Why Am I Getting the 'SQLSTATE[HY093]: Invalid parameter number' Error in Yii?

Troubleshooting "SQLSTATE[HY093]: Invalid parameter number" Error

In Yii, when encountering the cryptic "SQLSTATE[HY093]: Invalid parameter number" error, it typically indicates an issue with parameter binding in SQL statements.

Possible Causes

• Mismatched Parameter Names: Ensure that the parameter names specified in the SQL statement (:parameter) match the bindValue() parameters (:username). Here, the issue was that :alias was used in the SQL statement while binding to :username.
• Omitted bindValue() Calls: Confirm that all parameters used in the SQL statement have a corresponding bindValue() call.
• Invalid Placeholder Characters: Check for unusual characters within parameter placeholders, as certain characters may not be valid.
• Pagination or Sorting Conflicts: Complex queries involving joins and CDataProvider's pagination/sorting features can occasionally result in parameter omissions.

Troubleshooting Tips

Enable parameter logging in the config file by adding 'enableParamLogging'=>true, to trace the executed query and associated parameters. Additionally, consider the following debugging techniques:

• Inspect the error message to identify the specific parameter name(s) causing the issue.
• Review the code and ensure there are no typos or inconsistencies in parameter usage.
• Check the query generated by the command->createCommand($sql); to confirm if it matches the intended statement.
• Try binding parameters using positional values (e.g., ?, ?), which may be more robust in certain cases.

The above is the detailed content of Why Am I Getting the 'SQLSTATE[HY093]: Invalid parameter number' Error in Yii?. For more information, please follow other related articles on the PHP Chinese website!