[OJB-91] Query performance slowdown (about 20%) between 1.0.3 and 1.0.4

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.0.4
• Fix Version/s: 1.0.5
• Assignee: Armin Waibel
• Reporter: Armin Waibel
• Created: 21/Jan/06 18:59
• Updated: 22/Jan/06 18:33
• Resolved: 22/Jan/06 02:23

Description

The query performance slowdown in 1.0.4 compared with 1.0.3. It was caused by a column check in RowReaderImpl. For each row of a result set OJB checks for a specific column named "OJB_CLAZZ" used to specify the real class name of the associated object instance when "table per subclass"-inheritance was used.
This check should only happen when "table per subclass"-inheritance was used, else the jdbc-driver will throw an exception on each object materialization.