Error
Error Code:
1335
SAP S/4HANA Error 1335: SQLScript Cyclic Dependency
Description
This error indicates that a cyclic dependency has been detected within a SQLScript runtime procedure. It occurs when objects (such as views, functions, or other procedures) reference each other in a circular fashion, preventing a clear execution order and leading to an infinite loop during processing. This typically happens in complex data transformations or analytical views within SAP S/4HANA.
Error Message
ERR_SQLSCRIPT_RUNTIME_CYCLIC_DEPENDENCY
Known Causes
3 known causesRecursive View or Function Calls
A view or function is defined in such a way that it directly or indirectly references itself, creating an inescapable loop in its definition or execution path.
Interdependent Procedures/Calculations
Two or more SQLScript procedures or calculation views are designed with mutual dependencies, where each relies on the output of the other, resulting in a circular execution flow.
Flawed Data Model Design
The underlying data model or analytical view structures inherently create circular relationships between objects, leading to dependency issues at runtime.
Solutions
3 solutions available1. Identify and Refactor Cyclic Dependencies advanced
Analyze the SQLScript code to pinpoint and break the circular references between procedures, functions, or tables.
1
Review the SQLScript code that is causing the error. This typically involves stored procedures, functions, or views that call each other in a loop.
2
Use the SAP HANA Studio or SAP Business Application Studio to visualize the dependencies. Look for call chains where Procedure A calls Procedure B, and Procedure B calls Procedure A (or a longer chain that eventually loops back).
3
Refactor the code to break the cycle. This might involve:
4
1. **Introduce an intermediary procedure or function:** Create a new object that handles the common logic or orchestrates the calls, breaking the direct loop.
5
2. **Consolidate logic:** Merge the functionality of the mutually dependent objects into a single, more comprehensive object.
6
3. **Re-architect the data flow:** Rethink the process to avoid the need for cyclic calls. Perhaps a different approach to data processing or reporting is required.
7
4. **Use temporary tables or staging tables:** Move intermediate results to temporary tables to break the direct dependency during execution.
8
Deploy the refactored code and test thoroughly to ensure the cyclic dependency is resolved and the business logic still functions correctly.
2. Temporarily Disable and Re-enable Objects easy
A quick diagnostic step to see if disabling and re-enabling the involved objects can reset internal state and resolve the issue.
1
Identify the SQLScript objects (procedures, functions, views) that are part of the cyclic dependency. This might be evident from the error message or by inspecting the call stack.
2
Disable the identified objects. The exact syntax might vary slightly depending on the object type and SAP HANA version, but generally involves altering the object to be inactive or unusable.
ALTER PROCEDURE <procedure_name> DISABLE;
ALTER FUNCTION <function_name> DISABLE;
ALTER VIEW <view_name> DISABLE;3
Attempt to execute the operation that previously failed. If the error is gone, it indicates the dependency was temporarily resolved.
4
Re-enable the objects.
ALTER PROCEDURE <procedure_name> ENABLE;
ALTER FUNCTION <function_name> ENABLE;
ALTER VIEW <view_name> ENABLE;5
If the error reappears, this solution is only a temporary workaround and a more permanent fix (like refactoring) is required.
3. Check for Recursive Calls in Views medium
Investigate if any views are defined in a way that leads to recursive querying, causing the cyclic dependency.
1
Examine the definition of any views that are involved in the execution path leading to the ERR_SQLSCRIPT_RUNTIME_CYCLIC_DEPENDENCY error.
2
Look for scenarios where a view directly or indirectly references itself in its `SELECT` statement. This is a common cause of cyclic dependencies in view definitions.
3
For example, a view `V_A` might select from `V_B`, and `V_B` might select from `V_A`.
4
Refactor the view definitions to break the recursion. This might involve:
5
1. **Using Common Table Expressions (CTEs):** CTEs can help structure complex queries and sometimes avoid direct recursion.
6
2. **Introducing a separate table or materialized view:** If recursive data is truly needed, consider materializing the results in a separate table that the views can then query without recursion.
7
3. **Modifying the view logic:** Re-evaluate if the view needs to be recursive at all. Can the same information be derived differently?
8
After modifying the view definitions, recompile and test the affected queries.