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Description

This error indicates that a previously used or configured SQL plan stability feature is now deprecated in the current version of SAP S/4HANA or its underlying database. It typically occurs when the system attempts to utilize an obsolete plan stability mechanism, leading to execution failures.

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Error Message

ERR_SQL_PLAN_STABILITY_DEPRECATED

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Known Causes

3 known causes

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Obsolete Database Feature Usage

The underlying database or SAP S/4HANA system is attempting to utilize a SQL plan stability feature that has been removed or superseded.

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System Upgrade Incompatibility

An upgrade of SAP S/4HANA or its database introduced changes that deprecated the plan stability mechanism being referenced.

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Custom Code Reference

Custom ABAP code or development objects might contain hardcoded references or calls to deprecated SQL plan stability APIs.

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Solutions

3 solutions available

1. Migrate to SQL Plan Management (SPM) advanced

Replace deprecated SQL Plan Stability with the modern and supported SQL Plan Management.

1

Identify SQL statements that are currently using the deprecated SQL Plan Stability feature. This can be done by analyzing system logs and tracing tools (e.g., ST05, SQL Trace). Look for entries related to plan stability configuration or issues.

2

Understand the current SQL plan for the identified statements. Use the SQL Trace (ST05) or SQL Monitor (SQLMON) to capture the execution plans. Note down the specific plans that are being used.

3

Create SQL Plan Management (SPM) entries for these critical SQL statements. SPM allows you to bind specific execution plans to SQL statements, ensuring consistent performance. This is done using the `CREATE SQL PLAN` statement in your database.

CREATE SQL PLAN FOR STATEMENT 'SELECT * FROM YOUR_TABLE WHERE COLUMN = ?' USING PLAN 'your_captured_plan_id';

4

Test the performance of the migrated SQL statements thoroughly. Monitor query execution times and resource consumption to ensure that the SPM entries are providing the expected stability and performance benefits.

5

Remove the deprecated SQL Plan Stability configurations once SPM is successfully implemented and validated.

2. Review and Optimize SQL Statements medium

Address underlying performance issues that might have necessitated the use of plan stability in the first place.

1

Analyze the performance of SQL statements that are exhibiting performance regressions or inconsistencies. Use SAP's performance analysis tools like SQL Monitor (SQLMON) or transaction ST05 (SQL Trace).

2

Examine the execution plans of these problematic SQL statements. Look for signs of inefficient access paths, full table scans, or suboptimal join strategies.

3

Identify missing or outdated indexes. Create new indexes or modify existing ones to improve query performance. Consult with SAP functional consultants to understand the data access patterns.

CREATE INDEX idx_your_table_column ON your_table (column);

4

Rewrite SQL statements to be more efficient. This might involve simplifying complex joins, using appropriate filtering conditions, or leveraging database-specific features. Ensure the SQL adheres to S/4HANA best practices.

5

Ensure that database statistics are up-to-date. Outdated statistics can lead the optimizer to choose suboptimal execution plans. Schedule regular statistics updates.

CALL SYSPROC.NNTSTATS('YOUR_TABLE', 'ALL'); -- Example for Db2, syntax varies by database

3. Update SAP S/4HANA and Database Software easy

Ensure your system is running on supported versions with the latest fixes.

1

Check for the latest SAP Notes and Support Packages for your SAP S/4HANA version. These often contain corrections related to database performance and optimizer behavior.

2

Verify that your underlying database software (e.g., SAP HANA, Oracle, Db2) is at the latest patch level or supported version. Database vendors frequently release updates that improve performance and address compatibility issues.

3

Apply the relevant SAP Notes and database patches. This may involve downtime, so plan accordingly.

4

After applying updates, re-test the performance of critical applications and SQL statements to confirm the issue is resolved.

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Related Errors

5 related errors

SAP S/4HANA Error 690: SQL Plan Stability Deprecated