Github user viirya commented on the issue:
https://github.com/apache/spark/pull/16476
@gczsjdy I am not sure where you find the definition of Hive's `field`
function. But in this link:
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-StringFunctions
Looks like it behaves very similar to MySQL. It doesn't claim that the
arguments of different types won't be compared.
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