case()
Evaluates a list of predicates and returns the first result expression whose predicate is satisfied.
If none of the predicates return true, the result of the else expression is returned.
All predicate arguments must be expressions that evaluate to a boolean value.
All then arguments and the else argument must be of the same type.
Syntax
case(predicate_1, then_1,
[predicate_2, then_2, ...]
else)
Learn more about syntax conventions.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| predicate | string |
✔️ | An expression that evaluates to a boolean value. |
| then | string |
✔️ | An expression that gets evaluated and its value is returned from the function if predicate is the first predicate that evaluates to true. |
| else | string |
✔️ | An expression that gets evaluated and its value is returned from the function if neither of the predicate_i evaluate to true. |
Returns
The value of the first then_i whose predicate_i evaluates to true, or the value of else if neither of the predicates are satisfied.
Example
range Size from 1 to 15 step 2
| extend bucket = case(Size <= 3, "Small",
Size <= 10, "Medium",
"Large")
Output
| Size | bucket |
|---|---|
| 1 | Small |
| 3 | Small |
| 5 | Medium |
| 7 | Medium |
| 9 | Medium |
| 11 | Large |
| 13 | Large |
| 15 | Large |