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https://issues.apache.org/jira/browse/HIVE-12506?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chaoyu Tang reassigned HIVE-12506:
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Assignee: Chaoyu Tang
> SHOW CREATE TABLE command creates a table that does not work for RCFile format
> ------------------------------------------------------------------------------
>
> Key: HIVE-12506
> URL: https://issues.apache.org/jira/browse/HIVE-12506
> Project: Hive
> Issue Type: Bug
> Components: Serializers/Deserializers
> Affects Versions: 1.1.1
> Reporter: Eric Lin
> Assignee: Chaoyu Tang
>
> See the following test case:
> 1) Create a table with RCFile format:
> {code}
> DROP TABLE IF EXISTS test;
> CREATE TABLE test (a int) PARTITIONED BY (p int)
> ROW FORMAT DELIMITED FIELDS TERMINATED BY '|'
> STORED AS RCFILE;
> {code}
> 2) run "DESC FORMATTED test"
> {code}
> # Storage Information
> SerDe Library: org.apache.hadoop.hive.serde2.columnar.ColumnarSerDe
> InputFormat: org.apache.hadoop.hive.ql.io.RCFileInputFormat
> OutputFormat: org.apache.hadoop.hive.ql.io.RCFileOutputFormat
> {code}
> shows that SerDe used is "ColumnarSerDe"
> 3) run "SHOW CREATE TABLE" and get the output:
> {code}
> CREATE TABLE `test`(
> `a` int)
> PARTITIONED BY (
> `p` int)
> ROW FORMAT DELIMITED
> FIELDS TERMINATED BY '|'
> STORED AS INPUTFORMAT
> 'org.apache.hadoop.hive.ql.io.RCFileInputFormat'
> OUTPUTFORMAT
> 'org.apache.hadoop.hive.ql.io.RCFileOutputFormat'
> LOCATION
> 'hdfs://node5.lab.cloudera.com:8020/user/hive/warehouse/case_78732.db/test'
> TBLPROPERTIES (
> 'transient_lastDdlTime'='1448343875')
> {code}
> Note that there is no mention of "ColumnarSerDe"
> 4) Drop the table and then create the table again using the output from 3)
> 5) Check the output of "DESC FORMATTED test"
> {code}
> # Storage Information
> SerDe Library: org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe
> InputFormat: org.apache.hadoop.hive.ql.io.RCFileInputFormat
> OutputFormat: org.apache.hadoop.hive.ql.io.RCFileOutputFormat
> {code}
> The SerDe falls back to "LazySimpleSerDe", which is not correct.
> Any further query tries to INSERT or SELECT this table will fail with errors
> I suspect that we can't specify ROW FORMAT DELIMITED with ROW FORMAT SERDE at
> the same time at table creation, this causes confusion to end users as copy
> table structure using "SHOW CREATE TABLE" will not work.
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