Function ExecForceStoreHeapTuple

src/backend/executor/execTuples.c:1485–1522

* Store a HeapTuple into any kind of slot, performing conversion if * necessary. */

 * necessary.
 */
void
ExecForceStoreHeapTuple(HeapTuple tuple,
						TupleTableSlot *slot,
						bool shouldFree)
{
	if (TTS_IS_HEAPTUPLE(slot))
	{
		ExecStoreHeapTuple(tuple, slot, shouldFree);
	}
	else if (TTS_IS_BUFFERTUPLE(slot))
	{
		MemoryContext oldContext;
		BufferHeapTupleTableSlot *bslot = (BufferHeapTupleTableSlot *) slot;

		ExecClearTuple(slot);
		slot->tts_flags &= ~TTS_FLAG_EMPTY;
		oldContext = MemoryContextSwitchTo(slot->tts_mcxt);
		bslot->base.tuple = heap_copytuple(tuple);
		slot->tts_flags |= TTS_FLAG_SHOULDFREE;
		MemoryContextSwitchTo(oldContext);

		if (shouldFree)
			pfree(tuple);
	}
	else
	{
		ExecClearTuple(slot);
		heap_deform_tuple(tuple, slot->tts_tupleDescriptor,
						  slot->tts_values, slot->tts_isnull);
		ExecStoreVirtualTuple(slot);

		if (shouldFree)
		{
			ExecMaterializeSlot(slot);
			pfree(tuple);
		}
	}
}

/*
 * Store a MinimalTuple into any kind of slot, performing conversion if