HyukjinKwon opened a new pull request #25108: [SPARK-28321][SQL] 0-args Java UDF should not be called only once URL: https://github.com/apache/spark/pull/25108 ## What changes were proposed in this pull request? 0-args Java UDF alone calls the function even before making it as an expression. It causes that the function always returns the same value. Seems like a mistake. ## How was this patch tested? Unit test was added
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