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[Rust][Datafusion] Implement nullif() function for DataFusion #26319

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Description

@asfimport

Here is the common definition of NULLIF() function:

https://www.w3schools.com/sql/func_sqlserver_nullif.asp

 

Among other uses, it is used to protect denominators from divide by 0 errors.

We have implemented it at UrbanLogiq and would like to contribute this back.

Reporter: Evan Chan / @velvia
Assignee: Evan Chan / @velvia

PRs and other links:

Note: This issue was originally created as ARROW-10330. Please see the migration documentation for further details.

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