SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Function map (alias m) (children 1)
     ExpressionList (children 4)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'2020-10-10\'
        Literal \'Date\'
      Literal \'v1\'
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'2020-10-11\'
        Literal \'Date\'
      Literal \'v2\'
    Function toJSONString (alias s) (children 1)
     ExpressionList (children 1)
      Identifier m
    Function isValidJSON (children 1)
     ExpressionList (children 1)
      Identifier s
