Bugs item #1550456, was opened at 2006-09-01 05:52
Message generated for change (Settings changed) made by tdonohue
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Category: DBMS
Group: None
>Status: Closed
>Resolution: Out of Date
Priority: 5
Private: No
Submitted By: Richard Jones (richard-jones)
Assigned to: Nobody/Anonymous (nobody)
Summary: TableRow doesn't contain table name in some cases
Initial Comment:
The following use of the DatabaseManager,
TableRowIterator, and TableRow will cause an NPE:
Object[] params = { new Integer(id) };
TableRowIterator tri =
DatabaseManager.query(context, someQuery, params);
while (tri.hasNext())
{
row = tri.next();
row.setColumn("my_column", someValue);
DatabaseManager.update(context, row);
}
Such that:
java.lang.NullPointerException
at
org.dspace.storage.rdbms.DatabaseManager.retrieveColumnInfo(DatabaseManager.java:1527)
at
org.dspace.storage.rdbms.DatabaseManager.getColumnInfoInternal(DatabaseManager.java:1498)
at
org.dspace.storage.rdbms.DatabaseManager.getColumnInfo(DatabaseManager.java:890)
at
org.dspace.storage.rdbms.DatabaseManager.getPrimaryKeyColumnInfo(DatabaseManager.java:1348)
at
org.dspace.storage.rdbms.DatabaseManager.update(DatabaseManager.java:838)
This appears to be because the operation:
row.getTable()
returns null when the query method of DatabaseManager
with the signature as above is used to generate the
row. The TableRowIterator generated by this query
method holds the value of the table as null, and
propagates this into each TableRow object that it
generates when next() is called.
There is no obvious workaround in implementing code.
----------------------------------------------------------------------
Comment By: Richard Jones (richard-jones)
Date: 2006-09-01 06:04
Message:
Logged In: YES
user_id=1021756
Actually, there is an alternative to use queryTable, which
does work.
So does this technically count as a bug? It was not
immediately clear what the problem was, or what the
solution might be
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