> a) What is the distinction between our data type TEXT and the SQL:2011 data type CLOB which we do not support
(T041)?
I'd say there is no difference.
> b) Is there a distinction between the two Postgres data types TEXT and "CHARACTER VARYING without specifying a
length"
> or are they only synonym terms without different functionalities and capabilities?
No there is no difference.
Quote from the manual [1]
> Tip: There is no performance difference among these three types,
> apart from increased storage space when using the blank-padded type
Thomas
[1] https://www.postgresql.org/docs/current/static/datatype-character.html