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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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16
sql/sql_class.h
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@ -343,7 +343,6 @@ typedef struct system_status_var
#define last_system_status_var com_stmt_close
#ifdef MYSQL_SERVER
void free_tmp_table(THD *thd, TABLE *entry);
@ -833,6 +832,7 @@ public:
struct rand_struct rand; // used for authentication
struct system_variables variables; // Changeable local variables
struct system_status_var status_var; // Per thread statistic vars
struct system_status_var *initial_status_var; /* used by show status */
THR_LOCK_INFO lock_info; // Locking info of this thread
THR_LOCK_OWNER main_lock_id; // To use for conventional queries
THR_LOCK_OWNER *lock_id; // If not main_lock_id, points to
@ -1306,6 +1306,10 @@ public:
{
return !stmt_arena->is_stmt_prepare() && !lex->only_view_structure();
}
inline bool fill_information_schema_tables()
{
return !stmt_arena->is_stmt_prepare();
}
inline gptr trans_alloc(unsigned int size)
{
return alloc_root(&transaction.mem_root,size);
@ -1952,8 +1956,16 @@ public:
void cleanup();
};
/* Bits in sql_command_flags */
#define CF_CHANGES_DATA 1
#define CF_HAS_ROW_COUNT 2
#define CF_STATUS_COMMAND 4
#define CF_SHOW_TABLE_COMMAND 8
/* Functions in sql_class.cc */
void add_to_status(STATUS_VAR *to_var, STATUS_VAR *from_var);
void add_diff_to_status(STATUS_VAR *to_var, STATUS_VAR *from_var,
STATUS_VAR *dec_var);
#endif /* MYSQL_SERVER */