Can I use… first_value(…) ignore nulls

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  1. Non-standard alternative: first_value(<expr> ignore nulls)
  2. Non-standard alternative: first_value(<expr>, 'ignore nulls')

The first_value(…) window function with the ignore nulls clause evaluates its argument in the rows defined by the over clause in order and returns the first non-null value (if any).

  FROM …

Normative References

The first_value() ignore nulls is defined in ISO/IEC 9075:2016-2 as part of optional feature T617, “FIRST_VALUE and LAST_VALUE functions”.

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