diff options
Diffstat (limited to 'sql/sys_vars.cc')
| -rw-r--r-- | sql/sys_vars.cc | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc index e04b7be616f..73d01f5341d 100644 --- a/sql/sys_vars.cc +++ b/sql/sys_vars.cc @@ -300,6 +300,48 @@ static Sys_var_enum Sys_binlog_format( NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(binlog_format_check), ON_UPDATE(fix_binlog_format_after_update)); +static bool binlog_direct_check(sys_var *self, THD *thd, set_var *var) +{ + /* + Makes the session variable 'binlog_direct_non_transactional_updates' + read-only inside a transaction. + */ + if (thd->active_transaction() && (var->type == OPT_SESSION)) + { + my_error(ER_INSIDE_TRANSACTION_PREVENTS_SWITCH_BINLOG_DIRECT, MYF(0)); + return 1; + } + /* + Makes the session variable 'binlog_direct_non_transactional_updates' + read-only if within a procedure, trigger or function. + */ + if (thd->in_sub_stmt) + { + my_error(ER_STORED_FUNCTION_PREVENTS_SWITCH_BINLOG_DIRECT, MYF(0)); + return 1; + } + + if (check_has_super(self, thd, var)) + return true; + if (var->type == OPT_GLOBAL || + (thd->variables.binlog_direct_non_trans_update == + var->save_result.ulonglong_value)) + return false; + + return false; +} + +static Sys_var_mybool Sys_binlog_direct( + "binlog_direct_non_transactional_updates", + "Causes updates to non-transactional engines using statement format to " + "be written directly to binary log. Before using this option make sure " + "that there are no dependencies between transactional and " + "non-transactional tables such as in the statement INSERT INTO t_myisam " + "SELECT * FROM t_innodb; otherwise, slaves may diverge from the master.", + SESSION_VAR(binlog_direct_non_trans_update), + CMD_LINE(OPT_ARG), DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(binlog_direct_check)); + static Sys_var_ulong Sys_bulk_insert_buff_size( "bulk_insert_buffer_size", "Size of tree cache used in bulk " "insert optimisation. Note that this is a limit per thread!", |