[PATCH 14/21] perf scripts python: export-to-postgresql.py: Add has_calls column to comms table

[Adrian Hunter <adrian.hunter@intel.com>]

Now that a thread's current comm is exported, it shows up in the call graph
and call tree even if it has no calls. That can happen because the calls
are recorded against the main thread's initial comm.

Add a table column to make it easy for the exported-sql-viewer.py script to
select only comms with calls.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
 tools/perf/scripts/python/export-to-postgresql.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/scripts/python/export-to-postgresql.py b/tools/perf/scripts/python/export-to-postgresql.py
index 01f37877f5bb..13205e4e5b3b 100644
--- a/tools/perf/scripts/python/export-to-postgresql.py
+++ b/tools/perf/scripts/python/export-to-postgresql.py
@@ -886,6 +886,8 @@ def trace_end():
 					'ADD CONSTRAINT parent_call_pathfk FOREIGN KEY (parent_call_path_id) REFERENCES call_paths (id)')
 		do_query(query, 'CREATE INDEX pcpid_idx ON calls (parent_call_path_id)')
 		do_query(query, 'CREATE INDEX pid_idx ON calls (parent_id)')
+		do_query(query, 'ALTER TABLE comms ADD has_calls boolean')
+		do_query(query, 'UPDATE comms SET has_calls = TRUE WHERE comms.id IN (SELECT DISTINCT comm_id FROM calls)')
 	do_query(query, 'ALTER TABLE ptwrite '
 					'ADD CONSTRAINT idfk        FOREIGN KEY (id)           REFERENCES samples   (id)')
 	do_query(query, 'ALTER TABLE  cbr '
-- 
2.17.1