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Apache Druid: a high performance real-time analytics database.
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Gian Merlino 5f6bdd940b SQL: Improve translation of time floor expressions. (#5107) 
* SQL: Improve translation of time floor expressions.

The main change is to TimeFloorOperatorConversion.applyTimestampFloor.

- Prefer timestamp_floor expressions to timeFormat extractionFns, to
  avoid turning things into strings when it isn't necessary.
- Collapse CAST(FLOOR(X TO Y) AS DATE) to FLOOR(X TO Y) if appropriate.

* Fix tests.
 		2017-11-29 12:06:03 -08:00
.idea Add useL2 and populateL2 configs to HybridCache (#5088) 2017-11-20 16:57:05 -06:00
api Prohibit and remove unused declarations in the processing module (#4930) 2017-11-09 09:27:27 -08:00
aws-common Refactoring PrefetchableTextFilesFirehoseFactory (#4836) 2017-10-13 21:39:28 -05:00
benchmarks Fix IndexMergeBenchmark (#5118) 2017-11-26 16:03:58 -08:00
bytebuffer-collections Prohibit and remove unused declarations in the processing module (#4930) 2017-11-09 09:27:27 -08:00
ci Run integration tests on travis (#4344) 2017-05-31 18:27:34 -07:00
codestyle Add checkstyle and intellij rule to prohibit unnecessary qualifiers in interfaces (#4958) 2017-10-13 07:56:19 -07:00
common SQL: Improve translation of time floor expressions. (#5107) 2017-11-29 12:06:03 -08:00
distribution Bump versions in master to 0.11.1-SNAPSHOT. (#4878) 2017-09-28 17:09:51 -05:00
docs Fix typo in docs (#5074) 2017-11-22 23:16:36 -03:00
examples Introduce "transformSpec" at ingest-time. (#4890) 2017-10-30 17:38:52 -07:00
extendedset Add checkstyle and intellij rule to prohibit unnecessary qualifiers in interfaces (#4958) 2017-10-13 07:56:19 -07:00
extensions-contrib Fix StatsD Emitter with blank character (#5044) 2017-11-16 11:12:24 -08:00
extensions-core Update Avro to 1.8.2 (#5075) 2017-11-20 20:29:17 -08:00
hll Prohibit and remove unused declarations in the processing module (#4930) 2017-11-09 09:27:27 -08:00
indexing-hadoop Using ImmutableDruidDataSource as a key for map and set instead of DruidDataSource (#5054) 2017-11-09 16:07:58 -03:00
indexing-service Remove Injector from IngestSegmentFirehoseFactory (#5045) 2017-11-20 15:54:35 -08:00
integration-tests Integration tests port fix, logs output, lib share changes (#5061) 2017-11-10 14:07:37 -08:00
java-util Add compaction task (#4985) 2017-11-03 21:55:27 -06:00
processing SQL: Improve translation of time floor expressions. (#5107) 2017-11-29 12:06:03 -08:00
publications Changes to lambda architecture paper required for HICSS (#3382) 2016-09-06 21:32:21 -07:00
server Fix AnnouncerTest.testSanity() (#5077) 2017-11-20 20:27:41 -08:00
services Add unsecured /health endpoint, remove auth checks from isLeader (#5087) 2017-11-15 14:41:30 -06:00
sql SQL: Improve translation of time floor expressions. (#5107) 2017-11-29 12:06:03 -08:00
.gitignore git ignore dependency-reduced-pom.xml (#4711) 2017-08-23 10:10:50 -07:00
.travis.yml Fix AnnouncerTest.testSanity() (#5077) 2017-11-20 20:27:41 -08:00
CONTRIBUTING.md Update git workflow (#4418) 2017-06-16 19:27:46 -07:00
DruidCorporateCLA.pdf fix CLA email / mailing address 2014-04-17 15:26:28 -07:00
DruidIndividualCLA.pdf fix CLA email / mailing address 2014-04-17 15:26:28 -07:00
INTELLIJ_SETUP.md Prohibit and remove unused declarations in the processing module (#4930) 2017-11-09 09:27:27 -08:00
LICENSE Clean up README and license 2015-02-18 23:09:28 -08:00
NOTICE Extension points for authentication/authorization (#4271) 2017-09-15 23:45:48 -07:00
README.md Add TeamCity inspections badge (#4351) 2017-06-06 20:53:25 -04:00
druid_intellij_formatting.xml Make formatting IntelliJ 2016 friendly (#2978) 2016-05-18 12:42:21 -07:00
eclipse.importorder Merge pull request #2905 from javasoze/eclipse_formatting 2016-04-29 18:42:03 -07:00
eclipse_formatting.xml Merge pull request #2905 from javasoze/eclipse_formatting 2016-04-29 18:42:03 -07:00
intellij-sdk-config.jpg Prohibit and remove unused declarations in the processing module (#4930) 2017-11-09 09:27:27 -08:00
pom.xml Update Avro to 1.8.2 (#5075) 2017-11-20 20:29:17 -08:00
upload.sh upload.sh: Use awscli if s3cmd is not available. (#3114) 2016-06-08 17:01:46 -07:00

README.md

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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

Apache License, Version 2.0

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.