97765fdfef
* Simplify LikeFilter implementation of getBitmapIndex, estimateSelectivity. LikeFilter: - Reduce code duplication, and simplify methods, at the cost of incurring an extra box of ImmutableBitmap into a SingletonImmutableList. I think this is fine, since this should be cheap and the code path is not hot (just once per filter). Filters: - Make estimateSelectivity public since it seems intended that they be used by Filter implementations, and Filters from extensions may want to use them too. Removed @VisibleForTesting for the same reason. - Rename one of the estimatePredicateSelectivity overloads to estimateSelectivity, since predicates aren't involved. * Address PR comments. * Remove unused import * Change List to Collection
Druid
Druid is a distributed, column-oriented, real-time analytics data store that is commonly used to power exploratory dashboards in multi-tenant environments.
Druid excels as a data warehousing solution for fast aggregate queries on petabyte sized data sets. Druid supports a variety of flexible filters, exact calculations, approximate algorithms, and other useful calculations.
Druid can load both streaming and batch data and integrates with Samza, Kafka, Storm, Spark, and Hadoop.
License
More Information
More information about Druid can be found on http://www.druid.io.
Documentation
You can find the documentation for the latest Druid release on the project website.
If you would like to contribute documentation, please do so under
/docs/content in this repository and submit a pull request.
Getting Started
You can get started with Druid with our quickstart.
Reporting Issues
If you find any bugs, please file a GitHub issue.
Community
Community support is available on the druid-user mailing list(druid-user@googlegroups.com).
Development discussions occur on the druid-development list(druid-development@googlegroups.com).
We also have a couple people hanging out on IRC in #druid-dev on
irc.freenode.net.
Contributing
Please follow the guidelines listed here.