2.12.9.1 ExistRestriction Structure
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RestrictType |
PropTag |
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RestrictType (1 byte): An unsigned integer. This value indicates the type of restriction (2) and MUST be set to 0x08.
PropTag (4 bytes): An unsigned integer. This value is the property tag of the column to be tested for existence in each row.
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The ExistRestriction structure is used to guarantee meaningful results for other types of restrictions (2) that involve properties, such as property and content restrictions. The result of a restriction (2) that involves a property that does not exist on a row is undefined. By creating an AndRestriction structure that joins the property restriction with an ExistRestriction structure, a client can be guaranteed accurate results.