SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function conv (children 1)
     ExpressionList (children 3)
      Identifier number
      Literal UInt64_10
      Literal UInt64_2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.numbers
   Function less (children 1)
    ExpressionList (children 2)
     Identifier number
     Literal UInt64_8
