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https://issues.apache.org/jira/browse/OPENJPA-2148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13220117#comment-13220117
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Rick Curtis commented on OPENJPA-2148:
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I think setting maxColumnNameLength to 32 would be more of a band-aid than
anything else. That being said, I'm pretty booked right now so I won't get to
this one anytime soon here. Perhaps you, or someone else on the list has some
time to dig into this problem and figure out where the real bug is.
> Issue with MaxColumnNameLength in the OracleDictionary class
> ------------------------------------------------------------
>
> Key: OPENJPA-2148
> URL: https://issues.apache.org/jira/browse/OPENJPA-2148
> Project: OpenJPA
> Issue Type: Bug
> Affects Versions: 2.1.1
> Reporter: aabbcc
> Priority: Blocker
>
> I am using oracle database with OpenJPA.
> The DBDictionary class defines default MaxColumnNameLength as 128.
> But In the OracleDictionary class which extend DBDictionary has
> MaxColumnNameLength as 30. While generating sql query, JPA takes first 28
> characters of the column name and ignores rest of the characters. Also it
> takes start & end quotes, which in total makes it to 30 characters
> Due to this, jpa query fails if there are column in the oracle database with
> more than 28 characters as it finds mismatch in SQL query and actual column
> name.
> Please fix this issue by changing MaxColumnNameLength in OracleDictionary
> class to 128.
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