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From "Ramprasad (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SQOOP-3132) sqoop export from Hive table stored in Parquet format to Oracle CLOB column results in (null)
Date Fri, 10 Feb 2017 09:16:41 GMT
Ramprasad created SQOOP-3132:
--------------------------------

             Summary: sqoop export from Hive table stored in Parquet format to Oracle CLOB
column results in (null)
                 Key: SQOOP-3132
                 URL: https://issues.apache.org/jira/browse/SQOOP-3132
             Project: Sqoop
          Issue Type: Bug
          Components: connectors/oracle, hive-integration
    Affects Versions: 1.4.6
         Environment: sandbox
            Reporter: Ramprasad
            Priority: Critical



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I am trying to export a String column from Hive table (stored in Parquet format) to Oracle
CLOB data type column using sqoop export. Below are the commands I run for creation of tables
in Oracle & Hive and, the sqoop command I use to to export the data.

Table creation & insert into Hive: 
create table default.sqoop_oracle_clob_test (sample_id int, verylargestring String) stored
as PARQUET; 
[SUCCESS] 

insert into default.sqoop_oracle_clob_test (sample_id, verylargestring) values (123, "Really
a very large String"); 
insert into default.sqoop_oracle_clob_test (sample_id, verylargestring) values (456, "Another
very large String"); 
[SUCCESS]

Table creation in Oracle 
create table sqoop_exported_oracle (sample_id NUMBER, verylargestring CLOB); 
[success] 

Sqoop export command:
sqoop \
export \
--connect jdbc:oracle:thin:@//host:port/database_name \
--username ****** \
--password ****** \
--table sqoop_exported_oracle \
--columns SAMPLE_ID,VERYLARGESTRING \
--map-column-java "VERYLARGESTRING=String" \
--hcatalog-table "sqoop_oracle_clob_test" \
--hcatalog-database "default"


sqoop job executes fine without any error messages and displays the message Exported 2 records.

The result in Oracle table is as below,

select * from sqoop_exported_oracle;

sample_id | verylargestring
123 | (null)
456 | (null) 


I tried using --staging-table as well but, resulted in same. I suspect this is a bug while
exporting to oracle CLOB columns when retrieving from Hive which is stored in parquet format.



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