#Splunk eval if statement how to#
This example shows you how to use the case function in two different ways, to create categories and to create a custom sort order. The results appear on the Statistics tab and look something like this:įor an example of how to display a default value when that status does not match one of the values specified, see the True function. Sourcetype=access_* | eval description=case(status=200, "OK", status=404, "Not found", status=500, "Internal Server Error") | table status description The following example returns descriptions for the corresponding http status code. Use the time range Yesterday when you run the search.
#Splunk eval if statement download#
To try this example on your own Splunk instance, you must download the sample data and follow the instructions to get the tutorial data into Splunk. You can use this function with the eval, fieldformat, and where commands, and as part of eval expressions.īasic example This example uses the sample data from the Search Tutorial, but should work with any format of Apache Web access log. The function defaults to NULL if none of the arguments are true. When the first expression is encountered that evaluates to TRUE, the corresponding argument is returned. The arguments are Boolean expressions that are evaluated from first to last. Returns the first value for which the condition evaluates to TRUE. (The above expression is literal, and uses JavaScript spread syntax.The following list contains the functions that you can use to compare values or specify conditional statements.įor information about using string and numeric fields in functions, and nesting functions, see Evaluation functions.įor information about Boolean operators, such as AND and OR, see Boolean operators.Īccepts alternating conditions and values. Value Expression: login='error' ? : myTags.Scenario D: Add value error to the multivalued field myTags: Scenario C: Create a multivalued field called myTags. Value Expression: login='fail' ? 'blocked' : action.Scenario B: Set field action to blocked if login=error: Scenario A: Create field myField with static value of value1: Note that Functions use the special variable _e to access the (context) event inside JavaScript expressions. !foo*, * means "All fields except for those that start with 'foo'.".!foobar, foo* means "All fields that start with 'foo' except foobar.".The list is order-sensitive when negated terms are used. Negated terms are supported in both Keep fields and Remove fields. For example, to keep only _time, _raw, source, sourcetype, host, we can specify them all in Keep, while specifying * in Remove. This is useful for implementing “remove all but” functionality. Using Keep and Remove Ī field matching an entry in both Keep (wildcard or not) and Remove will not be removed. For example, _myField cannot be removed by specifying _myF*. Instead, you must specify them individually. Cribl Stream internal fields that start with _ (double underscore) cannot be removed via wildcard. Cannot remove fields that match against the Keep fields list. Supports wildcards (*) and nested addressing. Remove fields: List of fields to remove from the event. For example, if _raw is converted to an object then use _raw* to refer to itself and all children. To reference a parent object and all children, you must use the (*) wildcard. Takes precedence over Remove fields (below). Keep fields: List of fields to keep in the event after processing by this Function. Useful for iterative development and debugging. Enabled: Toggle this off to disable evaluating individual expressions, while retaining their configuration in the table.(For details, see Cribl Expression Syntax.) When you insert JavaScript template literals, strings intended to be used as values must be delimited with single quotes, double quotes, or backticks. Expressions can contain nested addressing. Value Expression: Enter a JavaScript expression to set the field's value – this can be a constant.Name: Enter the new (or modified) field's name.Click Add Field to add each field as a key-value pair, in a row with the following controls: Defaults to No.Įvaluate fields: Table of event fields to evaluate and add/set. Defaults to empty.įinal: If toggled to Yes, stops feeding data to the downstream Functions. Defaults to true, meaning it evaluates all events.ĭescription: Simple description about this Function. (In Splunk, these are index-time fields.) Usage įilter: Filter expression (JS) that selects data to feed through the Function. The Eval Function adds or removes fields from events.
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