Joey Echeverria created HIVE-3171:
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Summary: Bucketed sort merge join doesn't work on tables with more
than one partition
Key: HIVE-3171
URL: https://issues.apache.org/jira/browse/HIVE-3171
Project: Hive
Issue Type: Bug
Reporter: Joey Echeverria
Executing a query with the MAPJOIN hint and the bucketed sort merge join
optimizations enabled:
{noformat}
set hive.input.format=org.apache.hadoop.hive.ql.io.BucketizedHiveInputFormat;
set hive.optimize.bucketmapjoin = true;
set hive.optimize.bucketmapjoin.sortedmerge = true;
{noformat}
works fine with partitioned tables if there is only one partition in the table.
However, if you add a second partition, Hive attempts to do a regular map-side
join which can fail because the tables are too large. Hive ought to be able to
still do the bucketed sort merge join with partitions.
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