[ https://issues.apache.org/jira/browse/SPARK-34769?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Apache Spark reassigned SPARK-34769: ------------------------------------ Assignee: Apache Spark (was: Gengliang Wang) > AnsiTypeCoercion: return narrowest convertible type among TypeCollection > ------------------------------------------------------------------------ > > Key: SPARK-34769 > URL: https://issues.apache.org/jira/browse/SPARK-34769 > Project: Spark > Issue Type: Sub-task > Components: SQL > Affects Versions: 3.2.0 > Reporter: Gengliang Wang > Assignee: Apache Spark > Priority: Major > > Currently, when implicit casting a data type to a `TypeCollection`, Spark > returns the first convertible data type among `TypeCollection`. > In ANSI mode, we can make the behavior more reasonable by returning the > narrowest convertible data type in `TypeCollection`. > In details, we first try to find the all the expected types we can > implicitly cast: > 1. if there is no convertible data types, return None; > 2. if there is only one convertible data type, cast input as it; > 3. otherwise if there are multiple convertible data types, find the narrowest > common data > type among them. If there is no such narrowest common data type, return > None. > Note that if the narrowest common type is Float type and the convertible > types contains Double ype, simply return Double type as the narrowest common > type to avoid potential > precision loss on converting the Integral type as Float type. -- 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