MySQL PV Progress - SQL

Introduction

MySQL PV Progress is a feature that helps to monitor the progress of long running queries. It provides information on the current progress of a query, the estimated total progress, and the time remaining until completion. This feature can be useful for monitoring and optimizing query performance.

Code

To use MySQL PV Progress, add the keyword PROGRESS to your SQL statement. For example:

SELECT * FROM my_table WHERE foo = 'bar' PROGRESS;

This will return the progress information for the query.

Progress Information

The progress information returned by MySQL PV Progress includes the following:

• State: The current state of the query (e.g. Sending data, Sorting result, Copying to tmp table)
• Total Cost: The estimated total cost of the query
• Completed Cost: The estimated completed cost of the query
• Progress: The percentage of completion of the query
• Time Remaining: The estimated time remaining until completion

Example Output

The following is an example of the output returned by MySQL PV Progress:

+------------------------------------------------+
| State         | Total Cost | Completed Cost | Progress | Time Remaining |
+------------------------------------------------+
| Sending data  | 100        | 75             | 75%      | 00:05:00       |
+------------------------------------------------+

Conclusion

MySQL PV Progress can be an extremely useful tool for monitoring and optimizing query performance. By adding the PROGRESS keyword to your SQL statements, you can easily monitor the progress of long running queries and identify any potential bottlenecks.