David Smiley created LUCENE-5692:
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Summary: Deprecate spatial DisjointSpatialFilter
Key: LUCENE-5692
URL: https://issues.apache.org/jira/browse/LUCENE-5692
Project: Lucene - Core
Issue Type: Bug
Components: modules/spatial
Affects Versions: 5.0
Reporter: David Smiley
The spatial predicate "IsDisjointTo" is almost the same as the inverse of
"Intersects", except that it shouldn't match documents without spatial data.
In another sense it's as if the query shape were inverted.
DisjointSpatialFilter is a utility filter that works (or worked, rather) by
using the FieldCache to see which documents have spatial data
(getDocsWithField()). Calculating that was probably very slow but it was at
least cacheable. Since LUCENE-5666 (v5/trunk only), Rob replaced this to use
DocValues. However for some SpatialStrategies (PrefixTree based) it wouldn't
make any sense to use DocValues *just* so that at search time you could call
getDocsWithField() when there's no other need for the un-inversion (e.g. no
need to lookup terms by document).
Perhaps an immediate fix is simply to revert the change made to
DisjointSpatialFilter so that it uses the FieldCache again, if that works
(though it's not public?). But stepping back a bit, this DisjointSpatialFilter
is really something unfortunate that doesn't work as well as it could because
it's not at the level of Solr or ES -- that is, there's no access to a
filter-cache. So I propose I simply remove it, and if a user wants to do this
for real, they should index a boolean field marking wether there's spatial data
and then combine that with a NOT and Intersects, in a straight-forward way.
Alternatively, some sort of inverting query shape could be developed, although
it wouldn't work with the SpatialPrefixTree technique because there is no edge
distinction -- the edge matches normally and notwithstanding changes to RPT
algorithms it would also match the edge of an inverted shape.
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