You definately have a problem with your HERE doc syntax. Your quoting is screwed up, there's no terminating semicolon on the first line of the HERE, and you shouldn't have a close-quote after the ending token. Furthermore, the closing token should be alone on its line (the semicolon screws it up). I'd be surprised if this code compiles. Are these just typos in typing your question? Also, it's not clear to me exactly, but it looks like you're trying to create the following system command:
/usr/bin/blah
$variable is the value from DB.
$variable is less than $threshold
So you've got embeded newlines in your invocation of the command, and unquoted barewords. What exactly do you want your command to look like when it gets passed to the operating system?
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