Merge branch 'partial-index-for-merge_request_id' into 'master'

Use partial index on `merge_request_id`

Closes #54913

See merge request gitlab-org/gitlab-ce!23609

1 files changed, 2 insertions, 2 deletions

diff --git a/db/migrate/20181120091639_add_foreign_key_to_ci_pipelines_merge_requests.rb b/db/migrate/20181120091639_add_foreign_key_to_ci_pipelines_merge_requests.rb
index c2b5b239279..03f677a4678 100644
--- a/db/migrate/20181120091639_add_foreign_key_to_ci_pipelines_merge_requests.rb
+++ b/db/migrate/20181120091639_add_foreign_key_to_ci_pipelines_merge_requests.rb
@@ -8,7 +8,7 @@ class AddForeignKeyToCiPipelinesMergeRequests < ActiveRecord::Migration
   disable_ddl_transaction!
 
   def up
-    add_concurrent_index :ci_pipelines, :merge_request_id
+    add_concurrent_index :ci_pipelines, :merge_request_id, where: 'merge_request_id IS NOT NULL'
     add_concurrent_foreign_key :ci_pipelines, :merge_requests, column: :merge_request_id, on_delete: :cascade
   end
 
@@ -17,6 +17,6 @@ class AddForeignKeyToCiPipelinesMergeRequests < ActiveRecord::Migration
       remove_foreign_key :ci_pipelines, :merge_requests
     end
 
-    remove_concurrent_index :ci_pipelines, :merge_request_id
+    remove_concurrent_index :ci_pipelines, :merge_request_id, where: 'merge_request_id IS NOT NULL'
   end
 end