Drizzled Public API Documentation

rem0types.h
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00001 /*****************************************************************************
00002 
00003 Copyright (C) 1994, 2009, Innobase Oy. All Rights Reserved.
00004 
00005 This program is free software; you can redistribute it and/or modify it under
00006 the terms of the GNU General Public License as published by the Free Software
00007 Foundation; version 2 of the License.
00008 
00009 This program is distributed in the hope that it will be useful, but WITHOUT
00010 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
00011 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
00012 
00013 You should have received a copy of the GNU General Public License along with
00014 this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
00015 St, Fifth Floor, Boston, MA 02110-1301 USA
00016 
00017 *****************************************************************************/
00018 
00019 /********************************************************************/
00026 #pragma once
00027 #ifndef rem0types_h
00028 #define rem0types_h
00029 
00030 /* We define the physical record simply as an array of bytes */
00031 typedef byte  rec_t;
00032 
00033 /* Maximum values for various fields (for non-blob tuples) */
00034 #define REC_MAX_N_FIELDS  (1024 - 1)
00035 #define REC_MAX_HEAP_NO   (2 * 8192 - 1)
00036 #define REC_MAX_N_OWNED   (16 - 1)
00037 
00038 /* REC_MAX_INDEX_COL_LEN is measured in bytes and is the maximum
00039 indexed column length (or indexed prefix length). It is set to 3*256,
00040 so that one can create a column prefix index on 256 characters of a
00041 TEXT or VARCHAR column also in the UTF-8 charset. In that charset,
00042 a character may take at most 3 bytes.
00043 This constant MUST NOT BE CHANGED, or the compatibility of InnoDB data
00044 files would be at risk! */
00045 #define REC_MAX_INDEX_COL_LEN 1024
00046 
00047 #endif