I was going through the documentation where it says for some mapping parameters, we CAN update the existing index using PUT index/_mapping.
"normalizer" being one of those parameters - Update mapping API | Elasticsearch Guide [8.7] | Elastic
But it seems like we cannot even update the normalizer on an existing index using the putMapping API?
I am trying adding normalizer directly to a field, but
Cannot update parameter [normalizer] from [null] to [lowercase]
Should I have to reindex the whole data even for adding normalizer to existing index mapping?
Appreciate an answer on this, thanks!