Sampling Rules¶
Sampling Rules are defined using Google Common Expression Language (CEL). The language syntax is defined here. And you can find a list of definitions (operators, functions, and constants) here (some functions and complex operators may not be supported).
The Data Sample contents are available under the sample key scope. This page provides some examples to get you started:
| CEL expression | Description |
|---|---|
true |
Matches all Data Samples. Useful when you don't know how the data looks like or if you just want to export everything |
sample.id != "" |
True if the field id is defined |
sample.id == "some_id" && sample.val == 1 |
You can use boolean expression like && or || to concatenate expressions |
sample.val1 > 0 |
Numeric values can be compared |
sample.val1 * sample.val2 > 10 |
Arithmetic operations are supported |
(sample.val1 || sample.val2) && sample.val3 |
Use parenthesis to specify operator precedence |