NullProcessing Element (ASSL)
Defines how null values are processed.
語法
<DataItem>
...
<NullProcessing>...</NullProcessing>
...
</DataItem>
Element Characteristics
| Characteristic | Description |
|---|---|
Data type and length |
String (enumeration) |
Default value |
Automatic |
Cardinality |
0-1: Optional element that can occur once and only once. |
Element Relationships
| Relationship | Element |
|---|---|
Parent element |
|
Child elements |
None |
備註
The value of this element is limited to one of the strings listed in the following table.
Value
Description
Preserve
Preserves the null value.
Error
Raises a null key error. The value of NullKeyNotAllowed determines how the instance reacts to the error.
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附註：
This value is not supported for measures.
UnknownMember
Generates an unknown member and raises a null conversion error. The value of NullKeyConvertedToUnknown determines how the instance reacts to the error.
附註：
This value is not supported for columns associated with measures.
ZeroOrBlank
Converts the null value to zero (for numeric data items) or a blank string (for string data items).
附註：
This value provides compatibility with previous versions of Microsoft SQL Server Analysis Services.
Automatic
Uses the default processing appropriate for the element:
- ZeroOrBlank for OLAP data items.
- UnknownMember for data mining data items.
The enumeration that corresponds to the allowed values for NullProcessing in the Analysis Management Objects (AMO) object model is NullProcessing.