/************************************************************************ Record manager global types (c) 1994-1996 Innobase Oy Created 5/30/1994 Heikki Tuuri *************************************************************************/ #ifndef rem0types_h #define rem0types_h /* We define the physical record simply as an array of bytes */ typedef byte rec_t; /* Maximum values for various fields (for non-blob tuples) */ #define REC_MAX_N_FIELDS (1024 - 1) #define REC_MAX_HEAP_NO (2 * 8192 - 1) #define REC_MAX_N_OWNED (16 - 1) /* REC_MAX_INDEX_COL_LEN is measured in bytes and is the maximum indexed column length (or indexed prefix length). It is set to 3*256, so that one can create a column prefix index on 256 characters of a TEXT or VARCHAR column also in the UTF-8 charset. In that charset, a character may take at most 3 bytes. This constant MUST NOT BE CHANGED, or the compatibility of InnoDB data files would be at risk! */ #define REC_MAX_INDEX_COL_LEN 768 #endif