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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2020/12/03 06:21:53 UTC
[GitHub] [spark] AngersZhuuuu edited a comment on pull request #30350: [SPARK-33428][SQL] Conv UDF use BigInt to avoid Long value overflow
AngersZhuuuu edited a comment on pull request #30350:
URL: https://github.com/apache/spark/pull/30350#issuecomment-737690572
> Fixing overflow should be good. It's not very intuitive to read the results of this function. Is there any database we can use as a reference?
Mysql: https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_conv
But still only support 64-bit presicion.
Hive: https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF
Latest version support BigInt now but internal logic still use `long`..
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