1 files changed, 32 insertions, 0 deletions
diff --git a/gems/gitlab-schema-validation/lib/gitlab/schema/validation/validators/missing_table_columns.rb b/gems/gitlab-schema-validation/lib/gitlab/schema/validation/validators/missing_table_columns.rb
new file mode 100644
index 00000000000..8b441e19654
--- /dev/null
+++ b/gems/gitlab-schema-validation/lib/gitlab/schema/validation/validators/missing_table_columns.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Schema
+    module Validation
+      module Validators
+        class MissingTableColumns < Base
+          ERROR_MESSAGE = "The table %s has columns missing from the database"
+
+          def execute
+            structure_sql.tables.filter_map do |structure_sql_table|
+              table_name = structure_sql_table.name
+              database_table = database.fetch_table_by_name(table_name)
+
+              next unless database_table
+
+              inconsistencies = structure_sql_table.columns.filter_map do |structure_table_column|
+                next if database_table.column_exists?(structure_table_column.name)
+
+                structure_table_column
+              end
+
+              if inconsistencies.any?
+                build_inconsistency(self.class, nil, SchemaObjects::Table.new(table_name, inconsistencies))
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end