What regular expression features are supported by Solr edismax?

Question

Regular expressions allows for the pattern matching syntax shown below. I\'m trying to implement a powerful search tool that implements as many of these as possible. I\'m to

Answer 1

Regular expressions and (e)dismax are not really comparable. Dismax is meant to work directly with common end-user input, while regular expressions are not typical end-user input.

Also, matching regular-expression-like things with dismax depends largely on text analysis settings and schema design, not on dismax itself. With Solr you typically tailor the schema and text analysis to the concrete search need, possibly doing much of the work at index-time. Regular expressions are at odds with this and even with the basic structure of Lucene inverted indices.

Still, Lucene provides RegexQuery and the newer RegexpQuery. As far as I know, these are not integrated with Solr, but they could be. Start a new item in the Solr issue tracker and happy coding! :)

Keep in mind that regex queries will probably always be slow... but they could have acceptable performance in your case.