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Gian Merlino f0f68570ec
Use DataSourceAnalysis throughout the query stack. (#9239) 
Builds on #9235, using the datasource analysis functionality to replace various ad-hoc
approaches. The most interesting changes are in ClientQuerySegmentWalker (brokers),
ServerManager (historicals), and SinkQuerySegmentWalker (indexing tasks).

Other changes related to improving how we analyze queries:

1) Changes TimelineServerView to return an Optional timeline, which I thought made
   the analysis changes cleaner to implement.
2) Added QueryToolChest#canPerformSubquery, which is now used by query entry points to
   determine whether it is safe to pass a subquery dataSource to the query toolchest.
   Fixes an issue introduced in #5471 where subqueries under non-groupBy-typed queries
   were silently ignored, since neither the query entry point nor the toolchest did
   anything special with them.
3) Removes the QueryPlus.withQuerySegmentSpec method, which was mostly being used in
   error-prone ways (ignoring any potential subqueries, and not verifying that the
   underlying data source is actually a table). Replaces with a new function,
   Queries.withSpecificSegments, that includes sanity checks.
 		2020-01-23 14:07:14 -08:00
..
ambari-metrics-emitter Remove the deprecated interval-chunking stuff. (#9216) 2020-01-19 17:14:23 -08:00
azure-extensions Set version to 0.18.0-SNAPSHOT (#9109) 2020-01-02 17:55:10 -05:00
cassandra-storage Set version to 0.18.0-SNAPSHOT (#9109) 2020-01-02 17:55:10 -05:00
cloudfiles-extensions Set version to 0.18.0-SNAPSHOT (#9109) 2020-01-02 17:55:10 -05:00
distinctcount De-incubation cleanup in code, docs, packaging (#9108) 2020-01-03 12:33:19 -05:00
dropwizard-emitter Remove the deprecated interval-chunking stuff. (#9216) 2020-01-19 17:14:23 -08:00
graphite-emitter Remove the deprecated interval-chunking stuff. (#9216) 2020-01-19 17:14:23 -08:00
influx-extensions Set version to 0.18.0-SNAPSHOT (#9109) 2020-01-02 17:55:10 -05:00
influxdb-emitter Set version to 0.18.0-SNAPSHOT (#9109) 2020-01-02 17:55:10 -05:00
kafka-emitter Set version to 0.18.0-SNAPSHOT (#9109) 2020-01-02 17:55:10 -05:00
materialized-view-maintenance Set version to 0.18.0-SNAPSHOT (#9109) 2020-01-02 17:55:10 -05:00
materialized-view-selection Use DataSourceAnalysis throughout the query stack. (#9239) 2020-01-23 14:07:14 -08:00
momentsketch fix moment sketch null handling (#9075) 2020-01-07 14:15:59 -06:00
moving-average-query Use DataSourceAnalysis throughout the query stack. (#9239) 2020-01-23 14:07:14 -08:00
opentsdb-emitter Remove the deprecated interval-chunking stuff. (#9216) 2020-01-19 17:14:23 -08:00
redis-cache Set version to 0.18.0-SNAPSHOT (#9109) 2020-01-02 17:55:10 -05:00
sqlserver-metadata-storage Set version to 0.18.0-SNAPSHOT (#9109) 2020-01-02 17:55:10 -05:00
statsd-emitter Remove the deprecated interval-chunking stuff. (#9216) 2020-01-19 17:14:23 -08:00
tdigestsketch Set version to 0.18.0-SNAPSHOT (#9109) 2020-01-02 17:55:10 -05:00
thrift-extensions Set version to 0.18.0-SNAPSHOT (#9109) 2020-01-02 17:55:10 -05:00
time-min-max Set version to 0.18.0-SNAPSHOT (#9109) 2020-01-02 17:55:10 -05:00
virtual-columns Remove the deprecated interval-chunking stuff. (#9216) 2020-01-19 17:14:23 -08:00
README.md add missing license headers, in particular to MD files; clean up RAT … (#6563) 2018-11-13 09:38:37 -08:00

README.md

Community Extensions

Please contribute all community extensions in this directory and include a doc of how your extension can be used under /docs/content/development/extensions-contrib/.

Please note that community extensions are maintained by their original contributors and are not packaged with the core Druid distribution. If you'd like to take on maintenance for a community extension, please post on dev@druid.apache.org to let us know!