Archive:+packages with empty name search does like '%%' search.

https://lp-oops.canonical.com/oops.py/?oopsid=1707ED2083

This appears to be a sub or parallel issue of the bug in +packages reported in bug 607934.

https://launchpad.net/~chromium-daily/+archive/ppa/+packages?field.name_filter=&field.status_filter=&field.series_filter=

SQL time: 8589 ms
Non-sql time: 5045 ms
Total time: 13634 ms
Statement Count: 175

1 3363.0 1 launchpad-main-slave SELECT SourcePackagePublishingHistory.archive, SourcePackagePublishingHistory.component, SourcePackagePublishingHistory.datecreated, SourcePackagePublishingHistory.datemadepending, SourcePackagePublishingHistory.datepublished, SourcePackagePublishingHistory.dateremoved, SourcePackagePublishingHistory.datesuperseded, SourcePackagePublishingHistory.distroseries, SourcePackagePublishingHistory.id, SourcePackagePublishingHistory.pocket, SourcePackagePublishingHistory.removal_comment, SourcePackagePublishingHistory.removed_by, SourcePackagePublishingHistory.scheduleddeletiondate, SourcePackagePublishingHistory.section, SourcePackagePublishingHistory.sourcepackagerelease, SourcePackagePublishingHistory.status, SourcePackagePublishingHistory.supersededby, "_prejoin1".architecturehintlist, "_prejoin1".build_conflicts, "_prejoin1".build_conflicts_indep, "_prejoin1".builddepends, "_prejoin1".builddependsindep, "_prejoin1".changelog, "_prejoin1".changelog_entry, "_prejoin1".component, "_prejoin1".copyright, "_prejoin1".creator, "_prejoin1".dateuploaded, "_prejoin1".dsc, "_prejoin1".dsc_binaries, "_prejoin1".dsc_format, "_prejoin1".dsc_maintainer_rfc822, "_prejoin1".dsc_standards_version, "_prejoin1".dscsigningkey, "_prejoin1".format, "_prejoin1".id, "_prejoin1".maintainer, "_prejoin1".section, "_prejoin1".sourcepackage_recipe_build, "_prejoin1".sourcepackagename, "_prejoin1".upload_archive, "_prejoin1".upload_distroseries, "_prejoin1".urgency, "_prejoin1".version, "_prejoin2".account, "_prejoin2".creation_comment, "_prejoin2".creation_rationale, "_prejoin2".datecreated, "_prejoin2".defaultmembershipperiod, "_prejoin2".defaultrenewalperiod, "_prejoin2".displayname, "_prejoin2".hide_email_addresses, "_prejoin2".homepage_content, "_prejoin2".icon, "_prejoin2".id, "_prejoin2".logo, "_prejoin2".mailing_list_auto_subscribe_policy, "_prejoin2".merged, "_prejoin2".mugshot, "_prejoin2".name, "_prejoin2".personal_standing, "_prejoin2".personal_standing_reason, "_prejoin2".registrant, "_prejoin2".renewal_policy, "_prejoin2".subscriptionpolicy, "_prejoin2".teamdescription, "_prejoin2".teamowner, "_prejoin2".verbose_bugnotifications, "_prejoin2".visibility, "_prejoin3".active, "_prejoin3".algorithm, "_prejoin3".can_encrypt, "_prejoin3".fingerprint, "_prejoin3".id, "_prejoin3".keyid, "_prejoin3".keysize, "_prejoin3".owner, "_prejoin4".binarycount, "_prejoin4".changeslist, "_prejoin4".date_created, "_prejoin4".datereleased, "_prejoin4".defer_translation_imports, "_prejoin4".description, "_prejoin4".displayname, "_prejoin4".distribution, "_prejoin4".driver, "_prejoin4".hide_all_translations, "_prejoin4".id, "_prejoin4".language_pack_base, "_prejoin4".language_pack_delta, "_prejoin4".language_pack_full_export_requested, "_prejoin4".language_pack_proposed, "_prejoin4".lucilleconfig, "_prejoin4".messagecount, "_prejoin4".name, "_prejoin4".nominatedarchindep, "_prejoin4".owner, "_prejoin4".parent_series, "_prejoin4".sourcecount, "_prejoin4".releasestatus, "_prejoin4".summary, "_prejoin4".title, "_prejoin4".version, "_prejoin5".id, "_prejoin5".name FROM SourcePackageName, SourcePackageRelease, SourcePackagePublishingHistory LEFT JOIN SourcePackageRelease AS "_prejoin1" ON SourcePackagePublishingHistory.sourcepackagerelease = "_prejoin1".id LEFT JOIN Person AS "_prejoin2" ON "_prejoin1".creator = "_prejoin2".id LEFT JOIN GPGKey AS "_prejoin3" ON "_prejoin1".dscsigningkey = "_prejoin3".id LEFT JOIN DistroSeries AS "_prejoin4" ON SourcePackagePublishingHistory.distroseries = "_prejoin4".id LEFT JOIN Section AS "_prejoin5" ON SourcePackagePublishingHistory.section = "_prejoin5".id WHERE SourcePackagePublishingHistory.archive = 7087 AND SourcePackagePublishingHistory.sourcepackagerelease = SourcePackageRelease.id AND SourcePackageRelease.sourcepackagename = SourcePackageName.id AND SourcePackageName.name LIKE '%' || '' || '%' AND (1=1) ORDER BY SourcePackageName.name, debversion_sort_key(SourcePackageRelease.version) DESC, SourcePackagePublishingHistory.id DESC LIMIT 51 OFFSET 0

Note the SourcePackageName.name LIKE '%' || '' || '%' condition: postgresql does not optimise this out to (is not null) in 8.3, it may in newer ones. I tested this against bugs -

lpmain_staging=> select count(*) from bug where bug.description like '%' || '' || '%' ;
Cancel request sent
ERROR: canceling statement due to user request

 (I gave it a good 10 seconds)
lpmain_staging=> select count(*) from bug ;
 count
--------
 611067
(1 row)

Time: 1487.432 ms

lpmain_staging=> select count(*) from bug where bug.description like '%' || '' || '%' ;
Cancel request sent
ERROR: canceling statement due to user request
still slow.