[ https://issues.apache.org/jira/browse/IMPALA-11591?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zoltán Borók-Nagy reassigned IMPALA-11591: ------------------------------------------ Assignee: Zoltán Borók-Nagy > Avoid calling planFiles() on Iceberg tables when there are no predicates > ------------------------------------------------------------------------ > > Key: IMPALA-11591 > URL: https://issues.apache.org/jira/browse/IMPALA-11591 > Project: IMPALA > Issue Type: Improvement > Reporter: Zoltán Borók-Nagy > Assignee: Zoltán Borók-Nagy > Priority: Major > Labels: impala-iceberg > > Currently we always invoke Iceberg's planFiles() API for creating Iceberg > scans. > When there are no predicates (and no time travel) on the table we could avoid > that because we already cache everything we need (schema, partition > information, file descriptors). > We can also consider only pushing down predicates if at least one of the > predicates refer to a partition column. Otherwise it's possible that the > overhead of reading, decoding, evaluating all the manifest files is too large. > I think the change should be fairly simple, we just need to take care: > * store delete files separately, so we can still do the V2 scans from cache > * During time-travel we also cache old file descriptors, so we need to > separate them from the actual snapshot's file descriptors. -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org