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Overview
Comment:Fix typos in file format documentation. Ticket #505. (CVS 1121)
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SHA1: 4eef93814f4a26de4a088c464545443547281abd
User & Date: drh 2003-11-25 23:48:57.000
Context
2003-11-27
00:48
Disallow temporary indices on persistent tables. (CVS 1122) (check-in: 72bf73b2c1 user: drh tags: trunk)
2003-11-25
23:48
Fix typos in file format documentation. Ticket #505. (CVS 1121) (check-in: 4eef93814f user: drh tags: trunk)
2003-11-24
23:11
Fix typo in file format documentation. Ticket #502. (CVS 1120) (check-in: 72f3e7c2b0 user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to www/fileformat.tcl. 
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#
# Run this script to generated a fileformat.html output file
#
set rcsid {$Id: fileformat.tcl,v 1.10 2003/11/24 23:11:08 drh Exp $}

puts {<html>
<head>
  <title>SQLite Database File Format</title>
</head>
<body bgcolor="white">
<h1 align="center">




|








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#
# Run this script to generated a fileformat.html output file
#
set rcsid {$Id: fileformat.tcl,v 1.11 2003/11/25 23:48:57 drh Exp $}

puts {<html>
<head>
  <title>SQLite Database File Format</title>
</head>
<body bgcolor="white">
<h1 align="center">
︙︙
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Entry 0.  Bytes 4 and 5 of the header point to Cell 0.  Cell 0 then
points to Cell 1 which contains Ptr 1 and Entry 1.  And so forth.
Cells vary in size.  Every cell has a 12-byte header and at least 4
bytes of payload space.  Space is allocated to payload in increments
of 4 bytes.  Thus the minimum size of a cell is 16 bytes and up to
63 cells can fit on a single page.  The size of a cell is always a multiple
of 4 bytes.
A cell can have up to 238 byte of payload space.  If
the payload is more than 238 bytes, then an addition 4 point page
number is appended to the cell which is the page number of the first
overflow page containing the additional payload.  The maximum size
of a cell is thus 254 bytes, meaning that a least 4 cells can fit into
the 1016 bytes of space available on a b-tree page.
An average cell is usually around 52 to 100 bytes in size with about
10 or 20 cells to a page.
</p>








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Entry 0.  Bytes 4 and 5 of the header point to Cell 0.  Cell 0 then
points to Cell 1 which contains Ptr 1 and Entry 1.  And so forth.
Cells vary in size.  Every cell has a 12-byte header and at least 4
bytes of payload space.  Space is allocated to payload in increments
of 4 bytes.  Thus the minimum size of a cell is 16 bytes and up to
63 cells can fit on a single page.  The size of a cell is always a multiple
of 4 bytes.
A cell can have up to 238 bytes of payload space.  If
the payload is more than 238 bytes, then an additional 4 byte page
number is appended to the cell which is the page number of the first
overflow page containing the additional payload.  The maximum size
of a cell is thus 254 bytes, meaning that a least 4 cells can fit into
the 1016 bytes of space available on a b-tree page.
An average cell is usually around 52 to 100 bytes in size with about
10 or 20 cells to a page.
</p>
︙︙