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https://issues.apache.org/jira/browse/HIVE-6412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13910779#comment-13910779
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Xuefu Zhang commented on HIVE-6412:
-----------------------------------
I tried the queries in the latest trunk and wasn't able to reproduce the
problem. Presumably the problem is fixed. [~rusanu] Could you please verify?
> SMB join on Decimal columns causes cast exception in JoinUtil.computeKeys
> -------------------------------------------------------------------------
>
> Key: HIVE-6412
> URL: https://issues.apache.org/jira/browse/HIVE-6412
> Project: Hive
> Issue Type: Bug
> Reporter: Remus Rusanu
> Assignee: Xuefu Zhang
> Priority: Critical
>
> {code}
> Caused by: java.lang.ClassCastException:
> org.apache.hadoop.hive.serde2.io.HiveDecimalWritable cannot be cast to
> org.apache.hadoop.hive.common.type.HiveDecimal
> at
> org.apache.hadoop.hive.serde2.objectinspector.primitive.JavaHiveDecimalObjectInspector.getPrimitiveWritableObject(JavaHiveDecimalObjectInspector.java:49)
> at
> org.apache.hadoop.hive.serde2.objectinspector.primitive.JavaHiveDecimalObjectInspector.getPrimitiveWritableObject(JavaHiveDecimalObjectInspector.java:27)
> at
> org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils.copyToStandardObject(ObjectInspectorUtils.java:281)
> at
> org.apache.hadoop.hive.ql.exec.JoinUtil.computeKeys(JoinUtil.java:143)
> at
> org.apache.hadoop.hive.ql.exec.SMBMapJoinOperator$MergeQueue.next(SMBMapJoinOperator.java:809)
> at
> org.apache.hadoop.hive.ql.exec.SMBMapJoinOperator$MergeQueue.nextHive(SMBMapJoinOperator.java:771)
> at
> org.apache.hadoop.hive.ql.exec.SMBMapJoinOperator$MergeQueue.setupContext(SMBMapJoinOperator.java:710)
> at
> org.apache.hadoop.hive.ql.exec.SMBMapJoinOperator.setUpFetchContexts(SMBMapJoinOperator.java:538)
> at
> org.apache.hadoop.hive.ql.exec.SMBMapJoinOperator.processOp(SMBMapJoinOperator.java:248)
> at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:790)
> at
> org.apache.hadoop.hive.ql.exec.TableScanOperator.processOp(TableScanOperator.java:92)
> at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:790)
> at
> org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:524)
> {code}
> Repro:
> {code}
> create table vsmb_bucket_1(key decimal(9,0), value decimal(38,10))
> CLUSTERED BY (key)
> SORTED BY (key) INTO 1 BUCKETS
> STORED AS ORC;
> create table vsmb_bucket_2(key decimal(19,3), value decimal(28,0))
> CLUSTERED BY (key)
> SORTED BY (key) INTO 1 BUCKETS
> STORED AS ORC;
>
> insert into table vsmb_bucket_1
> select cast(cint as decimal(9,0)) as key,
> cast(cfloat as decimal(38,10)) as value
> from alltypesorc limit 2;
> insert into table vsmb_bucket_2
> select cast(cint as decimal(19,3)) as key,
> cast(cfloat as decimal(28,0)) as value
> from alltypesorc limit 2;
> set hive.optimize.bucketmapjoin = true;
> set hive.optimize.bucketmapjoin.sortedmerge = true;
> set hive.auto.convert.sortmerge.join.noconditionaltask = true;
> set hive.input.format =
> org.apache.hadoop.hive.ql.io.BucketizedHiveInputFormat;
> explain
> select /*+MAPJOIN(a)*/ * from vsmb_bucket_1 a join vsmb_bucket_2 b on a.key =
> b.key;
> select /*+MAPJOIN(a)*/ * from vsmb_bucket_1 a join vsmb_bucket_2 b on a.key =
> b.key;
> {code}
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