It is possible to search for acquisition date from the advanced search in staff. But if you try to use the index name for an 'expert search' in the keyword search field, no results will come up. Example: Advanced search > acquisition date: 2016-12* (or whatever works for you) This should give correct results. Enter acqdate,st-date-normalized: 2016-12* into the keyword search - no results will appear. Something seems to be missing in order to make it possible to construct the same search manually.
Wildcard * is not a CCL syntax. One must use "rt" (right truncation) : acqdate,rt:2016-12 You may use "ge" (greater or equal) or "le" or "gt" or "lt", with "st-date-normalized" : acqdate,ge,st-date-normalized:2016-12-01 Funny thing "acqdate,st-date-normalized,ge" does not work.
Frido, that took a while, but it works, I think also with ge at the end in 20.11. Thanks!