History

Clint Wylie 4283b270e3 rework cursor creation (#16533 ) changes: * Added `CursorBuildSpec` which captures all of the 'interesting' stuff that goes into producing a cursor as a replacement for the method arguments of `CursorFactory.canVectorize`, `CursorFactory.makeCursor`, and `CursorFactory.makeVectorCursor` * added new interface `CursorHolder` and new interface `CursorHolderFactory` as a replacement for `CursorFactory`, with method `makeCursorHolder`, which takes a `CursorBuildSpec` as an argument and replaces `CursorFactory.canVectorize`, `CursorFactory.makeCursor`, and `CursorFactory.makeVectorCursor` * `CursorFactory.makeCursors` previously returned a `Sequence<Cursor>` corresponding to the query granularity buckets, with a separate `Cursor` per bucket. `CursorHolder.asCursor` instead returns a single `Cursor` (equivalent to 'ALL' granularity), and a new `CursorGranularizer` has been added for query engines to iterate over the cursor and divide into granularity buckets. This makes the non-vectorized engine behave the same way as the vectorized query engine (with its `VectorCursorGranularizer`), and simplifies a lot of stuff that has to read segments particularly if it does not care about bucketing the results into granularities. * Deprecated `CursorFactory`, `CursorFactory.canVectorize`, `CursorFactory.makeCursors`, and `CursorFactory.makeVectorCursor` * updated all `StorageAdapter` implementations to implement `makeCursorHolder`, transitioned direct `CursorFactory` implementations to instead implement `CursorMakerFactory`. `StorageAdapter` being a `CursorMakerFactory` is intended to be a transitional thing, ideally will not be released in favor of moving `CursorMakerFactory` to be fetched directly from `Segment`, however this PR was already large enough so this will be done in a follow-up. * updated all query engines to use `makeCursorHolder`, granularity based engines to use `CursorGranularizer`.		2024-08-16 11:34:10 -07:00
..
src	rework cursor creation (#16533 )	2024-08-16 11:34:10 -07:00
README.md	chore: fix case of GitHub (#10928 )	2021-05-07 01:15:43 -07:00
pom.xml	Prepare master branch for 31.0.0 release (#16333 )	2024-04-26 09:22:43 +05:30

README.md

druid-moving-average-query

Overview

Moving Average Query is an extension which provides support for Moving Average and other Aggregate Window Functions in Druid queries.

Documentation

See the druid.apache.org website or under Druid GitHub Repo.