Merge branch '20990-name-btree' refs #20990

[arvados.git] / services / api / db / migrate / 20230922000000_add_btree_name_index_to_collections_and_groups.rb

diff --git a/services/api/db/migrate/20230922000000_add_btree_name_index_to_collections_and_groups.rb b/services/api/db/migrate/20230922000000_add_btree_name_index_to_collections_and_groups.rb
new file mode 100644 (file)
index 0000000..7e6e725
--- /dev/null
+++ b/services/api/db/migrate/20230922000000_add_btree_name_index_to_collections_and_groups.rb
@@ -0,0 +1,24 @@
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: AGPL-3.0
+
+class AddBtreeNameIndexToCollectionsAndGroups < ActiveRecord::Migration[5.2]
+  #
+  # We previously added 'index_groups_on_name' and
+  # 'index_collections_on_name' but those are 'gin_trgm_ops' which is
+  # used with 'ilike' searches but despite documentation suggesting
+  # they would be, experience has shown these indexes don't get used
+  # for '=' (and/or they are much slower than the btree for exact
+  # matches).
+  #
+  # So we want to add a regular btree index.
+  #
+  def up
+    ActiveRecord::Base.connection.execute 'CREATE INDEX index_groups_on_name_btree on groups USING btree (name)'
+    ActiveRecord::Base.connection.execute 'CREATE INDEX index_collections_on_name_btree on collections USING btree (name)'
+  end
+  def down
+    ActiveRecord::Base.connection.execute 'DROP INDEX IF EXISTS index_collections_on_name_btree'
+    ActiveRecord::Base.connection.execute 'DROP INDEX IF EXISTS index_groups_on_name_btree'
+  end
+end