I'm not sure is it feature / bug, but for sure such behavior is strange:

I've database with two tables. First table contains blob sub_type 1 charset none field, the second table contains blob sub_type 1 charset win1250 field. Database charset is WIN1250.

Under 2.0.3:

SELECT
DESCR
FROM TABLE1
UNION
SELECT
DESCR
FROM TABLE2

throws:

Engine Code : 335544378
Engine Message :
feature is not supported

But:

SELECT
DESCR
FROM TABLE2
UNION
SELECT
DESCR
FROM TABLE1

works : )

Under 2.1.4 both query are OK.

If it is already fixed bug (in 2.0.6) - forgive me.

b