David Smiley created SOLR-9085:
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Summary: DateRangeField is broken before the year 1582
Key: SOLR-9085
URL: https://issues.apache.org/jira/browse/SOLR-9085
Project: Solr
Issue Type: Bug
Affects Versions: 6.0
Reporter: David Smiley
Assignee: David Smiley
Fix For: 6.1
DateRangeField has some issues for dates before 1582 (the Gregorian Change
Date), following Solr 6. The main problem is that it uses DateMathParser which
no longer observes a GCD and then it converts that Date to a Calendar using
Calendar.setTime(date) which considers the GCD. We can't altogether avoid
Calendar.java as in SOLR-9080 because DateRangePrefixTree currently
fundamentally depends on it. However I recently learned we can simply change
the GCD like so: {{cal.setGregorianChange(new Date(Long.MIN_VALUE));}}
beforehand. DateRangeField also calls Calendar.getTime as well, which is
affected by GCD considerations.
For users that use DateRangeField but do *not* use "Date Math" and do not have
'Z' in their date strings then date strings are completely parsed by
DateRangePrefixTree and there should be no issue.
DateRangePrefixTree ought to be improved a bit too (in a separate issue)...
like making the GCD configurable, and setting using
SimpleDateFormatter.setCalendar it uses to format.
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