Is null

Supported in: Batch, Streaming

Returns true if the input is null, can optionally treat empty strings as null.

Expression categories: Boolean

Declared arguments

• Expression - no description
  Expression<AnyType>
• optional Treat empty strings as null - no description
  Literal<Boolean>

Output type: Boolean

Examples

Example 1: Base case

Argument values:

• Expression: empty string
• Treat empty strings as null: true

Output: true

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Example 2: Base case

Argument values:

• Expression: hello
• Treat empty strings as null: null

Output: false

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Example 3: Base case

Argument values:

• Expression: 1
• Treat empty strings as null: null

Output: false

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Example 4: Base case

Argument values:

• Expression: null
• Treat empty strings as null: null

Output: true

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