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MySQL ±Û·Î¹ú »ç¿ëÀÚ º¯¼ö UDF ű×
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Áö¼ÓÀûÀÎ º¯¼ö¸¦ ÀúÀåÇÏ´Â MySQL È®ÀåÀÚÀÔ´Ï´Ù. MySQL Àü¿ª »ç¿ëÀÚ º¯¼ö UDF´Â ¿µ±¸ º¯¼ö¸¦ ÀúÀåÇÏ´Â MySQL È®ÀåÀÚÀÔ´Ï´Ù.ÀÌ °øÀ¯ ¶óÀ̺귯¸®´Â Áö¼ÓÀûÀÎ °øÀ¯ º¯¼ö¸¦ ¸Þ¸ð¸®¿¡ º¸°üÇϱâ À§ÇØ °£´ÜÇÑ »ç¿ëÀÚ ±â´ÉÀ» MySQL¿¡ Ãß°¡ÇÕ´Ï´Ù. ÀÌ·¯ÇÑ º¯¼ö¿Í ÇØ´ç °ªÀº ¸ðµç Ŭ¶óÀ̾ðÆ®¿¡¼ »ç¿ëÇÒ ¼ö ÀÖ½À´Ï´Ù. ¸ðµç µ¥ÀÌÅÍ´Â BLOB¸¦ Æ÷ÇÔÇÏ¿© ÀÌ·¯ÇÑ ¿µ±¸ º¯¼ö¿¡ ÀúÀåÇÒ ¼ö ÀÖ½À´Ï´Ù. ¾÷µ¥ÀÌÆ®°¡ ¿øÀÚ·ÂÀÌ°í ¸Þ¸ð¸® Å×ÀÌºíº¸´Ù ºü¸£°í Ä«¿îÅÍ ¹× ½ÃÄö½º¸¦ ó¸®ÇÏ´Â µ¥ ½±°í È¿À²ÀûÀÎ ¹æ¹ýÀÔ´Ï´Ù. ¼ø¼öÇÑ ¸Þ¸ð¸®°¡ »ç¿ë °¡´ÉÇÑ °æ¿ì¿¡¸¸ »ç¿ëÀÚ º¯¼ö¸¦ ÀúÀåÇÒ ¼ö ÀÖ½À´Ï´Ù. global_store (,) »õ·Î¿î °øÀ¯ Àü¿ª º¯¼öÀÔ´Ï´Ù. examples : mysql> do global_store ( "onlight_users", 42); mysql> do global_store ( "secret_key", "pajfuyfnd"); global_store () ÇÔ¼ö´Â ¿À·ù°¡ ¹ß»ýÇÏÁö ¾Ê´Â ÇÑ Ç×»ó 1À» ¹ÝȯÇÕ´Ï´Ù. ValueReading º¯¼öÀÇ °ªÀº global_get () ÇÔ¼öÀÇ ÀÛ¾÷ÀÔ´Ï´Ù. °ªÀÌ ¹ÝȯµÇ°Å³ª null°¡ º¯¼ö°¡ undefinedÀÔ´Ï´Ù. example : mySQL> select global_get ( "enlower_users;); 42MYSQL> serect_key = pxs¿¡¼ ID ¼±Åà global_get ( "secret_key"); 1 ´ÜÀÏ incommentsa ´ÜÀÏ ÇÔ¼ö È£ÃâÀº ÀÌÀü °ªÀ» Àаí, Á¤¼ö¸¦ Ãß°¡ÇÏ°í, »õ·Î¿î °ªÀ» º¯¼ö¿¡ ÀúÀåÇÒ ¼ö ÀÖ½À´Ï´Ù. ÇÔ¼ö´Â global_add (,)ÀÌ°í ¹Ýȯ °ªÀº º¯¼öÀÇ »õ·Î¿î °ªÀº Ç×»ó ¿øÀÚÀÔ´Ï´Ù. ±×´Â ÀÌÀü °¡Ä¡°¡ 18ÀÌ°í 1À» Ãß°¡Çϸé Ç×»ó 19.Example : mysql> do global_add ( "onlight_users", 1); mysql> global_add ¼±Åà ( "enlower_users", -4); º¯¼öÀÇ °ªÀ» ¼±ÅÃÇϽʽÿÀ. ¹®ÀÚ¿À̾ú½À´Ï´Ù. »õ °ªÀº ÁõºÐÀÔ´Ï´Ù. mysql> global_add¸¦ ¼±ÅÃÇϽʽÿÀ ( "secret_key", 12); Á¤ÀǵÇÁö ¾ÊÀº º¯¼ö¿¡ °ªÀ» 12Adding null.a Æí¸®ÇÑ º¯ÇüÀº global_addp (,)ÀÔ´Ï´Ù. global_addp ()´Â global_add ()¿Í À¯»çÇÏÁö¸¸ »õ·Î¿î one.Example ´ë½Å º¯¼öÀÇ ÀÌÀü °ªÀ» ¹ÝȯÇÕ´Ï´Ù. mysql> do global_set ( "xxx", 10); mySQL> global_addp ( "xxx", 1); 10mysql > global_addp ¼±Åà ( "xxx", 1); 11 minstallation : ´ëºÎºÐÀÇ ½Ã½ºÅÛ¿¡¼ ¶óÀ̺귯¸®¸¦ ÄÄÆÄÀÏÇÏ°í ¼³Ä¡ÇÏ´Â °ÍÀº ÀÔ·ÂÇÏ´Â °Í¸¸ Å °£´ÜÇؾßÇÕ´Ï´Ù (·çÆ®·Î) : °øÀ¯ ¶óÀ̺귯¸®°¡ /usr/local/lib/udf_global_user_variables.soif·Î ¼³Ä¡µË´Ï´Ù. MySQL ¼³Ä¡ÀÇ ±âº» µð·ºÅ丮´Â / usr / localÀÌ ¾Æ´Õ´Ï´Ù : MakeAnd ±×·± ´ÙÀ½ udf_global_user_variables.so¸¦ ½Ã½ºÅÛÀÇ UDF¿¡ ¿Ã¹Ù¸¥ À§Ä¡·Î º¹»çÇÕ´Ï´Ù. º¯¼öÀÇ À̸§Àº ´ÙÀ½À¸·Î Á¦Çѵ˴ϴÙ. 256 ¹ÙÀÌÆ®. ÇØ´ç Á¦ÇÑÀÌ Æ¯Á¤ ÀÀ¿ë ÇÁ·Î±×·¥ÀÇ °æ¿ì ³Ê¹« ³· À¸¸é .c ÆÄÀÏ À§¿¡ max_name_length º¯¼ö¸¦ ÆíÁýÇÏ°í ´Ù½Ã ¼³Ä¡ÇϽʽÿÀ. º¯¼ö À̸§¿¡´Â ¹ÙÀ̳ʸ® ¹®ÀÚ°¡ Æ÷Ç﵃ ¼ö ÀÖ½À´Ï´Ù. °ªÀº 65536 ¹ÙÀÌÆ®·Î Á¦Çѵ˴ϴÙ. ÇØ´ç Á¦ÇÑÀÌ ³Ê¹« ³· À¸¸é max_value_length º¯¼ö¸¦ ÆíÁýÇÏ°í ´Ù½Ã ¼³Ä¡ÇϽʽÿÀ. ÀÌ ¸±¸®½º¿¡¼´Â »õ·Î¿î ±â´É : ¡¤ global_store ()´Â ÀÌÁ¦ global_set ()¿¡ ´ëÇÑ º°ÄªÀÔ´Ï´Ù. ¡¤ SQL ÅÛÇø´Àº ÀÌÁ¦ »ç¿ë °¡´ÉÇÑ ¸ðµç ±â´ÉÀ»·ÎµåÇÕ´Ï´Ù. ¡¤ ¹®¼°¡ ¾÷µ¥ÀÌÆ®µÇ¾ú½À´Ï´Ù.
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