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ÓÃmysqlÔ´Âë½øÐÐSQL½âÎö
MysqlÊÇͨ¹ýyacc½øÐÐSQLÓï¾ä½âÎöµÄ£¬ÕâÀï½éÉÜÒ»ÏÂÈçºÎʹÓÃmysqlµÄÔ´Âë½øÐÐSQLÓï¾ä½âÎö¡£ÓÉÓÚMysqlµÄÔ´´úÂë×¢ÊͱȽÏÉÙ£¬¶øÇÒȱÉÙ×ÊÁÏ£¬ËùÓÐЩµØ·½Ñо¿²»¹»ÉîÈë¡£
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enum enum_field_types { MYSQL_TYPE_DECIMAL, MYSQL_TYPE_TINY,
            MYSQL_TYPE_SHORT,  MYSQL_TYPE_LONG,
            MYSQL_TYPE_FLOAT,  MYSQL_TYPE_DOUBLE,
            MYSQL_TYPE_NULL,   MYSQL_TYPE_TIMESTAMP,
            MYSQL_TYPE_LONGLONG,MYSQL_TYPE_INT24,
            MYSQL_TYPE_DATE,   MYSQL_TYPE_TIME,
            MYSQL_TYPE_DATETIME, MYSQL_TYPE_YEAR,
            MYSQL_TYPE_NEWDATE,
            MYSQL_TYPE_ENUM=247,
            MYSQL_TYPE_SET=248,
            MYSQL_TYPE_TINY_BLOB=249,
            MYSQL_TYPE_MEDIUM_BLOB=250,
           MYSQL_TYPE_LONG_BLOB=251,
            MYSQL_TYPE_BLOB=252,
            MYSQL_TYPE_VAR_STRING=253,
            MYSQL_TYPE_STRING=254,
            MYSQL_TYPE_GEOMETRY=255
};
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