Update description of mandatory timestamp field #94983
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While experimenting with EQL I noticed it raised this error when the timestamp field was mapped as
date
with formatyyyy-MM-dd HH:mm:ss
:search_phase_execution_exception: [parse_exception] Reason: failed to parse date field [1680434649000] with format [yyyy-MM-dd HH:mm:ss]
In particular, it happens when making a sequence query: https://www.elastic.co/guide/en/elasticsearch/reference/8.7/eql-syntax.html#eql-sequences
This gets solved when formatting the timestamp field as
epoch_millis
.I'm not sure whether this is expected and fixing the docstring is enough or a bigfix ticket is needed.