[DB-SIG] Positioned Update/Delete

[Dr. Dieter Maurer]

Dear Andy

Thank you for your reply.

 > On Thu, 23 Apr 1998, Dr. Dieter Maurer wrote:
 > > How should positioned update/delete be best used with the DB-API:
<----- snip ---->
 > > 
 > 4a. cursor.execute("update TABLE set CURRENT = ?", (current,))
 > 
 > Assuming you are using an SQL-89 or so database; the API doesn't really
 > specify the query language syntax. 
I know.
SQL-92 specifies:
	positioned-update::=
	  UPDATE [table]
	  SET update-assignment-commalist
	  WHERE CURRENT OF cursor

Thus, I could formulate my question better in this way:
  "How should the cursor (which is a Python object) best be transported
  into the SQL world."

I see two interpretations for your suggestion:
 1. you suggest not to specify it at all (and "current" (in your suggestion)
    means the new value). But this might conflict with a searched
    update where the "where" clause has been omitted.

 2. "current" (in your suggestion) means in fact "cursor" which
    should be transfered via dynamic parameter into the SQL world.

    I can imagine, that this is a good solution.


Thank you again.
Dieter