Error

Error Code: 335

SAP S/4HANA Error 335: Duplicate Field Alias Name

📦 SAP S/4HANA

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Description

Error 335, ERR_SQL_EXST_ALIAS, indicates that you have attempted to define or use a field alias name that already exists within the current SQL statement or data definition context. This typically occurs during database operations such as creating views, defining calculated fields, or constructing complex queries where column aliases are specified.

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Error Message

ERR_SQL_EXST_ALIAS

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Known Causes

4 known causes

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Redundant Alias Definition

An attempt was made to assign an alias to a field or expression using a name that is already in use by another field or expression within the same SQL query or data object definition.

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Copy-Paste Code Errors

Reusing SQL code snippets without thoroughly reviewing and updating field aliases can lead to conflicts where the same alias is inadvertently defined multiple times.

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Ambiguous Column Renaming

When renaming columns in a derived table or subquery, an alias might conflict with a column name or another alias defined at a higher or parallel scope.

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Reserved Keyword Conflict

Although less common, an alias might conflict with a reserved keyword or system-defined alias within SAP HANA SQL, especially in specific contexts.

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Solutions

3 solutions available

1. Identify and Rename Duplicate Aliases in CDS Views medium

Locate and correct duplicate field aliases within your custom or standard CDS views.

Access the SAP Fiori Launchpad and navigate to the 'Core Data Services (CDS) View' app.

Search for CDS views that are potentially causing the conflict. This might involve reviewing recently developed or modified views.

Open the relevant CDS view in the ABAP Development Tools (ADT) for Eclipse. Alternatively, you can use the 'View Browser' app in the Fiori Launchpad for a quick overview.

Examine the `SELECT` list within the CDS view definition. Look for instances where the same alias is assigned to different fields or where an alias clashes with a field name from a joined table.

Example of a potential issue:

@AbapCatalog.sqlViewName: 'MYVIEW'
@AbapCatalog.compiler.CompareFilter: true
@AccessControl.authorizationCheck: #CHECK
@VDM.viewType: #BASIC
@Analytics.dataCategory: #FACT
define view entity Z_MY_DUPLICATE_ALIAS_VIEW as select from my_table as t1
  left outer join another_table as t2 on t1.key = t2.key {
  key t1.field1 as my_alias,
  t1.field2,
  t2.field3 as my_alias  -- Duplicate alias here
}

Rename the duplicate alias to a unique name. It's good practice to adopt a consistent naming convention for aliases.

Corrected example:

@AbapCatalog.sqlViewName: 'MYVIEW'
@AbapCatalog.compiler.CompareFilter: true
@AccessControl.authorizationCheck: #CHECK
@VDM.viewType: #BASIC
@Analytics.dataCategory: #FACT
define view entity Z_MY_DUPLICATE_ALIAS_VIEW as select from my_table as t1
  left outer join another_table as t2 on t1.key = t2.key {
  key t1.field1 as my_alias_t1,
  t1.field2,
  t2.field3 as my_alias_t2  -- Renamed alias

Save and activate the modified CDS view.

Re-run the transaction or process that triggered the error to verify the fix.

2. Analyze SQL Trace for Alias Conflicts medium

Use SQL trace to pinpoint the exact SQL statement causing the duplicate alias error.

Before executing the problematic transaction, enable SQL trace. You can do this using transaction ST05.

In ST05, select 'SQL Trace' and click 'Activate Trace'.

Execute the transaction or process that produces the 'ERR_SQL_EXST_ALIAS' error.

Go back to ST05, select 'SQL Trace', and click 'Deactivate Trace'.

Click 'Display Trace'.

Filter the trace results for SQL statements. Look for the statement that is explicitly generating the 'ERR_SQL_EXST_ALIAS' error or statements that are being executed just before the error.

Examine the SQL statement. The error message often provides clues about the problematic alias. You'll need to identify which CDS view or other SQL object is generating this statement and where the duplicate alias exists.

Example of a trace entry showing the error:

SELECT ... FROM "MY_TABLE" AS "T1" LEFT OUTER JOIN "ANOTHER_TABLE" AS "T2" ON "T1"."KEY" = "T2"."KEY" WHERE ... GROUP BY "T1"."FIELD1" AS "MY_ALIAS", "T2"."FIELD3" AS "MY_ALIAS"

Once identified, proceed to correct the duplicate alias in the source object (e.g., CDS view) as described in the previous solution.

3. Review and Correct Standard SAP CDS View Annotations advanced

Address conflicts in standard SAP CDS views by applying corrections or notes.

If the error occurs with a standard SAP S/4HANA functionality, consult SAP Notes and KBA (Knowledge Base Articles) related to 'ERR_SQL_EXST_ALIAS' and the specific transaction or application you are using.

Search the SAP Support Portal using keywords like 'ERR_SQL_EXST_ALIAS', 'duplicate field alias', and the relevant S/4HANA version or application component.

Identify any relevant SAP Notes that provide corrections for standard CDS views.

Apply the recommended SAP Notes. This might involve implementing corrections directly in your system or updating support packages.

If no SAP Note is available, you may need to create an incident for SAP Support to investigate the issue within the standard SAP code.

After applying corrections or receiving guidance from SAP Support, test the functionality thoroughly.

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Related Errors

5 related errors