diff options
Diffstat (limited to 'sql/sys_vars.cc')
| -rw-r--r-- | sql/sys_vars.cc | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/sql/sys_vars.cc b/sql/sys_vars.cc index c1c6e142706..76486dcca71 100644 --- a/sql/sys_vars.cc +++ b/sql/sys_vars.cc @@ -3823,9 +3823,67 @@ static Sys_var_ulong Sys_debug_binlog_fsync_sleep( CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)); #endif + static Sys_var_harows Sys_expensive_subquery_limit( "expensive_subquery_limit", "The maximum number of rows a subquery may examine in order to be " "executed during optimization and used for constant optimization", SESSION_VAR(expensive_subquery_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, HA_POS_ERROR), DEFAULT(100), BLOCK_SIZE(1)); + +static bool check_pseudo_slave_mode(sys_var *self, THD *thd, set_var *var) +{ + longlong previous_val= thd->variables.pseudo_slave_mode; + longlong val= (longlong) var->save_result.ulonglong_value; + bool rli_fake= false; + +#ifndef EMBEDDED_LIBRARY + rli_fake= thd->rli_fake ? true : false; +#endif + + if (rli_fake) + { + if (!val) + { +#ifndef EMBEDDED_LIBRARY + delete thd->rli_fake; + thd->rli_fake= NULL; +#endif + } + else if (previous_val && val) + goto ineffective; + else if (!previous_val && val) + push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, + ER_WRONG_VALUE_FOR_VAR, + "'pseudo_slave_mode' is already ON."); + } + else + { + if (!previous_val && !val) + goto ineffective; + else if (previous_val && !val) + push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, + ER_WRONG_VALUE_FOR_VAR, + "Slave applier execution mode not active, " + "statement ineffective."); + } + goto end; + +ineffective: + push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, + ER_WRONG_VALUE_FOR_VAR, + "'pseudo_slave_mode' change was ineffective."); + +end: + return FALSE; +} +static Sys_var_mybool Sys_pseudo_slave_mode( + "pseudo_slave_mode", + "SET pseudo_slave_mode= 0,1 are commands that mysqlbinlog " + "adds to beginning and end of binary log dumps. While zero " + "value indeed disables, the actual enabling of the slave " + "applier execution mode is done implicitly when a " + "Format_description_event is sent through the session.", + SESSION_ONLY(pseudo_slave_mode), NO_CMD_LINE, DEFAULT(FALSE), + NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_pseudo_slave_mode)); + |