I had a need for a Filter, but did not want to recreate the wheel by creating another Data Lookup Table, so instead I created a Linked Table that points to a MS SQL Table outside of IRIS.
Once I had the Linked Table, I created a Class Method Function that would query the Linked Table and return a 1 if a result came back.
ClassMethod CheckPDMProviderType(pInput As %String) As %Boolean
{
set ExtDisplay = ""
&sql(SELECT SecurityGroup_k INTO :ExtDisplay
FROM osuwmc_CPD_SQL.
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