[OASIS Issue Tracker] Created: (ODATA-166) Inconsistent lifted operators for $filter

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

Inconsistent lifted operators for $filter
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                 Key: ODATA-166
                 URL: http://tools.oasis-open.org/issues/browse/ODATA-166
             Project: OASIS Open Data Protocol (OData) TC
          Issue Type: Bug
          Components: OData Protocol v1.0
            Reporter: Matthew Borges
            Priority: Minor


I didn't see any mention of lifted operators in the working drafts.  We should define how each operator behaves when one (or both) operands is null.

With that said, the V3 spec (section 2.2.3.6.1.1.5) is inconsistent with it's treatment of null:

- For equality operators, null eq null is true and null eq <anything not null> is false (i.e. the result is true or false)
- Any relational operators when compared with null are false (i.e. the result is true or false)
   - This implies that null ge null and null le null is false which is inconsistent with null eq null is true
- Logical operators treat null as false (i.e. the result is true or false)
- Unary operators are null if the operand is null (i.e. in the case of not, the result is true, false, or null)

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