Author: wyoung
Date: Tue May 18 04:12:44 2010
New Revision: 2643
URL: http://svn.gna.org/viewcvs/mysqlpp?rev=2643&view=rev
Log:
Added quadratic equation for ssqls.h size
Modified:
trunk/doc/userman/ssqls.dbx
Modified: trunk/doc/userman/ssqls.dbx
URL:
http://svn.gna.org/viewcvs/mysqlpp/trunk/doc/userman/ssqls.dbx?rev=2643&r1=2642&r2=2643&view=diff
==============================================================================
--- trunk/doc/userman/ssqls.dbx (original)
+++ trunk/doc/userman/ssqls.dbx Tue May 18 04:12:44 2010
@@ -794,14 +794,22 @@
<para>The first configurable value sets the maximum number of
data members allowed in an SSQLS. It’s 25 out of the box,
- set by the <varname>$max_data_members</varname> variable at
- the top of <filename>ssqls.pl</filename>. Beware, making this
- value larger increases the size of <filename>ssqls.h</filename>
- exponentially; this will increase compile time, and can even make
- the file uncompilable due to compiler limits. Before you increase
- this value, take a good, hard look at your database schema and ask
- if it’s really the best design. Almost always, having so
- many columns is a sign that you need to refactor the table.</para>
+ set by the <varname>$max_data_members</varname> variable at the
+ top of <filename>ssqls.pl</filename>. Beware, making this value
+ larger increases the size of <filename>ssqls.h</filename>
+ quadratically<footnote>
+ <para>
+ If you’re curious:
+ <phrase role="math">
+ LOC = 18.5x<superscript>2</superscript> + 454.5x + 196.4
+ </phrase>
+ </para>
+ </footnote>; this will increase compile time, and can even
+ make the file uncompilable due to compiler limits. Before you
+ increase this value, take a good, hard look at your database schema
+ and ask if it’s really the best design. Almost always,
+ having so many columns is a sign that you need to refactor the
+ table.</para>
<para>The second configurable is the default floating point
precision used for comparison. As described above (<xref
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