question about adding a new field

I used to add a field in pinot table schema and then I reload all segments, then I use "select * from table limit 10" and see the new field is already added. However, the value of the new field is always null (i.e. the default value of the field).

Since I am new to pinot, I am quite confused, is that related to segment flush strategy? For example, if I set the flushing time to 3h, does it mean I can only see the value in 3h?

Start with Pinot table-schema changes, segment reload behavior, and the reported SELECT * query, then check how a three-hour flush interval affects newly added fields. Reproduce the field remaining null after a reload and determine whether new ingestion or waiting for the flush interval is required; done means documenting the observed behavior and its cause.

Written by the indexing model from the issue text.