cf. file, some fields can have multiple value, e.g. multiple fixed versions of a jira "5.12,5.13" and we Solr support multivalue fields (i.e. the both values are split in the same field "5.12" "5.13" instead of being a concatenated value "5.12,5.13")
The goal is to support the 'split' operation of the CSV handler:
The CSV handler is already the one used when the 'Index with a job' checkbox is not checked.
- In our case we should now show the '+ Operation' now even if the 'Index with a job' checkbox is not checked.
- Offer to add a split operation cf. screenshot and syntax 'f.category.split=true&f.category.seperator=%2C'
Code is for the CSV handler parameter for the Solr is just 'kwargs' in https://github.com/cloudera/hue/blob/5f4efa6c62aa1616a10276efdfaad991010a29c2/desktop/libs/indexer/src/indexer/api3.py#L250
(to keep in mind, we might add 'trim' and 'map' operations at some point later)