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Description

This error indicates that an attempt was made to create a database schema using a name that is already in use within the SAP S/4HANA system. It commonly occurs during database operations, system configuration, or custom development when uniqueness constraints are violated, preventing the new schema from being created.

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Error Message

ERR_SQL_EXST_SCHEMA: Cannot use duplicate schema name

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Known Causes

3 known causes

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Manual Schema Creation Attempt

A user manually attempted to create a new database schema with a name that already exists in the SAP S/4HANA system.

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Automated Script or Deployment Failure

An automated script, deployment process, or system update tried to create a schema with a name that is already present in the database.

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System Configuration or Migration Conflict

During a system configuration, data migration, or system refresh, a component tried to define a schema using an existing name.

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Solutions

3 solutions available

1. Identify and Rename Conflicting Schema medium

Locate the existing schema with the same name and rename it to resolve the conflict.

1

Connect to your SAP HANA database instance using a SQL client (e.g., SAP HANA Studio, hdbsql).

2

Execute a query to list all existing schemas and identify the one causing the conflict. The error message usually provides the problematic schema name.

SELECT SCHEMA_NAME FROM SYS.SCHEMAS WHERE SCHEMA_NAME = '<conflicting_schema_name>';

3

If the conflicting schema is found and it's not a critical system schema that should not be altered (e.g., SYSTEM, SYS, SYSIQ), rename it. **Caution:** Ensure you understand the implications of renaming a schema before proceeding. This might involve updating application configurations or other dependencies.

ALTER SCHEMA "<conflicting_schema_name>" RENAME TO "<new_unique_schema_name>";

4

Retry the operation that caused the error. If the conflict was due to a temporary or incorrect schema creation, this should resolve it.

2. Verify Application/Installation Configuration medium

Review the configuration settings of the SAP S/4HANA component or application attempting to create the schema to ensure it's using a unique name.

1

Identify the specific SAP S/4HANA component, installation, or upgrade process that is triggering this error.

2

Locate the configuration files or parameters related to schema creation for that component. This might be within the SAP Landscape Transformation (SLT) configuration, installation parameters for a new module, or upgrade preparation steps.

3

Examine the schema name specified in the configuration. It's likely that this name is already in use by another schema in the target SAP HANA database.

4

Modify the configuration to use a different, unique schema name. Consult the documentation for the specific SAP S/4HANA component for guidance on valid schema naming conventions and best practices.

5

Re-run the installation, upgrade, or configuration process with the corrected schema name.

3. Clean Up Orphaned or Unused Schemas advanced

Remove any schemas that are no longer in use but still exist in the database.

1

Connect to your SAP HANA database instance using a SQL client.

2

Query the `SYS.SCHEMAS` catalog view to identify all schemas. Pay close attention to schemas that might have been created for temporary purposes, failed installations, or are associated with decommissioned applications.

SELECT SCHEMA_NAME, CREATED, LAST_ALTERED FROM SYS.SCHEMAS ORDER BY CREATED DESC;

3

For each identified schema, investigate its purpose and dependencies. Check if any active applications or processes rely on it. You can use `M_OBJECTS` or `M_TABLES` to see if there's any activity within a schema.

SELECT COUNT(*) FROM M_OBJECTS WHERE SCHEMA_NAME = '<schema_to_investigate>';

4

If a schema is confirmed to be unused and safe to remove, drop it. **Extreme Caution:** Dropping a schema is a destructive operation and will delete all objects within it. Ensure you have backups and complete confidence before proceeding.

DROP SCHEMA "<unused_schema_name>" CASCADE;

5

After cleaning up unused schemas, retry the operation that was previously failing due to the duplicate schema name conflict.

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Related Errors

5 related errors

SAP S/4HANA Error 386: Duplicate Schema Name Conflict