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Description

The ORA-30175 error indicates that an argument passed to a procedure or function has an incorrect data type. This error commonly occurs when working with stored procedures or functions that expect specific types and an incompatible type is provided.

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Error Message

ORA-30175: invalid type given for an argument

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Known Causes

4 known causes

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Incorrect Data Type

The provided argument does not match the expected data type defined in the procedure or function signature.

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Implicit Conversion Failure

Oracle is unable to implicitly convert the provided argument to the expected data type.

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Null Value Issue

Passing a NULL value where a specific data type is required and NULLs are not permitted can trigger this error.

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Incorrect Wrapper

Using the wrong type wrapper when passing the argument.

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Solutions

4 solutions available

1. Verify Data Type Mismatch in SQL Statements easy

Ensure that the data types of values being passed to SQL functions or procedures match the expected parameter types.

1

Examine the SQL statement or PL/SQL block that is raising the ORA-30175 error.

2

Identify any function calls, procedure calls, or assignments where a value is being provided. Pay close attention to literals, variables, and expressions.

3

Compare the data type of the value being provided with the expected data type of the target argument (e.g., function parameter, procedure parameter, column).

4

If a mismatch is found, explicitly convert the data type of the provided value to match the expected type using appropriate Oracle SQL conversion functions like `TO_CHAR`, `TO_NUMBER`, `TO_DATE`, etc.

UPDATE my_table SET date_column = TO_DATE('2023-10-27', 'YYYY-MM-DD') WHERE id = 1;
-- Or in PL/SQL:
DECLARE
  v_date_str VARCHAR2(10) := '2023-10-27';
  v_date_val DATE;
BEGIN
  v_date_val := TO_DATE(v_date_str, 'YYYY-MM-DD');
  -- ... use v_date_val ...
END;

2. Correct Data Type in PL/SQL Variables and Parameters medium

Review PL/SQL code to ensure that variables and procedure/function parameters are declared with the correct Oracle data types.

1

Locate the PL/SQL package, procedure, function, or anonymous block that is causing the ORA-30175 error.

2

Examine the declarations of all local variables, parameters passed into the program unit, and return types of functions.

3

Verify that each variable and parameter is declared with an appropriate Oracle data type (e.g., `VARCHAR2`, `NUMBER`, `DATE`, `TIMESTAMP`, `CLOB`, `BLOB`, `BOOLEAN`, specific object types).

4

If a variable or parameter is declared with an incorrect or incompatible data type for the intended operation, correct its declaration.

CREATE OR REPLACE PROCEDURE process_data (p_input_value IN VARCHAR2) IS
  v_numeric_value NUMBER;
BEGIN
  -- If p_input_value was incorrectly declared as NUMBER and contains non-numeric data:
  -- Correct declaration to VARCHAR2 and then convert if necessary inside.
  v_numeric_value := TO_NUMBER(p_input_value);
  -- ... rest of the logic ...
END;
-- Example of incorrect declaration leading to error if p_input_value is not a number:
-- CREATE OR REPLACE PROCEDURE process_data (p_input_value IN NUMBER) IS -- INCORRECT
-- ...

3. Validate Data Type of Bind Variables medium

Ensure that bind variables used in SQL statements have the correct data type when passed from the application layer.

1

Identify the SQL statement in your application that is generating the ORA-30175 error. This often occurs when using bind variables for performance and security.

2

Examine how the bind variables are being prepared and passed to the Oracle database from your application's programming language (e.g., Java with JDBC, Python with cx_Oracle, C# with ODP.NET).

3

Confirm that the data type of the variable in your application code that is being bound to the SQL statement matches the expected data type of the corresponding column or parameter in Oracle.

4

If there's a mismatch, adjust the data type mapping in your application code. For example, if you're trying to bind a string to a DATE column without explicit conversion, you might need to parse the string into a date object in your application before binding, or use an Oracle-specific type for binding if supported by your driver.

// Example in Java with JDBC (conceptual):
// Assume you have a String 'dateString' and are binding to a DATE column.
// Incorrect binding might look like:
// preparedStatement.setString(1, dateString);
// Correct binding requires specifying the type or converting first:
// preparedStatement.setObject(1, someDateObject, java.sql.Types.DATE);
// Or use specific methods if available for date types.

4. Check Data Type Compatibility in Oracle Data Integrator (ODI) Mappings medium

Review ODI mappings and tasks to ensure that source and target data types are compatible for transformations and loading.

1

If you are using Oracle Data Integrator (ODI) and encountering this error during a load or integration task, examine the relevant ODI mapping.

2

Open the ODI mapping and inspect the source and target components. Focus on the columns involved in the operation that triggered the error.

3

Verify the data types defined for these columns in both the source and target datastores within ODI.

4

Ensure that Oracle's implicit or explicit type conversions are supported between the source and target data types. If a direct conversion is not possible or is causing issues, you may need to create an ODI variable, use a User Function, or modify the mapping's Expression to perform an explicit type conversion.

// Example of an ODI Expression for explicit date conversion:
// If source column is VARCHAR2 and target is DATE:
// TO_DATE(${source_column_name}, 'YYYY-MM-DD')
// Always refer to ODI documentation for specific syntax and best practices.

Oracle ORA-30175: Invalid Argument Type