lib/lp/bugs/model/bug.py _known_viewers causes per-row lookups on public bugs in bug searches.

Adding insult to injury, the lookups prejoin the world.

  File "/home/robertc/launchpad/lp-branches/working/lib/lp/services/propertycache.py", line 116, in __get__
    value = self.populate(instance)
  File "/home/robertc/launchpad/lp-branches/working/lib/lp/bugs/model/bug.py", line 1785, in _known_viewers
    pillar_owners = [bt.pillar.owner.id for bt in self.bugtasks]
  File "/home/robertc/launchpad/lp-branches/working/lib/lp/services/propertycache.py", line 116, in __get__
    value = self.populate(instance)
  File "/home/robertc/launchpad/lp-branches/working/lib/lp/bugs/model/bug.py", line 559, in bugtasks
    result = sorted(result, key=bugtask_sort_key)
  File "/home/robertc/launchpad/lp-sourcedeps/eggs/storm-0.18-py2.6-linux-x86_64.egg/storm/sqlobject.py", line 523, in __iter__
    for item in self._result_set:
  File "/home/robertc/launchpad/lp-sourcedeps/eggs/storm-0.18-py2.6-linux-x86_64.egg/storm/store.py", line 982, in __iter__
    result = self._store._connection.execute(self._get_select())
  File "/home/robertc/launchpad/lp-sourcedeps/eggs/storm-0.18-py2.6-linux-x86_64.egg/storm/databases/postgres.py", line 249, in execute
    return Connection.execute(self, statement, params, noresult)
  File "/home/robertc/launchpad/lp-sourcedeps/eggs/storm-0.18-py2.6-linux-x86_64.egg/storm/database.py", line 237, in execute
    raw_cursor = self.raw_execute(statement, params)
  File "/home/robertc/launchpad/lp-sourcedeps/eggs/storm-0.18-py2.6-linux-x86_64.egg/storm/databases/postgres.py", line 259, in raw_execute
    return Connection.raw_execute(self, statement, params)
  File "/home/robertc/launchpad/lp-sourcedeps/eggs/storm-0.18-py2.6-linux-x86_64.egg/storm/database.py", line 315, in raw_execute
    statement, params or ())
  File "/home/robertc/launchpad/lp-sourcedeps/eggs/storm-0.18-py2.6-linux-x86_64.egg/storm/database.py", line 366, in _check_disconnect
    return function(*args, **kwargs)
  File "/home/robertc/launchpad/lp-sourcedeps/eggs/storm-0.18-py2.6-linux-x86_64.egg/storm/tracer.py", line 113, in trace
    attr(*args, **kwargs)
  File "/home/robertc/launchpad/lp-branches/working/lib/canonical/launchpad/webapp/adapter.py", line 609, in connection_raw_execute
    traceback.print_stack()
......................................................................
SELECT BugTask.assignee, BugTask.bug, BugTask.bugwatch, BugTask.date_assigned, BugTask.date_closed, BugTask.date_confirmed, BugTask.date_fix_committed, BugTask.date_fix_released, BugTask.date_incomplete, BugTask.date_inprogress, BugTask.date_left_closed, BugTask.date_left_new, BugTask.date_triaged, BugTask.datecreated, BugTask.distribution, BugTask.distroseries, BugTask.id, BugTask.importance, BugTask.milestone, BugTask.owner, BugTask.product, BugTask.productseries, BugTask.sourcepackagename, BugTask.status, BugTask.statusexplanation, BugTask.targetnamecache, "_prejoin1".account, "_prejoin1".creation_comment, "_prejoin1".creation_rationale, "_prejoin1".datecreated, "_prejoin1".defaultmembershipperiod, "_prejoin1".defaultrenewalperiod, "_prejoin1".displayname, "_prejoin1".hide_email_addresses, "_prejoin1".homepage_content, "_prejoin1".icon, "_prejoin1".id, "_prejoin1".logo, "_prejoin1".mailing_list_auto_subscribe_policy, "_prejoin1".merged, "_prejoin1".mugshot, "_prejoin1".name, "_prejoin1".personal_standing, "_prejoin1".personal_standing_reason, "_prejoin1".registrant, "_prejoin1".renewal_policy, "_prejoin1".subscriptionpolicy, "_prejoin1".teamdescription, "_prejoin1".teamowner, "_prejoin1".verbose_bugnotifications, "_prejoin1".visibility, "_prejoin2".answers_usage, "_prejoin2".blueprints_usage, "_prejoin2".owner, "_prejoin2".translations_usage, "_prejoin2".active, "_prejoin2".autoupdate, "_prejoin2".bug_reported_acknowledgement, "_prejoin2".bug_reporting_guidelines, "_prejoin2".bug_supervisor, "_prejoin2".bugtracker, "_prejoin2".date_next_suggest_packaging, "_prejoin2".datecreated, "_prejoin2".description, "_prejoin2".development_focus, "_prejoin2".displayname, "_prejoin2".downloadurl, "_prejoin2".driver, "_prejoin2".enable_bug_expiration, "_prejoin2".enable_bugfiling_duplicate_search, "_prejoin2".freshmeatproject, "_prejoin2".homepage_content, "_prejoin2".homepageurl, "_prejoin2".icon, "_prejoin2".id, "_prejoin2".lastdoap, "_prejoin2".license_approved, "_prejoin2".license_info, "_prejoin2".reviewed, "_prejoin2".logo, "_prejoin2".max_bug_heat, "_prejoin2".mugshot, "_prejoin2".name, "_prejoin2".official_answers, "_prejoin2".official_blueprints, "_prejoin2".official_malone, "_prejoin2".official_rosetta, "_prejoin2".private_bugs, "_prejoin2".programminglang, "_prejoin2".project, "_prejoin2".registrant, "_prejoin2".remote_product, "_prejoin2".reviewer_whiteboard, "_prejoin2".screenshotsurl, "_prejoin2".security_contact, "_prejoin2".sourceforgeproject, "_prejoin2".summary, "_prejoin2".title, "_prejoin2".translation_focus, "_prejoin2".translationgroup, "_prejoin2".translationpermission, "_prejoin2".wikiurl, "_prejoin3".id, "_prejoin3".name, "_prejoin4".account, "_prejoin4".creation_comment, "_prejoin4".creation_rationale, "_prejoin4".datecreated, "_prejoin4".defaultmembershipperiod, "_prejoin4".defaultrenewalperiod, "_prejoin4".displayname, "_prejoin4".hide_email_addresses, "_prejoin4".homepage_content, "_prejoin4".icon, "_prejoin4".id, "_prejoin4".logo, "_prejoin4".mailing_list_auto_subscribe_policy, "_prejoin4".merged, "_prejoin4".mugshot, "_prejoin4".name, "_prejoin4".personal_standing, "_prejoin4".personal_standing_reason, "_prejoin4".registrant, "_prejoin4".renewal_policy, "_prejoin4".subscriptionpolicy, "_prejoin4".teamdescription, "_prejoin4".teamowner, "_prejoin4".verbose_bugnotifications, "_prejoin4".visibility, "_prejoin5".bug, "_prejoin5".bugtracker, "_prejoin5".datecreated, "_prejoin5".id, "_prejoin5".last_error_type, "_prejoin5".lastchanged, "_prejoin5".lastchecked, "_prejoin5".next_check, "_prejoin5".owner, "_prejoin5".remote_importance, "_prejoin5".remotebug, "_prejoin5".remotestatus FROM BugTask LEFT JOIN Person AS "_prejoin1" ON BugTask.assignee = "_prejoin1".id LEFT JOIN Product AS "_prejoin2" ON BugTask.product = "_prejoin2".id LEFT JOIN SourcePackageName AS "_prejoin3" ON BugTask.sourcepackagename = "_prejoin3".id LEFT JOIN Person AS "_prejoin4" ON BugTask.owner = "_prejoin4".id LEFT JOIN BugWatch AS "_prejoin5" ON BugTask.bugwatch = "_prejoin5".id WHERE BugTask.bug = 9 AND (1=1) ORDER BY BugTask.id