Merge pull request #3321 from ControlSystemStudio/db_tabs

Databrowser export: Add tab to header

Author: kasemir

app/databrowser/src/main/java/org/csstudio/trends/databrowser3/export/ExportJob.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2010-2018 Oak Ridge National Laboratory.
+ * Copyright (c) 2010-2025 Oak Ridge National Laboratory.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -87,7 +87,7 @@ public void run()
         }
     }
 
-    /** @param comment Comment prefix ('#' for most ASCII, '%' for Matlab, ...)
+    /** @param comment Comment prefix ('#\t' for most ASCII, '%' for Matlab, ...)
      *  @param model Model with data
      *  @param start Start time
      *  @param end End time

app/databrowser/src/main/java/org/csstudio/trends/databrowser3/export/PlainExportJob.java

@@ -1,5 +1,5 @@
 /*******************************************************************************
- * Copyright (c) 2010-2018 Oak Ridge National Laboratory.
+ * Copyright (c) 2010-2025 Oak Ridge National Laboratory.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
@@ -45,8 +45,10 @@ public PlainExportJob(final Model model,
             final String filename,
             final Consumer<Exception> error_handler,
             final boolean unixTimeStamp)
-    {
-        super("# ", model, start, end, source, optimize_parameter, filename, error_handler, unixTimeStamp);
+    {   // MS Excel fails to recognize tab-separated data columns
+    	// unless the initial header rows also contain at least one tab per row,
+    	// so add that to comment
+        super("#\t", model, start, end, source, optimize_parameter, filename, error_handler, unixTimeStamp);
         this.formatter = formatter;
     }