Cache table_exists?('application_settings') to reduce repeated schema reloads

Closes #43355

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/gitlab/database.rb b/lib/gitlab/database.rb
index d4fc69cb173..76501dd50e8 100644
--- a/lib/gitlab/database.rb
+++ b/lib/gitlab/database.rb
@@ -187,6 +187,11 @@ module Gitlab
       connection.schema_cache.columns_hash(table_name).has_key?(column_name.to_s)
     end
 
+    def self.cached_table_exists?(table_name)
+      # Rails 5 uses data_source_exists? instead of table_exists?
+      connection.schema_cache.table_exists?(table_name)
+    end
+
     private_class_method :connection
 
     def self.database_version