Function ExecAsyncResponse

src/backend/executor/execAsync.c:116–129

* Call the requestor back when an asynchronous node has produced a result. */

 * Call the requestor back when an asynchronous node has produced a result.
 */
void
ExecAsyncResponse(AsyncRequest *areq)
{
	switch (nodeTag(areq->requestor))
	{
		case T_AppendState:
			ExecAsyncAppendResponse(areq);
			break;
		default:
			/* If the node doesn't support async, caller messed up. */
			elog(ERROR, "unrecognized node type: %d",
				 (int) nodeTag(areq->requestor));
	}
}

/*
 * A requestee node should call this function to deliver the tuple to its