Re: Uploading a file list of emails

 
From: "Mariano Absatz" <el.baby@PROTECTED>
Date: October 10th 2006
On 10 Oct 2006 02:23:31 -0000, Dada Mail (Justin Simoni) <dada@PROTECTED> wrote:

The other problem is that it just takes a long time to sort the email
addresses into ones that are valid, not subscribed, invalid,
subscribed, blacklisted, etc. For the PlainText backend, I don't know
what kind of optimization I can do. There's probably more room for
optimization on the SQL backend, but my SQL-foo currently isn't the
best - although I may get around to it soon. Currently, there's at
least - at the very least, one SQL statement per email address you're
attempting to subscribe - if you have a list of 5,000, that's 5,000
SQL statements run - which isn't optimized at all. I guess the answer
to query the SQL table to see if a list of email addresses are
subscribed to a list is something like:

        SELECT email in subscribers where email = ' user1@PROTECTED' or
'user2@PROTECTED';

And just keep "or"ing for thousands of addresses.

I'm no sql wizard, but maybe:
    SELECT email FROM subscribers WHERE email IN
        ('user1@PROTECTED',
         ' user2@PROTECTED',
         ...
         'userN@PROTECTED');
is more efficient?


--
Mariano Absatz - El Baby
el (dot) baby (AT) gmail (dot) com
el (punto) baby (ARROBA:@) gmail (punto) com

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