Renaming catalog keywords

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yes, now that you mention it I think is better just to iterate over all objects instead and convert all keywords to lowercase like this:

results = catalog()
for b in results:
    obj = b.getObject()
    keywords = list(obj.Subject())
    lowercase = [k.lower() for k in keywords]
    if keywords == lowercase:
        continue
    obj.setSubject(tuple(lowercase))
    catalog.catalog_object(obj, idxs=['Subject'], update_metadata=False)

that has to be faster because I'm doing less catalog reindexes.

so, there no other way? no hidden catalog methods for doing this?