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Destroys an expression field.
DestroyExpression(string field_spec)
| Argument | Contents |
|---|---|
| field_spec | The expression field to be destroyed. |
If the input field is an expression field on a joined view, and the joined view inherits this field from one of its component views, then the expression fields on both the joined view and the component view are destroyed.
DestroyExpression("States.[Population Density]")
| Error Type | Meaning |
|---|---|
| Error | The input field is not an expression field; or the input expression field is used as a link field in a joined view or is otherwise in use |
| NotFound | The specified field does not exist |
| Function | Summary |
|---|---|
| CreateExpression() | Creates an expression field on a view |
| VerifyExpression() | Verifies the validity of an expression |
| GetExpressions() | Returns an array of all expression fields defined in a view |
| GetExpressionInfo() | Returns information about an expression (formula) field |
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