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https://issues.apache.org/jira/browse/DERBY-5869?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13419132#comment-13419132
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Steffen Lutter commented on DERBY-5869:
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Hi Rick, thank you for the prompt response! I just went to the debugger to
check where in our product this is coming from, and indeed this is the default
if no character was returned. So I can fix this on our side. But you are right,
DERBY-5862 is related as ideally there should be support, then I could remove
the workaround. I will close this issue. Thank you!
> getProcedureColumns doesn't handle escaping in patterns correctly
> -----------------------------------------------------------------
>
> Key: DERBY-5869
> URL: https://issues.apache.org/jira/browse/DERBY-5869
> Project: Derby
> Issue Type: Bug
> Components: JDBC
> Affects Versions: 10.9.1.0
> Reporter: Steffen Lutter
>
> When querying the procedure columns, according to the JDBC standard pattern
> characters are escaped, like _ and % if necessary. The escape character is
> here taken from the function getSearchStringEscape(), which returns "\". The
> problem is, that derby doesn’t seem to accept the escaping in case of _
> (underscore), and uses the escape characters within the match which leads to
> the situation that the stored proc is not found (Exception thrown)
> Example:
> We have a stored procedure MY_PROC.
> getConnection ().getMetaData ().getProcedureColumns (null, null, ”MY\\_PROC”
> ,"%") => Stored proc is not found
> getConnection ().getMetaData ().getProcedureColumns (null, null, ”MY_PROC”
> ,"%") => Stored proc is found
> The first case is the problem, as the _ needs escaping. For the second case
> it works, even though theoretically also procedures called MY-PROC, MY+PROC,
> MYXPROC would match.
> http://docs.oracle.com/javase/6/docs/api/java/sql/DatabaseMetaData.html
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