[ https://issues.apache.org/jira/browse/HIVE-26137?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated HIVE-26137: ---------------------------------- Labels: pull-request-available (was: ) > Optimized transfer of Iceberg residual expressions from AM to execution > ----------------------------------------------------------------------- > > Key: HIVE-26137 > URL: https://issues.apache.org/jira/browse/HIVE-26137 > Project: Hive > Issue Type: Improvement > Reporter: Ádám Szita > Priority: Major > Labels: pull-request-available > Time Spent: 10m > Remaining Estimate: 0h > > HIVE-25967 introduced a hack to prevent Iceberg filter expressions to be > serialized into splits. This temporary fix was to avoid OOM problems on Tez > AM side, but at the same time prevented predicate pushdowns to work on the > execution side too. > This ticket intends to incorporate the long term solution. It turns out that > the file scan tasks created by Iceberg actually don't contain a "residual" > expressions, but rather a complete/original one. It becomes residual only > when it is evaluated against the tasks' partition value, which only happens > on the execution site. This means that the original filter is the same > expression for all splits in Tez AM, so we can transfer it via job conf > instead. -- This message was sent by Atlassian Jira (v8.20.1#820001)