Table of Contents

Building blocks of a custom operator

A custom operator implements predefined interfaces that can be considered building blocks as they add the desired functionality to the operator.

The IGQIRowOperator and IGQIColumnOperator interfaces are used to identify the class as a custom operator. At least one of them should be implemented for the class to be detected by GQI as a custom operator.

All other interfaces add additional functionality.

Interfaces in a custom operator

The available interfaces are:

  • IGQIColumnOperator: Makes it possible to manipulate the columns.

  • IGQIRowOperator: Makes it possible to manipulate the rows.

  • IGQIInputArguments: Retrieves input from the user through input arguments.

  • IGQIOnDestroy: Can be implemented to clean up resources after it has been used (available from DataMiner 10.4.5/10.5.0 onwards).

  • IGQIOnInit: Provides a way to initialize the custom operator with access to dependencies like the DMS (available from DataMiner 10.4.5/10.5.0 onwards).

  • IGQIOptimizableOperator: Used in order to optimize the custom operator based on other operators in a query.

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