validate_index_length!

# File activerecord/lib/active_record/connection_adapters/abstract/schema_statements.rb, line 1876
        def validate_index_length!(table_name, new_name, internal = false)
          if new_name.length > index_name_length
            raise ArgumentError, <<~MSG.squish
              Index name '#{new_name}' on table '#{table_name}' is too long (#{new_name.length} characters); the limit
              is #{index_name_length} characters
            MSG
          end
        end