Let us take a closer look at the MySQL buffered query. Our MySQL Support services at Bobcares can give you a complete guide on the query. And we will also go through the features of the query.

MySQL Buffered Queries

If we are only working with a MySQL database, we may wish to use the PDO driver buffered query mode. After the configuration of the connection for buffered query mode, the whole result is set for each SELECT query into memory before sending it to the application.

This has one advantage: we can check the number of rows in the return set using the PDOStatement::rowCount() function. When PDO uses buffered queries as a result of the instruction given, this approach produces reasonable results.

We must specify the PDO::MYSQL ATTR USE BUFFERED QUERY connection property to force PDO into MySQL buffered query mode.

When we run a SQL query from PHP, the MySQL server responds with a status message. This informs PHP (or, more precisely, the client library, such as mysqlnd) if the query yielded a result set or not.

If a result set exists, MySQL expects mysqlnd to request each row one by one. It will share the finding in the form of packets rather than as a whole. To signify the end of the result set, an EOF Packet will issue.

PHP may obtain and store all rows of the result set in RAM. This is a result of the MySQL query that buffered. Internally, the data is “buffered” in PHP memory for us to access via the mysqli or PDO interface.

PHP can be told not to save the results in memory at all, instead retrieving each and every row directly from the MySQL connection. This is a result set that has not been buffered. Note that only one row saves at a time in the PHP memory.

MySQL Buffered query Features

Below given are the features:

• We have complete freedom to move the cursor to whichever row we like.
• We are aware of the number of rows.
• PHP array holds all of the rows.
• The result set can iterate on several occasions without re-running the query.
• The connection can run another query while the previous one’s results are in the processing stage.

These are the main features of the Buffered query.

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Conclusion

To conclude the MySQL buffered query is the default setting. Queries have multiple features that are advantageous to the users. With the support of our MySQL support services, we have gone through all of the features of the buffered queries.