[jira] [Assigned] (NIFI-4393) AbstractDatabaseFetchProcessor handles SQL Server brackets incorrectly

["Koji Kawamura (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/NIFI-4393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Koji Kawamura reassigned NIFI-4393:
-----------------------------------

    Assignee: Koji Kawamura

> AbstractDatabaseFetchProcessor handles SQL Server brackets incorrectly
> ----------------------------------------------------------------------
>
>                 Key: NIFI-4393
>                 URL: https://issues.apache.org/jira/browse/NIFI-4393
>             Project: Apache NiFi
>          Issue Type: Bug
>          Components: Extensions
>    Affects Versions: 1.4.0
>            Reporter: Mikołaj Siedlarek
>            Assignee: Koji Kawamura
>            Priority: Major
>         Attachments: 0001-Handle-SQL-Server-square-brackets-in-AbstractDatabas.patch
>
>
> SQL Server allows column names to contain whitespace, in which case they are written in SQL queries inside square brackets. When using processors based on {{AbstractDatabaseFetchProcessor}}, such as {{QueryDatabaseTable}} they have to be specified in  "Maximum-value Columns" in square brackets, because otherwise they would break a SELECT query. However, when such column name is retrieved from ResultSetMetaData, the driver returns it without square brackets. This causes a mismatch between the key used to save last seen maximum value in processor's state and the one used to search for the value later.
> I'm not sure whether the attached patch is very elegant, but it fixes the issue in a simplest way possible.



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