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From Tomás Fernández Löbbe (JIRA) <>
Subject [jira] [Commented] (SOLR-8802) Make remaining mutable Queries immutable
Date Tue, 08 Mar 2016 19:48:40 GMT


Tomás Fernández Löbbe commented on SOLR-8802:

Would there be a problem with enforcing this in the code as this ticket suggests?

> Make remaining mutable Queries immutable
> ----------------------------------------
>                 Key: SOLR-8802
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Luc Vanlerberghe
>            Priority: Minor
> See LUCENE-6531
> Mutable queries are an issue for automatic filter caching since modifying a query after
it has been put into the cache will corrupt the cache. We should make all queries immutable
(up to the boost) to avoid this issue.
> Since they are part of the public API I would suggest splitting them in an immutable
class and a builder like was done for most other Queries *before* releasing an official 6.x
> I did a quick scan through all derived classes of Query and I compiled the following
list (ignoring sources in test or contrib folders)
> Some of them are already marked as experimental (but should perhaps receive the "official"
@lucene.experimental tag ?)
> For some it's possibly not an issue since they should never end up in a filter cache
(like MoreLikeThisQuery ?), but then a comment specifying the exception to the rule should
perhaps be added.
> * solr/core:
> ** Several derived classes, among which:
> ** org.apache.solr.query.FilterQuery
> ** org.apache.solr.query.SolrRangeQuery (marked as @lucene.experimental)
> ** (marked in comment as experimental, but not its derived
> **
> ** (marked as @lucene.experimental)
> ** (marked in comment as experimental,
but not the derived FunctionRangeQuery)

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