[ https://issues.apache.org/jira/browse/HIVE-18055?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Work on HIVE-18055 started by wan kun. -------------------------------------- > cache like pattern object using map object in like function > ----------------------------------------------------------- > > Key: HIVE-18055 > URL: https://issues.apache.org/jira/browse/HIVE-18055 > Project: Hive > Issue Type: Improvement > Components: Query Processor > Reporter: wan kun > Assignee: wan kun > Priority: Minor > Fix For: 1.2.3 > > Original Estimate: 168h > Remaining Estimate: 168h > > Now, only one pattern object was cached in the like function. If the like > function is working on one column, the pattern object will be generated > continuously for the regular expression matching. It's very inefficient. So > should we use LRU MAP to cache a batch of objects ? -- This message was sent by Atlassian JIRA (v6.4.14#64029)