Database Diagnostics
These options offer a convenient way to set diagnostic parameters that can help you check performance issues. See the Adaptive Server Enterprise Performance and Tuning Guide for more information. These options are connection-specific and have a default value of "Off."
To activate an option, click that option's On button, then click Apply to implement your selection(s). These values do not update when they change in the database - they are write only.
NOTE: The On|Off buttons for these options willl be unmarked after you click Apply and the command is sent to the database because jisql can not be certain of the current state of these options. For example, you click On for "Display I/O Statistics," click Apply, then execute the same statement in a batch in the Input Window, jisql does not get notified that the option's value has been changed. The messages generated for these options display according to your selection for "SQL Warnings should be presented" on the Miscellaneous tab of the Options Window.
OPTION DESCRIPTION Show query's processing plan (showplan) When set to "On," generates a description of the processing plan for the query, which can be useful in performance diagnostics. This option does not print results when it is used inside a stored procedure or trigger. The default is "Off." Compile but don't execute queries (noexec) When set to "On," compiles each query, but does not execute it. Once this option is set, no subsequent commands are executed until you turn it "Off."
Display I/O statistics (statistics io) Click "On" to display the number of scans, logical reads, and physical reads for each table referenced in the query statement. The output is always displays in the Status Window.
The default is "Off."
Display subquery cache information (statistics subquerycache)When set to "On," displays the number of cache hits, misses, and the number of rows in the subquery cache for each subquery. The default is "Off." Display parse, compile, and execution times (statistics time)When set to "On," displays the time it took to parse and compile each command; for each step of the command, it displays the time it took to execute. Times are given in milliseconds and in timeticks, the exact value of which is machine-dependent. The default is "Off."