5 files changed, 10 insertions, 0 deletions
diff --git a/lib/gitlab/sql/cte.rb b/lib/gitlab/sql/cte.rb
index f357829ba3f..7817a2a1ce2 100644
--- a/lib/gitlab/sql/cte.rb
+++ b/lib/gitlab/sql/cte.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module SQL
     # Class for easily building CTE statements.
diff --git a/lib/gitlab/sql/glob.rb b/lib/gitlab/sql/glob.rb
index 5e89e12b2b1..f3421bd95d2 100644
--- a/lib/gitlab/sql/glob.rb
+++ b/lib/gitlab/sql/glob.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module SQL
     module Glob
diff --git a/lib/gitlab/sql/pattern.rb b/lib/gitlab/sql/pattern.rb
index 53744bad1f4..92388262035 100644
--- a/lib/gitlab/sql/pattern.rb
+++ b/lib/gitlab/sql/pattern.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module SQL
     module Pattern
diff --git a/lib/gitlab/sql/recursive_cte.rb b/lib/gitlab/sql/recursive_cte.rb
index 16ec002f139..ec1f00a3a91 100644
--- a/lib/gitlab/sql/recursive_cte.rb
+++ b/lib/gitlab/sql/recursive_cte.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module SQL
     # Class for easily building recursive CTE statements.
diff --git a/lib/gitlab/sql/union.rb b/lib/gitlab/sql/union.rb
index c99b262f1ca..d24d5116167 100644
--- a/lib/gitlab/sql/union.rb
+++ b/lib/gitlab/sql/union.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Gitlab
   module SQL
     # Class for building SQL UNION statements.