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From "Steffen Lutter (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DERBY-5869) getProcedureColumns doesn't handle escaping in patterns correctly
Date Fri, 20 Jul 2012 11:34:33 GMT
Steffen Lutter created DERBY-5869:
-------------------------------------

             Summary: 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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