SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 5)
    Literal \'\'
    Literal Array_[\'\\0\']
    Function array (children 1)
     ExpressionList
    Function singleValueOrNull (children 1)
     ExpressionList (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Literal \'\\0\'
    Literal Array_[\'\']
