SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function groupArray (children 1)
     ExpressionList (children 1)
      Identifier dt
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier date_datetime_key_condition
   Function or (children 1)
    ExpressionList (children 2)
     Function greater (children 1)
      ExpressionList (children 2)
       Identifier dt
       Function toDate (children 1)
        ExpressionList (children 1)
         Literal \'2019-01-02\'
     Function lessOrEquals (children 1)
      ExpressionList (children 2)
       Identifier dt
       Function toDate (children 1)
        ExpressionList (children 1)
         Literal \'2021-01-02\'
