database: MDL-18269 query logging behaviour changed in Moodle 1.9 due to internal ADODB changes.

config-dist.php

@@ -259,6 +259,9 @@ $CFG->admin = 'admin';
 // The following setting will log every database query to a table called adodb_logsql.
 // Use this setting on a development server only, the table grows quickly!
 //     $CFG->logsql = true;
+// By default, only queries that take longer than 0.05 seconds are logged. To change that,
+// set the following variable. For example, to lot all queries:
+//     $CFG->logsqlmintime = 0.0;
 //
 // The following setting will turn on username logging into Apache log. For full details regarding setting
 // up of this function please refer to the install section of the document.

lib/setup.php

@@ -241,6 +241,11 @@ global $HTTPSPAGEREQUIRED;
 /// Turn on SQL logging if required
     if (!empty($CFG->logsql)) {
         $db->LogSQL();
+        // And override ADODB's default logging time
+        if (isset($CFG->logsqlmintime)) {
+            global $ADODB_PERF_MIN;
+            $ADODB_PERF_MIN = $CFG->logsqlmintime;
+        }
     }
 
 /// Prevent warnings from roles when upgrading with debug on