Error
Error Code:
2820
SAP S/4HANA Error 2820: Undeclared SQLScript Variable
Description
This error indicates that a variable used within an SAP HANA SQLScript procedure, function, or anonymous block has not been formally declared before its first use. It typically occurs during the compilation or execution of SQLScript code when the HANA database cannot resolve a variable's definition, preventing the successful execution of the script.
Error Message
ERR_SQLSCRIPT_VARIABLE_NOT_DECLARED
Known Causes
3 known causesMissing Variable Declaration
The variable was used in the SQLScript code without a preceding `DECLARE` statement to define its name and data type.
Typo or Misspelling
The variable name was mistyped or misspelled during its usage, causing the system to not recognize a declared variable.
Incorrect Variable Scope
The variable was declared within a specific block or scope but then referenced outside of that scope where it is not accessible.
Solutions
4 solutions available1. Declare Missing Variables in SQLScript easy
Identify and declare the undeclared variable in the SQLScript procedure or function.
1
Identify the specific SQLScript object (e.g., stored procedure, function) that is causing the error. You can often find this in the application log or trace.
2
Examine the SQLScript code of the identified object. Look for any variable that is being used before it has been declared using the `DECLARE` keyword.
DECLARE my_variable INT;
-- ... other code ...
my_variable := 10; -- This line might be causing the error if my_variable wasn't declared above.3
Add a `DECLARE` statement at the beginning of the SQLScript object for each missing variable, specifying its data type.
DECLARE <variable_name> <data_type>;4
Re-activate the SQLScript object after adding the declarations.
2. Correct Typographical Errors in Variable Names easy
Ensure variable names are spelled consistently throughout the SQLScript.
1
Locate the SQLScript object that triggered the error.
2
Carefully review all variable names within the script. Pay close attention to capitalization, spelling, and underscores.
DECLARE customer_id INT;
-- ...
SELECT * FROM orders WHERE customerid = customer_id; -- 'customerid' vs 'customer_id' would cause this error.3
Correct any inconsistencies or typos in variable names to match their declarations.
4
Re-activate the SQLScript object.
3. Verify Variable Scope and Declaration Location medium
Ensure variables are declared within the correct scope and at the beginning of the procedure/function.
1
Identify the SQLScript object containing the error.
2
Confirm that all variables used within the SQLScript are declared at the beginning of the procedure or function, before any executable statements.
CREATE PROCEDURE my_proc() LANGUAGE SQLSCRIPT AS
BEGIN
DECLARE my_var INT;
-- Correct: declaration before usage
my_var := 5;
-- Incorrect: If 'another_var' was used here without prior declaration.
-- another_var := 10;
END;3
If a variable is intended to be local to a specific block (e.g., within an `IF` or `LOOP`), ensure it's declared within that block. However, for this specific error (undeclared), it usually points to a global declaration missing.
CREATE PROCEDURE my_proc() LANGUAGE SQLSCRIPT AS
BEGIN
IF 1 = 1 THEN
DECLARE temp_var INT;
temp_var := 100;
END IF;
-- 'temp_var' is only accessible within the IF block.
END;4
Re-activate the SQLScript object.
4. Review SAP Notes and SAP Support Portal medium
Check for known issues or specific SAP Notes related to this error in your S/4HANA version.
1
Log in to the SAP Support Portal (support.sap.com).
2
Navigate to the 'SAP Notes' section and search for '2820', 'ERR_SQLSCRIPT_VARIABLE_NOT_DECLARED', or relevant keywords combined with your S/4HANA version.
3
Analyze the search results for any SAP Notes that describe the error and provide specific solutions, workarounds, or patches.
4
If a relevant SAP Note is found, follow its instructions, which might involve applying a correction, updating a component, or implementing a specific coding change.