Function ExecFetchSlotHeapTuple

src/backend/executor/execTuples.c:1660–1685

* ExecFetchSlotHeapTuple - fetch HeapTuple representing the slot's content * * The returned HeapTuple represents the slot's content as closely as * possible. * * If materialize is true, the contents of the slots will be made independent * from the underlying storage (i.e. all buffer pins are released, memory is * allocated in the slot's context). * * If shouldFree is not-NULL it'll be set

 * behaviour, all such modifications are in the process of being removed.
 */
HeapTuple
ExecFetchSlotHeapTuple(TupleTableSlot *slot, bool materialize, bool *shouldFree)
{
	/*
	 * sanity checks
	 */
	Assert(slot != NULL);
	Assert(!TTS_EMPTY(slot));

	/* Materialize the tuple so that the slot "owns" it, if requested. */
	if (materialize)
		slot->tts_ops->materialize(slot);

	if (slot->tts_ops->get_heap_tuple == NULL)
	{
		if (shouldFree)
			*shouldFree = true;
		return slot->tts_ops->copy_heap_tuple(slot);
	}
	else
	{
		if (shouldFree)
			*shouldFree = false;
		return slot->tts_ops->get_heap_tuple(slot);
	}
}

/* --------------------------------
 *		ExecFetchSlotMinimalTuple