[ARVADOS] updated: 893b9849ee1f3d407778a666702dfa300e0cebbc

[Git user]

Summary of changes:
 ...20170906224040_materialized_permission_view.rb} | 41 ++++++++++++----------
 1 file changed, 23 insertions(+), 18 deletions(-)
 copy services/api/{lib/create_permission_view.sql => db/migrate/20170906224040_materialized_permission_view.rb} (63%)

       via  893b9849ee1f3d407778a666702dfa300e0cebbc (commit)
      from  034a8c0c581e5c2a72dab66f8cdffea781b014f6 (commit)

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commit 893b9849ee1f3d407778a666702dfa300e0cebbc
Author: Peter Amstutz <peter.amstutz at curoverse.com>
Date:   Wed Sep 6 23:41:34 2017 -0400

    12032: Added migration for materialized view
    
    Arvados-DCO-1.1-Signed-off-by: Peter Amstutz <pamstutz at veritasgenetics.com>

diff --git a/services/api/db/migrate/20170906224040_materialized_permission_view.rb b/services/api/db/migrate/20170906224040_materialized_permission_view.rb
new file mode 100644
index 0000000..de0814e
--- /dev/null
+++ b/services/api/db/migrate/20170906224040_materialized_permission_view.rb
@@ -0,0 +1,74 @@
+class MaterializedPermissionView < ActiveRecord::Migration
+
+  @@idxtables = [:collections, :container_requests, :groups, :jobs, :links, :pipeline_instances, :pipeline_templates, :repositories, :users, :virtual_machines, :workflows]
+
+  def up
+    ActiveRecord::Base.connection.execute(
+    "CREATE MATERIALIZED VIEW permission_view AS
+WITH RECURSIVE
+perm_value (name, val) AS (
+     VALUES
+     ('can_read',   1::smallint),
+     ('can_login',  1),
+     ('can_write',  2),
+     ('can_manage', 3)
+     ),
+perm_edges (tail_uuid, head_uuid, val, follow, trashed) AS (
+       SELECT links.tail_uuid,
+              links.head_uuid,
+              pv.val,
+              (pv.val = 3 OR groups.uuid IS NOT NULL) AS follow,
+              0::smallint AS trashed
+              FROM links
+              LEFT JOIN perm_value pv ON pv.name = links.name
+              LEFT JOIN groups ON pv.val<3 AND groups.uuid = links.head_uuid
+              WHERE links.link_class = 'permission'
+       UNION ALL
+       SELECT owner_uuid, uuid, 3, true,
+              CASE WHEN trash_at IS NOT NULL and trash_at < clock_timestamp() THEN 1 ELSE 0 END
+              FROM groups
+       ),
+perm (val, follow, user_uuid, target_uuid, trashed, startnode) AS (
+     SELECT 3::smallint             AS val,
+            false                   AS follow,
+            users.uuid::varchar(32) AS user_uuid,
+            users.uuid::varchar(32) AS target_uuid,
+            0::smallint             AS trashed,
+            true                    AS startnode
+            FROM users
+     UNION
+     SELECT LEAST(perm.val, edges.val)::smallint  AS val,
+            edges.follow                          AS follow,
+            perm.user_uuid::varchar(32)           AS user_uuid,
+            edges.head_uuid::varchar(32)          AS target_uuid,
+            GREATEST(perm.trashed, edges.trashed)::smallint AS trashed,
+            false                                 AS startnode
+            FROM perm
+            INNER JOIN perm_edges edges
+            ON (perm.startnode or perm.follow) AND edges.tail_uuid = perm.target_uuid
+)
+SELECT user_uuid,
+       target_uuid,
+       MAX(val) AS perm_level,
+       CASE follow WHEN true THEN target_uuid ELSE NULL END AS target_owner_uuid,
+       MAX(trashed) AS trashed
+       FROM perm
+       GROUP BY user_uuid, target_uuid, target_owner_uuid;
+")
+    add_index :permission_view, [:trashed, :target_uuid], name: 'permission_target_trashed'
+    add_index :permission_view, [:user_uuid, :trashed, :perm_level], name: 'permission_target_user_trashed_level'
+
+    @@idxtables.each do |table|
+      ActiveRecord::Base.connection.execute("CREATE INDEX index_#{table.to_s}_on_modified_at_uuid ON #{table.to_s} USING btree (modified_at desc, uuid asc)")
+    end
+  end
+
+  def down
+    remove_index :permission_view, name: 'permission_target_trashed'
+    remove_index :permission_view, name: 'permission_target_user_trashed_level'
+    @@idxtables.each do |table|
+      ActiveRecord::Base.connection.execute("DROP INDEX index_#{table.to_s}_on_modified_at_uuid")
+    end
+    ActiveRecord::Base.connection.execute("DROP MATERIALIZED VIEW IF EXISTS permission_view")
+  end
+end

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hooks/post-receive
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