[jira] [Work started] (HIVE-3958) support partial scan for analyze command - RCFile
[ https://issues.apache.org/jira/browse/HIVE-3958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Work on HIVE-3958 started by Gang Tim Liu. 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, HIVE-3958.patch.2, HIVE-3958.patch.3, HIVE-3958.patch.4, HIVE-3958.patch.5 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
[jira] [Work started] (HIVE-3958) support partial scan for analyze command - RCFile
[ https://issues.apache.org/jira/browse/HIVE-3958?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Work on HIVE-3958 started by Gang Tim Liu. 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, HIVE-3958.patch.2, HIVE-3958.patch.3 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
