SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function toStartOfQuarter (children 1)
     ExpressionList (children 1)
      Function toDateTime64 (children 1)
       ExpressionList (children 3)
        Literal \'1990-01-04 12:14:12\'
        Literal UInt64_0
        Literal \'UTC\'