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Allow For Expressing Nullability of "Returns null only if all arguments evaluate to null" #601

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vbarua opened this issue Feb 9, 2024 · 0 comments
Open

Allow For Expressing Nullability of "Returns null only if all arguments evaluate to null" #601

vbarua opened this issue Feb 9, 2024 · 0 comments

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@vbarua
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vbarua commented Feb 9, 2024

The nullability of functions like coalesce, least_skip_null and greatest_skip_null can be expressed in words as:

The function returns null only if all arguments evaluate to null.

or equivalently

The function returns non-null if any of the inputs are non-null.

There is currently no mechanism for explaining this nullability.
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