SQL in Solr Michael Suzuki

Solr is now bilingual!

Overview State of play How does it work Why is it important Sample queries Lost in translation Predicates in SQL Demo

State of play Solr SQL introduced in Solr 6, 2016. Ported to use Calcite over Presto SQL Parser, 2017. It is a feature that is only supported in Solr 6 Cloud. There is work underway to port it to a standalone Solr. ODBC coming soon via calcite Phoenix.

How does it work It treats a Solr collection as a table. It translates SQL statement to streaming expression. Uses the Solr streaming expression API.

Why is it important Another way to query. SQL skill is more common and widely used. Hides Solr’s complexity and its various features. Existing reporting tools work with JDBC drivers.

Sample queries: How many films? select params={q=*:*&fl=numFound} select count(*) from films Which actor played the most leading roles? select params={q=*:*&json.facet={"actor_1_name":{"type":"terms","field":"actor_1_name","sort":{"count":"desc"}," facet":{}}}} select actor_1_name, count(*)from films group by actor_1_name order by count(*) desc Which director has the highest gross? select params={q=*:*&json.facet={"director_name":{"type":"terms","field":"director_name","limit":125,"sort":{"facet _0":"desc"},"facet":{"facet_0":"sum(gross)"} select director_name,sum(gross) from films group by director_name order by sum(gross) desc

Lost In Translation Solr is not a database. SELECT * FROM TABLE; is not supported. LIKE is not supported. Not Null is not supported.

Solr Predicates in SQL select movie_title from films where title_year = '[2013 TO 2015]' select movie_title, imdb_score from films where (actor_1_name ='Johnny Depp' and (imdb_score = '[7 TO *]')) select movie_title, title_year from films where _query_ = 'movie_title:B*' and title_year > 2014 Not null work around: select movie_title, title_year from films where _query_ = 'movie_title:*'

Demo

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