[ https://issues.apache.org/jira/browse/FLINK-11882?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated FLINK-11882: ----------------------------------- Labels: pull-request-available (was: ) > Introduce BytesHashMap to batch hash agg > ---------------------------------------- > > Key: FLINK-11882 > URL: https://issues.apache.org/jira/browse/FLINK-11882 > Project: Flink > Issue Type: New Feature > Components: Runtime / Operators > Reporter: Jingsong Lee > Assignee: Jingsong Lee > Priority: Major > Labels: pull-request-available > > Introduce bytes based hash table. > It can be used for performing aggregations where the aggregated values are > fixed-width. > Because the data is stored in continuous memory, AggBuffer of variable length > cannot be applied to this HashMap. The KeyValue form in hash map is designed > to reduce the cost of key fetching in lookup. > Add a test to do a complete hash agg. When HashMap has enough memory, pure > hash AGG is performed; when memory is insufficient, it degenerates into sort > agg. -- This message was sent by Atlassian JIRA (v7.6.3#76005)