Daniel Dai created HIVE-17421: --------------------------------- Summary: Clear incorrect stats after replication Key: HIVE-17421 URL: https://issues.apache.org/jira/browse/HIVE-17421 Project: Hive Issue Type: Bug Components: repl Reporter: Daniel Dai Assignee: Daniel Dai
After replication, some stats summary are incorrect. If hive.compute.query.using.stats set to true, we will get wrong result on the destination side. This will not happen with bootstrap replication. This is because stats summary are in table properties and will be replicated to the destination. However, in incremental replication, this won't work. When creating table, the stats summary are empty (eg, numRows=0). Later when we insert data, stats summary are updated with update_table_column_statistics/update_partition_column_statistics, however, both events are not captured in incremental replication. Thus on the destination side, we will get count(*)=0. The simple solution is to remove COLUMN_STATS_ACCURATE property after incremental replication. -- This message was sent by Atlassian JIRA (v6.4.14#64029)