vb.org Archive - MySQL and multiple likes

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- - MySQL and multiple likes (https://vborg.vbsupport.ru/showthread.php?t=61597)

filburt1

02-15-2004 05:08 PM

MySQL and multiple likes

Observe:

PHP Code:


		
			
$result = $DB_site->query("SELECT userid, username, vbms_alias,

        IF(options & " . $_USEROPTIONS['emailonpm'] . ", 1, 0) AS emailonpm

        FROM " . TABLE_PREFIX . "user

        WHERE vbms_alias != \"\" AND LCASE(vbms_alias) NOT IN ($bannedaliases)");

Note the NOT IN portion. I want to match against a series of LIKE matches ("%alias1%", "%alias2%", etc.). I can figure out how to match against a single alias with LIKE or a group of aliases exactly with IN, but not both. Ideas?

Dean C

02-15-2004 06:56 PM

Not sure entirely what you're trying to do but have you looked into mysql's regexp capabilities - that may do it for you :)

filburt1

02-15-2004 08:42 PM

Quote:

Originally Posted by Dean C

Not sure entirely what you're trying to do but have you looked into mysql's regexp capabilities - that may do it for you :)

I'm trying to compare a single column to an array of values with a single query. That is, let's say MySQL is looking at the column "alias" with the value "nobody". I want it to check against "noreply", "webmaster", "administrator", and "nobody", and if any of those are found as a substring within the alias, it will skip the row.

A regex will work but checking against an array is still the issue.

Dean C

02-16-2004 09:29 AM

MySQL has a built in substr function :)

Someone once showed me how it can be used as a search feature but i'm not entirely sure how to use it as a condition. I know it definately can be though. You could split you array into individual strings such as ' AND SUBSTR('ll',1)' or however it's used and then put $conditions at the end of your SQL query :)

With me?

Edit: http://www.mysql.com/documentation/m...61/content.htm

filburt1

02-16-2004 12:54 PM

Quote:

Originally Posted by Dean C

Yes, I get what you're saying...it's just a very unclean solution IMO.

filburt1

02-22-2004 02:56 PM

So no other ideas, then?

Some contextual code if there's still confusion:

PHP Code:


		
			
// find out banned aliases and make them unroutable

debugecho("Caching banned aliases...");

$bannedaliases = explode(" ", $vboptions['vbms_bannedaliases']);

foreach ($bannedaliases as $key => $value)

{

    $bannedaliasesp[$key] = addslashes(strtolower($value));

}

$bannedaliases = implode("%\", \"%", $bannedaliases);

$bannedaliases = "\"" . $bannedaliases . "\"";



// ----------------------------------------------------------------------------



// cache users

/**

 * @todo remove username from query (only used for debugging)

 */

debugecho("Caching users...");

$result = $DB_site->query("SELECT userid, username, vbms_alias, email,

        IF(options & " . $_USEROPTIONS['emailonpm'] . ", 1, 0) AS emailonpm

        FROM " . TABLE_PREFIX . "user

        WHERE vbms_alias != \"\" AND LCASE(vbms_alias) NOT IN ($bannedaliases)");

Natch

02-22-2004 08:36 PM

MySQL is powerful, but not PHP - your best bet is Mist/Dean's solution to build a list of banned aliases from your array - makes for a large query (number of characters) but it's really a quick query for SQL to run ...

filburt1

02-22-2004 09:22 PM

I ended up using a regular expression, delimiting everything with pipe characters.

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