osrfsys.log:

2019-01-23 06:26:14 myhost open-ils.cstore: [INFO:30353:osrf_application.c:1075:15482427033033330] CALL: open-ils.cstore open-ils.cstore.json_query.atomic {"select":{"cbreb":[{"aggregate":"true","transform":"count","alias":"count","column":"id"}]},"from":"cbreb","where":{"owner":426953,"btype":"bookbag"}}
2019-01-23 06:26:14 myhost open-ils.cstore: [INFO:30353:osrf_app_session.c:1177:15482427033033330] [open-ils.cstore] sent 382 bytes of data to opensrf@private.myhost.gapines.org/client_at_myhost.gapines.org_30333
2019-01-23 06:26:14 myhost open-ils.cstore: [INFO:30353:osrf_stack.c:163:15482427033033330] Message processing duration 0.000638
2019-01-23 06:26:14 myhost osrf_json_gw: [INFO:30333:CStoreEditor.pm:139:15482427033033330] editor[1|426953] json_query : returned 1 result(s)
2019-01-23 06:26:20 myhost open-ils.cstore: [INFO:30353:osrf_prefork.c:496:15482427033033330] No request was received in 6 seconds, exiting stateful session
2019-01-23 06:26:20 myhost open-ils.cstore: [INFO:30353:osrf_app_session.c:1177:15482427033033330] [open-ils.cstore] sent 196 bytes of data to opensrf@private.myhost.gapines.org/client_at_myhost.gapines.org_30333

DB log:

Jan 23 06:26:14 dbhost postgres[41547]: [899-1] db=mydb,user=mydbuser LOG:  duration: 0.191 ms  statement: SELECT  count("cbreb".id ) AS "count" FROM container.biblio_record_entry_bucket AS "cbreb"  WHERE "cbreb".owner = 426953 AND "cbreb".btype = 'bookbag';