[ https://issues.apache.org/jira/browse/SPARK-19408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ron Hu updated SPARK-19408: --------------------------- Target Version/s: 2.3.0 (was: 2.2.0) > cardinality estimation involving two columns of the same table > -------------------------------------------------------------- > > Key: SPARK-19408 > URL: https://issues.apache.org/jira/browse/SPARK-19408 > Project: Spark > Issue Type: Sub-task > Components: Optimizer > Affects Versions: 2.1.0 > Reporter: Ron Hu > > In SPARK-17075, we estimate cardinality of predicate expression "column (op) > literal", where op is =, <, <=, >, or >=. In SQL queries, we also see > predicate expressions involving two columns such as "column-1 (op) column-2" > where column-1 and column-2 belong to same table. Note that, if column-1 and > column-2 belong to different tables, then it is a join operator's work, NOT a > filter operator's work. > In this jira, we want to estimate the filter factor of predicate expressions > involving two columns of same table. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org