Commit 6c22ca44 authored by nick@mysql.com's avatar nick@mysql.com

Added Rand_log_event

parent eba70d6c
...@@ -743,17 +743,31 @@ double Item_func_round::val() ...@@ -743,17 +743,31 @@ double Item_func_round::val()
double Item_func_rand::val() double Item_func_rand::val()
{ {
THD* thd = current_thd;
if (arg_count) if (arg_count)
{ // Only use argument once in query { // Only use argument once in query
uint32 tmp= (uint32) (args[0]->val_int()); uint32 tmp= (uint32) (args[0]->val_int());
randominit(&current_thd->rand,(uint32) (tmp*0x10001L+55555555L), randominit(&thd->rand,(uint32) (tmp*0x10001L+55555555L),
(uint32) (tmp*0x10000001L)); (uint32) (tmp*0x10000001L));
#ifdef DELETE_ITEMS #ifdef DELETE_ITEMS
delete args[0]; delete args[0];
#endif #endif
arg_count=0; arg_count=0;
} }
return rnd(&current_thd->rand); else if (!thd->rand_used)
{
// no need to send a Rand log event if seed was given eg: RAND(seed),
// as it will be replicated in the query as such.
// save the seed only the first time RAND() is used in the query
// once events are forwarded rather than recreated,
// the following can be skipped if inside the slave thread
thd->rand_used=1;
thd->rand_saved_seed1=thd->rand.seed1;
thd->rand_saved_seed2=thd->rand.seed2;
}
return rnd(&thd->rand);
} }
longlong Item_func_sign::val_int() longlong Item_func_sign::val_int()
......
...@@ -1072,6 +1072,13 @@ bool MYSQL_LOG::write(Log_event* event_info) ...@@ -1072,6 +1072,13 @@ bool MYSQL_LOG::write(Log_event* event_info)
if (e.write(file)) if (e.write(file))
goto err; goto err;
} }
if (thd && thd->rand_used)
{
Rand_log_event e(thd,thd->rand_saved_seed1,thd->rand_saved_seed2);
e.set_log_pos(this);
if (e.write(file))
goto err;
}
if (thd && thd->variables.convert_set) if (thd && thd->variables.convert_set)
{ {
char buf[1024] = "SET CHARACTER SET "; char buf[1024] = "SET CHARACTER SET ";
......
...@@ -348,6 +348,18 @@ void Intvar_log_event::pack_info(String* packet) ...@@ -348,6 +348,18 @@ void Intvar_log_event::pack_info(String* packet)
net_store_data(packet, tmp.ptr(), tmp.length()); net_store_data(packet, tmp.ptr(), tmp.length());
} }
void Rand_log_event::pack_info(String* packet)
{
char buf1[256], buf[22];
String tmp(buf1, sizeof(buf1), system_charset_info);
tmp.length(0);
tmp.append("randseed1=");
tmp.append(llstr(seed1, buf));
tmp.append(",randseed2=");
tmp.append(llstr(seed2, buf));
net_store_data(packet, tmp.ptr(), tmp.length());
}
void Slave_log_event::pack_info(String* packet) void Slave_log_event::pack_info(String* packet)
{ {
char buf1[256], buf[22], *end; char buf1[256], buf[22], *end;
...@@ -376,6 +388,9 @@ void Log_event::init_show_field_list(List<Item>* field_list) ...@@ -376,6 +388,9 @@ void Log_event::init_show_field_list(List<Item>* field_list)
field_list->push_back(new Item_empty_string("Info", 20)); field_list->push_back(new Item_empty_string("Info", 20));
} }
/*
* only called by SHOW BINLOG EVENTS
*/
int Log_event::net_send(THD* thd, const char* log_name, my_off_t pos) int Log_event::net_send(THD* thd, const char* log_name, my_off_t pos)
{ {
String* packet = &thd->packet; String* packet = &thd->packet;
...@@ -610,6 +625,9 @@ Log_event* Log_event::read_log_event(const char* buf, int event_len, ...@@ -610,6 +625,9 @@ Log_event* Log_event::read_log_event(const char* buf, int event_len,
case INTVAR_EVENT: case INTVAR_EVENT:
ev = new Intvar_log_event(buf, old_format); ev = new Intvar_log_event(buf, old_format);
break; break;
case RAND_EVENT:
ev = new Rand_log_event(buf, old_format);
break;
default: default:
break; break;
} }
...@@ -915,6 +933,41 @@ void Intvar_log_event::print(FILE* file, bool short_form, char* last_db) ...@@ -915,6 +933,41 @@ void Intvar_log_event::print(FILE* file, bool short_form, char* last_db)
} }
#endif #endif
/*****************************************************************************
*
* Rand log event
*
****************************************************************************/
Rand_log_event::Rand_log_event(const char* buf, bool old_format)
:Log_event(buf, old_format)
{
buf += (old_format) ? OLD_HEADER_LEN : LOG_EVENT_HEADER_LEN;
seed1 = uint8korr(buf+RAND_SEED1_OFFSET);
seed2 = uint8korr(buf+RAND_SEED2_OFFSET);
}
int Rand_log_event::write_data(IO_CACHE* file)
{
char buf[16];
int8store(buf + RAND_SEED1_OFFSET, seed1);
int8store(buf + RAND_SEED2_OFFSET, seed2);
return my_b_safe_write(file, (byte*) buf, sizeof(buf));
}
#ifdef MYSQL_CLIENT
void Rand_log_event::print(FILE* file, bool short_form, char* last_db)
{
char llbuff[22];
if (!short_form)
{
print_header(file);
fprintf(file, "\tRand\n");
}
fprintf(file, "SET RAND SEED1=%s;\n", llstr(seed1, llbuff));
fprintf(file, "SET RAND SEED2=%s;\n", llstr(seed2, llbuff));
fflush(file);
}
#endif
int Load_log_event::write_data_header(IO_CACHE* file) int Load_log_event::write_data_header(IO_CACHE* file)
{ {
...@@ -1926,6 +1979,14 @@ int Intvar_log_event::exec_event(struct st_relay_log_info* rli) ...@@ -1926,6 +1979,14 @@ int Intvar_log_event::exec_event(struct st_relay_log_info* rli)
return 0; return 0;
} }
int Rand_log_event::exec_event(struct st_relay_log_info* rli)
{
thd->rand.seed1 = seed1;
thd->rand.seed2 = seed2;
rli->inc_pending(get_event_len());
return 0;
}
int Slave_log_event::exec_event(struct st_relay_log_info* rli) int Slave_log_event::exec_event(struct st_relay_log_info* rli)
{ {
if (mysql_bin_log.is_open()) if (mysql_bin_log.is_open())
......
...@@ -152,6 +152,11 @@ struct sql_ex_info ...@@ -152,6 +152,11 @@ struct sql_ex_info
#define I_TYPE_OFFSET 0 #define I_TYPE_OFFSET 0
#define I_VAL_OFFSET 1 #define I_VAL_OFFSET 1
/* Rand event post-header */
#define RAND_SEED1_OFFSET 0
#define RAND_SEED2_OFFSET 8
/* Load event post-header */ /* Load event post-header */
#define L_THREAD_ID_OFFSET 0 #define L_THREAD_ID_OFFSET 0
...@@ -199,7 +204,7 @@ enum Log_event_type ...@@ -199,7 +204,7 @@ enum Log_event_type
START_EVENT = 1, QUERY_EVENT =2, STOP_EVENT=3, ROTATE_EVENT = 4, START_EVENT = 1, QUERY_EVENT =2, STOP_EVENT=3, ROTATE_EVENT = 4,
INTVAR_EVENT=5, LOAD_EVENT=6, SLAVE_EVENT=7, CREATE_FILE_EVENT=8, INTVAR_EVENT=5, LOAD_EVENT=6, SLAVE_EVENT=7, CREATE_FILE_EVENT=8,
APPEND_BLOCK_EVENT=9, EXEC_LOAD_EVENT=10, DELETE_FILE_EVENT=11, APPEND_BLOCK_EVENT=9, EXEC_LOAD_EVENT=10, DELETE_FILE_EVENT=11,
NEW_LOAD_EVENT=12 NEW_LOAD_EVENT=12, RAND_EVENT=13
}; };
enum Int_event_type enum Int_event_type
...@@ -497,6 +502,34 @@ class Intvar_log_event: public Log_event ...@@ -497,6 +502,34 @@ class Intvar_log_event: public Log_event
bool is_valid() { return 1; } bool is_valid() { return 1; }
}; };
/*****************************************************************************
*
* Rand log event class
*
****************************************************************************/
class Rand_log_event: public Log_event
{
public:
ulonglong seed1;
ulonglong seed2;
#ifndef MYSQL_CLIENT
Rand_log_event(THD* thd_arg, ulonglong seed1_arg, ulonglong seed2_arg)
:Log_event(thd_arg),seed1(seed1_arg),seed2(seed2_arg)
{}
void pack_info(String* packet);
int exec_event(struct st_relay_log_info* rli);
#else
void print(FILE* file, bool short_form = 0, char* last_db = 0);
#endif
Rand_log_event(const char* buf, bool old_format);
~Rand_log_event() {}
Log_event_type get_type_code() { return RAND_EVENT;}
int get_data_size() { return sizeof(ulonglong) * 2; }
int write_data(IO_CACHE* file);
bool is_valid() { return 1; }
};
class Stop_log_event: public Log_event class Stop_log_event: public Log_event
{ {
......
...@@ -81,7 +81,7 @@ static void free_var(user_var_entry *entry) ...@@ -81,7 +81,7 @@ static void free_var(user_var_entry *entry)
THD::THD():user_time(0), fatal_error(0), THD::THD():user_time(0), fatal_error(0),
last_insert_id_used(0), last_insert_id_used(0),
insert_id_used(0), in_lock_tables(0), insert_id_used(0), rand_used(0), in_lock_tables(0),
global_read_lock(0), bootstrap(0) global_read_lock(0), bootstrap(0)
{ {
host=user=priv_user=db=query=ip=0; host=user=priv_user=db=query=ip=0;
......
...@@ -501,7 +501,8 @@ class THD :public ilink { ...@@ -501,7 +501,8 @@ class THD :public ilink {
bool set_query_id,locked,count_cuted_fields,some_tables_deleted; bool set_query_id,locked,count_cuted_fields,some_tables_deleted;
bool no_errors, allow_sum_func, password; bool no_errors, allow_sum_func, password;
bool fatal_error; bool fatal_error;
bool query_start_used,last_insert_id_used,insert_id_used; bool query_start_used,last_insert_id_used,insert_id_used,rand_used;
ulonglong rand_saved_seed1, rand_saved_seed2;
bool system_thread,in_lock_tables,global_read_lock; bool system_thread,in_lock_tables,global_read_lock;
bool query_error, bootstrap, cleanup_done; bool query_error, bootstrap, cleanup_done;
bool safe_to_cache_query; bool safe_to_cache_query;
......
...@@ -2912,6 +2912,7 @@ mysql_init_query(THD *thd) ...@@ -2912,6 +2912,7 @@ mysql_init_query(THD *thd)
thd->total_warn_count=0; // Warnings for this query thd->total_warn_count=0; // Warnings for this query
thd->last_insert_id_used= thd->query_start_used= thd->insert_id_used=0; thd->last_insert_id_used= thd->query_start_used= thd->insert_id_used=0;
thd->sent_row_count= thd->examined_row_count= 0; thd->sent_row_count= thd->examined_row_count= 0;
thd->rand_used=0;
thd->safe_to_cache_query= 1; thd->safe_to_cache_query= 1;
thd->lex.param_list.empty(); thd->lex.param_list.empty();
DBUG_VOID_RETURN; DBUG_VOID_RETURN;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment