TSO interfacing notes for installers The following topics contain special TSO interfacing notes for installers. Db2 SQL Performance Analyzer variables in the ISPF user profileDb2 SQL Performance Analyzer makes liberal use of ISPF profile variable storage, and keeps the latest values for the TSO interface parameters there. Therefore, the latest values are retained between runs.Host variable support from any TSO input mediumDb2 SQL Performance Analyzer allows you to specify host variable names in SQL submitted for analysis under TSO (and QMF™), in addition to their typical use within application programs, and subsequent DBRMs.SQL PA supports upper and lower caseDb2 SQL Performance Analyzer handles SQL in both upper and lower case. All lower case values get translated to upper case before processing unless the NLSCODE parameter is in effect (DBCS or Mixed Data names). SQL PA's translation to upper case avoids any problems that might occur because of lower case Db2® object names.Parent topic: Troubleshooting SQL PA