Evaluates an arbitrary expression as a boolean value and filters events when the expression returns true.

ParameterTypeRequiredDefaultDescription
expression[a]expressionrequired  The expression to test.

[a] The argument name expression can be omitted.

Omitted Argument Names

The argument name for expression can be omitted; the following forms of this function are equivalent:

logscale
test("value")

and:

logscale
test(expression="value")

These examples show basic structure only; full examples are provided below.

test() Examples

The following tests if the value of the field foo is less than the value of the field bar:

logscale
test(foo < bar)

This example compares a field value within the LogScale repository:

logscale
test(cputime < 7500)