[
http://issues.apache.org/jira/browse/LUCENE-463?page=comments#action_12358524 ]
Yonik Seeley commented on LUCENE-463:
-------------------------------------
Yep, I verified that AUTO sorting is your problem.
In FieldCacheImpl for an AUTO type, first Integer.parseInt() is tried, and if
that fails,
Float.parseFloat() is tried.
For your case, parseInt() will fail because it's too big, but parseFloat() will
work (but not with enough precision).
Float.parseFloat("20051004130501")=2.00510045E13
Float.parseFloat("20051006102501")=2.00510066E13
Float.parseFloat("20051005102501")=2.00510045E13
Notice how two of the strings map to the same float when parsed as such.
> Sorting does not work correcly on "String Date"
> -----------------------------------------------
>
> Key: LUCENE-463
> URL: http://issues.apache.org/jira/browse/LUCENE-463
> Project: Lucene - Java
> Type: Bug
> Environment: Java Windows XP, JRE 1.3.1
> Reporter: Etienne
> Priority: Minor
>
> I am doing a simple query with a sort on a date field already put on a string
> format (YYYYmmDDHHMMSS). I am presenting 10 results per pages. The results I
> have is not correctly sort. On a page "4 october" is before "5 october", on
> another page I got the same kind of error.
> These are logs of the sorting I get:
> 20051006102501 DATE: 06 oct. 2005
> 20051004130501 DATE: 04 oct. 2005 <-- PROBLEM!
> 20051005120200 DATE: 05 oct. 2005
> 20050928094805 DATE: 28 sept. 2005
> 20050928114901 DATE: 28 sept. 2005
> 20050928114901 DATE: 28 sept. 2005
> 20050928101901 DATE: 28 sept. 2005
> 20050928142601 DATE: 28 sept. 2005
> 20050928142601 DATE: 28 sept. 2005
> 20050929094100 DATE: 29 sept. 2005 <-- PROBLEM!
> 20050928132931 DATE: 28 sept. 2005
> 20050929090002 DATE: 29 sept. 2005 <-- PROBLEM!
> 20050927203403 DATE: 27 sept. 2005
> 20050927203402 DATE: 27 sept. 2005
> 20050927131901 DATE: 27 sept. 2005
> 20050927131901 DATE: 27 sept. 2005
> 20050927132501 DATE: 27 sept. 2005
> 20050927132500 DATE: 27 sept. 2005
> 20050927133101 DATE: 27 sept. 2005
> 20050927133100 DATE: 27 sept. 2005
> 20050926115001 DATE: 26 sept. 2005
> 20050927112301 DATE: 27 sept. 2005
> 20050926091200 DATE: 26 sept. 2005 <-- PROBLEM!
> 20050927085701 DATE: 27 sept. 2005
> 20050923111558 DATE: 23 sept. 2005
> 20050923103700 DATE: 23 sept. 2005
> 20050923144300 DATE: 23 sept. 2005
> 20050922102200 DATE: 22 sept. 2005
> 20050922082701 DATE: 22 sept. 2005
> 20050923085601 DATE: 23 sept. 2005 <-- PROBLEM!
> 20050815102204 DATE: 15 august 2005
> 20050815102201 DATE: 15 august 2005
> 20050816102200 DATE: 16 august 2005 <-- PROBLEM!
> 20050815110400 DATE: 15 august 2005
> 20050816124500 DATE: 16 august 2005 <-- PROBLEM!
> 20050812163334 DATE: 12 august 2005
> 20050812163331 DATE: 12 august 2005
> 20050812161840 DATE: 12 august 2005
> 20050812161935 DATE: 12 août 2005
> 20050812113442 DATE: 12 août 2005
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