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Clarifications to the datatype3.html document. (CVS 3657) 

FossilOrigin-Name: 4692a85edbe27d512f1830b8fb3e2b05b92a0cb5
This commit is contained in:
drh 2007-02-23 14:20:38 +00:00
parent de087bd5ed
commit b0988dead7
3 changed files with 15 additions and 12 deletions
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manifest
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@ -1,5 +1,5 @@
C Clarify\sthe\sdocumentation\son\show\scomparisons\soccur\sin\san\sIN\soperator.\r\nFix\sthe\scomparison\soperators\swhen\sboth\ssides\sof\san\sIN\soperator\sare\r\nexpressions\s(ticket\s#2248).\r\nChanges\sto\smain.mk\sfor\sadding\sFTS2\sinto\sthe\sstandard\sbuild\salso\r\ngot\smixed\sin\swith\sthis\scheck-in\sby\smistake.\s(CVS\s3656)
D 2007-02-23T03:00:45
C Clarifications\sto\sthe\sdatatype3.html\sdocument.\s(CVS\s3657)
D 2007-02-23T14:20:38
F Makefile.in 1fe3d0b46e40fd684e1e61f8e8056cefed16de9f
F Makefile.linux-gcc 2d8574d1ba75f129aba2019f0b959db380a90935
F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@ -396,7 +396,7 @@ F www/conflict.tcl cdd0f4b59b0ba6d61f67e6a38f3ae45853bacb30
F www/copyright-release.html 294e011760c439c44951a6bfecd4c81a1ae359e8
F www/copyright-release.pdf cfca3558fc97095e57c6117d08f1f5b80d95125a
F www/copyright.tcl 58b9586cac0d5914387cfc170bfd80f999dde469
F www/datatype3.tcl 61baf9328eaba3d20eb7d8351a1eacfced8d4383
F www/datatype3.tcl eca9badcfe2a898d64ebda88e804eb6ac7c4626c
F www/datatypes.tcl 7c786d2e8ff434346764534ec015966d17efce60
F www/different.tcl 8b76ae88bf73e38097b7936e198df4f89baf587c
F www/direct1b.gif 32b48b764244817b6b591898dc52a04299a7b8a7
@ -432,7 +432,7 @@ F www/tclsqlite.tcl bb0d1357328a42b1993d78573e587c6dcbc964b9
F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
F www/version3.tcl 890248cf7b70e60c383b0e84d77d5132b3ead42b
F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
P 16cb00adeb3b68220ba2567b86b230bbbf2a0330
R 8a25a5e663e2db06c8559f7592894f39
P da81725ca1cd894b3f2d734767e10cc0dc329566
R e9a87dbf4aaa39ef37829fb50c058efb
U drh
Z fea7b5a99e3b60f2d1d6571464477514
Z be59c6c32a9cdacaed5c099c4e34bcba

2
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da81725ca1cd894b3f2d734767e10cc0dc329566
4692a85edbe27d512f1830b8fb3e2b05b92a0cb5

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www/datatype3.tcl
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set rcsid {$Id: datatype3.tcl,v 1.15 2007/02/23 03:00:46 drh Exp $}
set rcsid {$Id: datatype3.tcl,v 1.16 2007/02/23 14:20:38 drh Exp $}
source common.tcl
header {Datatypes In SQLite Version 3}
puts {
@ -167,6 +167,7 @@ INSERT INTO t1 VALUES(500.0, 500.0, 500.0, 500.0);
</PRE>
</blockquote>
<a name="comparisons">
<h3>3. Comparison Expressions</h3>
<P>Like SQLite version 2, version 3
@ -196,16 +197,18 @@ two values being compared, according to the following rules:</P>
classes (INTEGER and REAL) and TEXT before performing a comparison.
For binary comparisons, this is done in the cases enumerated below.
The term "expression" used in the bullet points below means any
SQL scalar expression or literal other than a column value.</P>
SQL scalar expression or literal other than a column value. Note that
if X and Y.Z are a column names, then +X and +Y.Z are considered
expressions.</P>
<UL>
<LI><P>When a column value is compared to the result of an
expression, the affinity of the column is applied to the result of
the expression before the comparison takes place.</P>
<LI><P>When two column values are compared, if one column has
INTEGER or NUMERIC affinity and the other does not, the NUMERIC
affinity is applied to any values with storage class TEXT extracted
from the non-NUMERIC column.</P>
INTEGER or REAL or NUMERIC affinity and the other does not,
then NUMERIC affinity is applied to any values with storage
class TEXT extracted from the non-NUMERIC column.</P>
<LI><P>When the results of two expressions are compared, no
conversions occur. The results are compared as is. If a string