ldapmodify help?

["oberwetter, josh" <joberwetter@grownetwork.com>]

I'm hoping that somebody can provide me with good advice about how to
simplify the following process:

The data in my directory is derived from the tables in a large Oracle
database. Periodically a new data set is fed into Oracle, and
changes/additions must be propagated to the directory.

This seems fairly simple: create two different LDIFs, one that contains
_new_ entries (so that I can use ldapmodify with the -a flag) and another
that contains _modified_ entries (so that I can use ldapmodify with the -r
flag).

The complication is that some of the new entries in the database may have
been manually added to the directory between data feeds, and these additions
woudl cause "ldapmodify -a" to throw the old "ldap_add: Already exists"
error. Similarly, some of the new database entries have _not_ been added to
the directory, so "ldapmodify -r" would throw a "ldap_modify: No such
object" error.

Does anybody know an easy way to combine modifies and adds and still use the
alternative input format? I can write something that distinguishes betwee
changetypes, but I'm short on time now and would prefer a quick fix.
Will using the -c flag (continuous operation mode) cause a data integrity
problem? Once I tried running ldapadd with one duplicate record. As expected
an "Already exists" error was thrown and ignored, but after this I couldn't
index the directory properly -- some attributetypes didn't index at all.

Thanks,
Josh