Function SPI_GetMemoryReservation

src/backend/executor/spi.c:3516–3520

* What was the amount of memory reserved for the last operator? See SPI_ReserveMemory() * for details. */

 * for details.
 */
uint64 SPI_GetMemoryReservation(void)
{
	Assert(!IsResManagerMemoryPolicyNone());
	return SPIMemReserved;
}

/**
 * Is memory reserved stack empty?