[Zope] external method and gadfly

[Rico Friedrich]

hi,

i've got two questions dealing with gadfly and
python scripting using external methods (Zope).

1. how to set the column- and table-name dynamically 
   in a sql-query ?
   i.g. c.execute("select var1 from var2")

2. what's wrong if there is no table-update after
   invoking     c.execute("update ...")
                c.commit()
   (autocheckpoint enable)

thanks for your help
rico