SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 6)
    Function materialize (alias x) (children 1)
     ExpressionList (children 1)
      Function toDate (children 1)
       ExpressionList (children 1)
        Literal UInt64_0
    Function toDecimal128 (alias y) (children 1)
     ExpressionList (children 2)
      Literal UInt64_1
      Literal UInt64_0
    Function if (alias z) (children 1)
     ExpressionList (children 3)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier x
        Literal UInt64_0
      Identifier x
      Identifier y
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier x
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier y
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier z