SMS: Query Operator to Find Items Whose Value Is <NULL>

SUMMARY

You can query on <NULL> values when you use WBEM Query Language (WQL). The operators 'NULL' and 'NOT NULL' do work for queries. The problem occurs because the base class code has no concept of <NULL> values and all <NULL> values are returned as blank.

You can query on <NULL> and have the correct instance data returned, but you will not see <NULL> values in the instance.