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| author | Ashish Agarwal <ashish.y.agarwal@oracle.com> | 2013-05-19 23:38:06 +0530 |
|---|---|---|
| committer | Ashish Agarwal <ashish.y.agarwal@oracle.com> | 2013-05-19 23:38:06 +0530 |
| commit | 0c4f4ff015f7c4a06b9d4c9e8f22f44a57e2a318 (patch) | |
| tree | 24753afbd8c14c24de460f691e8e4a67e50a32c8 /sql/sys_vars.h | |
| parent | 5ca36b3b46de00e9eb8030c0551e7e97bc8e24eb (diff) | |
| download | mariadb-git-0c4f4ff015f7c4a06b9d4c9e8f22f44a57e2a318.tar.gz | |
Bug#16194302: SUPPORT FOR FLOATING-POINT SYSTEM VARIABLES
USING THE PLUGIN INTERFACE.
ISSUE: No support for floating-point plugin
system variables.
SOLUTION: Allowing plugins to define and expose floating-point
system variables of type double. MYSQL_SYSVAR_DOUBLE
and MYSQL_THDVAR_DOUBLE are added.
ISSUE: Fractional part of the def, min, max values of system
variables are ignored.
SOLUTION: Adding functions that are used to store the raw
representation of a double in the raw bits of unsigned
longlong in a way that the binary representation
remains the same.
Diffstat (limited to 'sql/sys_vars.h')
| -rw-r--r-- | sql/sys_vars.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/sql/sys_vars.h b/sql/sys_vars.h index ca6e7d40b0e..443e843bdde 100644 --- a/sql/sys_vars.h +++ b/sql/sys_vars.h @@ -729,13 +729,14 @@ public: const char *substitute=0, int parse_flag= PARSE_NORMAL) : sys_var(&all_sys_vars, name_arg, comment, flag_args, off, getopt.id, - getopt.arg_type, SHOW_DOUBLE, (longlong) double2ulonglong(def_val), + getopt.arg_type, SHOW_DOUBLE, + (longlong) getopt_double2ulonglong(def_val), lock, binlog_status_arg, on_check_func, on_update_func, substitute, parse_flag) { option.var_type= GET_DOUBLE; - option.min_value= (longlong) double2ulonglong(min_val); - option.max_value= (longlong) double2ulonglong(max_val); + option.min_value= (longlong) getopt_double2ulonglong(min_val); + option.max_value= (longlong) getopt_double2ulonglong(max_val); global_var(double)= (double)option.def_value; DBUG_ASSERT(min_val < max_val); DBUG_ASSERT(min_val <= def_val); @@ -767,7 +768,7 @@ public: void session_save_default(THD *thd, set_var *var) { var->save_result.double_value= global_var(double); } void global_save_default(THD *thd, set_var *var) - { var->save_result.double_value= (double)option.def_value; } + { var->save_result.double_value= getopt_ulonglong2double(option.def_value); } }; /** |