On Wed, Jun 2, 2021 2:44 PM Dilip Kumar <dilipbal...@gmail.com> wrote: 
> Attached patch fixes that, I haven't yet added the test case.  Once
> someone confirms on the approach then I will add a test case to the
> patch.

        key_tuple = heap_form_tuple(desc, values, nulls);
        *copy = true;
...
                key_tuple = toast_flatten_tuple(oldtup, desc);
                heap_freetuple(oldtup);
        }
+       /*
+        * If key tuple doesn't have any external data and key is not changed 
then
+        * just free the key tuple and return NULL.
+        */
+       else if (!key_changed)
+       {
+               heap_freetuple(key_tuple);
+               return NULL;
+       }
 
        return key_tuple;
 }

I think "*copy = false" should be added before return NULL because we don't 
return a modified copy tuple here. Thoughts?

Regards
Tang 

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