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349f426197
I have broken up the single query that was doing multiple joins on the messaging and user tables. It no longer does any joins and will instead query each data set individually. This may cost more in terms of PHP processing but it will mean that standard database tunings should be able to handle larger data sets. For example this function was taking a long time to run on moodle.org and was causing the MySQL join buffer to overflow.
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Moodle - the world's open source learning platform
Moodle <https://moodle.org> is a learning platform designed to provide
educators, administrators and learners with a single robust, secure and
integrated system to create personalised learning environments.
You can download Moodle <https://download.moodle.org> and run it on your own
web server, ask one of our Moodle Partners <https://moodle.com/partners/> to
assist you, or have a MoodleCloud site <https://moodle.com/cloud/> set up for
you.
Moodle is widely used around the world by universities, schools, companies and
all manner of organisations and individuals.
Moodle is provided freely as open source software, under the GNU General Public
License <https://docs.moodle.org/dev/License>.
Moodle is written in PHP and JavaScript and uses an SQL database for storing
the data.
See <https://docs.moodle.org> for details of Moodle's many features.