Error
Error Code:
2851
SAP S/4HANA Error 2851: SQLScript Output Parameter Type Mismatch
Description
This error indicates that a SQLScript procedure or function is attempting to return a table-like result through an output parameter that has not been correctly defined as a table type. It typically occurs during the activation or execution of SQLScript objects in SAP S/4HANA that utilize SAP HANA's SQLScript capabilities.
Error Message
ERR_SQLSCRIPT_OUTPUT_PARAM_NOT_TABLE_TYPE
Known Causes
4 known causesIncorrect Output Parameter Declaration
The output parameter in the SQLScript procedure or function was declared with a scalar data type (e.g., VARCHAR, INT) instead of a table type.
Missing Table Type Definition
A custom table type intended for the output parameter was referenced in the SQLScript, but the table type itself was not properly created or activated in the database schema.
Mismatch in Calling Context
The application or calling statement expects a table type output from the procedure, but the procedure's output parameter is defined to return a different type.
Typographical or Syntax Error
A simple typo in the parameter declaration or table type name can prevent the system from recognizing the intended table type correctly.
Solutions
3 solutions available1. Align Output Parameter with Table Type Declaration easy
Ensure the SQLScript's output parameter is declared as a table type that matches the actual data being returned.
1
Identify the SQLScript that is raising the error. This is typically done by examining the SAP application logs (e.g., ST22 for dumps, SM21 for system logs) or the database trace files.
2
Locate the `OUT` or `TABLE` parameter declaration within the SQLScript's `CREATE PROCEDURE` or `CREATE FUNCTION` statement.
3
Verify that the declared type of this output parameter is a table type (e.g., `TABLE TYPE <table_type_name>`).
4
If the output parameter is declared as a scalar type (e.g., `VARCHAR`, `INTEGER`) but the SQLScript is attempting to return multiple rows or columns, you must change the declaration to a table type.
5
If the output parameter is declared as a table type, ensure that the table type itself is correctly defined and exists in the database schema.
6
If the SQLScript is returning data that implicitly forms a table structure, but the output parameter is not explicitly defined as a table type, you need to explicitly define it. For example, if your script looks like this (simplified):
CREATE PROCEDURE "MY_SCHEMA"."MY_PROCEDURE" (OUT MY_OUT_PARAM ???) AS
BEGIN
SELECT COL1, COL2 FROM MY_TABLE;
END;7
You would need to define a table type first:
CREATE TYPE "MY_SCHEMA"."MY_TABLE_TYPE" AS TABLE (
COL1 VARCHAR(10),
COL2 INTEGER
);8
And then modify the procedure to use it:
CREATE PROCEDURE "MY_SCHEMA"."MY_PROCEDURE" (OUT MY_OUT_PARAM "MY_SCHEMA"."MY_TABLE_TYPE") AS
BEGIN
SELECT COL1, COL2 INTO MY_OUT_PARAM FROM MY_TABLE;
END;2. Correct Data Population for Table Output medium
Ensure the SQLScript correctly populates the declared table output parameter with data.
1
After confirming the output parameter is declared as a table type, examine the SQLScript's body to see how data is being assigned to this parameter.
2
The most common way to populate a table output parameter is using the `SELECT ... INTO` syntax. Ensure that the `SELECT` statement's column list exactly matches the columns defined in the table type, both in name and order, and that the data types are compatible.
3
Example of incorrect population (if `MY_OUT_PARAM` is a table type with `COL1` and `COL2`):
CREATE PROCEDURE "MY_SCHEMA"."MY_PROCEDURE" (OUT MY_OUT_PARAM "MY_SCHEMA"."MY_TABLE_TYPE") AS
BEGIN
-- This will fail if MY_OUT_PARAM expects COL1, COL2 but only COL1 is selected
SELECT COL1 FROM MY_TABLE INTO MY_OUT_PARAM;
END;4
Example of correct population:
CREATE PROCEDURE "MY_SCHEMA"."MY_PROCEDURE" (OUT MY_OUT_PARAM "MY_SCHEMA"."MY_TABLE_TYPE") AS
BEGIN
SELECT COL1, COL2 FROM MY_TABLE INTO MY_OUT_PARAM;
END;5
If your SQLScript uses cursor variables or other methods to build the result set, ensure they are ultimately assigned or cast to the declared table output parameter correctly.
6
Consider using `CALL` statements to execute other stored procedures or functions that return table types and assign their results to your output parameter, ensuring compatibility.
3. Review SAP Application Logic Interfacing with SQLScript medium
Investigate the SAP application code (e.g., ABAP) that calls the SQLScript for potential mismatches in how it handles the output.
1
Identify the ABAP program or function module that calls the problematic SQLScript.
2
Examine the ABAP code where the SQLScript is invoked. Look for how the output parameters are declared and handled.
3
In ABAP, table output parameters from SQLScripts are typically mapped to internal tables. Ensure that the internal table declared in ABAP has a structure that precisely matches the table type defined for the SQLScript's output parameter. This includes column names, order, and data types.
4
Example ABAP code snippet (conceptual):
DATA: lt_output_data TYPE STANDARD TABLE OF <abap_structure_matching_table_type>.
CALL "MY_SCHEMA"."MY_PROCEDURE"(
EXPORTING ...
IMPORTING MY_OUT_PARAM = lt_output_data
).
" Process lt_output_data ...5
If the ABAP structure does not match the SQLScript's table type, you will need to either modify the ABAP structure or, more ideally, ensure the SQLScript's table type is correctly defined to match the intended ABAP structure.
6
Check for any explicit type conversions or mappings in the ABAP code that might be causing a mismatch between the data received from the SQLScript and the internal table's expected format.