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From "Kathleen Ting (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SQOOP-474) Split-by specification incorrectly triggers bounding value query
Date Mon, 02 Apr 2012 21:35:24 GMT

     [ https://issues.apache.org/jira/browse/SQOOP-474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kathleen Ting updated SQOOP-474:
--------------------------------

    Attachment: SQOOP-474.patch
    
> Split-by specification incorrectly triggers bounding value query
> ----------------------------------------------------------------
>
>                 Key: SQOOP-474
>                 URL: https://issues.apache.org/jira/browse/SQOOP-474
>             Project: Sqoop
>          Issue Type: Bug
>          Components: build, connectors/generic
>    Affects Versions: 1.4.2-incubating
>            Reporter: Kathleen Ting
>            Assignee: Kathleen Ting
>         Attachments: SQOOP-474.patch
>
>
> To reproduce this, run an import using a query with number of mappers set to 1 and a
split-by specification. For example:
> {code}
> $ sqoop import --connect jdbc:mysql://localhost/hadoopguide --query 'SELECT A.*, B.*
FROM A JOIN B ON (A.AID = B.BID) WHERE $CONDITIONS' --split-by AID --target-dir /user/kateting/test1
--m=1
> {code}
> This import will output the following:
> {code}
> 12/04/02 13:29:59 INFO db.DataDrivenDBInputFormat: BoundingValsQuery: SELECT MIN(AID),
MAX(AID) FROM (SELECT A.*, B.* FROM A JOIN B ON (A.AID = B.BID) WHERE  (1 = 1) ) AS t1
> {code}
> The problem is that the bounding value query construction is being triggered because
of the --split-by specification. However specifying split-by is redundant given that the number
of mappers is 1.

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