Step 6. Test the Expression

About this task

Option 6.1 Get values.
Option 6.2 Test items.
Option 6.3 List items.
Option 6.4 Query the Tracker Historical database.
Note:

Procedure

  1. If a query fails, the Query Engine will display a message to report the failure and discards debug information. If you want to save the debug information you can create a global parameter SOLVEENGINEDEBUG to have the Query Engine write it to a file.
  2. By default, the Query Engine will try to get results to a query for 15 seconds. After 15 seconds it will stop and display a time-out message. You can change the length of time by creating a global parameter SOLVEENGINE_QUERY_TIMEOUT.
  3. You can query the Tracker Historical database instead of the TADB and Tracker databases. The Tracker Historical database can be used with any of the test options.