Wenchen Fan created SPARK-31404: ----------------------------------- Summary: backward compatibility after switching to Proleptic Gregorian calendar Key: SPARK-31404 URL: https://issues.apache.org/jira/browse/SPARK-31404 Project: Spark Issue Type: Bug Components: SQL Affects Versions: 3.0.0 Reporter: Wenchen Fan
In Spark 3.0, we switch to the Proleptic Gregorian calendar by using the Java 8 datetime APIs. This makes Spark follow the ISO and SQL standard, but introduces some backward compatibility problems: 1. may read wrong data from the data files written by Spark 2.4 2. may have perf regression -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org