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Lefty Leverenz edited comment on HIVE-14035 at 11/14/17 2:48 AM: ----------------------------------------------------------------- Doc note: Besides the design document, which should be added to the wiki, there is a new configuration parameter (*hive.txn.operational.properties*) that will need to be documented in the wiki for release 2.2.0. * [Configuration Properties -- Transactions and Compactor | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-TransactionsandCompactor] Added a TODOC2.2 label. Update 13/Nov/17: *hive.txn.operational.properties* does not need to be documented. Its description is changed by HIVE-14878 and HIVE-17458. was (Author: le...@hortonworks.com): Doc note: Besides the design document, which should be added to the wiki, there is a new configuration parameter (*hive.txn.operational.properties*) that will need to be documented in the wiki for release 2.2.0. * [Configuration Properties -- Transactions and Compactor | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-TransactionsandCompactor] Added a TODOC2.2 label. > Enable predicate pushdown to delta files created by ACID Transactions > --------------------------------------------------------------------- > > Key: HIVE-14035 > URL: https://issues.apache.org/jira/browse/HIVE-14035 > Project: Hive > Issue Type: New Feature > Components: Transactions > Reporter: Saket Saurabh > Assignee: Saket Saurabh > Labels: TODOC2.2 > Fix For: 2.3.0 > > Attachments: Design.Document.Improving ACID performance in > Hive.01.docx, Design.Document.Improving ACID performance in Hive.02.docx, > HIVE-14035.02.patch, HIVE-14035.03.patch, HIVE-14035.04.patch, > HIVE-14035.05.patch, HIVE-14035.06.patch, HIVE-14035.07.patch, > HIVE-14035.08.patch, HIVE-14035.09.patch, HIVE-14035.10.patch, > HIVE-14035.11.patch, HIVE-14035.12.patch, HIVE-14035.13.patch, > HIVE-14035.14.patch, HIVE-14035.15.patch, HIVE-14035.16.patch, > HIVE-14035.17.patch, HIVE-14035.patch > > > In current Hive version, delta files created by ACID transactions do not > allow predicate pushdown if they contain any update/delete events. This is > done to preserve correctness when following a multi-version approach during > event collapsing, where an update event overwrites an existing insert event. > This JIRA proposes to split an update event into a combination of a delete > event followed by a new insert event, that can enable predicate push down to > all delta files without breaking correctness. To support backward > compatibility for this feature, this JIRA also proposes to add some sort of > versioning to ACID that can allow different versions of ACID transactions to > co-exist together. -- This message was sent by Atlassian JIRA (v6.4.14#64029)