[jira] (SPARK-19408) cardinality estimation involving two columns of the same table

[Ron Hu (JIRA)]

Title: Message Title

Ron Hu created an issue   Spark / SPARK-19408 cardinality estimation involving two columns of the same table Issue Type: Sub-task Affects Versions: 2.1.0 Assignee: Unassigned Components: Optimizer Created: 31/Jan/17 01:44 Priority: Major 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. Add Comment   This message was sent by Atlassian JIRA (v6.3.15#6346-sha1:dbc023d)