void DBView_ItemDoubleClick(object sender, MetadataStructureItem clickedItem) { if (clickedItem.MetadataItem == null) { return; } // Adding a table to the currently active query. if ((MetadataType.Objects & clickedItem.MetadataItem.Type) == 0 && (MetadataType.ObjectMetadata & clickedItem.MetadataItem.Type) == 0) { return; } if (ActiveMdiChild == null) { ChildForm childWindow = CreateChildForm(); if (childWindow == null) { return; } childWindow.Show(); childWindow.Activate(); } ChildForm window = (ChildForm)ActiveMdiChild; if (window == null) { return; } MetadataItem metadataItem = clickedItem.MetadataItem; if (metadataItem == null) { return; } if ((metadataItem.Type & MetadataType.Objects) <= 0 && metadataItem.Type != MetadataType.Field) { return; } using (var qualifiedName = metadataItem.GetSQLQualifiedName(null, true)) { window.QueryView.AddObjectToActiveUnionSubQuery(qualifiedName.GetSQL()); } }