exec_delete

# File activerecord/lib/active_record/connection_adapters/postgresql/database_statements.rb, line 153
        def exec_delete(sql, name = 'SQL', binds = [])
          result = without_prepared_statement?(binds) ? exec_no_cache(sql, name, binds) :
                                                        exec_cache(sql, name, binds)
          affected = result.cmd_tuples
          result.clear
          affected
        end