POC_fix_compression_in_rowtype.patch

diff --git a/src/backend/access/heap/heaptoast.c b/src/backend/access/heap/heaptoast.c
index 55bbe1d..0aeea55 100644
--- a/src/backend/access/heap/heaptoast.c
+++ b/src/backend/access/heap/heaptoast.c
@@ -587,11 +587,28 @@ toast_build_flattened_tuple(TupleDesc tupleDesc,
 		if (!isnull[i] && TupleDescAttr(tupleDesc, i)->attlen == -1)
 		{
 			struct varlena *new_value;
+			bool			changed = false;
 
 			new_value = (struct varlena *) DatumGetPointer(new_values[i]);
+
 			if (VARATT_IS_EXTERNAL(new_value))
 			{
 				new_value = detoast_external_attr(new_value);
+				changed = true;
+			}
+
+			if (VARATT_IS_COMPRESSED(new_value) &&
+				VARFLAGS_4B_C(new_value) != PGLZ_COMPRESSION_ID)
+			{
+				struct varlena *tmp = new_value;
+
+				new_value = detoast_attr(tmp);
+				if (changed)
+					pfree(tmp);
+				changed = true;
+			}
+			if (changed)
+			{
 				new_values[i] = PointerGetDatum(new_value);
 				freeable_values[num_to_free++] = (Pointer) new_value;
 			}
diff --git a/src/backend/executor/execTuples.c b/src/backend/executor/execTuples.c
index 73c35df..f115464 100644
--- a/src/backend/executor/execTuples.c
+++ b/src/backend/executor/execTuples.c
@@ -2207,10 +2207,6 @@ HeapTupleHeaderGetDatum(HeapTupleHeader tuple)
 	Datum		result;
 	TupleDesc	tupDesc;
 
-	/* No work if there are no external TOAST pointers in the tuple */
-	if (!HeapTupleHeaderHasExternal(tuple))
-		return PointerGetDatum(tuple);
-
 	/* Use the type data saved by heap_form_tuple to look up the rowtype */
 	tupDesc = lookup_rowtype_tupdesc(HeapTupleHeaderGetTypeId(tuple),
 									 HeapTupleHeaderGetTypMod(tuple));