SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Literal \'before epoch 2:\'
    Function to_utc_timestamp (children 1)
     ExpressionList (children 2)
      Function toDateTime (children 1)
       ExpressionList (children 1)
        Literal \'1969-01-01 00:00:00\'
      Literal \'UTC\'
    Function from_utc_timestamp (children 1)
     ExpressionList (children 2)
      Function toDateTime (children 1)
       ExpressionList (children 1)
        Literal \'1969-01-01 00:00:00\'
      Literal \'UTC\'
   Set
