#4 Nodes of RTree are never deleted, index structure permanently grows

[Vitali Diatchkov]

public void deleteNode(Node node) throws SQLException {
    if (deleteStmt == null) {
        deleteStmt = con.prepareStatement(dml.getDeleteIndex());
    }
    synchronized(deleteStmt) {
        try {
            deleteStmt.setLong(RTreeDml.ID_COL, node.getId());
        } catch (SQLException sqle) {
            try {
                deleteStmt.close();
            } catch (SQLException e) {}
            deleteStmt = null;
            throw sqle;                
        }
    }
}

DELETE is never executed in RTreeSessionDb.
So, index table never gets smaller (nodes of RTree are not removed from tree).