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SHOW STATUS does not anymore change local status variables (except com_show_status). Global status variables are still updated.

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SHOW STATUS are not anymore put in slow query log because of no index usage.

Implemntation done by removing orig_sql_command and moving logic of SHOW STATUS to mysql_excute_command()
This simplifies code and allows us to remove some if statements all over the code.

Upgraded uc_update_queries[] to sql_command_flags and added more bitmaps to better categorize commands.
This allowed some overall simplifaction when testing sql_command.

Fixes bugs:
Bug#10210: running SHOW STATUS increments counters it shouldn't
Bug#19764: SHOW commands end up in the slow log as table scans
This commit is contained in:
monty@mysql.com
2006-06-20 13:20:32 +03:00
parent 49a3334889
commit be269e56d2
21 changed files with 405 additions and 219 deletions
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25
sql/sql_class.cc
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@ -516,6 +516,31 @@ void add_to_status(STATUS_VAR *to_var, STATUS_VAR *from_var)
/* it doesn't make sense to add last_query_cost values */
}
/*
Add the difference between two status variable arrays to another one.
SYNOPSIS
add_diff_to_status
to_var add to this array
from_var from this array
dec_var minus this array
NOTE
This function assumes that all variables are long/ulong.
*/
void add_diff_to_status(STATUS_VAR *to_var, STATUS_VAR *from_var,
STATUS_VAR *dec_var)
{
ulong *end= (ulong*) ((byte*) to_var + offsetof(STATUS_VAR,
last_system_status_var) +
sizeof(ulong));
ulong *to= (ulong*) to_var, *from= (ulong*) from_var, *dec= (ulong*) dec_var;
while (to != end)
*(to++)+= *(from++) - *(dec++);
}
void THD::awake(THD::killed_state state_to_set)
{