[ https://issues.apache.org/jira/browse/FLINK-15004?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kurt Young updated FLINK-15004: ------------------------------- Affects Version/s: (was: 1.9.0) 1.10.0 > Choose two-phase Aggregate if the statistics is unknown > ------------------------------------------------------- > > Key: FLINK-15004 > URL: https://issues.apache.org/jira/browse/FLINK-15004 > Project: Flink > Issue Type: Improvement > Components: Table SQL / Planner > Affects Versions: 1.10.0, 1.9.1 > Reporter: godfrey he > Assignee: godfrey he > Priority: Major > Labels: pull-request-available > Time Spent: 10m > Remaining Estimate: 0h > > Currently, blink planner will use default rowCount value (defined in > {{FlinkPreparingTableBase#DEFAULT_ROWCOUNT}} ) when the statistics is > unknown, and maybe choose one-phase Aggregate. The job will hang if the data > is skewed. So It's better to use two-phase Aggregate for execution stability > if the statistics is unknown. -- This message was sent by Atlassian Jira (v8.3.4#803005)