Extract map keys

Supported in: Batch, Streaming

Return map keys as an array. Note the order of array elements is not deterministic.

Expression categories: Map

Declared arguments

• Map - Map expression.
  Expression<Map<K, AnyType>>

Type variable bounds: K accepts AnyType

Output type: Array<K>

Examples

Example 1: Base case

Argument values:

• Map: flight_number

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Example 2: Null case

Argument values:

• Map: flight_number

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