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manually merged

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This commit is contained in:
serg@serg.mylan
2005-02-14 21:50:09 +01:00
parent 2b49bea59a db13afd89d
commit fd828e5b4d
84 changed files with 4343 additions and 3270 deletions
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297
sql/log_event.cc
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@@ -269,9 +269,10 @@ const char* Log_event::get_type_str()
case DELETE_FILE_EVENT: return "Delete_file";
case EXEC_LOAD_EVENT: return "Exec_load";
case RAND_EVENT: return "RAND";
case XID_EVENT: return "Xid";
case USER_VAR_EVENT: return "User var";
case FORMAT_DESCRIPTION_EVENT: return "Format_desc";
default: return "Unknown"; /* impossible */
default: return "Unknown"; /* impossible */
}
}
@@ -286,16 +287,15 @@ Log_event::Log_event(THD* thd_arg, uint16 flags_arg, bool using_trans)
{
server_id= thd->server_id;
when= thd->start_time;
cache_stmt= (using_trans &&
(thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN)));
cache_stmt= using_trans;
}
/*
This minimal constructor is for when you are not even sure that there is a
valid THD. For example in the server when we are shutting down or flushing
logs after receiving a SIGHUP (then we must write a Rotate to the binlog but
we have no THD, so we need this minimal constructor).
This minimal constructor is for when you are not even sure that there
is a valid THD. For example in the server when we are shutting down or
flushing logs after receiving a SIGHUP (then we must write a Rotate to
the binlog but we have no THD, so we need this minimal constructor).
*/
Log_event::Log_event()
@@ -314,12 +314,12 @@ Log_event::Log_event()
*/
Log_event::Log_event(const char* buf,
const Format_description_log_event* description_event)
const Format_description_log_event* description_event)
:temp_buf(0), cache_stmt(0)
{
#ifndef MYSQL_CLIENT
thd = 0;
#endif
#endif
when = uint4korr(buf);
server_id = uint4korr(buf + SERVER_ID_OFFSET);
if (description_event->binlog_version==1)
@@ -331,14 +331,14 @@ Log_event::Log_event(const char* buf,
/* 4.0 or newer */
log_pos= uint4korr(buf + LOG_POS_OFFSET);
/*
If the log is 4.0 (so here it can only be a 4.0 relay log read by the SQL
thread or a 4.0 master binlog read by the I/O thread), log_pos is the
beginning of the event: we transform it into the end of the event, which is
more useful.
But how do you know that the log is 4.0: you know it if description_event
is version 3 *and* you are not reading a Format_desc (remember that
mysqlbinlog starts by assuming that 5.0 logs are in 4.0 format, until it
finds a Format_desc).
If the log is 4.0 (so here it can only be a 4.0 relay log read by
the SQL thread or a 4.0 master binlog read by the I/O thread),
log_pos is the beginning of the event: we transform it into the end
of the event, which is more useful.
But how do you know that the log is 4.0: you know it if
description_event is version 3 *and* you are not reading a
Format_desc (remember that mysqlbinlog starts by assuming that 5.0
logs are in 4.0 format, until it finds a Format_desc).
*/
if (description_event->binlog_version==3 &&
buf[EVENT_TYPE_OFFSET]<FORMAT_DESCRIPTION_EVENT && log_pos)
@@ -346,13 +346,13 @@ Log_event::Log_event(const char* buf,
/*
If log_pos=0, don't change it. log_pos==0 is a marker to mean
"don't change rli->group_master_log_pos" (see
inc_group_relay_log_pos()). As it is unreal log_pos, adding the event
len's is nonsense. For example, a fake Rotate event should
inc_group_relay_log_pos()). As it is unreal log_pos, adding the
event len's is nonsense. For example, a fake Rotate event should
not have its log_pos (which is 0) changed or it will modify
Exec_master_log_pos in SHOW SLAVE STATUS, displaying a nonsense value
of (a non-zero offset which does not exist in the master's binlog, so
which will cause problems if the user uses this value in
CHANGE MASTER).
Exec_master_log_pos in SHOW SLAVE STATUS, displaying a nonsense
value of (a non-zero offset which does not exist in the master's
binlog, so which will cause problems if the user uses this value
in CHANGE MASTER).
*/
log_pos+= uint4korr(buf + EVENT_LEN_OFFSET);
}
@@ -363,16 +363,17 @@ Log_event::Log_event(const char* buf,
(buf[EVENT_TYPE_OFFSET] == ROTATE_EVENT))
{
/*
These events always have a header which stops here (i.e. their header is
FROZEN).
These events always have a header which stops here (i.e. their
header is FROZEN).
*/
/*
Initialization to zero of all other Log_event members as they're not
specified. Currently there are no such members; in the future there will
be an event UID (but Format_description and Rotate don't need this UID,
as they are not propagated through --log-slave-updates (remember the UID
is used to not play a query twice when you have two masters which are
slaves of a 3rd master). Then we are done.
Initialization to zero of all other Log_event members as they're
not specified. Currently there are no such members; in the future
there will be an event UID (but Format_description and Rotate
don't need this UID, as they are not propagated through
--log-slave-updates (remember the UID is used to not play a query
twice when you have two masters which are slaves of a 3rd master).
Then we are done.
*/
return;
}
@@ -405,10 +406,10 @@ int Log_event::exec_event(struct st_relay_log_info* rli)
if (rli)
{
/*
If in a transaction, and if the slave supports transactions,
just inc_event_relay_log_pos(). We only have to check for OPTION_BEGIN
(not OPTION_NOT_AUTOCOMMIT) as transactions are logged
with BEGIN/COMMIT, not with SET AUTOCOMMIT= .
If in a transaction, and if the slave supports transactions, just
inc_event_relay_log_pos(). We only have to check for OPTION_BEGIN
(not OPTION_NOT_AUTOCOMMIT) as transactions are logged with
BEGIN/COMMIT, not with SET AUTOCOMMIT= .
CAUTION: opt_using_transactions means
innodb || bdb ; suppose the master supports InnoDB and BDB,
@@ -416,17 +417,18 @@ int Log_event::exec_event(struct st_relay_log_info* rli)
will arise:
- suppose an InnoDB table is created on the master,
- then it will be MyISAM on the slave
- but as opt_using_transactions is true, the slave will believe he is
transactional with the MyISAM table. And problems will come when one
does START SLAVE; STOP SLAVE; START SLAVE; (the slave will resume at
BEGIN whereas there has not been any rollback). This is the problem of
using opt_using_transactions instead of a finer
"does the slave support _the_transactional_handler_used_on_the_master_".
More generally, we'll have problems when a query mixes a transactional
handler and MyISAM and STOP SLAVE is issued in the middle of the
"transaction". START SLAVE will resume at BEGIN while the MyISAM table
has already been updated.
- but as opt_using_transactions is true, the slave will believe he
is transactional with the MyISAM table. And problems will come
when one does START SLAVE; STOP SLAVE; START SLAVE; (the slave
will resume at BEGIN whereas there has not been any rollback).
This is the problem of using opt_using_transactions instead of a
finer "does the slave support
_the_transactional_handler_used_on_the_master_".
More generally, we'll have problems when a query mixes a
transactional handler and MyISAM and STOP SLAVE is issued in the
middle of the "transaction". START SLAVE will resume at BEGIN
while the MyISAM table has already been updated.
*/
if ((thd->options & OPTION_BEGIN) && opt_using_transactions)
rli->inc_event_relay_log_pos();
@@ -435,8 +437,8 @@ int Log_event::exec_event(struct st_relay_log_info* rli)
rli->inc_group_relay_log_pos(log_pos);
flush_relay_log_info(rli);
/*
Note that Rotate_log_event::exec_event() does not call this function,
so there is no chance that a fake rotate event resets
Note that Rotate_log_event::exec_event() does not call this
function, so there is no chance that a fake rotate event resets
last_master_timestamp.
Note that we update without mutex (probably ok - except in some very
rare cases, only consequence is that value may take some time to
@@ -649,11 +651,9 @@ end:
#ifndef MYSQL_CLIENT
#define UNLOCK_MUTEX if (log_lock) pthread_mutex_unlock(log_lock);
#define LOCK_MUTEX if (log_lock) pthread_mutex_lock(log_lock);
#define max_allowed_packet current_thd->variables.max_allowed_packet
#else
#define UNLOCK_MUTEX
#define LOCK_MUTEX
#define max_allowed_packet (*mysql_get_parameters()->p_max_allowed_packet)
#endif
/*
@@ -670,16 +670,17 @@ Log_event* Log_event::read_log_event(IO_CACHE* file,
#else
Log_event* Log_event::read_log_event(IO_CACHE* file,
const Format_description_log_event *description_event)
#endif
#endif
{
DBUG_ENTER("Log_event::read_log_event(IO_CACHE *, Format_description_log_event *");
DBUG_ASSERT(description_event);
char head[LOG_EVENT_MINIMAL_HEADER_LEN];
/*
First we only want to read at most LOG_EVENT_MINIMAL_HEADER_LEN, just to
check the event for sanity and to know its length; no need to really parse
it. We say "at most" because this could be a 3.23 master, which has header
of 13 bytes, whereas LOG_EVENT_MINIMAL_HEADER_LEN is 19 bytes (it's "minimal"
over the set {MySQL >=4.0}).
of 13 bytes, whereas LOG_EVENT_MINIMAL_HEADER_LEN is 19 bytes (it's
"minimal" over the set {MySQL >=4.0}).
*/
uint header_size= min(description_event->common_header_len,
LOG_EVENT_MINIMAL_HEADER_LEN);
@@ -692,17 +693,21 @@ Log_event* Log_event::read_log_event(IO_CACHE* file,
failed my_b_read"));
UNLOCK_MUTEX;
/*
No error here; it could be that we are at the file's end. However if the
next my_b_read() fails (below), it will be an error as we were able to
read the first bytes.
No error here; it could be that we are at the file's end. However
if the next my_b_read() fails (below), it will be an error as we
were able to read the first bytes.
*/
return 0;
DBUG_RETURN(0);
}
uint data_len = uint4korr(head + EVENT_LEN_OFFSET);
char *buf= 0;
const char *error= 0;
Log_event *res= 0;
#ifndef max_allowed_packet
THD *thd=current_thd;
uint max_allowed_packet= thd ? thd->variables.max_allowed_packet : ~0;
#endif
if (data_len > max_allowed_packet)
{
@@ -729,16 +734,16 @@ failed my_b_read"));
error = "read error";
goto err;
}
if ((res= read_log_event(buf, data_len, &error,
description_event)))
if ((res= read_log_event(buf, data_len, &error, description_event)))
res->register_temp_buf(buf);
err:
UNLOCK_MUTEX;
if (error)
if (!res)
{
sql_print_error("\
Error in Log_event::read_log_event(): '%s', data_len: %d, event_type: %d",
DBUG_ASSERT(error);
sql_print_error("Error in Log_event::read_log_event(): "
"'%s', data_len: %d, event_type: %d",
error,data_len,head[EVENT_TYPE_OFFSET]);
my_free(buf, MYF(MY_ALLOW_ZERO_PTR));
/*
@@ -751,7 +756,7 @@ Error in Log_event::read_log_event(): '%s', data_len: %d, event_type: %d",
*/
file->error= -1;
}
return res;
DBUG_RETURN(res);
}
@@ -775,7 +780,7 @@ Log_event* Log_event::read_log_event(const char* buf, uint event_len,
*error="Sanity check failed"; // Needed to free buffer
DBUG_RETURN(NULL); // general sanity check - will fail on a partial read
}
switch(buf[EVENT_TYPE_OFFSET]) {
case QUERY_EVENT:
ev = new Query_log_event(buf, event_len, description_event);
@@ -809,14 +814,15 @@ Log_event* Log_event::read_log_event(const char* buf, uint event_len,
case START_EVENT_V3: /* this is sent only by MySQL <=4.x */
ev = new Start_log_event_v3(buf, description_event);
break;
#ifdef HAVE_REPLICATION
case STOP_EVENT:
ev = new Stop_log_event(buf, description_event);
break;
#endif /* HAVE_REPLICATION */
case INTVAR_EVENT:
ev = new Intvar_log_event(buf, description_event);
break;
case XID_EVENT:
ev = new Xid_log_event(buf, description_event);
break;
case RAND_EVENT:
ev = new Rand_log_event(buf, description_event);
break;
@@ -831,14 +837,15 @@ Log_event* Log_event::read_log_event(const char* buf, uint event_len,
ev= NULL;
break;
}
/*
is_valid() are small event-specific sanity tests which are important; for
example there are some my_malloc() in constructors
(e.g. Query_log_event::Query_log_event(char*...)); when these my_malloc()
fail we can't return an error out of the constructor (because constructor
is "void") ; so instead we leave the pointer we wanted to allocate
(e.g. 'query') to 0 and we test it in is_valid(). Same for
Format_description_log_event, member 'post_header_len'.
is_valid() are small event-specific sanity tests which are
important; for example there are some my_malloc() in constructors
(e.g. Query_log_event::Query_log_event(char*...)); when these
my_malloc() fail we can't return an error out of the constructor
(because constructor is "void") ; so instead we leave the pointer we
wanted to allocate (e.g. 'query') to 0 and we test it in is_valid().
Same for Format_description_log_event, member 'post_header_len'.
*/
if (!ev || !ev->is_valid())
{
@@ -1082,8 +1089,8 @@ bool Query_log_event::write(IO_CACHE* file)
return (write_header(file, event_length) ||
my_b_safe_write(file, (byte*) buf, (uint) (start-buf)) ||
my_b_safe_write(file, (db) ? (byte*) db : (byte*)"", db_len + 1) ||
my_b_safe_write(file, (byte*) query, q_len)) ? 1 : 0;
my_b_safe_write(file, (db) ? (byte*) db : (byte*)"", db_len + 1) ||
my_b_safe_write(file, (byte*) query, q_len)) ? 1 : 0;
}
@@ -1095,7 +1102,7 @@ bool Query_log_event::write(IO_CACHE* file)
Query_log_event::Query_log_event(THD* thd_arg, const char* query_arg,
ulong query_length, bool using_trans,
bool suppress_use)
:Log_event(thd_arg,
:Log_event(thd_arg,
((thd_arg->tmp_table_used ? LOG_EVENT_THREAD_SPECIFIC_F : 0)
| (suppress_use ? LOG_EVENT_SUPPRESS_USE_F : 0)),
using_trans),
@@ -1303,18 +1310,12 @@ void Query_log_event::print(FILE* file, bool short_form,
my_fwrite(file, (byte*) buff, (uint) (end-buff),MYF(MY_NABP | MY_WME));
if (flags & LOG_EVENT_THREAD_SPECIFIC_F)
fprintf(file,"SET @@session.pseudo_thread_id=%lu;\n",(ulong)thread_id);
/*
Now the session variables;
it's more efficient to pass SQL_MODE as a number instead of a
comma-separated list.
FOREIGN_KEY_CHECKS, SQL_AUTO_IS_NULL, UNIQUE_CHECKS are session-only
variables (they have no global version; they're not listed in sql_class.h),
The tests below work for pure binlogs or pure relay logs. Won't work for
mixed relay logs but we don't create mixed relay logs (that is, there is no
relay log with a format change except within the 3 first events, which
mysqlbinlog handles gracefully). So this code should always be good.
*/
/*
If flags2_inited==0, this is an event from 3.23 or 4.0; nothing to
print (remember we don't produce mixed relay logs so there cannot be
5.0 events before that one so there is nothing to reset).
*/
if (likely(flags2_inited)) /* likely as this will mainly read 5.0 logs */
{
/* tmp is a bitmask of bits which have changed. */
@@ -1343,9 +1344,16 @@ void Query_log_event::print(FILE* file, bool short_form,
}
/*
If flags2_inited==0, this is an event from 3.23 or 4.0; nothing to print
(remember we don't produce mixed relay logs so there cannot be 5.0 events
before that one so there is nothing to reset).
Now the session variables;
it's more efficient to pass SQL_MODE as a number instead of a
comma-separated list.
FOREIGN_KEY_CHECKS, SQL_AUTO_IS_NULL, UNIQUE_CHECKS are session-only
variables (they have no global version; they're not listed in
sql_class.h), The tests below work for pure binlogs or pure relay
logs. Won't work for mixed relay logs but we don't create mixed
relay logs (that is, there is no relay log with a format change
except within the 3 first events, which mysqlbinlog handles
gracefully). So this code should always be good.
*/
if (likely(sql_mode_inited))
@@ -1439,7 +1447,7 @@ int Query_log_event::exec_event(struct st_relay_log_info* rli)
thd->query_length= q_len;
thd->query = (char*)query;
VOID(pthread_mutex_lock(&LOCK_thread_count));
thd->query_id = query_id++;
thd->query_id = next_query_id();
VOID(pthread_mutex_unlock(&LOCK_thread_count));
thd->variables.pseudo_thread_id= thread_id; // for temp tables
mysql_log.write(thd,COM_QUERY,"%s",thd->query);
@@ -1759,15 +1767,19 @@ int Start_log_event_v3::exec_event(struct st_relay_log_info* rli)
}
/*
As a transaction NEVER spans on 2 or more binlogs:
if we have an active transaction at this point, the master died while
writing the transaction to the binary log, i.e. while flushing the binlog
cache to the binlog. As the write was started, the transaction had been
committed on the master, so we lack of information to replay this
transaction on the slave; all we can do is stop with error.
Note: this event could be sent by the master to inform us of the format
of its binlog; in other words maybe it is not at its original place when
it comes to us; we'll know this by checking log_pos ("artificial" events
have log_pos == 0).
if we have an active transaction at this point, the master died
while writing the transaction to the binary log, i.e. while
flushing the binlog cache to the binlog. As the write was started,
the transaction had been committed on the master, so we lack of
information to replay this transaction on the slave; all we can do
is stop with error.
Note: this event could be sent by the master to inform us of the
format of its binlog; in other words maybe it is not at its
original place when it comes to us; we'll know this by checking
log_pos ("artificial" events have log_pos == 0).
TODO test whether it's really necessary, as slave.cc does ROLLBACK
itself
*/
if (!artificial_event && (thd->options & OPTION_BEGIN))
{
@@ -1836,8 +1848,7 @@ binary log.");
*/
Format_description_log_event::
Format_description_log_event(uint8 binlog_ver,
const char* server_ver)
Format_description_log_event(uint8 binlog_ver, const char* server_ver)
:Start_log_event_v3()
{
created= when;
@@ -1849,7 +1860,7 @@ Format_description_log_event(uint8 binlog_ver,
number_of_event_types= LOG_EVENT_TYPES;
/* we'll catch my_malloc() error in is_valid() */
post_header_len=(uint8*) my_malloc(number_of_event_types*sizeof(uint8),
MYF(0));
MYF(MY_ZEROFILL));
/*
This long list of assignments is not beautiful, but I see no way to
make it nicer, as the right members are #defines, not array members, so
@@ -1859,18 +1870,13 @@ Format_description_log_event(uint8 binlog_ver,
{
post_header_len[START_EVENT_V3-1]= START_V3_HEADER_LEN;
post_header_len[QUERY_EVENT-1]= QUERY_HEADER_LEN;
post_header_len[STOP_EVENT-1]= 0;
post_header_len[ROTATE_EVENT-1]= ROTATE_HEADER_LEN;
post_header_len[INTVAR_EVENT-1]= 0;
post_header_len[LOAD_EVENT-1]= LOAD_HEADER_LEN;
post_header_len[SLAVE_EVENT-1]= 0;
post_header_len[CREATE_FILE_EVENT-1]= CREATE_FILE_HEADER_LEN;
post_header_len[APPEND_BLOCK_EVENT-1]= APPEND_BLOCK_HEADER_LEN;
post_header_len[EXEC_LOAD_EVENT-1]= EXEC_LOAD_HEADER_LEN;
post_header_len[DELETE_FILE_EVENT-1]= DELETE_FILE_HEADER_LEN;
post_header_len[NEW_LOAD_EVENT-1]= post_header_len[LOAD_EVENT-1];
post_header_len[RAND_EVENT-1]= 0;
post_header_len[USER_VAR_EVENT-1]= 0;
post_header_len[FORMAT_DESCRIPTION_EVENT-1]= FORMAT_DESCRIPTION_HEADER_LEN;
}
break;
@@ -1957,8 +1963,7 @@ Format_description_log_event(const char* buf,
/* If alloc fails, we'll detect it in is_valid() */
post_header_len= (uint8*) my_memdup((byte*)buf+ST_COMMON_HEADER_LEN_OFFSET+1,
number_of_event_types*
sizeof(*post_header_len),
MYF(0));
sizeof(*post_header_len), MYF(0));
DBUG_VOID_RETURN;
}
@@ -2038,7 +2043,7 @@ int Format_description_log_event::exec_event(struct st_relay_log_info* rli)
/**************************************************************************
Load_log_event methods
General note about Load_log_event: the binlogging of LOAD DATA INFILE is
going to be changed in 5.0 (or maybe in 4.1; not decided yet).
going to be changed in 5.0 (or maybe in 5.1; not decided yet).
However, the 5.0 slave could still have to read such events (from a 4.x
master), convert them (which just means maybe expand the header, when 5.0
servers have a UID in events) (remember that whatever is after the header
@@ -2553,7 +2558,7 @@ int Load_log_event::exec_event(NET* net, struct st_relay_log_info* rli,
{
thd->set_time((time_t)when);
VOID(pthread_mutex_lock(&LOCK_thread_count));
thd->query_id = query_id++;
thd->query_id = next_query_id();
VOID(pthread_mutex_unlock(&LOCK_thread_count));
/*
Initing thd->row_count is not necessary in theory as this variable has no
@@ -3068,6 +3073,74 @@ int Rand_log_event::exec_event(struct st_relay_log_info* rli)
#endif /* !MYSQL_CLIENT */
/**************************************************************************
Xid_log_event methods
**************************************************************************/
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
void Xid_log_event::pack_info(Protocol *protocol)
{
char buf[128], *pos;
pos= strmov(buf, "COMMIT /* xid=");
pos= longlong10_to_str(xid, pos, 10);
pos= strmov(pos, " */");
protocol->store(buf, (uint) (pos-buf), &my_charset_bin);
}
#endif
/*
NOTE it's ok not to use int8store here,
as long as xid_t::set(ulonglong) and
xid_t::get_my_xid doesn't do it either
we don't care about actual values of xids as long as
identical numbers compare identically
*/
Xid_log_event::Xid_log_event(const char* buf,
const Format_description_log_event* description_event)
:Log_event(buf, description_event)
{
buf+= description_event->common_header_len;
xid=*((my_xid *)buf);
}
bool Xid_log_event::write(IO_CACHE* file)
{
return write_header(file, sizeof(xid)) ||
my_b_safe_write(file, (byte*) &xid, sizeof(xid));
}
#ifdef MYSQL_CLIENT
void Xid_log_event::print(FILE* file, bool short_form, LAST_EVENT_INFO* last_event_info)
{
if (!short_form)
{
char buf[64];
longlong10_to_str(xid, buf, 10);
print_header(file);
fprintf(file, "\tXid = %s\n", buf);
fflush(file);
}
fprintf(file, "COMMIT;\n");
}
#endif /* MYSQL_CLIENT */
#if defined(HAVE_REPLICATION) && !defined(MYSQL_CLIENT)
int Xid_log_event::exec_event(struct st_relay_log_info* rli)
{
rli->inc_event_relay_log_pos();
/* For a slave Xid_log_event is COMMIT */
thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
thd->server_status&= ~SERVER_STATUS_IN_TRANS;
return ha_commit(thd);
}
#endif /* !MYSQL_CLIENT */
/**************************************************************************
User_var_log_event methods
**************************************************************************/