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Kusto Data ClientRequestProperties class

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Applies to: ✅ Microsoft Fabric ✅ Azure Data Explorer

In the Kusto Data library, the ClientRequestProperties class helps manage interaction between your client application and the service. This class contains the following information:

  • Request properties: A mapping of specific options for customizing request behavior.
  • Query parameters: A mapping of user-declared parameters that allow for secure query customization.
  • Named properties: Client request ID, application details, and user data, primarily used for debugging and tracing.

Request properties

Request properties allow you to customize the behavior of a specific query. The ClientRequestProperties class has various methods for managing request properties, such as set option, get option, and has option. The precise method names vary by client library per language-specific naming conventions.

For a list of available request properties, see Request properties.

For example usage, see Customize query behavior with client request properties.

Query parameters

The query parameters declaration statement can be used to declare parameters for a Kusto Query Language (KQL) query. In Kusto Data, the ClientRequestProperties class contains methods to set, clear, and check the presence of such query parameters.

The set parameter method provides overloads for common data types, such as string and long. For all other types, express the value as a KQL literal in string format, and make sure that the declare query_parameters statement declares the correct scalar data type.

For example usage, see Use query parameters to protect user input.

Named properties

The following table describes the named properties available in the ClientRequestProperties class. Each property translates to an HTTP header and can also be set when making a REST API request.

Property name HTTP header Description
ClientRequestId or client_request_id (based on language-specific naming conventions) x-ms-client-request-id An ID used to identify the request. This specification is helpful for debugging and may be required for specific scenarios like query cancellation.

We recommend using the format ClientApplicationName.ActivityType;UniqueId. If the client doesn't specify a value for this property, a random value is assigned.
Application x-ms-app The name of the client application that makes the request. This value is used for tracing.

If the client doesn't specify a value for this property, the property is automatically set to the name of the process hosting the Kusto Data library. To specify this property in a Kusto connection string, use the Application Name for Tracing property.
User x-ms-user The identity of the user that makes the request. This value is used for tracing.

To specify this property in a Kusto connection string, use the User Name for Tracing property.

Caution

The client request ID property is recorded for diagnostics. Avoid sending sensitive data like personally identifiable or confidential information.

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