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https://issues.apache.org/jira/browse/SOLR-2202?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Greg Fodor updated SOLR-2202:
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Attachment: SOLR-2202-solr-9.patch
Further testing on production datasets revealed that the use of the trie query,
particularly in conjunction with the currency based scorer, yielded much poorer
performance than simply computing the values directly using the field cache.
(My guess is the reason for this is due to the low cardinality of price values
in practical datasets.)
So, this patch rolls back a lot of the complexity of previous patches by
removing the need to construct accurate trie bounds. This removes the entire
"currency drift" properties file discussed above and also removes the
incompatibility with the zookeeper resource loader.
Other changes in this patch are improvements to the MoneyValueSource to improve
performance through caching and removing boxing.
> Money FieldType
> ---------------
>
> Key: SOLR-2202
> URL: https://issues.apache.org/jira/browse/SOLR-2202
> Project: Solr
> Issue Type: New Feature
> Components: Schema and Analysis
> Affects Versions: 1.5
> Reporter: Greg Fodor
> Attachments: SOLR-2022-solr-3.patch, SOLR-2202-lucene-1.patch,
> SOLR-2202-solr-1.patch, SOLR-2202-solr-2.patch, SOLR-2202-solr-4.patch,
> SOLR-2202-solr-5.patch, SOLR-2202-solr-6.patch, SOLR-2202-solr-7.patch,
> SOLR-2202-solr-8.patch, SOLR-2202-solr-9.patch
>
>
> Attached please find patches to add support for monetary values to
> Solr/Lucene with query-time currency conversion. The following features are
> supported:
> - Point queries (ex: "price:4.00USD")
> - Range quries (ex: "price:[$5.00 TO $10.00]")
> - Sorting.
> - Currency parsing by either currency code or symbol.
> - Symmetric & Asymmetric exchange rates. (Asymmetric exchange rates are
> useful if there are fees associated with exchanging the currency.)
> At indexing time, money fields can be indexed in a native currency. For
> example, if a product on an e-commerce site is listed in Euros, indexing the
> price field as "10.00EUR" will index it appropriately. By altering the
> currency.xml file, the sorting and querying against Solr can take into
> account fluctuations in currency exchange rates without having to re-index
> the documents.
> The new "money" field type is a polyfield which indexes two fields, one which
> contains the amount of the value and another which contains the currency code
> or symbol. The currency metadata (names, symbols, codes, and exchange rates)
> are expected to be in an xml file which is pointed to by the field type
> declaration in the schema.xml.
> The current patch is factored such that Money utility functions and
> configuration metadata lie in Lucene (see MoneyUtil and CurrencyConfig),
> while the MoneyType and MoneyValueSource lie in Solr. This was meant to
> mirror the work being done on the spacial field types.
> This patch has not yet been deployed to production but will be getting used
> to power the international search capabilities of the search engine at Etsy.
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