SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function divide (alias x) (children 1)
     ExpressionList (children 2)
      Function toDecimal64 (children 1)
       ExpressionList (children 2)
        Identifier number
        Literal UInt64_5
      Literal UInt64_100
    Function roundDown (children 1)
     ExpressionList (children 2)
      Identifier x
      Literal Array_[UInt64_4, UInt64_5, UInt64_6]
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.numbers
   Literal UInt64_10