It appears to me that you are only passing 2 refs to the sub. 
sub foo{
  my ($query_ref, $session_ref) = @_;
}

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These refs should be references to hash tables.

In general, passing 10 parameters to a sub is not a good idea. Better is reference to a hash.

In reply to Re: Using Shift with Parameters in a subroutine by Marshall
in thread Using Shift with Parameters in a subroutine by perlron

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