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https://issues.apache.org/jira/browse/HIVE-626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12730188#action_12730188
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Yongqiang He commented on HIVE-626:
-----------------------------------
The reason is the inconsistent of the order of columns in reduceSink's
rowschema and the order of columns in reduce sink's output column array.
rowschema is used to create a file output op when splitting mr tasks, and the
output column names are used to init the inspector.
will upload a patch soon.
> Typecast bug in Join operator
> -----------------------------
>
> Key: HIVE-626
> URL: https://issues.apache.org/jira/browse/HIVE-626
> Project: Hadoop Hive
> Issue Type: Bug
> Reporter: Zheng Shao
> Attachments: HIVE-626.1.showinfo.patch,
> HIVE-626.2.showinfo_disable_cp.patch
>
>
> There is a type cast error in Join operator. Produced by the following steps:
> {code}
> create table zshao_foo (foo_id int, foo_name string, foo_a string, foo_b
> string,
> foo_c string, foo_d string) row format delimited fields terminated by ','
> stored as textfile;
> create table zshao_bar (bar_id int, bar_0 int, foo_id int, bar_1 int, bar_name
> string, bar_a string, bar_b string, bar_c string, bar_d string) row format
> delimited fields terminated by ',' stored as textfile;
> create table zshao_count (bar_id int, n int) row format delimited fields
> terminated by ',' stored as textfile;
> Each table has a single row as follows:
> zshao_foo:
> 1,foo1,a,b,c,d
> zshao_bar:
> 10,0,1,1,bar10,a,b,c,d
> zshao_count:
> 10,2
> load data local inpath 'zshao_foo' overwrite into table zshao_foo;
> load data local inpath 'zshao_bar' overwrite into table zshao_bar;
> load data local inpath 'zshao_count' overwrite into table zshao_count;
> explain extended
> select zshao_foo.foo_name, zshao_bar.bar_name, n from zshao_foo join
> zshao_bar on zshao_foo.foo_id =
> zshao_bar.foo_id join zshao_count on zshao_count.bar_id = zshao_bar.bar_id;
> {code}
> The case is from David Lerman.
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