[ https://issues.apache.org/jira/browse/HIVE-2121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Siying Dong updated HIVE-2121: ------------------------------ Attachment: HIVE-2121.4.patch remove the switch. I ran it against about 800 partitions input and didn't see obvious client time increase. > Input Sampling By Splits > ------------------------ > > Key: HIVE-2121 > URL: https://issues.apache.org/jira/browse/HIVE-2121 > Project: Hive > Issue Type: New Feature > Reporter: Siying Dong > Assignee: Siying Dong > Attachments: HIVE-2121.1.patch, HIVE-2121.2.patch, HIVE-2121.3.patch, > HIVE-2121.4.patch > > > We need a better input sampling to serve at least two purposes: > 1. test their queries against a smaller data set > 2. understand more about how the data look like without scanning the whole > table. > A simple function that gives a subset splits will help in those cases. It > doesn't have to be strict sampling. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira