Tried another getSQL() strategy for column naming

h2/src/main/org/h2/util/ColumnNamer.java

@@ -40,6 +40,9 @@ public class ColumnNamer {
         String columnName = null;
         if (columnNameOverride != null){
             columnName = columnNameOverride;
+            if(!isAllowableColumnName(columnName)){
+                columnName = null;
+            }            
         }  
         // try a name form the column alias
         if (columnName==null && columnExp.getAlias()!=null){
@@ -61,6 +64,16 @@ public class ColumnNamer {
                  columnName = null;
              }
         }
+        // try a name derived form the column expression plan SQL
+        if (columnName==null && columnExp.getSQL()!=null){
+             columnName =  columnExp.getSQL();
+             if(!isAllowableColumnName(columnName)){
+                 columnName = columnName.replace('\n', ' ').replace('\r', ' ');
+             }
+             if(!isAllowableColumnName(columnName)){
+                 columnName = null;
+             }
+        }
         // go with a innocuous default name pattern
         if (columnName==null){
             columnName =  "_unnamed_column_"+(indexOfColumn+1)+"_";