Error
Error Code:
1342
SAP S/4HANA Error 1342: SQLScript Attribute Alias Conflict
Description
This error occurs in SAP S/4HANA within SQLScript calculations (e.g., CE functions) when an attribute (column) is assigned an alias that is identical to another existing attribute name within the same projection or calculation step. It typically arises during the definition or execution of calculation views, analytic views, or stored procedures involving complex data transformations where column renaming is performed.
Error Message
ERR_SQLSCRIPT_CE_CALC_ATTRIBUTE_AND_ALIAS_ARE_SAME
Known Causes
4 known causesDirect Naming Conflict
A column (attribute) within a SQLScript CE function is given an alias that is identical to an existing attribute name in the same projection or calculation step. 💻
Case Sensitivity Discrepancy
While the underlying database might be case-insensitive, the SQLScript interpreter or specific functions might treat attribute and alias names as case-sensitive, leading to perceived conflicts. ⚙
Re-aliasing an Existing Alias
Attempting to rename an already aliased column with a name that inadvertently conflicts with an original or previously aliased column within the same processing block. 💻
Development or Refactoring Error
During development or refactoring of complex SQLScript logic, an attribute might be inadvertently renamed to an existing attribute's name, or an alias might conflict due to copy-pasting code snippets. ⚠
Solutions
3 solutions available1. Rename Conflicting Attribute or Alias in Calculation View medium
Identify and rename either the attribute or its alias within the affected calculation view to resolve the name collision.
1
Access the SAP HANA XS Advanced Model Development Tools (e.g., SAP Business Application Studio or Web IDE for SAP HANA).
2
Locate the specific Calculation View that is causing the error. This is typically found within your project's `src` or `gen` folders, usually with a `.hdbcalculationview` extension.
3
Open the Calculation View in the graphical editor or the XML/JSON definition.
4
Navigate to the node (e.g., Projection, Aggregation) where the attribute and its alias are defined. Examine the 'Attributes' or 'Output Columns' section.
5
Identify the attribute or alias that shares the same name. The error message `ERR_SQLSCRIPT_CE_CALC_ATTRIBUTE_AND_ALIAS_ARE_SAME` indicates this conflict.
6
Rename either the attribute or its alias to a unique name. It's generally recommended to rename the alias if the attribute name is derived from a source table column and is meaningful.
Example: If you have an attribute named 'SalesAmount' and an alias also named 'SalesAmount', rename the alias to 'SalesAmount_Alias' or similar.7
Save the changes to the Calculation View definition.
8
Deploy the modified Calculation View to your SAP HANA database.
9
Re-run the query or application that triggered the error to verify the issue is resolved.
2. Review and Correct SQLScript Logic in Calculation View advanced
Examine the SQLScript code within the calculation view's logic for any explicit or implicit naming conflicts.
1
Access the SAP HANA XS Advanced Model Development Tools.
2
Locate the Calculation View and open its definition.
3
If the Calculation View uses embedded SQLScript (e.g., in a Script node or for complex logic), review the SQLScript code carefully.
4
Pay close attention to variable declarations, column aliases assigned within `SELECT` statements, and any other constructs that define names within the script.
Example: In a script node, a SELECT statement might look like: `SELECT col1 AS MyColumn, col2 AS MyColumn FROM my_table;` This would cause a conflict if 'MyColumn' is also used elsewhere as an attribute or alias.5
Ensure that all column aliases defined within the SQLScript are unique and do not conflict with existing attribute names or other aliases within the same scope.
Corrected example: `SELECT col1 AS MyColumn_1, col2 AS MyColumn_2 FROM my_table;`6
If the conflict arises from a calculated column or expression within the SQLScript, ensure the alias assigned to that expression is unique.
7
Save the changes to the Calculation View.
8
Deploy the Calculation View.
9
Test the affected query or application.
3. Check for Implicit Alias Generation in Data Sources medium
Investigate if the conflict originates from data sources used within the calculation view, where implicit aliases might be generated.
1
Open the Calculation View in the SAP HANA XS Advanced Model Development Tools.
2
Examine the data sources (e.g., tables, views, other calculation views) that are used as input to the nodes within your calculation view.
3
For each data source, check its output columns. Sometimes, if a source column has special characters or is a reserved keyword, HANA might implicitly generate an alias for it. This implicit alias can conflict with explicitly defined aliases or attributes.
4
If you suspect an implicit alias is causing the issue, try to explicitly alias the problematic column in the data source itself (if it's a view or another calculation view) or in the projection node that consumes it.
Example: If a source column `_col-1` is implicitly aliased to `COL_1` and you have another `COL_1`, you might explicitly alias `_col-1` to `SOURCE_COL_1` in the projection.5
Alternatively, if the source is a table, you might need to create an intermediate view that renames the problematic column to avoid implicit generation.
6
Save and deploy the Calculation View.
7
Test the functionality.