SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function toDateTime (alias dt) (children 1)
     ExpressionList (children 2)
      Literal \'2021-08-15 18:57:56\'
      Literal \'Asia/Shanghai\'
   ExpressionList (children 3)
    Identifier dt
    Function dateTimeToSnowflake (children 1)
     ExpressionList (children 1)
      Identifier dt
    Function materialize (children 1)
     ExpressionList (children 1)
      Function dateTimeToSnowflake (children 1)
       ExpressionList (children 1)
        Identifier dt