I noticed that with reflection, my column lengths seems to be
incorrect for varchar2, and char columns that are using char storage
instead of byte storage.

I.E. a VARCHAR2(400 CHAR) colum, is reported to have a length of 1600
by sqlalchemy, as our database uses utf-32 for storage, however, there
is only room for 400 characters.

Should sqlalchemy be using the CHAR_LENGTH field instead of
DATA_LENGTH when reflecting character columns? CHAR_LENGTH returns 400
in the example above instead of 1600
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