When a time-based index is added to kibana, you have to pick the field that will act as a time field. If you want to switch from one field to another, normally I would delete the index and re-add it back. But you end up loosing scripted fields and filed formatting this way.
Is there any way to modify the existing index time field without loosing scripted fields/formatting?
It can probably be done by messing around directly with /.kibana/index-pattern/index_pattern_name
but all my attempts with changing timeFieldName
directly ended up dropping scripted fields.
The easiest way seems to update the corresponding document:
POST /.kibana/index-pattern/YOUR_INDEX_NAME/_update
{
"doc": {
"timeFieldName": "NEW_TIME_FIELD_NAME"
}
}
It should preserve scripted fields.