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Description

This error indicates that a SQLScript statement or feature producing varying results (non-deterministic) is being used in a context requiring consistent output. It typically occurs in SAP HANA views, calculated columns, or specific database procedures where data integrity demands deterministic operations.

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Error Message

ERR_SQLSCRIPT_NOT_ALLOWED_NON_DETERMINISTIC_FEATURE

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Known Causes

3 known causes

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Non-Deterministic Functions in Views 💻

Employing functions like NOW(), RAND(), or CURRENT_TIMESTAMP within SAP HANA calculation views or calculated columns, where the output must be consistent across executions.

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External or Non-Deterministic UDFs ⚙

Invoking user-defined functions or external procedures that are inherently non-deterministic or not explicitly marked as such, in a context requiring consistent results.

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Restricted SQLScript Contexts 🔒

Using non-deterministic SQLScript features within specific database objects or procedures, such as read-only views, which strictly enforce deterministic behavior for data integrity.

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Solutions

3 solutions available

1. Identify and Refactor Non-Deterministic SQLScript Features advanced

Locate the specific non-deterministic function or statement and replace it with a deterministic alternative.

1

Analyze the SQLScript code that is triggering the error. This often involves examining custom ABAP code, HANA calculation views, or stored procedures.

2

Identify common non-deterministic features. These include functions that rely on system time (e.g., `NOW()`, `SYSDATE`), random number generators, or external system calls. Example of a non-deterministic function: `SELECT NOW() FROM DUMMY;`

SELECT NOW() FROM DUMMY;

3

Refactor the code to use deterministic alternatives. For example, if system time is required, pass it as an input parameter to the SQLScript. If a random number is needed, consider generating it in ABAP before calling the SQLScript.

-- Example: Passing system date as parameter (assuming it's called from ABAP)
-- In ABAP, you would pass sy-datum to this procedure.
CREATE PROCEDURE my_deterministic_proc (IN input_date DATE) AS
BEGIN
  -- Use input_date instead of NOW() or SYSDATE
  INSERT INTO my_table (date_col) VALUES (input_date);
END;

4

Recompile or re-deploy the modified SQLScript object.

2. Review and Adjust HANA Calculation View Properties medium

Modify the properties of HANA Calculation Views to avoid non-deterministic SQLScript usage.

1

Open the affected HANA Calculation View in the SAP HANA Application Lifecycle Management (HALM) or SAP Business Application Studio (BAS).

2

Navigate to the 'Properties' or 'Settings' of the Calculation View.

3

Look for settings related to 'SQLScript' or 'Execution' and ensure that options permitting non-deterministic features are disabled or set to be restrictive. The exact property name may vary slightly depending on the HANA version and development environment.

4

If the view uses a Scripted Calculation View and contains non-deterministic SQLScript, you will need to refactor the script within the view as per Solution 1.

5

Save and activate the Calculation View.

3. Isolate and Remove Direct Calls to Forbidden Functions easy

Find and remove any direct use of non-deterministic built-in HANA functions.

1

If you are directly calling a HANA SQLScript function that is known to be non-deterministic (e.g., `CURRENT_TIMESTAMP`, `RAND()`), identify where this call is occurring.

SELECT CURRENT_TIMESTAMP FROM DUMMY;

2

Replace the non-deterministic function with a deterministic alternative. If you need the current timestamp, pass it as a parameter from the calling application (e.g., ABAP).

-- Assuming 'current_time_param' is passed from the application
SELECT :current_time_param FROM DUMMY;

3

Test the modified code to ensure it functions as expected.

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Related Errors

5 related errors

SAP S/4HANA Error 1350: Forbidden SQLScript Feature