View stream and stream data points (events)

After selecting a stream to view, you can view the stream data points written to it. Stream data points are the properties values written to a stream for an index value, such as a timestamp or another sequential number. Think of each data point as a row in a spreadsheet. While viewing a stream, you can query for specific data subsets within the stream by count or by range. A chart is displayed that plots the data points that meet your query parameters. For instructions on the tasks that can be performed while viewing a stream and its data points, see Manage stream data points.

To view a stream and stream data points

1. In the navigation rail, select Data stores.

2. From the Change data store dropdown, verify that the data store instance containing the resources and data you want to work with is selected.

3. Select the Streams card.

4. From the data table, select the stream that you want to view.

5. From the side sheet, select View stream .

   The stream is displayed. By default, the last 50 data points written to the stream are displayed. For more information about updating the query to view different data points, see Query stream data points (events).

Range Query panel

Use the Range Query panel to query the stream for data points, which are data points written to the stream.

• Get Range Values:

  • Select the By Count tab to query a specified number of stream data points that follow a start index.

  • Select the By Range tab to query all stream data points within the window of a start index and end index.

• Get First Value: Queries for the first data point written to the stream.

• Get Last Value: Queries for the most recent data point written to the stream.

For more information on queries, see Query stream data points (events).

Data table columns

The data table for the stream lists each data point written to the stream within the parameters currently queried. The columns listed represent stream properties derived from its base Stream type. Each row lists the property values written to the stream for a given index value. The columns and properties listed change based on the stream and its type. The data table always includes a column that represents the index property (sometimes called the key), which is the sequential property used to organize the data table (which is usually a timestamp). This property is denoted by a Key .

Side sheet fields

Selecting an data point from the data table opens a side sheet that lists the value of each property associated with an index property value (usually a timestamp).

Chart

The chart displayed at the bottom of the page plots the stream data points queried in the query panel as a graph. Change the Y Axis to change the property and values plotted in the chart. Streams that have a secondary index can have their X Axis changed as well.

This chart is a simplified version of the chart depicted using Trend. For more information on using this chart, see Line chart.