You typically need to gather statistics for your system before the optimizer for your RDBMS can determine the most efficient way to execute SQL statements. If you are a master user with responsibility for verifying source files in a multiuser environment, you will almost always want to gather system statistics after verification to improve performance of the COBOL Analyzer analysis tools.
To gather system statistics, choose Prepare > Compute Database Statistics. You can view the generated statistics in your RDBMS.