NumericField should be stored in binary format in index (matching Solr's format)
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Key: LUCENE-3065
URL: https://issues.apache.org/jira/browse/LUCENE-3065
Project: Lucene - Java
Issue Type: Bug
Components: Index
Reporter: Michael McCandless
Priority: Minor
Fix For: 3.2, 4.0
(Spinoff of LUCENE-3001)
Today when writing stored fields we don't record that the field was a
NumericField, and so at IndexReader time you get back an "ordinary" Field and
your number has turned into a string. See
https://issues.apache.org/jira/browse/LUCENE-1701?focusedCommentId=12721972&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-12721972
We have spare bits already in stored fields, so, we should use one to record
that the field is numeric, and then encode the numeric field in Solr's
more-compact binary format.
A nice side-effect is we fix the long standing issue that you don't get a
NumericField back when loading your document.
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