SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 1)
    Identifier number
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 2)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Identifier zero (alias number)
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function remote (children 1)
              ExpressionList (children 2)
               Literal \'127.0.0.2\'
               Identifier system.zeros
         SelectQuery (children 2)
          ExpressionList (children 1)
           Function plus (children 1)
            ExpressionList (children 2)
             Identifier number
             Function sleep (children 1)
              ExpressionList (children 1)
               Literal Float64_0.5
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             TableIdentifier system.numbers
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier number
     Literal UInt64_1
   Literal UInt64_1
   Set