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https://issues.apache.org/jira/browse/SQOOP-489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13285029#comment-13285029
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Cheolsoo Park commented on SQOOP-489:
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OK, thanks for clarification, Jarcec. I agree with you.
I think that there are two cases that we have to deal with:
1) sqoop create-hive-table --table FOO --hive-partition-key X
2) sqoop import --hive-import --table FOO --hive-partition-key X
Following Jarcec's suggestion, the fix would be summarized as follows:
For 1),
--hive-partition-key X is invalid if X is a column of table FOO. (Note that as
of now, --columns is not available for create-hive-table.)
For 2),
i) if --columns is not specified, --hive-partition-key X is invalid if X is a
column of table FOO.
ii) if --columns is specified, --hive-partition-key X is invalid if X is
specified in --columns.
Currently, Sqoop generates ill-formed Hive queries for these cases; however,
Sqoop should rather print a proper warning message.
Please let me know if anyone has other opinions.
> Cannot define partition keys for Hive tables created through Sqoop
> ------------------------------------------------------------------
>
> Key: SQOOP-489
> URL: https://issues.apache.org/jira/browse/SQOOP-489
> Project: Sqoop
> Issue Type: Bug
> Affects Versions: 1.4.1-incubating
> Reporter: Kathleen Ting
> Assignee: Cheolsoo Park
> Attachments: SQOOP-489.patch
>
>
> By enabling the table option, Sqoop includes every column in the table in the
> create table query, and by enabling the hive-partition-key option, Sqoop
> blindly appends the "partitioned by" clause. Now if you specify one of
> columns in the table in the hive-partition-key, this will cause a syntax
> error in Hive.
> For example, if we have a table 'FOO' that has columns 'I' and 'J':
> sqoop create-hive-table --table FOO ...
> will generate the following Hive query:
> CREATE TABLE IF NOT EXISTS `FOO` ( `I` STRING, `J` STRING)
> Now if we add "--hive-partition-key I" to the command, Sqoop generates the
> following query:
> CREATE TABLE IF NOT EXISTS `FOO` ( `I` STRING, `J` STRING) PARTITIONED BY (I
> STRING)
> The problem is that since 'I' is defined twice (once in CRATE TABLE and once
> in PARTITIONED BY), this is a syntax error in Hive.
> This correct query would be something like:
> CREATE TABLE IF NOT EXISTS `FOO` (`J` STRING) PARTITIONED BY (I STRING)
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