SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Identifier a
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Function sipHash64 (alias a) (children 1)
            ExpressionList (children 1)
             Identifier a
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier optimize_sorting
   Function notEquals (children 1)
    ExpressionList (children 2)
     Identifier a
     Literal UInt64_0
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier a
