Function SPI_freeplan

src/backend/executor/spi.c:1052–1072

}

int
SPI_freeplan(SPIPlanPtr plan)
{
	ListCell   *lc;

	if (plan == NULL || plan->magic != _SPI_PLAN_MAGIC)
		return SPI_ERROR_ARGUMENT;

	/* Release the plancache entries */
	foreach(lc, plan->plancache_list)
	{
		CachedPlanSource *plansource = (CachedPlanSource *) lfirst(lc);

		DropCachedPlan(plansource);
	}

	/* Now get rid of the _SPI_plan and subsidiary data in its plancxt */
	MemoryContextDelete(plan->plancxt);

	return 0;
}

HeapTuple
SPI_copytuple(HeapTuple tuple)