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Xavier Léauté 2014-08-01 15:27:38 -07:00
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docs/content/Querying.md
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--- ---
layout: doc_page layout: doc_page
--- ---
Querying Querying
======== ========
Queries are made using an HTTP REST style request to a [Broker](Broker.html), [Historical](Historical.html), or [Realtime](Realtime.html) node. The query is expressed in JSON and each of these node types expose the same REST query interface. Queries are made using an HTTP REST style request to a [Broker](Broker.html),
[Historical](Historical.html), or [Realtime](Realtime.html) node. The
query is expressed in JSON and each of these node types expose the same
REST query interface.
We start by describing an example query with additional comments that mention possible variations. Query operators are also summarized in a table below. We start by describing an example query with additional comments that mention
possible variations. Query operators are also summarized in a table below.
Example Query "rand" Example Query "rand"
-------------------- --------------------
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------------------ ------------------
Queries can be cancelled explicitely using their unique identifier. If the Queries can be cancelled explicitely using their unique identifier. If the
query identifier is set at the time of query, or is known, the following query identifier is set at the time of query, or is otherwise known, the following
endpoint can be used on the broker or router to cancel the query. endpoint can be used on the broker or router to cancel the query.
```sh ```sh