QlikView Circular Reference

A circular reference in QlikView is a type of error that occurs when a calculation depends on itself. This can occur when there is a chain of dependencies between different fields, and one of the fields refers back to itself or to a field that depends on it.

For example, consider the following simple expression:

A = B + C

B = D + E

C = F + G

D = A

In this case, there is a circular reference between field A and field D, because A depends on B, which depends on D, which depends on A. This creates an infinite loop, and QlikView will not be able to calculate the values of these fields.

To resolve a circular reference in QlikView, you will need to identify the source of the circular reference and modify your calculation so that it does not depend on itself or on other fields in the circular reference chain. This may involve breaking the chain of dependencies or using different calculations that do not rely on circular references.

It’s also important to note that circular references can cause performance issues, as QlikView will need to repeatedly recalculate the values of the fields involved in the circular reference. To avoid these issues, it’s best to design your calculations in a way that avoids circular references whenever possible.

A circular reference in QlikView occurs when a calculation or a field is dependent on itself, creating a loop that cannot be resolved. This can happen when a field is used to calculate another field, and that second field is used to calculate the first field.

Circular references can cause problems in a QlikView document, such as slow performance, incorrect calculations or even crashes. They can also make it difficult to understand the data and the relationships between the fields.

There are several ways to identify and resolve circular references in QlikView:

• The QlikView Script Debugger can be used to identify circular references in the script. It will highlight the circular references and provide information about the fields and calculations that are causing the problem.
• The Document Analyzer can be used to identify circular references in the data model. It will show the fields and calculations that are involved in the circular reference, and it will provide suggestions for resolving the problem.
• The field dependency matrix can be used to identify circular references in the data model. It will show the fields and calculations that are involved in the circular reference, and it will provide suggestions for resolving the problem.

To resolve a circular reference, you can change the calculation or the data model to break the loop, or you can create a variable to store the intermediate calculation results.

In summary, A circular reference in QlikView is a situation when a calculation or a field is dependent on itself, creating a loop that cannot be resolved. This can cause problems in a QlikView document, such as slow performance, incorrect calculations or even crashes. There are several tools to identify and resolve circular references, such as the QlikView Script Debugger, the Document Analyzer, and the field dependency matrix. To resolve a circular reference, you can change the calculation or the data model to break the loop, or you can create a variable to store the intermediate calculation results.