[ https://issues.apache.org/jira/browse/HIVE-3958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gang Tim Liu updated HIVE-3958: ------------------------------- Status: Patch Available (was: In Progress) > support partial scan for analyze command - RCFile > ------------------------------------------------- > > Key: HIVE-3958 > URL: https://issues.apache.org/jira/browse/HIVE-3958 > Project: Hive > Issue Type: Improvement > Reporter: Gang Tim Liu > Assignee: Gang Tim Liu > Attachments: HIVE-3958.patch.1 > > > analyze commands allows us to collect statistics on existing > tables/partitions. It works great but might be slow since it scans all files. > There are 2 ways to speed it up: > 1. collect stats without file scan. It may not collect all stats but good and > fast enough for use case. HIVE-3917 addresses it > 2. collect stats via partial file scan. It doesn't scan all content of files > but part of it to get file metadata. some examples are > https://cwiki.apache.org/Hive/rcfilecat.html for RCFile, ORC ( HIVE-3874 ) > and HFile of Hbase > This jira is targeted to address the #2. More specifically RCFile format. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira