maxKey

This function is used by Ignition's Expression language.

Description

Returns org.bson.types.MaxKey, which is used in filters for the MongoDB Perspective binding expression.

Syntax

maxKey()

• Parameters

  • None

• Results

  • MaxKey - A special data type that will match with document fields of the same MaxKey type.

Example

Code Snippet

// In this example, we are querying for weather data documents using the field “elevation”
// In a Perspective MongoDB Binding, the expression below is applied to “value” of
// filter { elevation: “value” }
 
maxKey() // binding will return entire document(s) where maxKey is found