4. The computer-implemented method of claim 1 , wherein determining one or more context costs comprises determining whether said batch processing job comprises one or more candidate query contexts.
5. The computer-implemented method of claim 4 , wherein determining whether said batch processing job comprises comparable access paths comprises: counting one or more candidate query contexts; and responsive to said batch processing job comprising two or more candidate query contexts, determining that said batch processing job comprises comparable access paths; and responsive to said batch processing job comprising only one candidate query contexts, determining that said batch processing job does not comprise comparable access paths.