diff --git a/lib/dml/mssql_native_moodle_database.php b/lib/dml/mssql_native_moodle_database.php
index fd1721abfb0..fd6d22856de 100644
--- a/lib/dml/mssql_native_moodle_database.php
+++ b/lib/dml/mssql_native_moodle_database.php
@@ -183,6 +183,9 @@ class mssql_native_moodle_database extends moodle_database {
             throw new dml_connection_exception($dberr);
         }
 
+        // Disable logging until we are fully setup.
+        $this->query_log_prevent();
+
         // already connected, select database and set some env. variables
         $this->query_start("--mssql_select_db", null, SQL_QUERY_AUX);
         $result = mssql_select_db($this->dbname, $this->mssql);
@@ -238,6 +241,9 @@ class mssql_native_moodle_database extends moodle_database {
         // Fetch/offset is supported staring from SQL Server 2012.
         $this->supportsoffsetfetch = $serverinfo['version'] > '11';
 
+        // We can enable logging now.
+        $this->query_log_allow();
+
         // Connection stabilised and configured, going to instantiate the temptables controller
         $this->temptables = new mssql_native_moodle_temptables($this);
 
diff --git a/lib/dml/mysqli_native_moodle_database.php b/lib/dml/mysqli_native_moodle_database.php
index 663bd6a6d88..40c25c465af 100644
--- a/lib/dml/mysqli_native_moodle_database.php
+++ b/lib/dml/mysqli_native_moodle_database.php
@@ -449,6 +449,9 @@ class mysqli_native_moodle_database extends moodle_database {
             throw new dml_connection_exception($dberr);
         }
 
+        // Disable logging until we are fully setup.
+        $this->query_log_prevent();
+
         $this->query_start("--set_charset()", null, SQL_QUERY_AUX);
         $this->mysqli->set_charset('utf8');
         $this->query_end(true);
@@ -466,6 +469,9 @@ class mysqli_native_moodle_database extends moodle_database {
             $this->query_end($result);
         }
 
+        // We can enable logging now.
+        $this->query_log_allow();
+
         // Connection stabilised and configured, going to instantiate the temptables controller
         $this->temptables = new mysqli_native_moodle_temptables($this);
 
diff --git a/lib/dml/oci_native_moodle_database.php b/lib/dml/oci_native_moodle_database.php
index 343663fc5b6..6f9161087f3 100644
--- a/lib/dml/oci_native_moodle_database.php
+++ b/lib/dml/oci_native_moodle_database.php
@@ -189,6 +189,9 @@ class oci_native_moodle_database extends moodle_database {
             throw new dml_connection_exception($dberr);
         }
 
+        // Disable logging until we are fully setup.
+        $this->query_log_prevent();
+
         // Make sure moodle package is installed - now required.
         if (!$this->oci_package_installed()) {
             try {
@@ -216,6 +219,9 @@ class oci_native_moodle_database extends moodle_database {
         //note: do not send "ALTER SESSION SET NLS_NUMERIC_CHARACTERS='.,'" !
         //      instead fix our PHP code to convert "," to "." properly!
 
+        // We can enable logging now.
+        $this->query_log_allow();
+
         // Connection stabilised and configured, going to instantiate the temptables controller
         $this->temptables = new oci_native_moodle_temptables($this, $this->unique_session_id);
 
diff --git a/lib/dml/pgsql_native_moodle_database.php b/lib/dml/pgsql_native_moodle_database.php
index efc5043eac6..5813133c038 100644
--- a/lib/dml/pgsql_native_moodle_database.php
+++ b/lib/dml/pgsql_native_moodle_database.php
@@ -170,6 +170,9 @@ class pgsql_native_moodle_database extends moodle_database {
             throw new dml_connection_exception($dberr);
         }
 
+        // Disable logging until we are fully setup.
+        $this->query_log_prevent();
+
         $this->query_start("--pg_set_client_encoding()", null, SQL_QUERY_AUX);
         pg_set_client_encoding($this->pgsql, 'utf8');
         $this->query_end(true);
@@ -198,6 +201,9 @@ class pgsql_native_moodle_database extends moodle_database {
             throw new dml_connection_exception('Can not read bytea type.');
         }
 
+        // We can enable logging now.
+        $this->query_log_allow();
+
         // Connection stabilised and configured, going to instantiate the temptables controller
         $this->temptables = new pgsql_native_moodle_temptables($this);
 
diff --git a/lib/dml/sqlsrv_native_moodle_database.php b/lib/dml/sqlsrv_native_moodle_database.php
index e2d253f1669..c9a71a2e9c5 100644
--- a/lib/dml/sqlsrv_native_moodle_database.php
+++ b/lib/dml/sqlsrv_native_moodle_database.php
@@ -204,6 +204,9 @@ class sqlsrv_native_moodle_database extends moodle_database {
             throw new dml_connection_exception($dberr);
         }
 
+        // Disable logging until we are fully setup.
+        $this->query_log_prevent();
+
         // Allow quoted identifiers
         $sql = "SET QUOTED_IDENTIFIER ON";
         $this->query_start($sql, null, SQL_QUERY_AUX);
@@ -250,6 +253,9 @@ class sqlsrv_native_moodle_database extends moodle_database {
         // Fetch/offset is supported staring from SQL Server 2012.
         $this->supportsoffsetfetch = $serverinfo['version'] > '11';
 
+        // We can enable logging now.
+        $this->query_log_allow();
+
         // Connection established and configured, going to instantiate the temptables controller
         $this->temptables = new sqlsrv_native_moodle_temptables($this);