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Date: Mon, 13 Jun 2016 18:00:23 +0000 (UTC)
From: "Danoja Dias (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Message-ID: <JIRA.12456793.1266596772000.72530.1465840823466@Atlassian.JIRA>
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Subject: [jira] [Commented] (DERBY-4555) Expand SYSCS_IMPORT_TABLE to accept
 CSV file with header lines
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archived-at: Mon, 13 Jun 2016 18:00:25 -0000


    [ https://issues.apache.org/jira/browse/DERBY-4555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15327850#comment-15327850 ] 

Danoja Dias commented on DERBY-4555:
------------------------------------

According to TEST-org.apache.derbyTesting.functionTests.tests.upgradeTests._Suite.xml

The class name of the test is org.apache.derbyTesting.functionTests.tests.upgradeTests.PhaseChanger

Gives an exception as follows.
ERROR X0Y68: PROCEDURE SYSCS_IMPORT_TABLE already exists.

This happens at DataDictionaryImpl.java:2029 when addDiscriptor() method is called by createSystemProcedureOrFunction() method that is invoked by create_10_13_system_procedures(). 


> Expand SYSCS_IMPORT_TABLE to accept CSV file with header lines
> --------------------------------------------------------------
>
>                 Key: DERBY-4555
>                 URL: https://issues.apache.org/jira/browse/DERBY-4555
>             Project: Derby
>          Issue Type: Improvement
>          Components: Miscellaneous
>            Reporter: Yair Lenga
>            Assignee: Danoja Dias
>         Attachments: NoVarargs.diff, Varargs.diff, gotException.diff, hardCoded.diff, latest.diff, noHeaderLines.csv, petlist.csv, petlist.csv, petlist.csv, repro.java, repro.java, skipHeaders.diff
>
>
> The SYSCS_IMPORT_TABLE (and SYSCS_IMPORT_DATA) function allow import of data from external resources. In general, they can process CSV files that created with various tools - with one exception: the header line.
> While there is no accepted standard, most tools will include a header line in the CSV file with column names. This convention is supported in Excel and many other tools.
> My Request: extend the SYSCS_IMPORT_TABLe and SYSCS_IMPORT_DATA (and other related procedures) to include an extra indicator for the number of header lines to be ignored.
> As an extra bonus it will be help is the SYSCS_IMPORT_DATA will accept column names (instead of column indexes) in the 'COLUMNINDEXES' arguments. E.g., it should be possible to indicate COLUMNINDEXES of '1,3,sales,5,'. This feature will make it significantly easier to handle cases where the external input files is extended to include additional columns.


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