ¤¤¤ë¡£ ¤³¤ÎÃͤϡ¢¤½¤Î btree Ãæ¤Î¥Î¡¼¥É¤ËÂФ·¤ÆÍѤ¤¤é¤ì¤ë ¥Ú¡¼¥¸¥µ¥¤¥º (¥Ð¥¤¥Èñ°Ì) ¤Ç¤¢¤ë¡£ psize ¤¬ 0 (¤¢¤ë¤¤¤Ï»ØÄꤵ¤ì¤Æ¤¤¤Ê¤¤) ¤Î¾ì¹ç¡¢ ¥Õ¥¡¥¤¥ë¥·¥¹¥Æ¥à¤Î I/O ¥Ö¥í¥Ã¥¯¥µ¥¤¥º¤ò´ð¤Ë¤·¤Æ ¥Ú¡¼¥¸¥µ¥¤¥º¤¬·è¤á¤é¤ì¤ë¡£ ¾ÜºÙ¤Ï btree(3) ¤ò»²¾È¡£
- lorder
- ¥Ç¡¼¥¿¥Ù¡¼¥¹¤Ë³ÊǼ¤µ¤ì¤Æ¤¤¤ë¥á¥¿¥Ç¡¼¥¿¤ÎÀ°¿ôÃͤΥХ¤¥È¥ª¡¼¥À¡¼¡£ ¤³¤Î¿ô»ú¤Ï¡¢½ç½ø¤òÀ°¿ô¤Çɽ¤·¤¿¤â¤Î¤Ç¤¢¤ë¡£ Î㤨¤Ð¥Ó¥Ã¥°¥¨¥ó¥Ç¥£¥¢¥ó¤Ê¤é¡¢¤³¤Î¿ôÃÍ¤Ï 4,321 ¤È¤Ê¤ë¡£ lorder ¤¬ 0 (»ØÄꤵ¤ì¤Æ¤¤¤Ê¤¤) ¤Î¾ì¹ç¡¢¸½ºß¤Î¥Û¥¹¥È ¤Ç»È¤ï¤ì¤Æ¤¤¤ë¥Ð¥¤¥È¥ª¡¼¥À¡¼¤¬»È¤ï¤ì¤ë¡£
- reclen
- ¸ÇÄê¥ì¥³¡¼¥ÉŤÎŤµ¡£
- bval
- ²ÄÊѥ쥳¡¼¥ÉŤˤª¤¤¤Æ¡¢ ¥ì¥³¡¼¥É¤Î½ª¤ê¤ò¼¨¤¹¶èÀÚ¤ê¥Ð¥¤¥È (¶èÀÚ¤êʸ»ú) ¤Ç¤¢¤ë¡£ ¸ÇÄê¥ì¥³¡¼¥ÉŤǤÏËä¤áʸ»ú¤È¤·¤Æ»È¤ï¤ì¤ë¡£ Ãͤ¬»ØÄꤵ¤ì¤Æ¤¤¤Ê¤¤¤È¡¢ ²ÄÊѥ쥳¡¼¥ÉĹ¤Î¥ì¥³¡¼¥É¤Î½ª¤ê¤Ë¤Ï²þ¹Ô (``\n'') ¤¬»È¤ï¤ì¤ë¡£ ¸ÇÄê¥ì¥³¡¼¥ÉĹ¤Î¥ì¥³¡¼¥É¤Ï¶õÇò (space) ¤ÇËä¤á¤é¤ì¤ë¡£
- bfname
- recno ¥¢¥¯¥»¥¹¥á¥½¥Ã¥É¤Ï¡¢ ¼«¿È¤Î¥ì¥³¡¼¥É¤Î¥³¥Ô¡¼¤ò¥á¥â¥êÆâÉô¤Ç btree ¤ËÊݸ¤·¤Æ¤¤¤ë¡£ bfname ¤¬ NULL ¤Ç¤Ê¤¤¾ì¹ç¡¢¤³¤ì¤Ï btree ¥Õ¥¡¥¤¥ë̾ (btree ¥Õ¥¡¥¤¥ë¤ò dbopen ¤¹¤ë»þ¤Ë»ØÄꤹ¤ë¥Õ¥¡¥¤¥ë̾) ¤ò»ØÄꤹ¤ë¡£
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btree(3) dbopen(3), hash(3), mpool(3)Document Processing in a Relational Database System, Michael Stonebraker, Heidi Stettner, Joseph Kalash, Antonin Guttman, Nadene Lynn, Memorandum No. UCB/ERL M82/32, May 1982.
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