The  jpql:  "SELECT count(o) FROM Object o" (A)

is usually translated to this sql: "SELECT count(t.primarykey) FROM Table t"
(B)

I'm working with a legacy database witch jdbc driver doesn't accept this
format of sql. 
It works with: "SELECT count(*) FROM Tabelat" (C) 

Is there a way to make the query C (with count(*)) be generated instead of
query B? 

I'm using the default jpa dictionary.  I know that I can extend DBDictionary
in order to customize this. 
I had some difficulty trying to do this. 

Somebody would give some hint? 

Thanks. Mauro. 

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