:-)<br clear="all">--------------------------------------------------<br>Best regards,<br>Zeeshan Mughal<br>Email: <a href="mailto:zeeshanmughal@ieee.org">zeeshanmughal@ieee.org</a><br>Web: <a href="http://www.zixan.info">http://www.zixan.info</a><br>
<br><br><div class="gmail_quote">On Mon, Jun 8, 2009 at 11:18 AM, Marc Delisle <span dir="ltr"><<a href="mailto:marc@infomarc.info">marc@infomarc.info</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Michal Èihaø a écrit :<br>
<div class="im">> Hi<br>
><br>
> Dne Fri, 05 Jun 2009 05:32:02 -0400<br>
> Marc Delisle <<a href="mailto:marc@infomarc.info">marc@infomarc.info</a>> napsal(a):<br>
><br>
>> Yes there are downsides for each alternative. Another downside for the<br>
>> EAV model is that at user login (session initialization) we need to read<br>
>> all the rows holding the user prefs for this user, instead of just one<br>
>> read if each option has its own column.<br>
><br>
> With index on login name, selecting several rows should be quite cheap.<br>
><br>
>> As mentionned in one of the links I gave, the EAV model also makes it<br>
>> difficult to code the possible choices for an option, for example into<br>
>> an ENUM.<br>
><br>
> Okay, I probably can live with either of solutions. Both have downsides<br>
> and advantages.<br>
<br>
</div>I guess it's up to Zeeshan to decide now.<br>
<div class="im"><br>
><br>
>> About upgrading, I expect Zeeshan to implement a feature to auto-create<br>
>> and auto-upgrade the table (which could be extended to all of our pmadb<br>
>> tables).<br>
><br>
> It should be coded with this in mind.<br>
<br>
<br>
<br>
<br>
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