How to Resolve the \'Unread Result Found\' Error in MySQL Connector for Python?

MySQL Connector for Python: Handling Unread Result Issue

One of the challenges commonly faced when using the MySQL connector for Python is the "unread result found" error. This error typically occurs when there are unprocessed results from a previous query that have not been consumed before executing a new query.

In the code snippet provided, the issue arises within a loop where the cursor is used to execute a series of queries. After each query, the cursor's fetchone() method is called to retrieve the first result. However, when the cursor is subsequently used to execute a new query, the "unread result found" error is raised.

This behavior stems from the unbuffered nature of the cursor by default. By setting the buffered parameter to True when creating the cursor, all results are retrieved immediately and cached. This prevents the issue of having unread results and allows the cursor to be reused without encountering the error.

The modified code using a buffered cursor:

cursor = cnx.cursor(buffered=True)

cursor.execute(query,(travel_mode, Orig_lat, Orig_lng, Dest_lat, Dest_lng, time_stamp))
leg_no = cursor.fetchone()[0]

# ... Rest of the code ...

The above is the detailed content of How to Resolve the \'Unread Result Found\' Error in MySQL Connector for Python?. For more information, please follow other related articles on the PHP Chinese website!