Function equalRSDesc

src/backend/utils/cache/relcache.c:1003–1030

* equalRSDesc * * Determine whether two RowSecurityDesc's are equivalent */

 *		Determine whether two RowSecurityDesc's are equivalent
 */
static bool
equalRSDesc(RowSecurityDesc *rsdesc1, RowSecurityDesc *rsdesc2)
{
	ListCell   *lc,
			   *rc;

	if (rsdesc1 == NULL && rsdesc2 == NULL)
		return true;

	if ((rsdesc1 != NULL && rsdesc2 == NULL) ||
		(rsdesc1 == NULL && rsdesc2 != NULL))
		return false;

	if (list_length(rsdesc1->policies) != list_length(rsdesc2->policies))
		return false;

	/* RelationBuildRowSecurity should build policies in order */
	forboth(lc, rsdesc1->policies, rc, rsdesc2->policies)
	{
		RowSecurityPolicy *l = (RowSecurityPolicy *) lfirst(lc);
		RowSecurityPolicy *r = (RowSecurityPolicy *) lfirst(rc);

		if (!equalPolicy(l, r))
			return false;
	}

	return true;
}

/*
 *		RelationBuildDesc