How can I use optional input parameters on a MetaMatrix Virtual Procedure? - Red Hat Customer Portal

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Issue

I have a virtual procedure with two parameters -- MemberIdentifier_In and SourceSystem_In. I query it using the following syntax:
```
select * from Canonical_Router.Member where sourcesystem_in='WGS'
```

When I execute the query, I receive the following error message:

No valid criteria specified for procedure parameter Canonical_Router.Member_MemberIdentifier_In

Environment

MetaMatrix Enterprise Server
MetaMatrix Virtual Procedure with MemberIdentifier_In parameter set to NULLABLE

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