Data editor: show "read-only" status

plugins/org.jkiss.dbeaver.ui.editors.data/src/org/jkiss/dbeaver/ui/controls/resultset/ResultSetViewer.java

@@ -1828,7 +1828,7 @@ public class ResultSetViewer extends Viewer
         }
         setStatus(statusMessage, hasWarnings ? DBPMessageType.WARNING : DBPMessageType.INFORMATION);
 
-        if (rowCountLabel != null) {
+        if (rowCountLabel != null && !rowCountLabel.isDisposed()) {
             // Update row count label
             if (!hasData()) {
                 rowCountLabel.setMessage("No Data");

plugins/org.jkiss.dbeaver.ui.editors.data/src/org/jkiss/dbeaver/ui/controls/resultset/spreadsheet/SpreadsheetPresentation.java

@@ -900,8 +900,8 @@ public class SpreadsheetPresentation extends AbstractPresentation implements IRe
 
         Composite placeholder = null;
         if (inline) {
-            if (controller.isReadOnly()) {
-                return null;
+            if (controller.isAttributeReadOnly(attr)) {
+                controller.setStatus("Column " + DBUtils.getObjectFullName(attr, DBPEvaluationContext.UI) + " is read-only", DBPMessageType.ERROR);
             }
             spreadsheet.cancelInlineEditor();
             activeInlineEditor = null;
@@ -917,6 +917,8 @@ public class SpreadsheetPresentation extends AbstractPresentation implements IRe
             gd.grabExcessVerticalSpace = true;
             placeholder.setLayoutData(gd);
 
+            placeholder.addDisposeListener(e -> controller.updateStatusMessage());
+
             controller.lockActionsByControl(placeholder);
         }