mariadb/include/rem0types.h

/************************************************************************
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 max index column
length + 1. Starting from 4.1.6, we set it to 3 * 256, so that one can
create a column prefix index on 255 characters of a TEXT field also in the
UTF-8 charset. Under MySQL, a UTF-8 character may take at most 3 bytes. */
#define REC_MAX_INDEX_COL_LEN	768

#endif