Explain EXPLAIN SYNTAX (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 1)
    ExpressionList (children 1)
     Function negate (children 1)
      ExpressionList (children 1)
       Function negate (children 1)
        ExpressionList (children 1)
         Literal Int64_-1