diff --git a/python/plugins/db_manager/db_plugins/gpkg/connector.py b/python/plugins/db_manager/db_plugins/gpkg/connector.py
index 9fe63b57bd9..7b352912e30 100644
--- a/python/plugins/db_manager/db_plugins/gpkg/connector.py
+++ b/python/plugins/db_manager/db_plugins/gpkg/connector.py
@@ -624,6 +624,12 @@ class GPKGDBConnector(DBConnector):
         """Comment the table"""
         return ''
 
+    def commentTable(self, schema, tablename, comment):
+        return ''
+
+    def unCommentTable(self, schema, tablename):
+        return ''
+
     def getComment(self, tab, field, db):
         """Returns the comment for a field"""
         return ''
diff --git a/python/plugins/db_manager/db_plugins/oracle/connector.py b/python/plugins/db_manager/db_plugins/oracle/connector.py
index 83ada3b70b4..33897d5abf0 100644
--- a/python/plugins/db_manager/db_plugins/oracle/connector.py
+++ b/python/plugins/db_manager/db_plugins/oracle/connector.py
@@ -1311,6 +1311,12 @@ class OracleDBConnector(DBConnector):
         """Comment the table"""
         return ''
 
+    def commentTable(self, schema, tablename, comment):
+        return ''
+
+    def unCommentTable(self, schema, tablename):
+        return ''
+
     def getComment(self, tab, field, db):
         """Returns the comment for a field"""
         return ''
diff --git a/python/plugins/db_manager/db_plugins/postgis/connector.py b/python/plugins/db_manager/db_plugins/postgis/connector.py
index f40f4d4855b..ec20239a43c 100644
--- a/python/plugins/db_manager/db_plugins/postgis/connector.py
+++ b/python/plugins/db_manager/db_plugins/postgis/connector.py
@@ -743,8 +743,11 @@ class PostGisDBConnector(DBConnector):
 
         self._commit()
 
-    def commentTable(self, schema, tablename, comment):
-        self.db.connector._execute(None, 'COMMENT ON TABLE "{0}"."{1}" IS E\'{2}\''.format(schema, tablename, comment))
+    def commentTable(self, schema, tablename, comment, db):
+        db.connector._execute(None, 'COMMENT ON TABLE "{0}"."{1}" IS E\'{2}\';'.format(schema, tablename, comment))
+
+    def unCommentTable(self, schema, tablename, db):
+        db.connector._execute(None, 'COMMENT ON TABLE "{0}"."{1}" IS NULL;'.format(schema, tablename))
 
     def getComment(self, tab, field, db):
         """Returns the comment for a field"""
@@ -754,7 +757,6 @@ class PostGisDBConnector(DBConnector):
         sql = "Select pd.description from pg_description pd, pg_class pc, pg_attribute pa where relname = '%s' and attname = '%s' and pa.attrelid = pc.oid and pd.objoid = pc.oid and pd.objsubid = pa.attnum" % (tab, field)
         c = db.connector._execute(None, sql_cpt) # Execute Check query
         res = db.connector._fetchone(c)[0] # Store result
-        print(tab, field, sql_cpt, sql)
         if res == 1:
             # When a comment exists
             c = db.connector._execute(None, sql) # Execute query
diff --git a/python/plugins/db_manager/db_plugins/spatialite/connector.py b/python/plugins/db_manager/db_plugins/spatialite/connector.py
index d6a148e5002..d444e0d8782 100644
--- a/python/plugins/db_manager/db_plugins/spatialite/connector.py
+++ b/python/plugins/db_manager/db_plugins/spatialite/connector.py
@@ -575,6 +575,12 @@ class SpatiaLiteDBConnector(DBConnector):
         """Comment the table"""
         return ''
 
+    def commentTable(self, schema, tablename, comment):
+        return ''
+
+    def unCommentTable(self, schema, tablename):
+        return ''
+
     def getComment(self, tab, field, db):
         """Returns the comment for a field"""
         return ''
diff --git a/python/plugins/db_manager/db_plugins/vlayers/connector.py b/python/plugins/db_manager/db_plugins/vlayers/connector.py
index 0d996a4bd23..d4cf8cce0ef 100644
--- a/python/plugins/db_manager/db_plugins/vlayers/connector.py
+++ b/python/plugins/db_manager/db_plugins/vlayers/connector.py
@@ -346,6 +346,12 @@ class VLayerConnector(DBConnector):
         """Comment the table"""
         return ''
 
+    def commentTable(self, schema, tablename, comment):
+        return ''
+
+    def unCommentTable(self, schema, tablename):
+        return ''
+
     def getComment(self, tab, field, db):
         """Returns the comment for a field"""
         return ''
diff --git a/python/plugins/db_manager/dlg_import_vector.py b/python/plugins/db_manager/dlg_import_vector.py
index 3ef50415c94..118eb77e74c 100644
--- a/python/plugins/db_manager/dlg_import_vector.py
+++ b/python/plugins/db_manager/dlg_import_vector.py
@@ -373,9 +373,10 @@ class DlgImportVector(QDialog, Ui_Dialog):
             self.db.connector.createSpatialIndex((schema, table), geom)
 
         # add comment on table
+        supportCom = self.db.supportsComment()
         if self.chkCom.isEnabled() and self.chkCom.isChecked() and supportCom == True:
             # using connector executing COMMENT ON TABLE query (with editCome.text() value)
-            self.db.connector.commentTable(db, schema, table, self.editCom.text())
+            self.db.connector.commentTable(schema, table, self.editCom.text(), self.db)
 
         self.db.connection().reconnect()
         self.db.refresh()
diff --git a/python/plugins/db_manager/dlg_table_properties.py b/python/plugins/db_manager/dlg_table_properties.py
index 397b9916bee..d04fdd50009 100644
--- a/python/plugins/db_manager/dlg_table_properties.py
+++ b/python/plugins/db_manager/dlg_table_properties.py
@@ -338,8 +338,10 @@ class DlgTableProperties(QDialog, Ui_Dialog):
     def createComment(self):
         """Adds a comment to the selected table"""
         try:
-            #Using the db connector, executing de SQL query Comment on table
-            self.db.connector._execute(None, 'COMMENT ON TABLE "{0}"."{1}" IS E\'{2}\';'.format(self.table.schema().name, self.table.name, self.viewComment.text()))
+            schem = self.table.schema().name
+            tab = self.table.name
+            com = self.viewComment.text()
+            self.db.connector.commentTable(schem, tab, com, self.db)
         except DbError as e:
             DlgDbError.showError(e, self)
             return
@@ -350,8 +352,9 @@ class DlgTableProperties(QDialog, Ui_Dialog):
     def deleteComment(self):
         """Drops the comment on the selected table"""
         try:
-            #Using the db connector, executing de SQL query Comment on table using the NULL definition
-            self.db.connector._execute(None, 'COMMENT ON TABLE "{0}"."{1}" IS NULL;'.format(self.table.schema().name, self.table.name))
+            schem = self.table.schema().name
+            tab = self.table.name
+            self.db.connector.unCommentTable(schem, tab, self.db)
         except DbError as e:
             DlgDbError.showError(e, self)
             return