Using and managing OData feeds

This article explains how to set up a Devo data query as an OData feed. This will allow you to stream the data to external tools like, for example, Microsoft Excel, Tableau or Power BI. Currently, Devo feeds implement OData version 2.0.

The service root URL for OData feeds depends on the Devo domain region, either Europe or USA.

Set up an OData feed

1. Go to Data Search and run query whose data you want to share via OData.
2. Click the gear icon in the table toolbar, then select Query Info → OData URI.
   
   
   

3. The Create ODataV2 URL window opens.
   
   

   The following table describes the fields in this window:

   Feed friendly name	Enter a name for the data feed.
   Authentication type	Choose one of the following authentication options: No authentication - If you choose this mode, anyone with access to the feed might execute the query. For security reasons, we do not recommend this mode. Domain authentication - This is the default, recommended option. It automatically uses the OData API credentials from your account preferences. You can check and edit them in the Preferences → Account Preferences area. Go to the Domain preferences for more information. Standard authentication - This allows you to create a user and password that will only be used for this feed.
   Tags	Add tags to the feed to easily identify it in the Api/OData tab of the Data Management area.

4. Click Create. The feed URL is generated and you can copy it to your clipboard.
   
   

Manage feeds

All the feeds that have been created in your domain are listed in the API & OData Feeds tab of the Administration → Data Management area. Check the API & OData feeds article for more information.

OData feed parameters

You can add query string parameters to the OData feed URI to specify the data you want to retrieve. These parameters can be used to, for example, control the amount and order of the data that an OData service returns for the query identified by the URI.

OData feed URIs may include as many parameters as required, which are always prefixed with a "&" character (except the $metadata parameter). 

The following table lists the supported parameters using a feed URL for a Devo domain in the USA cloud region:

The following is an example of an OData feed with four different parameters:

https://api-us.devo/odatav2/Query.svc/0c6f1165-4ac8-4ca4-87df-06bede2d1f53/e59f069b5bf113da8101372f50d90b8b/query?from=2018-10-02T09:40:18.224&to=2018-10-03T09:40:00&$select=eventdate,cid&$top=10&$skip=9&$format=json

In this case, you will only receive the data in the eventdate and cid columns, as specified in the select parameter. The top parameter indicates that only the first 10 events will be shown and the skip parameter will make the counting start after the first nine events. As a result, only 10 events from the event number 10 will be shown. Data will be retrieved in JSON format as indicated in the format parameter.

See the OData documentation for further details.

Working with relative time ranges

A relative date range is a period of time that is relative to the current date (last week, last month, etc). There are some rules to consider when using the relative date ranges in OData URI:

• If you run a query without from, the request will use [dateTo - 1h, dateTo] as time range.
• If you run a query without to, the request will use [dateFrom, now] as time range.
• If you run a query without from and to, the request will use [now - 1h, now] as time range.
• If you run a query using to → from, the request will use [from, now] as time range.
• If you run a query using now → from, the request will use [now - 1h, now] as time range

See below the parameters you can add to your OData URI to apply relative date ranges.

From (defines the start date)

• Relative - It retrieves the current time (day, month, hour, minutes and seconds) excluding a specified range of days/hours. The valid range dates you can use are days(d) and hours(h).

• Absolute - The only valid range date you can use is days(d).

• Specific - They are specific filters using the current date and hour,but the minutes and seconds are setup as 0.

To (defines the end date)

• Relative - The valid range dates you can use are days(d) and hours.

• Absolute - The only valid range dates you can use are days(d).

• Specific - Based on specific operators such as end of day, end of month, etc.
  
  • &to=now - it retrieves the current hour, minutes and seconds.

• • &to=endday - covers the range time between "from" date and the end of the day. It's the same as "&to=1ad".

• • &to=endmonth - covers the range time between the current date and the end of the month.

Related articles

• Connecting with Excel
• Connecting with Tableau
• Connecting with Power BI