Runtime Error

What This Error Means

This error occurs when you attempt to commit changes to a database within a transaction that has been marked as read-only. In a read-only transaction, you are not allowed to make any modifications to the database.

Why It Happens

This error typically happens when you have a transaction set to read-only and then attempt to execute a COMMIT statement. The COMMIT statement is used to save changes made within a transaction, but in a read-only transaction, there are no changes to save.

How to Fix It

1. 1To fix this error, you need to either alter the transaction to be read-write or discard the transaction and roll back the changes. You can do this by adding a SET TRANSACTION statement with the READ WRITE option before executing the COMMIT statement, or by using the ROLLBACK statement to discard the transaction and its changes.

Example Code Solution

START TRANSACTION READ ONLY;
INSERT INTO users (username, password) VALUES ('newuser', 'password123');
COMMIT;

START TRANSACTION READ WRITE;
INSERT INTO users (username, password) VALUES ('newuser', 'password123');
COMMIT;