sql - Trying to get a column value of an ancestor when using HIERARCHYID -


i'm evaluating hierarchyid data type see if it'll meet needs project. hoping use manager of given employee id. i'm looking @ tables in adventureworks db (the 2012 version), person.person , humanresources.employee tables.

my query goes this:

select      pp.lastname + ', ' + pp.firstname name,     cast(hre.nationalidnumber bigint) id,     hre.loginid,     hre.organizationnode.getancestor(1) managerid,     hre.jobtitle,     hre.birthdate,     hre.maritalstatus,     hre.gender,     hre.hiredate      person.person pp inner join      humanresources.employee hre on pp.businessentityid = hre.businessentityid

now expected because getancestor() clr function i'd have been able hre.organizationnode.getancestor(1).nationalidnumber managerid told i'm not worthy fast.

what i'm doing wrong here?

edit later on

playing around leads me hardly optimal (or it?)

select     pp.lastname + ', ' + pp.firstname name,     cast(hre.nationalidnumber bigint) id,     hre.loginid,     null managerid,     hre.jobtitle,     hre.birthdate,     hre.maritalstatus,     hre.gender,     hre.hiredate,     hre.organizationlevel      person.person pp inner join      humanresources.employee hre on pp.businessentityid = hre.businessentityid      organizationlevel = 0 union select     pp.lastname + ', ' + pp.firstname name,     cast(hre.nationalidnumber bigint) id,     hre.loginid,     cast(hre2.nationalidnumber bigint) managerid,     hre.jobtitle,     hre.birthdate,     hre.maritalstatus,     hre.gender,     hre.hiredate,     hre.organizationlevel      person.person pp inner join      humanresources.employee hre on pp.businessentityid = hre.businessentityid inner join      humanresources.employee hre2 on hre.organizationnode.getancestor(1) = hre2.organizationnode order     hre.organizationlevel asc

a correlated sub-query seems me:

select      pp.lastname + ', ' + pp.firstname name,     cast(hre.nationalidnumber bigint) id,     hre.loginid,     (         select nationalidnumber         humanresources.employee m         organizationnode = hre.organizationnode.getancestor(1)     )as managerid,     hre.jobtitle,     hre.birthdate,     hre.maritalstatus,     hre.gender,     hre.hiredate      person.person pp inner join      humanresources.employee hre on pp.businessentityid = hre.businessentityid

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