Missing text from <memo> field in table in report - ms-access

Question

I have multiple models in Sparx Enterprise Architect in file-based, i.e. using MS access.
I'm using a custom template to populate a table with data from object's properties, including some with <memo> fields.
This is the query i'm using in the template fragment:
SELECT obj.object_id,
obj.Stereotype,
objp.Property as Prop,
switch(objp.Value = '<memo>', objp.Notes, objp.Value LIKE '{*}',
NULL, 1=1, objp.Value) AS Val,
(SELECT tobj2.ea_guid & tobj2.Name FROM t_object tobj2 WHERE
tobj2.ea_guid = objp.Value) AS [Obj-Hyperlink]
FROM t_object obj
INNER JOIN t_objectproperties objp
ON (obj.object_id = objp.object_id)
WHERE obj.object_id = #OBJECTID# AND obj.Stereotype='Data-
Stream' AND objp.Property NOT IN ('isEncapsulated')
ORDER BY objp.Property ASC;
I found that the when these fields are longer than 249 chars I get an error message when generating the reports and the cell in the generated table is simply empty. This is also noticeable with a query:
The error I'm getting states:
"Error Processing xml document: an invalid character was found in text context"
Is there any workarround to enable including the <memo> fields' data with more than 249 chars in the reports?
Any help is much appreciated.

Answer 1

I've found a workaround for this by joining two queries with a "Union all". The first query will handle the non-memo fields with the switch function and the second one the memo fields without the switch function.
select
obj.object_id,
obj.Stereotype,
objp.Property as Prop,
objp.Notes AS Val,
(
SELECT
tobj2.ea_guid & tobj2.Name
FROM
t_object tobj2
WHERE
tobj2.ea_guid = objp.Value
) AS [Obj-Hyperlink]
from
t_objectproperties objp
left join t_object obj on (obj.object_id = objp.object_ID)
where
obj.object_id = #OBJECTID#
AND obj.Stereotype = 'Data-Stream'
AND objp.Property NOT IN ('isEncapsulated')
AND objp.Value = "<memo>"
UNION ALL
SELECT
obj2.object_id,
obj2.Stereotype,
objp2.Property as Prop,
switch(
objp2.Value LIKE '{*}', NULL, 1 = 1, objp2.Value
) AS Val,
(
SELECT
tobj2.ea_guid & tobj2.Name
FROM
t_object tobj2
WHERE
tobj2.ea_guid = objp2.Value
) AS [Obj-Hyperlink]
FROM
t_object obj2
INNER JOIN t_objectproperties objp2 ON (obj2.object_id = objp2.object_id)
WHERE
obj2.object_id = #OBJECTID#
AND obj2.Stereotype = 'Data-Stream'
AND objp2.Property NOT IN ('isEncapsulated')
and objp2.Value <> "<memo>"
order by
3 asc;
Thanks a lot #geertbellekens for your comment which was crucial to find this solution.