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From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: Extract Create Table statement from Hive
Date Tue, 22 Feb 2011 00:31:17 GMT
On Mon, Feb 21, 2011 at 6:42 PM, Jay Ramadorai
<jramadorai@tripadvisor.com> wrote:
> Does anyone have a way of generating the create table statement for a table
> that is in Hive?  I see a jira for
> this https://issues.apache.org/jira/browse/HIVE-967 and it appears that Ed
> Capriolo might have a solution for this. Ed, are you able to share this
> solution?
> My goal is to copy a bunch of Hive tables from one cluster to another. What
> I'd like to do is generate the DDL from one cluster and run it on the other,
> and then use DISTCP with lots of mappers to parallel-copy the table-data
> between the clusters. FYI, my metadata is in Derby. I could backup and
> restore the metadata directories but I dont want a copy of all the tables
> from the source database, only a subset.
> I tried Sqooping the table out of Hive, but it runs into :
> 11/02/21 18:23:50 ERROR manager.SqlManager: Error executing statement:
> java.sql.SQLException: Method not supported
> 11/02/21 18:23:50 ERROR sqoop.Sqoop: Got exception running Sqoop:
> java.lang.NullPointerException
> java.lang.NullPointerException
> at
> com.cloudera.sqoop.hive.TableDefWriter.getCreateTableStmt(TableDefWriter.java:133)
> Apparently the Hive Thrift jdbc driver doesnt support extracting table
> metadata.
> Please feel free to suggest alternative approaches.
> thanks
> Jay
>
>
I do have some code that can generate DML. It is a separate problem
that talks to the metastore (outside of the hive cli). I will throw
the code up in the Jira tomorrow. However the plan for the Jira is to
incorporate this in hive with a show create table.

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