Filter node

A filter node controls the data that moves through a flow.

• Field: The field that provides the input to the filter node. You can specify fields from any nodes positioned before the current node in the flow.

  Tip

  Select the plus icon (+) to search for the fields you want to add. For parameter types and how to reference values, see Parameter types.

• Filter criteria: The criteria applied by the filter node to determine which data should be included or excluded in the output. Conditions in the same group are combined with AND. Add another group (OR statement) to combine groups with OR. Use the link icon to group conditions as a single unit or separate them.

• Test: Allows you to test the node.

In the example below, the filter node takes the output of the second node in the flow (2. DescribeInstances) as its data source, applies the filter criteria Reservations.Groups.GroupName == "my-group", and outputs a list of instance Ids (Referenced field: Reservations.Instances.InstanceId) that meet the criteria.

Filter operators

The filter criteria use comparison operators to match field values. The available operators depend on the type of the selected field (for example, string, number, timestamp, boolean, list, or map).

Operator	Description
==	Equal to
!=	Not equal to
>	Greater than
<	Less than
>=	Greater than or equal to
<=	Less than or equal to
in	Value is in the given list
not in	Value is not in the given list
is null	Field is null or missing
is not null	Field is present and not null
contains	List or string contains the value
not contains	List or string does not contain the value
length	Length equals the given number
length >	Length greater than the given number
length <	Length less than the given number
has key	Map or object has the given key
has value	Map or object has a value for the given key
starts with	String starts with the given value
ends with	String ends with the given value
matches regex	String matches the given regular expression

For starts with, ends with, and matches regex you can enable case-insensitive matching to ignore capital letters. For matches regex, use the standard RE2 pattern syntax. See re2 documentation for details.