Moved max constraint name lengths to adapters

lib/strong_migrations/adapters/abstract_adapter.rb

@@ -40,6 +40,9 @@ def auto_incrementing_types
         ["primary_key"]
       end
 
+      def max_constraint_name_length
+      end
+
       private
 
       def connection

lib/strong_migrations/adapters/mysql_adapter.rb

@@ -92,6 +92,10 @@ def rewrite_blocks
         "writes"
       end
 
+      def max_constraint_name_length
+        64
+      end
+
       private
 
       # do not memoize

lib/strong_migrations/adapters/postgresql_adapter.rb

@@ -173,6 +173,10 @@ def auto_incrementing_types
         ["primary_key", "serial", "bigserial"]
       end
 
+      def max_constraint_name_length
+        63
+      end
+
       private
 
       def set_timeout(setting, timeout)

lib/strong_migrations/checks.rb

@@ -236,8 +236,7 @@ def check_change_column_null(*args)
 
             # match https://github.com/nullobject/rein
             constraint_name = "#{table}_#{column}_null"
-            # 63 characters is max length for Postgres, 64 characters for MySQL and MariaDB
-            if constraint_name.bytesize > 63
+            if adapter.max_constraint_name_length && constraint_name.bytesize > adapter.max_constraint_name_length
               constraint_name = connection.check_constraint_options(table, expression, {})[:name]
 
               # avoid collision with Active Record naming for safe_by_default