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Auto-merge from mysql-next-mr.

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This commit is contained in:
Alexander Nozdrin
2009-11-05 15:08:37 +03:00
parent 1a8f08b006 16b603a8b0
commit d476bbb0be
457 changed files with 19019 additions and 8786 deletions
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518
libmysql/libmysql.c
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@ -249,16 +249,6 @@ void STDCALL mysql_thread_end()
#endif
}
/*
Let the user specify that we don't want SIGPIPE; This doesn't however work
with threaded applications as we can have multiple read in progress.
*/
static MYSQL* spawn_init(MYSQL* parent, const char* host,
unsigned int port,
const char* user,
const char* passwd);
/*
Expand wildcard to a sql string
@ -320,7 +310,7 @@ mysql_debug(const char *debug __attribute__((unused)))
/**************************************************************************
Close the server connection if we get a SIGPIPE
Ignore SIGPIPE handler
ARGSUSED
**************************************************************************/
@ -333,305 +323,6 @@ my_pipe_sig_handler(int sig __attribute__((unused)))
#endif
}
/* perform query on master */
my_bool STDCALL mysql_master_query(MYSQL *mysql, const char *q,
unsigned long length)
{
DBUG_ENTER("mysql_master_query");
if (mysql_master_send_query(mysql, q, length))
DBUG_RETURN(1);
DBUG_RETURN((*mysql->methods->read_query_result)(mysql));
}
my_bool STDCALL mysql_master_send_query(MYSQL *mysql, const char *q,
unsigned long length)
{
MYSQL *master = mysql->master;
DBUG_ENTER("mysql_master_send_query");
if (!master->net.vio && !mysql_real_connect(master,0,0,0,0,0,0,0))
DBUG_RETURN(1);
master->reconnect= 1;
mysql->last_used_con = master;
DBUG_RETURN(simple_command(master, COM_QUERY, (const uchar*) q, length, 1));
}
/* perform query on slave */
my_bool STDCALL mysql_slave_query(MYSQL *mysql, const char *q,
unsigned long length)
{
DBUG_ENTER("mysql_slave_query");
if (mysql_slave_send_query(mysql, q, length))
DBUG_RETURN(1);
DBUG_RETURN((*mysql->methods->read_query_result)(mysql));
}
my_bool STDCALL mysql_slave_send_query(MYSQL *mysql, const char *q,
unsigned long length)
{
MYSQL* last_used_slave, *slave_to_use = 0;
DBUG_ENTER("mysql_slave_send_query");
if ((last_used_slave = mysql->last_used_slave))
slave_to_use = last_used_slave->next_slave;
else
slave_to_use = mysql->next_slave;
/*
Next_slave is always safe to use - we have a circular list of slaves
if there are no slaves, mysql->next_slave == mysql
*/
mysql->last_used_con = mysql->last_used_slave = slave_to_use;
if (!slave_to_use->net.vio && !mysql_real_connect(slave_to_use, 0,0,0,
0,0,0,0))
DBUG_RETURN(1);
slave_to_use->reconnect= 1;
DBUG_RETURN(simple_command(slave_to_use, COM_QUERY, (const uchar*) q,
length, 1));
}
/* enable/disable parsing of all queries to decide
if they go on master or slave */
void STDCALL mysql_enable_rpl_parse(MYSQL* mysql)
{
mysql->options.rpl_parse = 1;
}
void STDCALL mysql_disable_rpl_parse(MYSQL* mysql)
{
mysql->options.rpl_parse = 0;
}
/* get the value of the parse flag */
int STDCALL mysql_rpl_parse_enabled(MYSQL* mysql)
{
return mysql->options.rpl_parse;
}
/* enable/disable reads from master */
void STDCALL mysql_enable_reads_from_master(MYSQL* mysql)
{
mysql->options.no_master_reads = 0;
}
void STDCALL mysql_disable_reads_from_master(MYSQL* mysql)
{
mysql->options.no_master_reads = 1;
}
/* get the value of the master read flag */
my_bool STDCALL mysql_reads_from_master_enabled(MYSQL* mysql)
{
return !(mysql->options.no_master_reads);
}
/*
We may get an error while doing replication internals.
In this case, we add a special explanation to the original
error
*/
static void expand_error(MYSQL* mysql, int error)
{
char tmp[MYSQL_ERRMSG_SIZE];
char *p;
uint err_length;
strmake(tmp, mysql->net.last_error, MYSQL_ERRMSG_SIZE-1);
p = strmake(mysql->net.last_error, ER(error), MYSQL_ERRMSG_SIZE-1);
err_length= (uint) (p - mysql->net.last_error);
strmake(p, tmp, MYSQL_ERRMSG_SIZE-1 - err_length);
mysql->net.last_errno = error;
}
/*
This function assumes we have just called SHOW SLAVE STATUS and have
read the given result and row
*/
static my_bool get_master(MYSQL* mysql, MYSQL_RES* res, MYSQL_ROW row)
{
MYSQL* master;
DBUG_ENTER("get_master");
if (mysql_num_fields(res) < 3)
DBUG_RETURN(1); /* safety */
/* use the same username and password as the original connection */
if (!(master = spawn_init(mysql, row[0], atoi(row[2]), 0, 0)))
DBUG_RETURN(1);
mysql->master = master;
DBUG_RETURN(0);
}
/*
Assuming we already know that mysql points to a master connection,
retrieve all the slaves
*/
static my_bool get_slaves_from_master(MYSQL* mysql)
{
MYSQL_RES* res = 0;
MYSQL_ROW row;
my_bool error = 1;
int has_auth_info;
int port_ind;
DBUG_ENTER("get_slaves_from_master");
if (!mysql->net.vio && !mysql_real_connect(mysql,0,0,0,0,0,0,0))
{
expand_error(mysql, CR_PROBE_MASTER_CONNECT);
DBUG_RETURN(1);
}
mysql->reconnect= 1;
if (mysql_query(mysql, "SHOW SLAVE HOSTS") ||
!(res = mysql_store_result(mysql)))
{
expand_error(mysql, CR_PROBE_SLAVE_HOSTS);
DBUG_RETURN(1);
}
switch (mysql_num_fields(res)) {
case 5:
has_auth_info = 0;
port_ind=2;
break;
case 7:
has_auth_info = 1;
port_ind=4;
break;
default:
goto err;
}
while ((row = mysql_fetch_row(res)))
{
MYSQL* slave;
const char* tmp_user, *tmp_pass;
if (has_auth_info)
{
tmp_user = row[2];
tmp_pass = row[3];
}
else
{
tmp_user = mysql->user;
tmp_pass = mysql->passwd;
}
if (!(slave = spawn_init(mysql, row[1], atoi(row[port_ind]),
tmp_user, tmp_pass)))
goto err;
/* Now add slave into the circular linked list */
slave->next_slave = mysql->next_slave;
mysql->next_slave = slave;
}
error = 0;
err:
if (res)
mysql_free_result(res);
DBUG_RETURN(error);
}
my_bool STDCALL mysql_rpl_probe(MYSQL* mysql)
{
MYSQL_RES *res= 0;
MYSQL_ROW row;
my_bool error= 1;
DBUG_ENTER("mysql_rpl_probe");
/*
First determine the replication role of the server we connected to
the most reliable way to do this is to run SHOW SLAVE STATUS and see
if we have a non-empty master host. This is still not fool-proof -
it is not a sin to have a master that has a dormant slave thread with
a non-empty master host. However, it is more reliable to check
for empty master than whether the slave thread is actually running
*/
if (mysql_query(mysql, "SHOW SLAVE STATUS") ||
!(res = mysql_store_result(mysql)))
{
expand_error(mysql, CR_PROBE_SLAVE_STATUS);
DBUG_RETURN(1);
}
row= mysql_fetch_row(res);
/*
Check master host for emptiness/NULL
For MySQL 4.0 it's enough to check for row[0]
*/
if (row && row[0] && *(row[0]))
{
/* this is a slave, ask it for the master */
if (get_master(mysql, res, row) || get_slaves_from_master(mysql))
goto err;
}
else
{
mysql->master = mysql;
if (get_slaves_from_master(mysql))
goto err;
}
error = 0;
err:
if (res)
mysql_free_result(res);
DBUG_RETURN(error);
}
/*
Make a not so fool-proof decision on where the query should go, to
the master or the slave. Ideally the user should always make this
decision himself with mysql_master_query() or mysql_slave_query().
However, to be able to more easily port the old code, we support the
option of an educated guess - this should work for most applications,
however, it may make the wrong decision in some particular cases. If
that happens, the user would have to change the code to call
mysql_master_query() or mysql_slave_query() explicitly in the place
where we have made the wrong decision
*/
enum mysql_rpl_type
STDCALL mysql_rpl_query_type(const char* q, int len)
{
const char *q_end= q + len;
for (; q < q_end; ++q)
{
char c;
if (my_isalpha(&my_charset_latin1, (c= *q)))
{
switch (my_tolower(&my_charset_latin1,c)) {
case 'i': /* insert */
case 'u': /* update or unlock tables */
case 'l': /* lock tables or load data infile */
case 'd': /* drop or delete */
case 'a': /* alter */
return MYSQL_RPL_MASTER;
case 'c': /* create or check */
return my_tolower(&my_charset_latin1,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
MYSQL_RPL_MASTER;
case 's': /* select or show */
return my_tolower(&my_charset_latin1,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
MYSQL_RPL_SLAVE;
case 'f': /* flush */
case 'r': /* repair */
case 'g': /* grant */
return MYSQL_RPL_ADMIN;
default:
return MYSQL_RPL_SLAVE;
}
}
}
return MYSQL_RPL_MASTER; /* By default, send to master */
}
/**************************************************************************
Connect to sql server
@ -1093,68 +784,6 @@ mysql_query(MYSQL *mysql, const char *query)
}
static MYSQL* spawn_init(MYSQL* parent, const char* host,
unsigned int port, const char* user,
const char* passwd)
{
MYSQL* child;
DBUG_ENTER("spawn_init");
if (!(child= mysql_init(0)))
DBUG_RETURN(0);
child->options.user= my_strdup((user) ? user :
(parent->user ? parent->user :
parent->options.user), MYF(0));
child->options.password= my_strdup((passwd) ? passwd :
(parent->passwd ?
parent->passwd :
parent->options.password), MYF(0));
child->options.port= port;
child->options.host= my_strdup((host) ? host :
(parent->host ?
parent->host :
parent->options.host), MYF(0));
if (parent->db)
child->options.db= my_strdup(parent->db, MYF(0));
else if (parent->options.db)
child->options.db= my_strdup(parent->options.db, MYF(0));
/*
rpl_pivot is set to 1 in mysql_init(); Reset it as we are not doing
replication here
*/
child->rpl_pivot= 0;
DBUG_RETURN(child);
}
int
STDCALL mysql_set_master(MYSQL* mysql, const char* host,
unsigned int port, const char* user,
const char* passwd)
{
if (mysql->master != mysql && !mysql->master->rpl_pivot)
mysql_close(mysql->master);
if (!(mysql->master = spawn_init(mysql, host, port, user, passwd)))
return 1;
return 0;
}
int
STDCALL mysql_add_slave(MYSQL* mysql, const char* host,
unsigned int port,
const char* user,
const char* passwd)
{
MYSQL* slave;
if (!(slave = spawn_init(mysql, host, port, user, passwd)))
return 1;
slave->next_slave = mysql->next_slave;
mysql->next_slave = slave;
return 0;
}
/**************************************************************************
Return next field of the query results
**************************************************************************/
@ -1483,17 +1112,17 @@ MYSQL_FIELD_OFFSET STDCALL mysql_field_tell(MYSQL_RES *res)
unsigned int STDCALL mysql_field_count(MYSQL *mysql)
{
return mysql->last_used_con->field_count;
return mysql->field_count;
}
my_ulonglong STDCALL mysql_affected_rows(MYSQL *mysql)
{
return mysql->last_used_con->affected_rows;
return mysql->affected_rows;
}
my_ulonglong STDCALL mysql_insert_id(MYSQL *mysql)
{
return mysql->last_used_con->insert_id;
return mysql->insert_id;
}
const char *STDCALL mysql_sqlstate(MYSQL *mysql)
@ -1858,7 +1487,6 @@ my_bool cli_read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
MYSQL_DATA *fields_data;
DBUG_ENTER("cli_read_prepare_result");
mysql= mysql->last_used_con;
if ((packet_length= cli_safe_read(mysql)) == packet_error)
DBUG_RETURN(1);
mysql->warning_count= 0;
@ -2092,7 +1720,9 @@ static void alloc_stmt_fields(MYSQL_STMT *stmt)
{
MYSQL_FIELD *fields, *field, *end;
MEM_ROOT *alloc= &stmt->mem_root;
MYSQL *mysql= stmt->mysql->last_used_con;
MYSQL *mysql= stmt->mysql;
DBUG_ASSERT(mysql->field_count);
stmt->field_count= mysql->field_count;
@ -2115,18 +1745,21 @@ static void alloc_stmt_fields(MYSQL_STMT *stmt)
field= stmt->fields;
field && fields < end; fields++, field++)
{
field->db = strdup_root(alloc,fields->db);
field->table = strdup_root(alloc,fields->table);
field->org_table= strdup_root(alloc,fields->org_table);
field->name = strdup_root(alloc,fields->name);
field->org_name = strdup_root(alloc,fields->org_name);
field->charsetnr= fields->charsetnr;
field->length = fields->length;
field->type = fields->type;
field->flags = fields->flags;
field->decimals = fields->decimals;
field->def = fields->def ? strdup_root(alloc,fields->def): 0;
field->max_length= 0;
*field= *fields; /* To copy all numeric parts. */
field->catalog= strmake_root(alloc, fields->catalog,
fields->catalog_length);
field->db= strmake_root(alloc, fields->db, fields->db_length);
field->table= strmake_root(alloc, fields->table, fields->table_length);
field->org_table= strmake_root(alloc, fields->org_table,
fields->org_table_length);
field->name= strmake_root(alloc, fields->name, fields->name_length);
field->org_name= strmake_root(alloc, fields->org_name,
fields->org_name_length);
field->def= fields->def ? strmake_root(alloc, fields->def,
fields->def_length) : 0;
field->def_length= field->def ? fields->def_length : 0;
field->extension= 0; /* Avoid dangling links. */
field->max_length= 0; /* max_length is set in mysql_stmt_store_result() */
}
}
@ -2479,7 +2112,6 @@ static my_bool execute(MYSQL_STMT *stmt, char *packet, ulong length)
DBUG_ENTER("execute");
DBUG_DUMP("packet", (uchar *) packet, length);
mysql->last_used_con= mysql;
int4store(buff, stmt->stmt_id); /* Send stmt id to server */
buff[4]= (char) stmt->flags;
int4store(buff+5, 1); /* iteration count */
@ -2854,6 +2486,33 @@ static void reinit_result_set_metadata(MYSQL_STMT *stmt)
}
static void prepare_to_fetch_result(MYSQL_STMT *stmt)
{
if (stmt->server_status & SERVER_STATUS_CURSOR_EXISTS)
{
stmt->mysql->status= MYSQL_STATUS_READY;
stmt->read_row_func= stmt_read_row_from_cursor;
}
else if (stmt->flags & CURSOR_TYPE_READ_ONLY)
{
/*
This is a single-row result set, a result set with no rows, EXPLAIN,
SHOW VARIABLES, or some other command which either a) bypasses the
cursors framework in the server and writes rows directly to the
network or b) is more efficient if all (few) result set rows are
precached on client and server's resources are freed.
*/
mysql_stmt_store_result(stmt);
}
else
{
stmt->mysql->unbuffered_fetch_owner= &stmt->unbuffered_fetch_cancelled;
stmt->unbuffered_fetch_cancelled= FALSE;
stmt->read_row_func= stmt_read_row_unbuffered;
}
}
/*
Send placeholders data to server (if there are placeholders)
and execute prepared statement.
@ -2921,28 +2580,7 @@ int STDCALL mysql_stmt_execute(MYSQL_STMT *stmt)
if (mysql->field_count)
{
reinit_result_set_metadata(stmt);
if (stmt->server_status & SERVER_STATUS_CURSOR_EXISTS)
{
mysql->status= MYSQL_STATUS_READY;
stmt->read_row_func= stmt_read_row_from_cursor;
}
else if (stmt->flags & CURSOR_TYPE_READ_ONLY)
{
/*
This is a single-row result set, a result set with no rows, EXPLAIN,
SHOW VARIABLES, or some other command which either a) bypasses the
cursors framework in the server and writes rows directly to the
network or b) is more efficient if all (few) result set rows are
precached on client and server's resources are freed.
*/
mysql_stmt_store_result(stmt);
}
else
{
stmt->mysql->unbuffered_fetch_owner= &stmt->unbuffered_fetch_cancelled;
stmt->unbuffered_fetch_cancelled= FALSE;
stmt->read_row_func= stmt_read_row_unbuffered;
}
prepare_to_fetch_result(stmt);
}
DBUG_RETURN(test(stmt->last_errno));
}
@ -4407,7 +4045,6 @@ static my_bool setup_one_fetch_function(MYSQL_BIND *param, MYSQL_FIELD *field)
field->max_length= 10; /* 2003-11-11 */
param->skip_result= skip_result_with_length;
break;
break;
case MYSQL_TYPE_DATETIME:
case MYSQL_TYPE_TIMESTAMP:
param->skip_result= skip_result_with_length;
@ -4689,7 +4326,6 @@ int cli_read_binary_rows(MYSQL_STMT *stmt)
}
net = &mysql->net;
mysql= mysql->last_used_con;
while ((pkt_len= cli_safe_read(mysql)) != packet_error)
{
@ -4787,8 +4423,6 @@ int STDCALL mysql_stmt_store_result(MYSQL_STMT *stmt)
DBUG_RETURN(1);
}
mysql= mysql->last_used_con;
if (!stmt->field_count)
DBUG_RETURN(0);
@ -4990,7 +4624,7 @@ static my_bool reset_stmt_handle(MYSQL_STMT *stmt, uint flags)
if (stmt->field_count && mysql->status != MYSQL_STATUS_READY)
{
/* There is a result set and it belongs to this statement */
(*mysql->methods->flush_use_result)(mysql);
(*mysql->methods->flush_use_result)(mysql, FALSE);
if (mysql->unbuffered_fetch_owner)
*mysql->unbuffered_fetch_owner= TRUE;
mysql->status= MYSQL_STATUS_READY;
@ -5074,7 +4708,7 @@ my_bool STDCALL mysql_stmt_close(MYSQL_STMT *stmt)
Flush result set of the connection. If it does not belong
to this statement, set a warning.
*/
(*mysql->methods->flush_use_result)(mysql);
(*mysql->methods->flush_use_result)(mysql, TRUE);
if (mysql->unbuffered_fetch_owner)
*mysql->unbuffered_fetch_owner= TRUE;
mysql->status= MYSQL_STATUS_READY;
@ -5193,8 +4827,7 @@ my_bool STDCALL mysql_more_results(MYSQL *mysql)
my_bool res;
DBUG_ENTER("mysql_more_results");
res= ((mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS) ?
1: 0);
res= ((mysql->server_status & SERVER_MORE_RESULTS_EXISTS) ? 1: 0);
DBUG_PRINT("exit",("More results exists ? %d", res));
DBUG_RETURN(res);
}
@ -5216,13 +4849,56 @@ int STDCALL mysql_next_result(MYSQL *mysql)
net_clear_error(&mysql->net);
mysql->affected_rows= ~(my_ulonglong) 0;
if (mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS)
if (mysql->server_status & SERVER_MORE_RESULTS_EXISTS)
DBUG_RETURN((*mysql->methods->next_result)(mysql));
DBUG_RETURN(-1); /* No more results */
}
int STDCALL mysql_stmt_next_result(MYSQL_STMT *stmt)
{
MYSQL *mysql= stmt->mysql;
int rc;
DBUG_ENTER("mysql_stmt_next_result");
if (!mysql)
DBUG_RETURN(1);
if (stmt->last_errno)
DBUG_RETURN(stmt->last_errno);
if (mysql->server_status & SERVER_MORE_RESULTS_EXISTS)
{
if (reset_stmt_handle(stmt, RESET_STORE_RESULT))
DBUG_RETURN(1);
}
rc= mysql_next_result(mysql);
if (rc)
{
set_stmt_errmsg(stmt, &mysql->net);
DBUG_RETURN(rc);
}
stmt->state= MYSQL_STMT_EXECUTE_DONE;
stmt->bind_result_done= FALSE;
if (mysql->field_count)
{
alloc_stmt_fields(stmt);
prepare_to_fetch_result(stmt);
}
else
{
stmt->field_count= mysql->field_count;
}
DBUG_RETURN(0);
}
MYSQL_RES * STDCALL mysql_use_result(MYSQL *mysql)
{
return (*mysql->methods->use_result)(mysql);