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Improved indexing for improved performance on the course page, when viewing

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logs and when viewing lists of users ... thanks to Eloy for the one on the log file.
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moodler
2003-07-28 02:51:56 +00:00
parent 8b0ef9b0cb
commit a8fa25d18d
5 changed files with 26 additions and 5 deletions
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lib/db/postgres7.php
+7
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@@ -176,6 +176,13 @@ function main_upgrade($oldversion=0) {
table_column("course_sections", "sequence", "sequence", "text", "", "", "", "", "");
}
if ($oldversion < 2003072800) {
print_simple_box("The following database index improves performance, but can be quite large - if you are upgrading and you have problems with a limited quota you may want to delete this index later from the '{$CFG->prefix}log' table in your database", "center", "50%", "$THEME->cellheading", "20", "noticebox");
execute_sql(" CREATE INDEX {$CFG->prefix}log_timecoursemoduleaction_idx ON {$CFG->prefix}log (time,course,module,action) ");
execute_sql(" CREATE INDEX {$CFG->prefix}user_students_courseuserid_idx ON {$CFG->prefix}user_students (course,userid) ");
execute_sql(" CREATE INDEX {$CFG->prefix}user_teachers_courseuserid_idx ON {$CFG->prefix}user_teachers (course,userid) ");
}
return $result;
}
?>