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

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

When using the DAO in Yii to execute a SQL statement, you may encounter the following cryptic error:

CDbCommand failed to execute the SQL statement: SQLSTATE[HY093]: Invalid parameter number: parameter was not defined

This error occurs when the number of parameters specified in the SQL statement does not match the number of parameters bound to the command object.

Possible Causes

Here are some common causes of this error:

• Incorrect parameter name: The parameter name used in the SQL statement does not match the name of the parameter bound to the command.
• Missing parameter binding: A parameter is missing a corresponding bindValue() call, or a parameter is added that isn't referenced in the SQL statement.
• Invalid character in parameter name: Some characters are not allowed in parameter names, such as spaces or special characters.
• Conflict with pagination or sorting: Using complex queries with CDataProvider Pagination and/or Sorting can lead to issues with parameter binding getting dropped.

Troubleshooting Tips

To troubleshoot this error, try the following:

1. Enable parameter logging: Set 'enableParamLogging' to true in your database configuration to log the SQL statement and bound parameters.
2. Verify parameter names: Ensure that the parameter names in the SQL statement match the names of the parameters bound to the command.
3. Check for missing parameter bindings: Review your code to make sure all parameters are properly bound.
4. Avoid invalid characters: Use valid characters in your parameter names.
5. Consider disabling pagination or sorting: If you are using complex queries with pagination or sorting, try temporarily disabling these features to see if the error persists.

By following these steps, you can identify and resolve the cause of the "SQLSTATE[HY093]: Invalid parameter number" error in your SQL statements.

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