The trace query commands tell you which trace components and levels are either activated or deactivated for every component. Be aware that these commands may show a voluminous amount of information that does not pertain to the components in which you are interested.
To list all of the trace level/component combinations currently active, issue the following command:
SET TRACEON = ?
To list all of the trace level/component combinations not currently active, issue the following command:
SET TRACEOFF = ?
The following command queries the active traces. None are activated:
> > set traceon = ?
Name Level Description Set Comp.ID
> >
The next commands activate the SQLCALL and STMTRACE traces:
SET TRACEON = SQLCALL//CLIENT
SET TRACEON = STMTRACE//CLIENT
Now, issuing the query command generates a list of all active trace components:
> > set traceon = ?
Name Level Description Set Comp.ID
STMTRACE 1 SQL/MDX generated statement trace Y AE
STMTRACE 2 SQL/MDX generated substatement trc Y AF
SQLCALL 1 SQL call to physical layer Y BH
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