Nicholas Knize created LUCENE-6930:
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Summary: Decouple GeoPointField from NumericType
Key: LUCENE-6930
URL: https://issues.apache.org/jira/browse/LUCENE-6930
Project: Lucene - Core
Issue Type: Improvement
Reporter: Nicholas Knize
{{GeoPointField}} currently relies on {{NumericTokenStream}} to create prefix
terms for a GeoPoint using the precision step defined in {{GeoPointField}}. At
search time {{GeoPointTermsEnum}} recurses to a max precision that is computed
by the Query parameters. This max precision is never the full precision, so
creating and indexing the full precision terms is useless and wasteful (it was
always a side effect of just using indexing logic from the Numeric type).
Furthermore, since the numerical logic always stored high precision terms
first, the recursion in {{GeoPointTermsEnum}} required transient memory for
storing ranges. By moving the trie logic to its own {{GeoPointTokenStream}} and
reversing the term order (such that lower resolution terms are first), the
GeoPointTermsEnum can naturally traverse, enabling on-demand creation of
PrefixTerms.
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