Query

Query Nodes in Cortex facilitate data querying and manipulation by allowing users to filter and process Input. Attributes are automatically sourced from adjacent Sink or Buffer Nodes, simplifying the setup process. The configuration includes options for Input Filtering and on-the-fly Windowing, enabling precise data analysis.

Step 1 - General

Name and Description

When configuring an Query Node in Cortex involves several key actions.

• Assign a unique name to the Node, distinct from other Nodes in your Application.

• Optionally, add a Description for detail and clarity.

• The Node Name and Description will help distinguish it in the Canvas via Node Preview.

Attributes

For the Query Node in Cortex, the Attributes are automatically derived as inputs from Sink or Buffer Nodes connected to its left side.

• Attributes in the Query Node automatically originate from Sink or Buffer Nodes to its left.

• Attributes Table displays a list of Attributes Names, Input Node Names, and Attribute Types for each input attribute.

Step 2 - Input Processing Logic

In the Step 2 of configuring the Query Node in Cortex, you have the flexibility to create an Input Filter and establish a Window for the input attributes.

An Input Filter and a Window can be used either simultaneously or one by one , offering adaptability in processing.

While creating Application with multiple Node Units, you may need to use Query Nodes that are just passthrough. The Query Node acts like a passthrough neither has a filter or a window within it; so it doesn't process any Input Attribute. This happens when you need to create multiple Node Units consecutively and need to employ an Query Node to abide by the logic.

Query Node may have neither a filter nor a window in some cases where you have to abide by rules for Node Units.

Enable Filter

To create an input filter for Query Node Attributes, activate the toggle next to Enable Filter.

You can refer to Expression Builder to learn how to create a filter using the Expression Builder.

Enable Window

To create a window to group Input Attributes activate the toogle next to the Enable Window.

By selecting a Window Type from the dropdown, you can group incoming events with different time, quantity, order, or count constraints you require.

You can refer to Windows to learn how to effectively choose and create windows.

Step 3 - Preview

In Preview Step, you're provided with a concise summary of all the changes you've made to the Query Node. This step is pivotal for reviewing and ensuring that your configurations are as intended before completing node setup.

• Viewing Configurations: Preview Step presents a consolidated view of your node setup.

• Saving and Exiting: Use the Complete button to save your changes and exit the node and return back to Canvas.

• Revisions: Use the Back button to return to any Step of modify node setup.

The Preview Step offers a user-friendly summary to manage and finalize node settings in Cortex.