Messages in this thread | | | Date | Sun, 1 Aug 2021 15:39:25 +0200 | From | "Ahmed S. Darwish" <> | Subject | Re: [PATCH 17/17] libtracefs: Add man page for tracefs_sql() |
| |
On Fri, Jul 30, 2021, Steven Rostedt wrote: > + > +The SQL format is as follows: > + > +*SELECT* <fields> FROM <start-event> JOIN <end-event> ON <matching-fields> WHERE <filter> > + > +Note, although the examples show the SQL commands in uppercase, they are not required to > +be so. That is, you can use "SELECT" or "select" or "sElEct". > +
Maybe it would be helpful to mention that, unlike normal SELECT queries, the JOIN and ON parts above are _not_ optional?
That is, generic "one event source" queries:
SELECT common_pid,msr,val FROM write_msr WHERE msr=72
are not supported. (I wish they were though ;-))
BTW, thanks a lot for this work. It will finally make synthetic events usable!
Kind regards,
-- Ahmed S. Darwish Linutronix GmbH
| |