Merge ~pappacena/launchpad:oci-bug-indexes-backport into launchpad:master

[Thiago F. Pappacena]

Backporting OCI bug support indexes creation from db-devel (already applied in prod)

[Thiago F. Pappacena (pappacena)]

Self-approving already applied db patch (already available in db-devel).

review: Approve

diff --git a/database/schema/patch-2210-22-1.sql b/database/schema/patch-2210-22-1.sql
new file mode 100644
index 0000000..7f4cedd
--- /dev/null
+++ b/database/schema/patch-2210-22-1.sql
@@ -0,0 +1,135 @@
+-- Copyright 2020 Canonical Ltd.  This software is licensed under the
+-- GNU Affero General Public License version 3 (see the file LICENSE).
+
+SET client_min_messages=ERROR;
+
+-- Validate check constraint.
+ALTER TABLE BugTask VALIDATE CONSTRAINT bugtask_assignment_checks;
+
+ALTER TABLE BugSummary VALIDATE CONSTRAINT bugtask_assignment_checks;
+
+-- BugTask indexes.
+CREATE UNIQUE INDEX bugtask__ociproject__bug__key
+    ON BugTask (ociproject, bug)
+    WHERE ociproject IS NOT NULL;
+CREATE UNIQUE INDEX bugtask__ociprojectseries__bug__key
+    ON BugTask (ociprojectseries, bug)
+    WHERE ociprojectseries IS NOT NULL;
+
+-- BugTaskFlat indexes.
+CREATE INDEX bugtaskflat__ociproject__bug__idx
+    ON BugTaskFlat (ociproject, bug)
+    WHERE ociproject IS NOT NULL;
+CREATE INDEX bugtaskflat__ociproject__date_closed__bug__idx
+    ON BugTaskFlat (ociproject, date_closed, bug DESC)
+    WHERE ociproject IS NOT NULL;
+CREATE INDEX bugtaskflat__ociproject__date_last_updated__idx
+    ON BugTaskFlat (ociproject, date_last_updated)
+    WHERE ociproject IS NOT NULL;
+CREATE INDEX bugtaskflat__ociproject__datecreated__idx
+    ON BugTaskFlat (ociproject, datecreated)
+    WHERE ociproject IS NOT NULL;
+CREATE INDEX bugtaskflat__ociproject__heat__bug__idx
+    ON BugTaskFlat (ociproject, heat, bug DESC)
+    WHERE ociproject IS NOT NULL;
+CREATE INDEX bugtaskflat__ociproject__importance__bug__idx
+    ON BugTaskFlat (ociproject, importance, bug DESC)
+    WHERE ociproject IS NOT NULL;
+CREATE INDEX bugtaskflat__ociproject__latest_patch_uploaded__bug__idx
+    ON BugTaskFlat (ociproject, latest_patch_uploaded, bug DESC)
+    WHERE ociproject IS NOT NULL;
+CREATE INDEX bugtaskflat__ociproject__status__bug__idx
+    ON BugTaskFlat (ociproject, status, bug DESC)
+    WHERE ociproject IS NOT NULL;
+
+CREATE INDEX bugtaskflat__ociprojectseries__bug__idx
+    ON BugTaskFlat (ociprojectseries, bug)
+    WHERE ociprojectseries IS NOT NULL;
+CREATE INDEX bugtaskflat__ociprojectseries__date_closed__bug__idx
+    ON BugTaskFlat (ociprojectseries, date_closed, bug DESC)
+    WHERE ociprojectseries IS NOT NULL;
+CREATE INDEX bugtaskflat__ociprojectseries__date_last_updated__idx
+    ON BugTaskFlat (ociprojectseries, date_last_updated)
+    WHERE ociprojectseries IS NOT NULL;
+CREATE INDEX bugtaskflat__ociprojectseries__datecreated__idx
+    ON BugTaskFlat (ociprojectseries, datecreated)
+    WHERE ociprojectseries IS NOT NULL;
+CREATE INDEX bugtaskflat__ociprojectseries__heat__bug__idx
+    ON BugTaskFlat (ociprojectseries, heat, bug DESC)
+    WHERE ociprojectseries IS NOT NULL;
+CREATE INDEX bugtaskflat__ociprojectseries__importance__bug__idx
+    ON BugTaskFlat (ociprojectseries, importance, bug DESC)
+    WHERE ociprojectseries IS NOT NULL;
+CREATE INDEX bugtaskflat__ociprojectseries__latest_patch_uploaded__bug__idx
+    ON BugTaskFlat (ociprojectseries, latest_patch_uploaded, bug DESC)
+    WHERE ociprojectseries IS NOT NULL;
+CREATE INDEX bugtaskflat__ociprojectseries__status__bug__idx
+    ON BugTaskFlat (ociprojectseries, status, bug DESC)
+    WHERE ociprojectseries IS NOT NULL;
+
+
+-- BugSummary indexes.
+CREATE INDEX bugsummary__ociproject__idx
+    ON BugSummary (ociproject)
+    WHERE ociproject IS NOT NULL;
+CREATE INDEX bugsummary__ociprojectseries__idx
+    ON BugSummary (ociprojectseries)
+    WHERE ociprojectseries IS NOT NULL;
+
+
+-- Replacing previously renamed indexes.
+CREATE UNIQUE INDEX bugtask_distinct_sourcepackage_assignment
+    ON BugTask (
+        bug,
+        COALESCE(sourcepackagename, -1),
+        COALESCE(distroseries, -1),
+        COALESCE(distribution, -1)
+    )
+    WHERE
+        product IS NULL
+        AND productseries IS NULL
+        AND ociproject IS NULL
+        AND ociprojectseries IS NULL;
+DROP INDEX old__bugtask_distinct_sourcepackage_assignment;
+
+
+CREATE UNIQUE INDEX bugtask__product__bug__key
+    ON BugTask (product, bug)
+    WHERE
+        product IS NOT NULL
+        AND ociproject IS NULL
+        AND ociprojectseries IS NULL;
+DROP INDEX old__bugtask__product__bug__key;
+
+
+CREATE UNIQUE INDEX bugsummary__unique
+    ON BugSummary (
+        COALESCE(product, -1),
+        COALESCE(productseries, -1),
+        COALESCE(distribution, -1),
+        COALESCE(distroseries, -1),
+        COALESCE(sourcepackagename, -1),
+        COALESCE(ociproject, -1),
+        COALESCE(ociprojectseries, -1),
+        status,
+        importance,
+        has_patch,
+        COALESCE(tag, ''::text),
+        COALESCE(milestone, -1),
+        COALESCE(viewed_by, -1),
+        COALESCE(access_policy, -1)
+    );
+DROP INDEX old__bugsummary__unique;
+
+
+CREATE INDEX bugsummaryjournal__full__idx
+    ON BugSummaryJournal (
+        status, product, productseries, distribution, distroseries,
+        sourcepackagename, ociproject, ociprojectseries, viewed_by, milestone,
+        tag
+    );
+
+DROP INDEX old__bugsummaryjournal__full__idx;
+
+
+INSERT INTO LaunchpadDatabaseRevision VALUES (2210, 22, 1);