mirror of
https://github.com/apache/superset.git
synced 2024-09-18 19:49:37 -04:00
2913063924
* move assets out, get webpack dev working * update docs to reference superset-frontend * draw the rest of the owl * fix docs * fix webpack script * rats * correct docs * fix tox dox
65 lines
2.5 KiB
ReStructuredText
65 lines
2.5 KiB
ReStructuredText
.. Licensed to the Apache Software Foundation (ASF) under one
|
|
or more contributor license agreements. See the NOTICE file
|
|
distributed with this work for additional information
|
|
regarding copyright ownership. The ASF licenses this file
|
|
to you under the Apache License, Version 2.0 (the
|
|
"License"); you may not use this file except in compliance
|
|
with the License. You may obtain a copy of the License at
|
|
|
|
.. http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
.. Unless required by applicable law or agreed to in writing,
|
|
software distributed under the License is distributed on an
|
|
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
|
|
KIND, either express or implied. See the License for the
|
|
specific language governing permissions and limitations
|
|
under the License.
|
|
|
|
Druid
|
|
=====
|
|
|
|
Superset has a native connector to Druid and a majority of Druid's
|
|
features are accessible through Superset.
|
|
|
|
.. note ::
|
|
Druid now supports SQL and can be accessed through Superset's
|
|
SQLAlchemy connector. The long-term vision is to deprecate
|
|
the Druid native REST connector and query Druid exclusively through
|
|
the SQL interface.
|
|
|
|
Aggregations
|
|
------------
|
|
|
|
Common aggregations or Druid metrics can be defined and used in Superset.
|
|
The first and simpler use case is to use the checkbox matrix expose in your
|
|
datasource's edit view (``Sources -> Druid Datasources ->
|
|
[your datasource] -> Edit -> [tab] List Druid Column``).
|
|
Clicking the ``GroupBy`` and ``Filterable`` checkboxes will make the column
|
|
appear in the related dropdowns while in explore view. Checking
|
|
``Count Distinct``, ``Min``, ``Max`` or ``Sum`` will result in creating
|
|
new metrics that will appear in the ``List Druid Metric`` tab upon saving the
|
|
datasource. By editing these metrics, you'll notice that their ``json``
|
|
element corresponds to Druid aggregation definition. You can create your own
|
|
aggregations manually from the ``List Druid Metric`` tab following Druid
|
|
documentation.
|
|
|
|
.. image:: _static/images/druid_agg.png
|
|
:scale: 50 %
|
|
|
|
Post-Aggregations
|
|
-----------------
|
|
|
|
Druid supports post aggregation and this works in Superset. All you have to
|
|
do is create a metric, much like you would create an aggregation manually,
|
|
but specify ``postagg`` as a ``Metric Type``. You then have to provide a valid
|
|
json post-aggregation definition (as specified in the Druid docs) in the
|
|
Json field.
|
|
|
|
|
|
Unsupported Features
|
|
--------------------
|
|
|
|
.. note ::
|
|
Unclear at this point, this section of the documentation could use
|
|
some input.
|