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Description

The ORA-30129 error in Oracle Database indicates that a function call has received an invalid argument. This typically occurs during execution of PL/SQL code or SQL queries when the data type or value passed to a function does not match what the function expects.

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Error Message

ORA-30129: invalid function argument received

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Known Causes

4 known causes

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Incorrect Data Type

The argument passed to the function has a different data type than the function expects. This can happen with implicit or explicit type conversions.

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Invalid Value

The argument passed to the function is of the correct data type but contains an invalid value. For example, passing a negative number to a function that only accepts positive numbers.

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Null Argument

The function does not allow NULL arguments, but a NULL value was passed. Some functions may treat NULL arguments differently or raise an error.

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Argument Out of Range

The argument value is outside the acceptable range defined for the function. This is common with functions that have restrictions on input values.

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Solutions

4 solutions available

1. Verify Function Arguments and Data Types easy

Ensure the arguments passed to the function match its expected data types and values.

1

Identify the specific function call that is causing the ORA-30129 error. This usually involves checking the SQL statements or PL/SQL code that directly precedes the error.

2

Consult the Oracle documentation for the function in question. Pay close attention to the argument list, their expected data types, and any constraints or valid value ranges.

SELECT name, type, overload FROM user_arguments WHERE object_name = 'YOUR_FUNCTION_NAME';

3

Compare the data types and values of the arguments you are passing with the function's definition. Implicit data type conversions can sometimes lead to unexpected results.

-- Example: If function expects a NUMBER and you pass a string that cannot be converted.
-- Check the data type of the variable or literal being passed.

4

If the argument is a variable, ensure it is populated with a valid value before calling the function. If it's a literal, double-check its format and content.

-- Example: Ensure a date literal is in the correct format (e.g., TO_DATE('2023-10-27', 'YYYY-MM-DD'))

2. Check for NULL Arguments in Functions Requiring Non-NULL Values easy

Many functions will error if passed a NULL argument when one is not permitted.

1

Review the function call and identify if any of the arguments being passed are NULL.

2

Consult the Oracle documentation for the specific function to determine if NULL arguments are allowed. Many built-in functions and user-defined functions explicitly disallow NULL inputs for certain parameters.

3

Implement checks to ensure that arguments are not NULL before calling the function. Use NVL, COALESCE, or conditional logic to provide a default value or handle the NULL case appropriately.

-- Example for a hypothetical function that doesn't accept NULL:
IF my_variable IS NOT NULL THEN
  result := your_function(my_variable);
ELSE
  -- Handle the NULL case, e.g., assign a default or raise a different error
  result := default_value;
END IF;

4

For user-defined functions, inspect the function's PL/SQL code to see how it handles NULL inputs. It might be explicitly raising an error or encountering an issue during processing.

-- Example within a PL/SQL function:
IF input_param IS NULL THEN
  RAISE_APPLICATION_ERROR(-20001, 'Input parameter cannot be NULL.');
END IF;

3. Investigate User-Defined Function Logic and Data Handling medium

Thoroughly review the PL/SQL code of custom functions for potential errors.

1

Identify the user-defined function that is triggering the ORA-30129 error. This might require examining the call stack if the error occurs within a larger PL/SQL block.

2

Retrieve the source code of the user-defined function.

SELECT text FROM all_source WHERE owner = 'YOUR_SCHEMA' AND name = 'YOUR_FUNCTION_NAME' ORDER BY line;

3

Carefully examine the function's logic, paying close attention to any internal calls to other functions, cursors, or complex SQL statements. Look for situations where an argument might be inadvertently manipulated or passed incorrectly.

4

Add debugging statements (e.g., DBMS_OUTPUT.PUT_LINE) within the function to trace the values of arguments and intermediate variables at different points in its execution. This can help pinpoint the exact line or condition causing the issue.

-- Example within the function:
DBMS_OUTPUT.PUT_LINE('Value of arg1: ' || arg1);
-- ... rest of the function logic ...

5

Test the function with various valid and invalid input combinations outside of its normal execution context to isolate the problematic scenario.

SELECT your_function_name(arg1_value, arg2_value) FROM dual;

4. Review Oracle Version-Specific Function Behavior and Bugs advanced

Check for known issues or changes in function behavior across different Oracle database versions.

1

Determine the exact Oracle database version you are running (e.g., 19c, 21c).

SELECT * FROM v$version;

2

Search the Oracle Support (My Oracle Support) website for known bugs or issues related to the specific function and your Oracle version that might cause an ORA-30129 error.

3

Review the Oracle documentation for any deprecated or changed functionality related to the function in your specific version. Sometimes, arguments that were valid in older versions may no longer be supported.

4

If a known bug is identified, check for available patches or workarounds provided by Oracle. Applying the latest patchset for your Oracle version might resolve the issue.

5

Consider testing the problematic code on a different Oracle version or a patched environment if possible, to rule out version-specific problems.

Oracle ORA-30129: Invalid Argument