Function classify_matching_subplans

src/backend/executor/nodeAppend.c:1192–1225

---------------------------------------------------------------- * classify_matching_subplans * * Classify the node's as_valid_subplans into sync ones and * async ones, adjust it to contain sync ones only, and save * async ones in the node's as_valid_asyncplans. * ---------------------------------------------------------------- */

 * ----------------------------------------------------------------
 */
static void
classify_matching_subplans(AppendState *node)
{
	Bitmapset  *valid_asyncplans;

	Assert(node->as_valid_asyncplans == NULL);

	/* Nothing to do if there are no valid subplans. */
	if (bms_is_empty(node->as_valid_subplans))
	{
		node->as_syncdone = true;
		node->as_nasyncremain = 0;
		return;
	}

	/* Nothing to do if there are no valid async subplans. */
	if (!bms_overlap(node->as_valid_subplans, node->as_asyncplans))
	{
		node->as_nasyncremain = 0;
		return;
	}

	/* Get valid async subplans. */
	valid_asyncplans = bms_copy(node->as_asyncplans);
	valid_asyncplans = bms_int_members(valid_asyncplans,
									   node->as_valid_subplans);

	/* Adjust the valid subplans to contain sync subplans only. */
	node->as_valid_subplans = bms_del_members(node->as_valid_subplans,
											  valid_asyncplans);

	/* Save valid async subplans. */
	node->as_valid_asyncplans = valid_asyncplans;
}

void
ExecSquelchAppend(AppendState *node, bool force)