SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier dt64
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier dts64
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier dtms64
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function generateRandom (children 1)
       ExpressionList (children 1)
        Literal \'dt64 DateTime64(3, \\\'UTC\\\'), dts64 DateTime64(6, \\\'UTC\\\'), dtms64 DateTime64(6 ,\\\'UTC\\\')\'
   Literal UInt64_1