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SQL Lab
=======
SQL Lab is a modern, feature-rich SQL IDE written in
`React <https://facebook.github.io/react/> `_ .
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.. image :: images/screenshots/sqllab.png
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Feature Overview
----------------
- Connects to just about any database backend
- A multi-tab environment to work on multiple queries at a time
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- A smooth flow to visualize your query results using Superset's rich
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visualization capabilities
- Browse database metadata: tables, columns, indexes, partitions
- Support for long-running queries
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- uses the `Celery distributed queue <http://www.celeryproject.org/> `_
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to dispatch query handling to workers
- supports defining a "results backend" to persist query results
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- A search engine to find queries executed in the past
- Supports templating using the
`Jinja templating language <http://jinja.pocoo.org/docs/dev/> `_
which allows for using macros in your SQL code
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Extra features
--------------
- Hit `` alt + enter `` as a keyboard shortcut to run your query
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Templating with Jinja
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.. code-block :: sql
SELECT *
FROM some_table
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WHERE partition_key = '{{ presto.latest_partition('some_table') }}'
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Templating unleashes the power and capabilities of a
programming language within your SQL code.
Templates can also be used to write generic queries that are
parameterized so they can be re-used easily.
Available macros
''''''''''''''''
We expose certain modules from Python's standard library in
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Superset's Jinja context:
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- `` time `` : `` time ``
- `` datetime `` : `` datetime.datetime ``
- `` uuid `` : `` uuid ``
- `` random `` : `` random ``
- `` relativedelta `` : `` dateutil.relativedelta.relativedelta ``
`Jinja's builtin filters <http://jinja.pocoo.org/docs/dev/templates/> `_ can be also be applied where needed.
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.. autoclass :: superset.jinja_context.PrestoTemplateProcessor
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:members:
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.. autofunction :: superset.jinja_context.url_param
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.. autofunction :: superset.jinja_context.filter_values
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Extending macros
''''''''''''''''
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As mentioned in the `Installation & Configuration <https://superset.incubator.apache.org/installation.html#installation-configuration> `_ documentation,
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it's possible for administrators to expose more more macros in their
environment using the configuration variable `` JINJA_CONTEXT_ADDONS `` .
All objects referenced in this dictionary will become available for users
to integrate in their queries in **SQL Lab** .