摘要：
typedef struct st_key { uint key_length; /* Tot length of key */ ulong flags; /* dupp key and pack flags */ uint key_parts; /* How many ke... 阅读全文
摘要：
typedef struct keyuse_t { TABLE *table; Item *val; /** equality condition is on *cond_guard == FALSE equality condition is off NULL - Otherwise (the sourc... 阅读全文