[mythtv-users] Boolean custom recordings in mythweb

David Brodbeck gull at gull.us
Wed Sep 26 21:09:04 UTC 2007


On Sep 26, 2007, at 1:25 PM, Drew Tomlinson wrote:
> Wouldn't the missing AND have to be an OR?
>
> program.title LIKE "%MotoGP%" AND (program.title NOT LIKE "%125%" OR
> program.title NOT LIKE "%250%")

Nope.  If you do it that way, it will be recorded unless it contains  
*both* 125 and 250.

Remember, an AND becomes the equivalent of a negated OR when you  
negate the two tests.  In other words:

A AND ((NOT B) AND (NOT C))

is the same thing as:

A AND NOT (B OR C)

Write out a truth table for the different possibilities of B and C  
and you'll see why.



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