SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function caseWithExpression (alias f1) (children 1)
     ExpressionList (children 4)
      Literal NULL
      Function materialize (children 1)
       ExpressionList (children 1)
        Literal NULL
      Literal NULL
      Literal NULL
    Function if (alias f2) (children 1)
     ExpressionList (children 3)
      Literal NULL
      Function toDateTimeOrZero (children 1)
       ExpressionList (children 1)
        Literal NULL
      Literal NULL
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_1
