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Overview
Comment:Fix a typo on the key-encoding documentation.
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SHA1: b1ae0ca8c3f93cb92c78d76f2c25cc916174f7f0
User & Date: drh 2013-01-20 02:38:46.109
Context
2013-01-20
02:52
Fix typos in the VARINT documentation. check-in: eccdf70b22 user: drh tags: trunk
02:38
Fix a typo on the key-encoding documentation. check-in: b1ae0ca8c3 user: drh tags: trunk
00:07
Enable the AUTOINCREMENT feature. check-in: 5442b20bf6 user: drh tags: trunk
Changes
Unified Diff Ignore Whitespace Patch
Changes to www/key_encoding.wiki.
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If the numeric value is a positive infinity then the encoding is a single
byte of 0x23.  Every other numeric value encoding begins with a smaller
byte, ensuring that positive infinity always sorts last among numeric
values.  0x0d is also smaller than 0x0e, the initial byte of a text value,
ensuring that every numeric value sorts before every text value.

If the numeric value is exactly zero then then is encoded is a single
byte of 0x15.  Finite negative values will have initial bytes of 0x08
through 0x14 and finite positive values will have initial bytes of 0x16
through 0x22.

For all values, we compute a mantissa M and an exponent E.  The mantissa
is a base-100 representation of the value.  The exponent E determines
where to put the decimal point.








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88
89
90
91
92
93
94
95
96
97
98
99
100
101
102


If the numeric value is a positive infinity then the encoding is a single
byte of 0x23.  Every other numeric value encoding begins with a smaller
byte, ensuring that positive infinity always sorts last among numeric
values.  0x0d is also smaller than 0x0e, the initial byte of a text value,
ensuring that every numeric value sorts before every text value.

If the numeric value is exactly zero then it is encoded as a single
byte of 0x15.  Finite negative values will have initial bytes of 0x08
through 0x14 and finite positive values will have initial bytes of 0x16
through 0x22.

For all values, we compute a mantissa M and an exponent E.  The mantissa
is a base-100 representation of the value.  The exponent E determines
where to put the decimal point.
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