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mariadb/sql/sql_parse.cc
unknown 86f1a1e0d0 Merge sanja.is.com.ua:/home/bell/mysql/mysql-4.1 
into sanja.is.com.ua:/home/bell/mysql/work-crash-4.1


sql/sql_parse.cc:
  Auto merged
2002-11-12 15:27:11 +02:00

3656 lines
102 KiB
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/* Copyright (C) 2000 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "mysql_priv.h"
#include "sql_acl.h"
#include "sql_repl.h"
#include "repl_failsafe.h"
#include <m_ctype.h>
#include <myisam.h>
#include <my_dir.h>
#include <assert.h>
#ifdef HAVE_INNOBASE_DB
#include "ha_innodb.h"
#endif
#ifdef HAVE_OPENSSL
/*
Without SSL the handshake consists of one packet. This packet
has both client capabilites and scrambled password.
With SSL the handshake might consist of two packets. If the first
packet (client capabilities) has CLIENT_SSL flag set, we have to
switch to SSL and read the second packet. The scrambled password
is in the second packet and client_capabilites field will be ignored.
Maybe it is better to accept flags other than CLIENT_SSL from the
second packet?
*/
#define SSL_HANDSHAKE_SIZE 2
#define NORMAL_HANDSHAKE_SIZE 6
#define MIN_HANDSHAKE_SIZE 2
#else
#define MIN_HANDSHAKE_SIZE 6
#endif /* HAVE_OPENSSL */
#define SCRAMBLE_LENGTH 8
#define MEM_ROOT_BLOCK_SIZE 8192
#define MEM_ROOT_PREALLOC 8192
#define TRANS_MEM_ROOT_BLOCK_SIZE 4096
#define TRANS_MEM_ROOT_PREALLOC 4096
extern int yyparse(void);
extern "C" pthread_mutex_t THR_LOCK_keycache;
#ifdef SOLARIS
extern "C" int gethostname(char *name, int namelen);
#endif
static int check_for_max_user_connections(THD *thd, USER_CONN *uc);
static void decrease_user_connections(USER_CONN *uc);
static bool check_db_used(THD *thd,TABLE_LIST *tables);
static bool check_merge_table_access(THD *thd, char *db, TABLE_LIST *tables);
static bool check_dup(const char *db, const char *name, TABLE_LIST *tables);
static void remove_escape(char *name);
static void refresh_status(void);
static bool append_file_to_dir(THD *thd, char **filename_ptr,
char *table_name);
const char *any_db="*any*"; // Special symbol for check_access
const char *command_name[]={
"Sleep", "Quit", "Init DB", "Query", "Field List", "Create DB",
"Drop DB", "Refresh", "Shutdown", "Statistics", "Processlist",
"Connect","Kill","Debug","Ping","Time","Delayed_insert","Change user",
"Binlog Dump","Table Dump", "Connect Out", "Register Slave",
"Prepare", "Prepare Execute", "Long Data"
};
static char empty_c_string[1]= {0}; // Used for not defined 'db'
#ifdef __WIN__
static void test_signal(int sig_ptr)
{
#if !defined( DBUG_OFF)
MessageBox(NULL,"Test signal","DBUG",MB_OK);
#endif
#if defined(OS2)
fprintf(stderr, "Test signal %d\n", sig_ptr);
fflush(stderr);
#endif
}
static void init_signals(void)
{
int signals[7] = {SIGINT,SIGILL,SIGFPE,SIGSEGV,SIGTERM,SIGBREAK,SIGABRT } ;
for (int i=0 ; i < 7 ; i++)
signal( signals[i], test_signal) ;
}
#endif
inline bool end_active_trans(THD *thd)
{
int error=0;
if (thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN |
OPTION_TABLE_LOCK))
{
thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
thd->server_status&= ~SERVER_STATUS_IN_TRANS;
if (ha_commit(thd))
error=1;
}
return error;
}
static HASH hash_user_connections;
extern pthread_mutex_t LOCK_user_conn;
static int get_or_create_user_conn(THD *thd, const char *user,
const char *host,
USER_RESOURCES *mqh)
{
int return_val=0;
uint temp_len, user_len, host_len;
char temp_user[USERNAME_LENGTH+HOSTNAME_LENGTH+2];
struct user_conn *uc;
DBUG_ASSERT(user != 0);
DBUG_ASSERT(host != 0);
user_len=strlen(user);
host_len=strlen(host);
temp_len= (strmov(strmov(temp_user, user)+1, host) - temp_user)+1;
(void) pthread_mutex_lock(&LOCK_user_conn);
if (!(uc = (struct user_conn *) hash_search(&hash_user_connections,
(byte*) temp_user, temp_len)))
{
/* First connection for user; Create a user connection object */
if (!(uc= ((struct user_conn*)
my_malloc(sizeof(struct user_conn) + temp_len+1,
MYF(MY_WME)))))
{
send_error(thd, 0, NullS); // Out of memory
return_val=1;
goto end;
}
uc->user=(char*) (uc+1);
memcpy(uc->user,temp_user,temp_len+1);
uc->user_len= user_len;
uc->host=uc->user + uc->user_len + 1;
uc->len = temp_len;
uc->connections = 1;
uc->questions=uc->updates=uc->conn_per_hour=0;
uc->user_resources=*mqh;
if (max_user_connections && mqh->connections > max_user_connections)
uc->user_resources.connections = max_user_connections;
uc->intime=thd->thr_create_time;
if (hash_insert(&hash_user_connections, (byte*) uc))
{
my_free((char*) uc,0);
send_error(thd, 0, NullS); // Out of memory
return_val=1;
goto end;
}
}
thd->user_connect=uc;
end:
(void) pthread_mutex_unlock(&LOCK_user_conn);
return return_val;
}
/*
Check if user is ok
Updates:
thd->user, thd->master_access, thd->priv_user, thd->db, thd->db_access
*/
static bool check_user(THD *thd,enum_server_command command, const char *user,
const char *passwd, const char *db, bool check_count)
{
thd->db=0;
thd->db_length=0;
USER_RESOURCES ur;
if (!(thd->user = my_strdup(user, MYF(0))))
{
send_error(thd,ER_OUT_OF_RESOURCES);
return 1;
}
thd->master_access=acl_getroot(thd, thd->host, thd->ip, thd->user,
passwd, thd->scramble, &thd->priv_user,
protocol_version == 9 ||
!(thd->client_capabilities &
CLIENT_LONG_PASSWORD),&ur);
DBUG_PRINT("info",
("Capabilities: %d packet_length: %d Host: '%s' User: '%s' Using password: %s Access: %u db: '%s'",
thd->client_capabilities, thd->max_client_packet_length,
thd->host_or_ip, thd->priv_user,
passwd[0] ? "yes": "no",
thd->master_access, thd->db ? thd->db : "*none*"));
if (thd->master_access & NO_ACCESS)
{
net_printf(thd, ER_ACCESS_DENIED_ERROR,
thd->user,
thd->host_or_ip,
passwd[0] ? ER(ER_YES) : ER(ER_NO));
mysql_log.write(thd,COM_CONNECT,ER(ER_ACCESS_DENIED_ERROR),
thd->user,
thd->host_or_ip,
passwd[0] ? ER(ER_YES) : ER(ER_NO));
return(1); // Error already given
}
if (check_count)
{
VOID(pthread_mutex_lock(&LOCK_thread_count));
bool tmp=(thread_count - delayed_insert_threads >= max_connections &&
!(thd->master_access & SUPER_ACL));
VOID(pthread_mutex_unlock(&LOCK_thread_count));
if (tmp)
{ // Too many connections
send_error(thd, ER_CON_COUNT_ERROR);
return(1);
}
}
mysql_log.write(thd,command,
(thd->priv_user == thd->user ?
(char*) "%s@%s on %s" :
(char*) "%s@%s as anonymous on %s"),
user,
thd->host_or_ip,
db ? db : (char*) "");
thd->db_access=0;
/* Don't allow user to connect if he has done too many queries */
if ((ur.questions || ur.updates || ur.connections) &&
get_or_create_user_conn(thd,user,thd->host_or_ip,&ur))
return -1;
if (thd->user_connect && thd->user_connect->user_resources.connections &&
check_for_max_user_connections(thd, thd->user_connect))
return -1;
if (db && db[0])
{
bool error=test(mysql_change_db(thd,db));
if (error && thd->user_connect)
decrease_user_connections(thd->user_connect);
return error;
}
else
send_ok(thd); // Ready to handle questions
return 0; // ok
}
/*
Check for maximum allowable user connections, if the mysqld server is
started with corresponding variable that is greater then 0.
*/
static byte* get_key_conn(user_conn *buff, uint *length,
my_bool not_used __attribute__((unused)))
{
*length=buff->len;
return (byte*) buff->user;
}
static void free_user(struct user_conn *uc)
{
my_free((char*) uc,MYF(0));
}
void init_max_user_conn(void)
{
(void) hash_init(&hash_user_connections,system_charset_info,max_connections,
0,0,
(hash_get_key) get_key_conn, (void (*)(void*)) free_user,
0);
}
static int check_for_max_user_connections(THD *thd, USER_CONN *uc)
{
int error=0;
DBUG_ENTER("check_for_max_user_connections");
if (max_user_connections &&
(max_user_connections <= (uint) uc->connections))
{
net_printf(thd,ER_TOO_MANY_USER_CONNECTIONS, uc->user);
error=1;
goto end;
}
uc->connections++;
if (uc->user_resources.connections &&
uc->conn_per_hour++ >= uc->user_resources.connections)
{
net_printf(thd, ER_USER_LIMIT_REACHED, uc->user,
"max_connections",
(long) uc->user_resources.connections);
error=1;
}
end:
DBUG_RETURN(error);
}
static void decrease_user_connections(USER_CONN *uc)
{
DBUG_ENTER("decrease_user_connections");
if ((uc->connections && !--uc->connections) && !mqh_used)
{
/* Last connection for user; Delete it */
(void) pthread_mutex_lock(&LOCK_user_conn);
(void) hash_delete(&hash_user_connections,(byte*) uc);
(void) pthread_mutex_unlock(&LOCK_user_conn);
}
DBUG_VOID_RETURN;
}
void free_max_user_conn(void)
{
hash_free(&hash_user_connections);
}
/*
Mark all commands that somehow changes a table
This is used to check number of updates / hour
*/
char uc_update_queries[SQLCOM_END];
void init_update_queries(void)
{
uc_update_queries[SQLCOM_CREATE_TABLE]=1;
uc_update_queries[SQLCOM_CREATE_INDEX]=1;
uc_update_queries[SQLCOM_ALTER_TABLE]=1;
uc_update_queries[SQLCOM_UPDATE]=1;
uc_update_queries[SQLCOM_INSERT]=1;
uc_update_queries[SQLCOM_INSERT_SELECT]=1;
uc_update_queries[SQLCOM_DELETE]=1;
uc_update_queries[SQLCOM_TRUNCATE]=1;
uc_update_queries[SQLCOM_DROP_TABLE]=1;
uc_update_queries[SQLCOM_LOAD]=1;
uc_update_queries[SQLCOM_CREATE_DB]=1;
uc_update_queries[SQLCOM_DROP_DB]=1;
uc_update_queries[SQLCOM_REPLACE]=1;
uc_update_queries[SQLCOM_REPLACE_SELECT]=1;
uc_update_queries[SQLCOM_RENAME_TABLE]=1;
uc_update_queries[SQLCOM_BACKUP_TABLE]=1;
uc_update_queries[SQLCOM_RESTORE_TABLE]=1;
uc_update_queries[SQLCOM_DELETE_MULTI]=1;
uc_update_queries[SQLCOM_DROP_INDEX]=1;
uc_update_queries[SQLCOM_MULTI_UPDATE]=1;
}
/*
Check if maximum queries per hour limit has been reached
returns 0 if OK.
In theory we would need a mutex in the USER_CONN structure for this to
be 100 % safe, but as the worst scenario is that we would miss counting
a couple of queries, this isn't critical.
*/
static bool check_mqh(THD *thd, uint check_command)
{
bool error=0;
time_t check_time = thd->start_time ? thd->start_time : time(NULL);
USER_CONN *uc=thd->user_connect;
DBUG_ENTER("check_mqh");
DBUG_ASSERT(uc != 0);
/* If more than a hour since last check, reset resource checking */
if (check_time - uc->intime >= 3600)
{
(void) pthread_mutex_lock(&LOCK_user_conn);
uc->questions=1;
uc->updates=0;
uc->conn_per_hour=0;
uc->intime=check_time;
(void) pthread_mutex_unlock(&LOCK_user_conn);
}
/* Check that we have not done too many questions / hour */
if (uc->user_resources.questions &&
uc->questions++ >= uc->user_resources.questions)
{
net_printf(thd, ER_USER_LIMIT_REACHED, uc->user, "max_questions",
(long) uc->user_resources.questions);
error=1;
goto end;
}
if (check_command < (uint) SQLCOM_END)
{
/* Check that we have not done too many updates / hour */
if (uc->user_resources.updates && uc_update_queries[check_command] &&
uc->updates++ >= uc->user_resources.updates)
{
net_printf(thd, ER_USER_LIMIT_REACHED, uc->user, "max_updates",
(long) uc->user_resources.updates);
error=1;
goto end;
}
}
end:
DBUG_RETURN(error);
}
static void reset_mqh(THD *thd, LEX_USER *lu, bool get_them=false)
{
(void) pthread_mutex_lock(&LOCK_user_conn);
if (lu) // for GRANT
{
USER_CONN *uc;
uint temp_len=lu->user.length+lu->host.length+2;
char temp_user[USERNAME_LENGTH+HOSTNAME_LENGTH+2];
memcpy(temp_user,lu->user.str,lu->user.length);
memcpy(temp_user+lu->user.length+1,lu->host.str,lu->host.length);
temp_user[lu->user.length]='\0'; temp_user[temp_len-1]=0;
if ((uc = (struct user_conn *) hash_search(&hash_user_connections,
(byte*) temp_user, temp_len)))
{
uc->questions=0;
get_mqh(temp_user,&temp_user[lu->user.length+1],uc);
uc->updates=0;
uc->conn_per_hour=0;
}
}
else // for FLUSH PRIVILEGES and FLUSH USER_RESOURCES
{
for (uint idx=0;idx < hash_user_connections.records; idx++)
{
USER_CONN *uc=(struct user_conn *) hash_element(&hash_user_connections, idx);
if (get_them)
get_mqh(uc->user,uc->host,uc);
uc->questions=0;
uc->updates=0;
uc->conn_per_hour=0;
}
}
(void) pthread_mutex_unlock(&LOCK_user_conn);
}
/*
Check connnetion and get priviliges
Returns 0 on ok, -1 < if error is given > 0 on error.
*/
static int
check_connections(THD *thd)
{
uint connect_errors=0;
NET *net= &thd->net;
/* Store the connection details */
DBUG_PRINT("info", (("check_connections called by thread %d"),
thd->thread_id));
DBUG_PRINT("info",("New connection received on %s",
vio_description(net->vio)));
if (!thd->host) // If TCP/IP connection
{
char ip[30];
if (vio_peer_addr(net->vio,ip))
return (ER_BAD_HOST_ERROR);
if (!(thd->ip = my_strdup(ip,MYF(0))))
return (ER_OUT_OF_RESOURCES);
thd->host_or_ip=thd->ip;
#if !defined(HAVE_SYS_UN_H) || defined(HAVE_mit_thread)
/* Fast local hostname resolve for Win32 */
if (!strcmp(thd->ip,"127.0.0.1"))
thd->host=(char*) localhost;
else
#endif
if (!(specialflag & SPECIAL_NO_RESOLVE))
{
vio_in_addr(net->vio,&thd->remote.sin_addr);
thd->host=ip_to_hostname(&thd->remote.sin_addr,&connect_errors);
if (connect_errors > max_connect_errors)
return(ER_HOST_IS_BLOCKED);
}
DBUG_PRINT("info",("Host: %s ip: %s",
thd->host ? thd->host : "unknown host",
thd->ip ? thd->ip : "unknown ip"));
if (acl_check_host(thd->host,thd->ip))
return(ER_HOST_NOT_PRIVILEGED);
}
else /* Hostname given means that the connection was on a socket */
{
DBUG_PRINT("info",("Host: %s",thd->host));
thd->host_or_ip=thd->host;
thd->ip=0;
bzero((char*) &thd->remote,sizeof(struct sockaddr));
}
vio_keepalive(net->vio, TRUE);
ulong pkt_len=0;
{
/* buff[] needs to big enough to hold the server_version variable */
char buff[SERVER_VERSION_LENGTH + SCRAMBLE_LENGTH+32],*end;
int client_flags = CLIENT_LONG_FLAG | CLIENT_CONNECT_WITH_DB | CLIENT_PROTOCOL_41;
if (opt_using_transactions)
client_flags|=CLIENT_TRANSACTIONS;
#ifdef HAVE_COMPRESS
client_flags |= CLIENT_COMPRESS;
#endif /* HAVE_COMPRESS */
#ifdef HAVE_OPENSSL
if (ssl_acceptor_fd)
client_flags |= CLIENT_SSL; /* Wow, SSL is avalaible! */
#endif /* HAVE_OPENSSL */
end=strnmov(buff,server_version,SERVER_VERSION_LENGTH)+1;
int4store((uchar*) end,thd->thread_id);
end+=4;
memcpy(end,thd->scramble,SCRAMBLE_LENGTH+1);
end+=SCRAMBLE_LENGTH +1;
int2store(end,client_flags);
end[2]=(char) MY_CHARSET_CURRENT;
int2store(end+3,thd->server_status);
bzero(end+5,13);
end+=18;
if (net_write_command(net,(uchar) protocol_version, "", 0, buff,
(uint) (end-buff)) ||
(pkt_len= my_net_read(net)) == packet_error ||
pkt_len < MIN_HANDSHAKE_SIZE)
{
inc_host_errors(&thd->remote.sin_addr);
return(ER_HANDSHAKE_ERROR);
}
}
#ifdef _CUSTOMCONFIG_
#include "_cust_sql_parse.h"
#endif
if (connect_errors)
reset_host_errors(&thd->remote.sin_addr);
if (thd->packet.alloc(thd->variables.net_buffer_length))
return(ER_OUT_OF_RESOURCES);
thd->client_capabilities=uint2korr(net->read_pos);
if (thd->client_capabilities & CLIENT_IGNORE_SPACE)
thd->sql_mode|= MODE_IGNORE_SPACE;
#ifdef HAVE_OPENSSL
DBUG_PRINT("info", ("client capabilities: %d", thd->client_capabilities));
if (thd->client_capabilities & CLIENT_SSL)
{
/* Do the SSL layering. */
DBUG_PRINT("info", ("IO layer change in progress..."));
sslaccept(ssl_acceptor_fd, net->vio, thd->variables.net_wait_timeout);
DBUG_PRINT("info", ("Reading user information over SSL layer"));
if ((pkt_len=my_net_read(net)) == packet_error ||
pkt_len < NORMAL_HANDSHAKE_SIZE)
{
DBUG_PRINT("error", ("Failed to read user information (pkt_len= %lu)",
pkt_len));
inc_host_errors(&thd->remote.sin_addr);
return(ER_HANDSHAKE_ERROR);
}
}
else
{
DBUG_PRINT("info", ("Leaving IO layer intact"));
if (pkt_len < NORMAL_HANDSHAKE_SIZE)
{
inc_host_errors(&thd->remote.sin_addr);
return ER_HANDSHAKE_ERROR;
}
}
#endif
thd->max_client_packet_length=uint3korr(net->read_pos+2);
char *user= (char*) net->read_pos+5;
char *passwd= strend(user)+1;
char *db=0;
if (passwd[0] && strlen(passwd) != SCRAMBLE_LENGTH)
return ER_HANDSHAKE_ERROR;
if (thd->client_capabilities & CLIENT_CONNECT_WITH_DB)
db=strend(passwd)+1;
if (thd->client_capabilities & CLIENT_INTERACTIVE)
thd->variables.net_wait_timeout= thd->variables.net_interactive_timeout;
if ((thd->client_capabilities & CLIENT_TRANSACTIONS) &&
opt_using_transactions)
thd->net.return_status= &thd->server_status;
net->read_timeout=(uint) thd->variables.net_read_timeout;
if (check_user(thd,COM_CONNECT, user, passwd, db, 1))
return (-1);
thd->password=test(passwd[0]);
return 0;
}
pthread_handler_decl(handle_one_connection,arg)
{
THD *thd=(THD*) arg;
uint launch_time =
(uint) ((thd->thr_create_time = time(NULL)) - thd->connect_time);
if (launch_time >= slow_launch_time)
statistic_increment(slow_launch_threads,&LOCK_status );
pthread_detach_this_thread();
#if !defined( __WIN__) && !defined(OS2) // Win32 calls this in pthread_create
// The following calls needs to be done before we call DBUG_ macros
if (!(test_flags & TEST_NO_THREADS) & my_thread_init())
{
close_connection(&thd->net,ER_OUT_OF_RESOURCES);
statistic_increment(aborted_connects,&LOCK_status);
end_thread(thd,0);
return 0;
}
#endif
/*
handle_one_connection() is the only way a thread would start
and would always be on top of the stack, therefore, the thread
stack always starts at the address of the first local variable
of handle_one_connection, which is thd. We need to know the
start of the stack so that we could check for stack overruns.
*/
DBUG_PRINT("info", ("handle_one_connection called by thread %d\n",
thd->thread_id));
// now that we've called my_thread_init(), it is safe to call DBUG_*
#if defined(__WIN__)
init_signals(); // IRENA; testing ?
#elif !defined(OS2)
sigset_t set;
VOID(sigemptyset(&set)); // Get mask in use
VOID(pthread_sigmask(SIG_UNBLOCK,&set,&thd->block_signals));
#endif
if (thd->store_globals())
{
close_connection(&thd->net,ER_OUT_OF_RESOURCES);
statistic_increment(aborted_connects,&LOCK_status);
end_thread(thd,0);
return 0;
}
do
{
int error;
NET *net= &thd->net;
thd->thread_stack= (char*) &thd;
if ((error=check_connections(thd)))
{ // Wrong permissions
if (error > 0)
net_printf(thd,error,thd->host_or_ip);
#ifdef __NT__
if (vio_type(net->vio) == VIO_TYPE_NAMEDPIPE)
sleep(1); /* must wait after eof() */
#endif
statistic_increment(aborted_connects,&LOCK_status);
goto end_thread;
}
if ((ulong) thd->variables.max_join_size == (ulonglong) HA_POS_ERROR)
thd->options |= OPTION_BIG_SELECTS;
if (thd->client_capabilities & CLIENT_COMPRESS)
net->compress=1; // Use compression
thd->proc_info=0; // Remove 'login'
thd->command=COM_SLEEP;
thd->version=refresh_version;
thd->set_time();
init_sql_alloc(&thd->mem_root, MEM_ROOT_BLOCK_SIZE, MEM_ROOT_PREALLOC);
init_sql_alloc(&thd->transaction.mem_root,
TRANS_MEM_ROOT_BLOCK_SIZE, TRANS_MEM_ROOT_PREALLOC);
while (!net->error && net->vio != 0 && !thd->killed)
{
if (do_command(thd))
break;
}
if (thd->user_connect)
decrease_user_connections(thd->user_connect);
free_root(&thd->mem_root,MYF(0));
if (net->error && net->vio != 0 && net->report_error)
{
if (!thd->killed && thd->variables.log_warnings)
sql_print_error(ER(ER_NEW_ABORTING_CONNECTION),
thd->thread_id,(thd->db ? thd->db : "unconnected"),
thd->user ? thd->user : "unauthenticated",
thd->host_or_ip,
(net->last_errno ? ER(net->last_errno) :
ER(ER_UNKNOWN_ERROR)));
send_error(thd,net->last_errno,NullS);
thread_safe_increment(aborted_threads,&LOCK_status);
}
end_thread:
close_connection(net);
end_thread(thd,1);
/*
If end_thread returns, we are either running with --one-thread
or this thread has been schedule to handle the next query
*/
thd= current_thd;
} while (!(test_flags & TEST_NO_THREADS));
/* The following is only executed if we are not using --one-thread */
return(0); /* purecov: deadcode */
}
/*
Execute commands from bootstrap_file.
Used when creating the initial grant tables
*/
pthread_handler_decl(handle_bootstrap,arg)
{
THD *thd=(THD*) arg;
FILE *file=bootstrap_file;
char *buff;
/* The following must be called before DBUG_ENTER */
if (my_thread_init() || thd->store_globals())
{
close_connection(&thd->net,ER_OUT_OF_RESOURCES);
thd->fatal_error=1;
goto end;
}
DBUG_ENTER("handle_bootstrap");
pthread_detach_this_thread();
thd->thread_stack= (char*) &thd;
#if !defined(__WIN__) && !defined(OS2)
sigset_t set;
VOID(sigemptyset(&set)); // Get mask in use
VOID(pthread_sigmask(SIG_UNBLOCK,&set,&thd->block_signals));
#endif
if ((ulong) thd->variables.max_join_size == (ulonglong) HA_POS_ERROR)
thd->options |= OPTION_BIG_SELECTS;
thd->proc_info=0;
thd->version=refresh_version;
thd->priv_user=thd->user=(char*) my_strdup("boot", MYF(MY_WME));
buff= (char*) thd->net.buff;
init_sql_alloc(&thd->mem_root, MEM_ROOT_BLOCK_SIZE, MEM_ROOT_PREALLOC);
init_sql_alloc(&thd->transaction.mem_root,
TRANS_MEM_ROOT_BLOCK_SIZE, TRANS_MEM_ROOT_PREALLOC);
while (fgets(buff, thd->net.max_packet, file))
{
uint length=(uint) strlen(buff);
while (length && (my_isspace(system_charset_info, buff[length-1]) ||
buff[length-1] == ';'))
length--;
buff[length]=0;
thd->current_tablenr=0;
thd->query_length=length;
thd->query= thd->memdup_w_gap(buff, length+1, thd->db_length+1);
thd->query[length] = '\0';
thd->query_id=query_id++;
if (mqh_used && thd->user_connect && check_mqh(thd, SQLCOM_END))
{
thd->net.error = 0;
close_thread_tables(thd); // Free tables
free_root(&thd->mem_root,MYF(MY_KEEP_PREALLOC));
break;
}
mysql_parse(thd,thd->query,length);
close_thread_tables(thd); // Free tables
if (thd->fatal_error)
break;
free_root(&thd->mem_root,MYF(MY_KEEP_PREALLOC));
free_root(&thd->transaction.mem_root,MYF(MY_KEEP_PREALLOC));
}
/* thd->fatal_error should be set in case something went wrong */
end:
(void) pthread_mutex_lock(&LOCK_thread_count);
thread_count--;
(void) pthread_mutex_unlock(&LOCK_thread_count);
(void) pthread_cond_broadcast(&COND_thread_count);
my_thread_end();
pthread_exit(0);
DBUG_RETURN(0); // Never reached
}
/* This works because items are allocated with sql_alloc() */
void free_items(Item *item)
{
for (; item ; item=item->next)
delete item;
}
int mysql_table_dump(THD* thd, char* db, char* tbl_name, int fd)
{
TABLE* table;
TABLE_LIST* table_list;
int error = 0;
DBUG_ENTER("mysql_table_dump");
db = (db && db[0]) ? db : thd->db;
if (!(table_list = (TABLE_LIST*) thd->calloc(sizeof(TABLE_LIST))))
DBUG_RETURN(1); // out of memory
table_list->db = db;
table_list->real_name = table_list->alias = tbl_name;
table_list->lock_type = TL_READ_NO_INSERT;
table_list->next = 0;
remove_escape(table_list->real_name);
if (!(table=open_ltable(thd, table_list, TL_READ_NO_INSERT)))
DBUG_RETURN(1);
if (!db || check_db_name(db))
{
net_printf(thd,ER_WRONG_DB_NAME, db ? db : "NULL");
goto err;
}
if (check_access(thd, SELECT_ACL, db, &table_list->grant.privilege))
goto err;
if (grant_option && check_grant(thd, SELECT_ACL, table_list))
goto err;
thd->free_list = 0;
thd->query_length=(uint) strlen(tbl_name);
thd->query = tbl_name;
if ((error = mysqld_dump_create_info(thd, table, -1)))
{
my_error(ER_GET_ERRNO, MYF(0));
goto err;
}
net_flush(&thd->net);
if ((error = table->file->dump(thd,fd)))
my_error(ER_GET_ERRNO, MYF(0));
err:
close_thread_tables(thd);
DBUG_RETURN(error);
}
/* Execute one command from socket (query or simple command) */
bool do_command(THD *thd)
{
char *packet;
uint old_timeout;
ulong packet_length;
NET *net;
enum enum_server_command command;
DBUG_ENTER("do_command");
net= &thd->net;
thd->current_tablenr=0;
packet=0;
old_timeout=net->read_timeout;
// Wait max for 8 hours
net->read_timeout=(uint) thd->variables.net_wait_timeout;
thd->clear_error(); // Clear error message
net_new_transaction(net);
if ((packet_length=my_net_read(net)) == packet_error)
{
DBUG_PRINT("info",("Got error reading command from socket %s",
vio_description(net->vio) ));
return TRUE;
}
else
{
packet=(char*) net->read_pos;
command = (enum enum_server_command) (uchar) packet[0];
DBUG_PRINT("info",("Command on %s = %d (%s)",
vio_description(net->vio), command,
command_name[command]));
}
net->read_timeout=old_timeout; // restore it
DBUG_RETURN(dispatch_command(command,thd, packet+1, (uint) packet_length));
}
bool dispatch_command(enum enum_server_command command, THD *thd,
char* packet, uint packet_length)
{
NET *net= &thd->net;
bool error=0;
/*
Commands which will always take a long time should be marked with
this so that they will not get logged to the slow query log
*/
bool slow_command=FALSE;
DBUG_ENTER("dispatch_command");
thd->command=command;
thd->set_time();
VOID(pthread_mutex_lock(&LOCK_thread_count));
thd->query_id=query_id;
if (command != COM_STATISTICS && command != COM_PING)
query_id++;
thread_running++;
VOID(pthread_mutex_unlock(&LOCK_thread_count));
thd->lex.select_lex.options=0; // We store status here
switch (command) {
case COM_INIT_DB:
thread_safe_increment(com_stat[SQLCOM_CHANGE_DB],&LOCK_status);
if (!mysql_change_db(thd,packet))
mysql_log.write(thd,command,"%s",thd->db);
break;
case COM_REGISTER_SLAVE:
{
if (!register_slave(thd, (uchar*)packet, packet_length))
send_ok(thd);
break;
}
case COM_TABLE_DUMP:
{
thread_safe_increment(com_other, &LOCK_status);
slow_command = TRUE;
uint db_len = *(uchar*)packet;
uint tbl_len = *(uchar*)(packet + db_len + 1);
char* db = thd->alloc(db_len + tbl_len + 2);
memcpy(db, packet + 1, db_len);
char* tbl_name = db + db_len;
*tbl_name++ = 0;
memcpy(tbl_name, packet + db_len + 2, tbl_len);
tbl_name[tbl_len] = 0;
if (mysql_table_dump(thd, db, tbl_name, -1))
send_error(thd); // dump to NET
break;
}
case COM_CHANGE_USER:
{
thread_safe_increment(com_other,&LOCK_status);
char *user= (char*) packet;
char *passwd= strend(user)+1;
char *db= strend(passwd)+1;
/* Save user and privileges */
uint save_master_access=thd->master_access;
uint save_db_access= thd->db_access;
uint save_db_length= thd->db_length;
char *save_user= thd->user;
char *save_priv_user= thd->priv_user;
char *save_db= thd->db;
USER_CONN *save_uc= thd->user_connect;
if ((uint) ((uchar*) db - net->read_pos) > packet_length)
{ // Check if protocol is ok
send_error(thd, ER_UNKNOWN_COM_ERROR);
break;
}
if (check_user(thd, COM_CHANGE_USER, user, passwd, db, 0))
{ // Restore old user
x_free(thd->user);
x_free(thd->db);
thd->master_access=save_master_access;
thd->db_access=save_db_access;
thd->db=save_db;
thd->db_length=save_db_length;
thd->user=save_user;
thd->priv_user=save_priv_user;
break;
}
if (max_connections && save_uc)
decrease_user_connections(save_uc);
x_free((gptr) save_db);
x_free((gptr) save_user);
thd->password=test(passwd[0]);
break;
}
case COM_EXECUTE:
{
mysql_stmt_execute(thd, packet);
break;
}
case COM_LONG_DATA:
{
mysql_stmt_get_longdata(thd, packet, packet_length);
break;
}
case COM_PREPARE:
{
mysql_stmt_prepare(thd, packet, packet_length);
break;
}
case COM_QUERY:
{
if (alloc_query(thd, packet, packet_length))
break; // fatal error is set
mysql_log.write(thd,command,"%s",thd->query);
DBUG_PRINT("query",("%s",thd->query));
mysql_parse(thd,thd->query, thd->query_length);
if (!(specialflag & SPECIAL_NO_PRIOR))
my_pthread_setprio(pthread_self(),WAIT_PRIOR);
DBUG_PRINT("info",("query ready"));
break;
}
case COM_FIELD_LIST: // This isn't actually needed
#ifdef DONT_ALLOW_SHOW_COMMANDS
send_error(thd,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
break;
#else
{
char *fields;
TABLE_LIST table_list;
thread_safe_increment(com_stat[SQLCOM_SHOW_FIELDS],&LOCK_status);
bzero((char*) &table_list,sizeof(table_list));
if (!(table_list.db=thd->db))
{
send_error(thd,ER_NO_DB_ERROR);
break;
}
thd->free_list=0;
table_list.alias= table_list.real_name= thd->strdup(packet);
packet=strend(packet)+1;
// command not cachable => no gap for data base name
if (!(thd->query=fields=thd->memdup(packet,thd->query_length+1)))
break;
mysql_log.write(thd,command,"%s %s",table_list.real_name,fields);
remove_escape(table_list.real_name); // This can't have wildcards
if (check_access(thd,SELECT_ACL,table_list.db,&thd->col_access))
break;
table_list.grant.privilege=thd->col_access;
if (grant_option && check_grant(thd,SELECT_ACL,&table_list,2))
break;
mysqld_list_fields(thd,&table_list,fields);
free_items(thd->free_list);
break;
}
#endif
case COM_QUIT:
/* We don't calculate statistics for this command */
mysql_log.write(thd,command,NullS);
net->error=0; // Don't give 'abort' message
error=TRUE; // End server
break;
case COM_CREATE_DB: // QQ: To be removed
{
thread_safe_increment(com_stat[SQLCOM_CREATE_DB],&LOCK_status);
char *db=thd->strdup(packet);
// null test to handle EOM
if (!db || !strip_sp(db) || check_db_name(db))
{
net_printf(thd,ER_WRONG_DB_NAME, db ? db : "NULL");
break;
}
if (lower_case_table_names)
my_casedn_str(system_charset_info, db);
if (check_access(thd,CREATE_ACL,db,0,1))
break;
mysql_log.write(thd,command,packet);
mysql_create_db(thd,db,0,0);
break;
}
case COM_DROP_DB: // QQ: To be removed
{
thread_safe_increment(com_stat[SQLCOM_DROP_DB],&LOCK_status);
char *db=thd->strdup(packet);
// null test to handle EOM
if (!db || !strip_sp(db) || check_db_name(db))
{
net_printf(thd,ER_WRONG_DB_NAME, db ? db : "NULL");
break;
}
if (lower_case_table_names)
my_casedn_str(system_charset_info, db);
if (thd->locked_tables || thd->active_transaction())
{
send_error(thd,ER_LOCK_OR_ACTIVE_TRANSACTION);
break;
}
mysql_log.write(thd,command,db);
mysql_rm_db(thd,db,0,0);
break;
}
case COM_BINLOG_DUMP:
{
thread_safe_increment(com_other,&LOCK_status);
slow_command = TRUE;
if (check_global_access(thd, REPL_SLAVE_ACL))
break;
mysql_log.write(thd,command, 0);
ulong pos;
ushort flags;
uint32 slave_server_id;
/* TODO: The following has to be changed to an 8 byte integer */
pos = uint4korr(packet);
flags = uint2korr(packet + 4);
thd->server_id=0; /* avoid suicide */
kill_zombie_dump_threads(slave_server_id = uint4korr(packet+6));
thd->server_id = slave_server_id;
mysql_binlog_send(thd, thd->strdup(packet + 10), (my_off_t) pos, flags);
unregister_slave(thd,1,1);
// fake COM_QUIT -- if we get here, the thread needs to terminate
error = TRUE;
net->error = 0;
break;
}
case COM_REFRESH:
{
thread_safe_increment(com_stat[SQLCOM_FLUSH],&LOCK_status);
ulong options= (ulong) (uchar) packet[0];
if (check_global_access(thd,RELOAD_ACL))
break;
mysql_log.write(thd,command,NullS);
if (reload_acl_and_cache(thd, options, (TABLE_LIST*) 0))
send_error(thd,0);
else
send_eof(thd);
break;
}
case COM_SHUTDOWN:
thread_safe_increment(com_other,&LOCK_status);
if (check_global_access(thd,SHUTDOWN_ACL))
break; /* purecov: inspected */
DBUG_PRINT("quit",("Got shutdown command"));
mysql_log.write(thd,command,NullS);
send_eof(thd);
#ifdef __WIN__
sleep(1); // must wait after eof()
#endif
#ifndef OS2
send_eof(thd); // This is for 'quit request'
#endif
close_connection(net);
close_thread_tables(thd); // Free before kill
free_root(&thd->mem_root,MYF(0));
free_root(&thd->transaction.mem_root,MYF(0));
kill_mysql();
error=TRUE;
break;
case COM_STATISTICS:
{
mysql_log.write(thd,command,NullS);
thread_safe_increment(com_stat[SQLCOM_SHOW_STATUS],&LOCK_status);
char buff[200];
ulong uptime = (ulong) (thd->start_time - start_time);
sprintf((char*) buff,
"Uptime: %ld Threads: %d Questions: %lu Slow queries: %ld Opens: %ld Flush tables: %ld Open tables: %u Queries per second avg: %.3f",
uptime,
(int) thread_count,thd->query_id,long_query_count,
opened_tables,refresh_version, cached_tables(),
uptime ? (float)thd->query_id/(float)uptime : 0);
#ifdef SAFEMALLOC
if (lCurMemory) // Using SAFEMALLOC
sprintf(strend(buff), " Memory in use: %ldK Max memory used: %ldK",
(lCurMemory+1023L)/1024L,(lMaxMemory+1023L)/1024L);
#endif
VOID(my_net_write(net, buff,(uint) strlen(buff)));
VOID(net_flush(net));
break;
}
case COM_PING:
thread_safe_increment(com_other,&LOCK_status);
send_ok(thd); // Tell client we are alive
break;
case COM_PROCESS_INFO:
thread_safe_increment(com_stat[SQLCOM_SHOW_PROCESSLIST],&LOCK_status);
if (!thd->priv_user[0] && check_global_access(thd,PROCESS_ACL))
break;
mysql_log.write(thd,command,NullS);
mysqld_list_processes(thd,thd->master_access & PROCESS_ACL ? NullS :
thd->priv_user,0);
break;
case COM_PROCESS_KILL:
{
thread_safe_increment(com_stat[SQLCOM_KILL],&LOCK_status);
ulong id=(ulong) uint4korr(packet);
kill_one_thread(thd,id);
break;
}
case COM_DEBUG:
thread_safe_increment(com_other,&LOCK_status);
if (check_global_access(thd, SUPER_ACL))
break; /* purecov: inspected */
mysql_print_status(thd);
mysql_log.write(thd,command,NullS);
send_eof(thd);
break;
case COM_SLEEP:
case COM_CONNECT: // Impossible here
case COM_TIME: // Impossible from client
case COM_DELAYED_INSERT:
default:
send_error(thd, ER_UNKNOWN_COM_ERROR);
break;
}
if (thd->lock || thd->open_tables)
{
thd->proc_info="closing tables";
close_thread_tables(thd); /* Free tables */
}
if (thd->fatal_error)
send_error(thd,0); // End of memory ?
time_t start_of_query=thd->start_time;
thd->end_time(); // Set start time
/* If not reading from backup and if the query took too long */
if (!slow_command && !thd->user_time) // do not log 'slow_command' queries
{
thd->proc_info="logging slow query";
if ((ulong) (thd->start_time - thd->time_after_lock) >
thd->variables.long_query_time ||
((thd->lex.select_lex.options &
(QUERY_NO_INDEX_USED | QUERY_NO_GOOD_INDEX_USED)) &&
(specialflag & SPECIAL_LONG_LOG_FORMAT)))
{
long_query_count++;
mysql_slow_log.write(thd, thd->query, thd->query_length, start_of_query);
}
}
thd->proc_info="cleaning up";
VOID(pthread_mutex_lock(&LOCK_thread_count)); // For process list
thd->proc_info=0;
thd->command=COM_SLEEP;
thd->query=0;
thread_running--;
VOID(pthread_mutex_unlock(&LOCK_thread_count));
thd->packet.shrink(thd->variables.net_buffer_length); // Reclaim some memory
free_root(&thd->mem_root,MYF(MY_KEEP_PREALLOC));
DBUG_RETURN(error);
}
/*
Read query from packet and store in thd->query
Used in COM_QUERY and COM_PREPARE
DESCRIPTION
Sets the following THD variables:
query
query_length
RETURN VALUES
0 ok
1 error; In this case thd->fatal_error is set
*/
bool alloc_query(THD *thd, char *packet, ulong packet_length)
{
packet_length--; // Remove end null
/* Remove garage at start and end of query */
while (my_isspace(system_charset_info,packet[0]) && packet_length > 0)
{
packet++;
packet_length--;
}
char *pos=packet+packet_length; // Point at end null
while (packet_length > 0 &&
(pos[-1] == ';' || my_isspace(system_charset_info,pos[-1])))
{
pos--;
packet_length--;
}
/* We must allocate some extra memory for query cache */
if (!(thd->query= (char*) thd->memdup_w_gap((gptr) (packet),
packet_length,
thd->db_length+2)))
return 1;
thd->query[packet_length]=0;
thd->query_length= packet_length;
thd->packet.shrink(thd->variables.net_buffer_length);// Reclaim some memory
if (!(specialflag & SPECIAL_NO_PRIOR))
my_pthread_setprio(pthread_self(),QUERY_PRIOR);
return 0;
}
/****************************************************************************
** mysql_execute_command
** Execute command saved in thd and current_lex->sql_command
****************************************************************************/
void
mysql_execute_command(THD *thd)
{
int res= 0;
LEX *lex= &thd->lex;
TABLE_LIST *tables= (TABLE_LIST*) lex->select_lex.table_list.first;
TABLE_LIST *cursor;
SELECT_LEX *select_lex= &lex->select_lex;
SELECT_LEX_UNIT *unit= &lex->unit;
DBUG_ENTER("mysql_execute_command");
/*
Reset warning count for each query that uses tables
A better approach would be to reset this for any commands
that is not a SHOW command or a select that only access local
variables, but for now this is probably good enough.
*/
if (tables)
mysql_reset_errors(thd);
/*
Save old warning count to be able to send to client how many warnings we
got
*/
thd->old_total_warn_count= thd->total_warn_count;
thd->net.report_error= 0;
if (thd->slave_thread)
{
/*
Skip if we are in the slave thread, some table rules have been
given and the table list says the query should not be replicated
*/
if (table_rules_on && tables && !tables_ok(thd,tables))
DBUG_VOID_RETURN;
#ifndef TO_BE_DELETED
/*
This is a workaround to deal with the shortcoming in 3.23.44-3.23.46
masters in RELEASE_LOCK() logging. We re-write SELECT RELEASE_LOCK()
as DO RELEASE_LOCK()
*/
if (lex->sql_command == SQLCOM_SELECT)
{
lex->sql_command = SQLCOM_DO;
lex->insert_list = &select_lex->item_list;
}
#endif
}
/*
TODO: make derived tables processing 'inside' SELECT processing.
TODO: solve problem with depended derived tables in subselects
*/
if (lex->derived_tables)
{
for (TABLE_LIST *cursor= tables;
cursor;
cursor= cursor->next)
if (cursor->derived && (res=mysql_derived(thd, lex,
(SELECT_LEX_UNIT *)cursor->derived,
cursor)))
{
if (res < 0)
send_error(thd,thd->killed ? ER_SERVER_SHUTDOWN : 0);
DBUG_VOID_RETURN;
}
}
if ((lex->select_lex.next_select_in_list() &&
lex->unit.create_total_list(thd, lex, &tables)) ||
(table_rules_on && tables && thd->slave_thread &&
!tables_ok(thd,tables)))
DBUG_VOID_RETURN;
thread_safe_increment(com_stat[lex->sql_command],&LOCK_status);
switch (lex->sql_command) {
case SQLCOM_SELECT:
{
select_result *result=lex->result;
if (tables)
{
res=check_table_access(thd,
lex->exchange ? SELECT_ACL | FILE_ACL :
SELECT_ACL,
tables);
}
else
res=check_access(thd, lex->exchange ? SELECT_ACL | FILE_ACL : SELECT_ACL,
any_db);
if (res)
{
res=0;
break; // Error message is given
}
unit->offset_limit_cnt= (ha_rows) unit->global_parameters->offset_limit;
unit->select_limit_cnt= (ha_rows) (unit->global_parameters->select_limit+
unit->global_parameters->offset_limit);
if (unit->select_limit_cnt <
(ha_rows) unit->global_parameters->select_limit)
unit->select_limit_cnt= HA_POS_ERROR; // no limit
if (unit->select_limit_cnt == HA_POS_ERROR)
select_lex->options&= ~OPTION_FOUND_ROWS;
if (!(res=open_and_lock_tables(thd,tables)))
{
if (lex->describe)
{
if (!(result= new select_send()))
{
send_error(thd, ER_OUT_OF_RESOURCES);
DBUG_VOID_RETURN;
}
else
thd->send_explain_fields(result);
fix_tables_pointers(select_lex);
res= mysql_explain_union(thd, &thd->lex.unit, result);
MYSQL_LOCK *save_lock= thd->lock;
thd->lock= (MYSQL_LOCK *)0;
result->send_eof();
thd->lock= save_lock;
}
else
{
if (!result)
{
if ((result=new select_send()))
{
/*
Normal select:
Change lock if we are using SELECT HIGH PRIORITY,
FOR UPDATE or IN SHARE MODE
*/
TABLE_LIST *table;
for (table = tables ; table ; table=table->next)
table->lock_type= lex->lock_option;
}
else
{
res= -1;
#ifdef DELETE_ITEMS
delete select_lex->having;
delete select_lex->where;
#endif
break;
}
}
query_cache_store_query(thd, tables);
res=handle_select(thd, lex, result);
}
}
break;
}
case SQLCOM_DO:
res=mysql_do(thd, *lex->insert_list);
break;
case SQLCOM_EMPTY_QUERY:
send_ok(thd);
break;
case SQLCOM_HELP:
res= mysqld_help(thd,lex->help_arg);
break;
case SQLCOM_PURGE:
{
if (check_global_access(thd, SUPER_ACL))
goto error;
res = purge_master_logs(thd, lex->to_log);
break;
}
case SQLCOM_SHOW_WARNS:
{
res= mysqld_show_warnings(thd, (ulong)
((1L << (uint) MYSQL_ERROR::WARN_LEVEL_NOTE) |
(1L << (uint) MYSQL_ERROR::WARN_LEVEL_WARN)));
break;
}
case SQLCOM_SHOW_ERRORS:
{
res= mysqld_show_warnings(thd, (ulong)
(1L << (uint) MYSQL_ERROR::WARN_LEVEL_ERROR));
break;
}
case SQLCOM_SHOW_NEW_MASTER:
{
if (check_global_access(thd, REPL_SLAVE_ACL))
goto error;
#ifndef WORKING_NEW_MASTER
net_printf(thd, ER_NOT_SUPPORTED_YET, "SHOW NEW MASTER");
res= 1;
#else
res = show_new_master(thd);
#endif
break;
}
case SQLCOM_SHOW_SLAVE_HOSTS:
{
if (check_global_access(thd, REPL_SLAVE_ACL))
goto error;
res = show_slave_hosts(thd);
break;
}
case SQLCOM_SHOW_BINLOG_EVENTS:
{
if (check_global_access(thd, REPL_SLAVE_ACL))
goto error;
res = show_binlog_events(thd);
break;
}
case SQLCOM_BACKUP_TABLE:
{
if (check_db_used(thd,tables) ||
check_table_access(thd,SELECT_ACL, tables) ||
check_global_access(thd, FILE_ACL))
goto error; /* purecov: inspected */
res = mysql_backup_table(thd, tables);
break;
}
case SQLCOM_RESTORE_TABLE:
{
if (check_db_used(thd,tables) ||
check_table_access(thd, INSERT_ACL, tables) ||
check_global_access(thd, FILE_ACL))
goto error; /* purecov: inspected */
res = mysql_restore_table(thd, tables);
break;
}
case SQLCOM_CHANGE_MASTER:
{
if (check_global_access(thd, SUPER_ACL))
goto error;
LOCK_ACTIVE_MI;
res = change_master(thd,active_mi);
UNLOCK_ACTIVE_MI;
break;
}
case SQLCOM_SHOW_SLAVE_STAT:
{
if (check_global_access(thd, SUPER_ACL))
goto error;
LOCK_ACTIVE_MI;
res = show_master_info(thd,active_mi);
UNLOCK_ACTIVE_MI;
break;
}
case SQLCOM_SHOW_MASTER_STAT:
{
if (check_global_access(thd, SUPER_ACL))
goto error;
res = show_binlog_info(thd);
break;
}
case SQLCOM_LOAD_MASTER_DATA: // sync with master
if (check_global_access(thd, SUPER_ACL))
goto error;
if (end_active_trans(thd))
res= -1;
else
res = load_master_data(thd);
break;
#ifdef HAVE_INNOBASE_DB
case SQLCOM_SHOW_INNODB_STATUS:
{
if (check_global_access(thd, SUPER_ACL))
goto error;
res = innodb_show_status(thd);
break;
}
#endif
case SQLCOM_LOAD_MASTER_TABLE:
{
if (!tables->db)
tables->db=thd->db;
if (check_access(thd,CREATE_ACL,tables->db,&tables->grant.privilege))
goto error; /* purecov: inspected */
if (grant_option)
{
/* Check that the first table has CREATE privilege */
TABLE_LIST *tmp_table_list=tables->next;
tables->next=0;
bool error=check_grant(thd,CREATE_ACL,tables);
tables->next=tmp_table_list;
if (error)
goto error;
}
if (strlen(tables->real_name) > NAME_LEN)
{
net_printf(thd,ER_WRONG_TABLE_NAME,tables->real_name);
break;
}
LOCK_ACTIVE_MI;
// fetch_master_table will send the error to the client on failure
if (!fetch_master_table(thd, tables->db, tables->real_name,
active_mi, 0))
{
send_ok(thd);
}
UNLOCK_ACTIVE_MI;
break;
}
case SQLCOM_CREATE_TABLE:
{
ulong want_priv= ((lex->create_info.options & HA_LEX_CREATE_TMP_TABLE) ?
CREATE_TMP_ACL : CREATE_ACL);
if (!tables->db)
tables->db=thd->db;
if (check_access(thd,want_priv,tables->db,&tables->grant.privilege) ||
check_merge_table_access(thd, tables->db,
(TABLE_LIST *)
lex->create_info.merge_list.first))
goto error; /* purecov: inspected */
if (grant_option && want_priv != CREATE_TMP_ACL)
{
/* Check that the first table has CREATE privilege */
TABLE_LIST *tmp_table_list=tables->next;
tables->next=0;
bool error=check_grant(thd, want_priv, tables);
tables->next=tmp_table_list;
if (error)
goto error;
}
if (strlen(tables->real_name) > NAME_LEN)
{
net_printf(thd, ER_WRONG_TABLE_NAME, tables->alias);
res=0;
break;
}
#ifndef HAVE_READLINK
lex->create_info.data_file_name=lex->create_info.index_file_name=0;
#else
/* Fix names if symlinked tables */
if (append_file_to_dir(thd, &lex->create_info.data_file_name,
tables->real_name) ||
append_file_to_dir(thd,&lex->create_info.index_file_name,
tables->real_name))
{
res=-1;
break;
}
#endif
if (select_lex->item_list.elements) // With select
{
select_result *result;
if (!(lex->create_info.options & HA_LEX_CREATE_TMP_TABLE) &&
check_dup(tables->db, tables->real_name, tables->next))
{
net_printf(thd,ER_INSERT_TABLE_USED,tables->real_name);
DBUG_VOID_RETURN;
}
if (tables->next)
{
TABLE_LIST *table;
if (check_table_access(thd, SELECT_ACL, tables->next))
goto error; // Error message is given
for (table = tables->next ; table ; table=table->next)
table->lock_type= lex->lock_option;
}
unit->offset_limit_cnt= select_lex->offset_limit;
unit->select_limit_cnt= select_lex->select_limit+
select_lex->offset_limit;
if (unit->select_limit_cnt < select_lex->select_limit)
unit->select_limit_cnt= HA_POS_ERROR; // No limit
/* Skip first table, which is the table we are creating */
lex->select_lex.table_list.first=
(byte*) (((TABLE_LIST *) lex->select_lex.table_list.first)->next);
if (!(res=open_and_lock_tables(thd,tables->next)))
{
if ((result=new select_create(tables->db ? tables->db : thd->db,
tables->real_name, &lex->create_info,
lex->create_list,
lex->key_list,
select_lex->item_list,lex->duplicates)))
res=handle_select(thd, lex, result);
else
res= -1;
}
}
else // regular create
{
res = mysql_create_table(thd,tables->db ? tables->db : thd->db,
tables->real_name, &lex->create_info,
lex->create_list,
lex->key_list,0,0,0); // do logging
if (!res)
send_ok(thd);
}
break;
}
case SQLCOM_CREATE_INDEX:
if (!tables->db)
tables->db=thd->db;
if (check_access(thd,INDEX_ACL,tables->db,&tables->grant.privilege))
goto error; /* purecov: inspected */
if (grant_option && check_grant(thd,INDEX_ACL,tables))
goto error;
if (end_active_trans(thd))
res= -1;
else
res = mysql_create_index(thd, tables, lex->key_list);
break;
case SQLCOM_SLAVE_START:
{
LOCK_ACTIVE_MI;
start_slave(thd,active_mi,1 /* net report*/);
UNLOCK_ACTIVE_MI;
break;
}
case SQLCOM_SLAVE_STOP:
{
LOCK_ACTIVE_MI;
stop_slave(thd,active_mi,1/* net report*/);
UNLOCK_ACTIVE_MI;
break;
}
case SQLCOM_ALTER_TABLE:
#if defined(DONT_ALLOW_SHOW_COMMANDS)
send_error(thd,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
break;
#else
{
ulong priv=0;
if (lex->name && strlen(lex->name) > NAME_LEN)
{
net_printf(thd,ER_WRONG_TABLE_NAME,lex->name);
res=0;
break;
}
if (!tables->db)
tables->db=thd->db;
if (!select_lex->db)
select_lex->db=tables->db;
if (check_access(thd,ALTER_ACL,tables->db,&tables->grant.privilege) ||
check_access(thd,INSERT_ACL | CREATE_ACL,select_lex->db,&priv) ||
check_merge_table_access(thd, tables->db,
(TABLE_LIST *)
lex->create_info.merge_list.first))
goto error; /* purecov: inspected */
if (!tables->db)
tables->db=thd->db;
if (grant_option)
{
if (check_grant(thd,ALTER_ACL,tables))
goto error;
if (lex->name && !test_all_bits(priv,INSERT_ACL | CREATE_ACL))
{ // Rename of table
TABLE_LIST tmp_table;
bzero((char*) &tmp_table,sizeof(tmp_table));
tmp_table.real_name=lex->name;
tmp_table.db=select_lex->db;
tmp_table.grant.privilege=priv;
if (check_grant(thd,INSERT_ACL | CREATE_ACL,tables))
goto error;
}
}
/* Don't yet allow changing of symlinks with ALTER TABLE */
lex->create_info.data_file_name=lex->create_info.index_file_name=0;
/* ALTER TABLE ends previous transaction */
if (end_active_trans(thd))
res= -1;
else
{
res= mysql_alter_table(thd, select_lex->db, lex->name,
&lex->create_info,
tables, lex->create_list,
lex->key_list, lex->drop_list, lex->alter_list,
(ORDER *) select_lex->order_list.first,
lex->drop_primary, lex->duplicates,
lex->alter_keys_onoff, lex->simple_alter);
}
break;
}
#endif
case SQLCOM_RENAME_TABLE:
{
TABLE_LIST *table;
if (check_db_used(thd,tables))
goto error;
for (table=tables ; table ; table=table->next->next)
{
if (check_access(thd, ALTER_ACL | DROP_ACL, table->db,
&table->grant.privilege) ||
check_access(thd, INSERT_ACL | CREATE_ACL, table->next->db,
&table->next->grant.privilege))
goto error;
if (grant_option)
{
TABLE_LIST old_list,new_list;
old_list=table[0];
new_list=table->next[0];
old_list.next=new_list.next=0;
if (check_grant(thd,ALTER_ACL,&old_list) ||
(!test_all_bits(table->next->grant.privilege,
INSERT_ACL | CREATE_ACL) &&
check_grant(thd,INSERT_ACL | CREATE_ACL, &new_list)))
goto error;
}
}
query_cache_invalidate3(thd, tables, 0);
if (end_active_trans(thd))
res= -1;
else if (mysql_rename_tables(thd,tables))
res= -1;
break;
}
case SQLCOM_SHOW_BINLOGS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
send_error(thd,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
DBUG_VOID_RETURN;
#else
{
if (check_global_access(thd, SUPER_ACL))
goto error;
res = show_binlogs(thd);
break;
}
#endif
case SQLCOM_SHOW_CREATE:
#ifdef DONT_ALLOW_SHOW_COMMANDS
send_error(thd,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
DBUG_VOID_RETURN;
#else
{
if (check_db_used(thd, tables) ||
check_access(thd, SELECT_ACL | EXTRA_ACL, tables->db,
&tables->grant.privilege))
goto error;
res = mysqld_show_create(thd, tables);
break;
}
#endif
case SQLCOM_REPAIR:
{
if (check_db_used(thd,tables) ||
check_table_access(thd,SELECT_ACL | INSERT_ACL, tables))
goto error; /* purecov: inspected */
res = mysql_repair_table(thd, tables, &lex->check_opt);
break;
}
case SQLCOM_CHECK:
{
if (check_db_used(thd,tables) ||
check_table_access(thd, SELECT_ACL | EXTRA_ACL , tables))
goto error; /* purecov: inspected */
res = mysql_check_table(thd, tables, &lex->check_opt);
break;
}
case SQLCOM_ANALYZE:
{
if (check_db_used(thd,tables) ||
check_table_access(thd,SELECT_ACL | INSERT_ACL, tables))
goto error; /* purecov: inspected */
res = mysql_analyze_table(thd, tables, &lex->check_opt);
break;
}
case SQLCOM_OPTIMIZE:
{
HA_CREATE_INFO create_info;
if (check_db_used(thd,tables) ||
check_table_access(thd,SELECT_ACL | INSERT_ACL, tables))
goto error; /* purecov: inspected */
if (specialflag & (SPECIAL_SAFE_MODE | SPECIAL_NO_NEW_FUNC))
{
/* Use ALTER TABLE */
lex->create_list.empty();
lex->key_list.empty();
lex->col_list.empty();
lex->drop_list.empty();
lex->alter_list.empty();
bzero((char*) &create_info,sizeof(create_info));
create_info.db_type=DB_TYPE_DEFAULT;
create_info.row_type=ROW_TYPE_DEFAULT;
create_info.table_charset=default_charset_info;
res= mysql_alter_table(thd, NullS, NullS, &create_info,
tables, lex->create_list,
lex->key_list, lex->drop_list, lex->alter_list,
(ORDER *) 0,
0,DUP_ERROR);
}
else
res = mysql_optimize_table(thd, tables, &lex->check_opt);
break;
}
case SQLCOM_UPDATE:
if (check_access(thd,UPDATE_ACL,tables->db,&tables->grant.privilege))
goto error;
if (grant_option && check_grant(thd,UPDATE_ACL,tables))
goto error;
if (select_lex->item_list.elements != lex->value_list.elements)
{
send_error(thd,ER_WRONG_VALUE_COUNT);
DBUG_VOID_RETURN;
}
if (select_lex->table_list.elements == 1)
{
res = mysql_update(thd,tables,
select_lex->item_list,
lex->value_list,
select_lex->where,
(ORDER *) select_lex->order_list.first,
select_lex->select_limit,
lex->duplicates,
lex->lock_option);
#ifdef DELETE_ITEMS
delete select_lex->where;
#endif
}
else
{
multi_update *result;
uint table_count;
TABLE_LIST *auxi;
const char *msg=0;
lex->sql_command=SQLCOM_MULTI_UPDATE;
for (auxi=(TABLE_LIST*) tables, table_count=0 ; auxi ; auxi=auxi->next)
{
table_count++;
auxi->lock_type=TL_WRITE;
}
if (select_lex->order_list.elements)
msg="ORDER BY";
else if (select_lex->select_limit && select_lex->select_limit !=
HA_POS_ERROR)
msg="LIMIT";
if (msg)
{
net_printf(thd, ER_WRONG_USAGE, "UPDATE", msg);
res= 1;
break;
}
tables->grant.want_privilege=(SELECT_ACL & ~tables->grant.privilege);
if ((res=open_and_lock_tables(thd,tables)))
break;
unit->select_limit_cnt= HA_POS_ERROR;
if (!setup_fields(thd,tables,select_lex->item_list,1,0,0) &&
!setup_fields(thd,tables,lex->value_list,0,0,0) &&
!thd->fatal_error &&
(result=new multi_update(thd,tables,select_lex->item_list,
lex->duplicates, lex->lock_option,
table_count)))
{
List <Item> total_list;
List_iterator <Item> field_list(select_lex->item_list);
List_iterator <Item> value_list(lex->value_list);
Item *item;
while ((item=field_list++))
total_list.push_back(item);
while ((item=value_list++))
total_list.push_back(item);
res= mysql_select(thd, tables, total_list,
select_lex->where,
(ORDER *)NULL, (ORDER *)NULL, (Item *)NULL,
(ORDER *)NULL,
select_lex->options | thd->options |
SELECT_NO_JOIN_CACHE,
result, unit, select_lex, 0);
delete result;
}
else
res= -1; // Error is not sent
close_thread_tables(thd);
}
break;
case SQLCOM_INSERT:
if (check_access(thd,INSERT_ACL,tables->db,&tables->grant.privilege))
goto error; /* purecov: inspected */
if (grant_option && check_grant(thd,INSERT_ACL,tables))
goto error;
res = mysql_insert(thd,tables,lex->field_list,lex->many_values,
lex->duplicates,
lex->lock_option);
break;
case SQLCOM_REPLACE:
if (check_access(thd,INSERT_ACL | DELETE_ACL,
tables->db,&tables->grant.privilege))
goto error; /* purecov: inspected */
if (grant_option && check_grant(thd,INSERT_ACL | DELETE_ACL,
tables))
goto error;
res = mysql_insert(thd,tables,lex->field_list,lex->many_values,
DUP_REPLACE,
lex->lock_option);
break;
case SQLCOM_REPLACE_SELECT:
case SQLCOM_INSERT_SELECT:
{
/*
Check that we have modify privileges for the first table and
select privileges for the rest
*/
{
ulong privilege= (lex->sql_command == SQLCOM_INSERT_SELECT ?
INSERT_ACL : INSERT_ACL | DELETE_ACL);
TABLE_LIST *save_next=tables->next;
tables->next=0;
if (check_access(thd, privilege,
tables->db,&tables->grant.privilege) ||
(grant_option && check_grant(thd, privilege, tables)))
goto error;
tables->next=save_next;
if ((res=check_table_access(thd, SELECT_ACL, save_next)))
goto error;
}
select_result *result;
unit->offset_limit_cnt= select_lex->offset_limit;
unit->select_limit_cnt= select_lex->select_limit+select_lex->offset_limit;
if (unit->select_limit_cnt < select_lex->select_limit)
unit->select_limit_cnt= HA_POS_ERROR; // No limit
if (check_dup(tables->db, tables->real_name, tables->next))
{
net_printf(thd,ER_INSERT_TABLE_USED,tables->real_name);
DBUG_VOID_RETURN;
}
tables->lock_type=TL_WRITE; // update first table
{
TABLE_LIST *table;
for (table = tables->next ; table ; table=table->next)
table->lock_type= lex->lock_option;
}
/* Skip first table, which is the table we are inserting in */
lex->select_lex.table_list.first=
(byte*) (((TABLE_LIST *) lex->select_lex.table_list.first)->next);
if (!(res=open_and_lock_tables(thd, tables)))
{
if ((result=new select_insert(tables->table,&lex->field_list,
lex->duplicates)))
res=handle_select(thd,lex,result);
}
else
res= -1;
break;
}
case SQLCOM_TRUNCATE:
if (check_access(thd,DELETE_ACL,tables->db,&tables->grant.privilege))
goto error; /* purecov: inspected */
/*
Don't allow this within a transaction because we want to use
re-generate table
*/
if (thd->locked_tables || thd->active_transaction())
{
send_error(thd,ER_LOCK_OR_ACTIVE_TRANSACTION,NullS);
goto error;
}
res=mysql_truncate(thd,tables);
break;
case SQLCOM_DELETE:
{
if (check_access(thd,DELETE_ACL,tables->db,&tables->grant.privilege))
goto error; /* purecov: inspected */
if (grant_option && check_grant(thd,DELETE_ACL,tables))
goto error;
// Set privilege for the WHERE clause
tables->grant.want_privilege=(SELECT_ACL & ~tables->grant.privilege);
res = mysql_delete(thd,tables, select_lex->where,
(ORDER*) select_lex->order_list.first,
select_lex->select_limit, lex->lock_option,
select_lex->options);
break;
}
case SQLCOM_DELETE_MULTI:
{
TABLE_LIST *aux_tables=(TABLE_LIST *)thd->lex.auxilliary_table_list.first;
TABLE_LIST *auxi;
uint table_count=0;
multi_delete *result;
/* sql_yacc guarantees that tables and aux_tables are not zero */
if (check_db_used(thd, tables) || check_db_used(thd,aux_tables) ||
check_table_access(thd,SELECT_ACL, tables) ||
check_table_access(thd,DELETE_ACL, aux_tables))
goto error;
if ((thd->options & OPTION_SAFE_UPDATES) && !select_lex->where)
{
send_error(thd,ER_UPDATE_WITHOUT_KEY_IN_SAFE_MODE);
goto error;
}
for (auxi=(TABLE_LIST*) aux_tables ; auxi ; auxi=auxi->next)
{
table_count++;
/* All tables in aux_tables must be found in FROM PART */
TABLE_LIST *walk;
for (walk=(TABLE_LIST*) tables ; walk ; walk=walk->next)
{
if (!strcmp(auxi->real_name,walk->real_name) &&
!strcmp(walk->db,auxi->db))
break;
}
if (!walk)
{
net_printf(thd,ER_NONUNIQ_TABLE,auxi->real_name);
goto error;
}
auxi->lock_type=walk->lock_type=TL_WRITE;
auxi->table_list= walk; // Remember corresponding table
}
if (add_item_to_list(new Item_null()))
{
res= -1;
break;
}
thd->proc_info="init";
if ((res=open_and_lock_tables(thd,tables)))
break;
/* Fix tables-to-be-deleted-from list to point at opened tables */
for (auxi=(TABLE_LIST*) aux_tables ; auxi ; auxi=auxi->next)
auxi->table= auxi->table_list->table;
if (!thd->fatal_error && (result= new multi_delete(thd,aux_tables,
lex->lock_option,
table_count)))
{
res= mysql_select(thd,tables,select_lex->item_list,
select_lex->where,
(ORDER *)NULL,(ORDER *)NULL,(Item *)NULL,
(ORDER *)NULL,
select_lex->options | thd->options |
SELECT_NO_JOIN_CACHE,
result, unit, select_lex, 0);
delete result;
}
else
res= -1; // Error is not sent
close_thread_tables(thd);
break;
}
case SQLCOM_DROP_TABLE:
{
if (check_table_access(thd,DROP_ACL,tables))
goto error; /* purecov: inspected */
if (end_active_trans(thd))
res= -1;
else
res = mysql_rm_table(thd,tables,lex->drop_if_exists);
}
break;
case SQLCOM_DROP_INDEX:
if (!tables->db)
tables->db=thd->db;
if (check_access(thd,INDEX_ACL,tables->db,&tables->grant.privilege))
goto error; /* purecov: inspected */
if (grant_option && check_grant(thd,INDEX_ACL,tables))
goto error;
if (end_active_trans(thd))
res= -1;
else
res = mysql_drop_index(thd, tables, lex->drop_list);
break;
case SQLCOM_SHOW_DATABASES:
#if defined(DONT_ALLOW_SHOW_COMMANDS)
send_error(thd,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
DBUG_VOID_RETURN;
#else
if ((specialflag & SPECIAL_SKIP_SHOW_DB) &&
check_global_access(thd, SHOW_DB_ACL))
goto error;
res= mysqld_show_dbs(thd, (lex->wild ? lex->wild->ptr() : NullS));
break;
#endif
case SQLCOM_SHOW_PROCESSLIST:
if (!thd->priv_user[0] && check_global_access(thd,PROCESS_ACL))
break;
mysqld_list_processes(thd,thd->master_access & PROCESS_ACL ? NullS :
thd->priv_user,lex->verbose);
break;
case SQLCOM_SHOW_TABLE_TYPES:
res= mysqld_show_table_types(thd);
break;
case SQLCOM_SHOW_PRIVILEGES:
res= mysqld_show_privileges(thd);
break;
case SQLCOM_SHOW_COLUMN_TYPES:
res= mysqld_show_column_types(thd);
break;
case SQLCOM_SHOW_STATUS:
res= mysqld_show(thd,(lex->wild ? lex->wild->ptr() : NullS),status_vars,
OPT_GLOBAL);
break;
case SQLCOM_SHOW_VARIABLES:
res= mysqld_show(thd, (lex->wild ? lex->wild->ptr() : NullS),
init_vars, lex->option_type);
break;
case SQLCOM_SHOW_LOGS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
send_error(thd,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
DBUG_VOID_RETURN;
#else
{
if (grant_option && check_access(thd, FILE_ACL, any_db))
goto error;
res= mysqld_show_logs(thd);
break;
}
#endif
case SQLCOM_SHOW_TABLES:
/* FALL THROUGH */
#ifdef DONT_ALLOW_SHOW_COMMANDS
send_error(thd,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
DBUG_VOID_RETURN;
#else
{
char *db=select_lex->db ? select_lex->db : thd->db;
if (!db)
{
send_error(thd,ER_NO_DB_ERROR); /* purecov: inspected */
goto error; /* purecov: inspected */
}
remove_escape(db); // Fix escaped '_'
if (check_db_name(db))
{
net_printf(thd,ER_WRONG_DB_NAME, db);
goto error;
}
if (check_access(thd,SELECT_ACL,db,&thd->col_access))
goto error; /* purecov: inspected */
/* grant is checked in mysqld_show_tables */
if (select_lex->options & SELECT_DESCRIBE)
res= mysqld_extend_show_tables(thd,db,
(lex->wild ? lex->wild->ptr() : NullS));
else
res= mysqld_show_tables(thd,db,
(lex->wild ? lex->wild->ptr() : NullS));
break;
}
#endif
case SQLCOM_SHOW_OPEN_TABLES:
res= mysqld_show_open_tables(thd,(lex->wild ? lex->wild->ptr() : NullS));
break;
case SQLCOM_SHOW_CHARSETS:
res= mysqld_show_charsets(thd,(lex->wild ? lex->wild->ptr() : NullS));
break;
case SQLCOM_SHOW_FIELDS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
send_error(thd,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
DBUG_VOID_RETURN;
#else
{
char *db=tables->db;
if (!*db)
{
send_error(thd,ER_NO_DB_ERROR); /* purecov: inspected */
goto error; /* purecov: inspected */
}
remove_escape(db); // Fix escaped '_'
remove_escape(tables->real_name);
if (check_access(thd,SELECT_ACL | EXTRA_ACL,db,&thd->col_access))
goto error; /* purecov: inspected */
tables->grant.privilege=thd->col_access;
if (grant_option && check_grant(thd,SELECT_ACL,tables,2))
goto error;
res= mysqld_show_fields(thd,tables,
(lex->wild ? lex->wild->ptr() : NullS),
lex->verbose);
break;
}
#endif
case SQLCOM_SHOW_KEYS:
#ifdef DONT_ALLOW_SHOW_COMMANDS
send_error(thd,ER_NOT_ALLOWED_COMMAND); /* purecov: inspected */
DBUG_VOID_RETURN;
#else
{
char *db=tables->db;
if (!db)
{
send_error(thd,ER_NO_DB_ERROR); /* purecov: inspected */
goto error; /* purecov: inspected */
}
remove_escape(db); // Fix escaped '_'
remove_escape(tables->real_name);
if (!tables->db)
tables->db=thd->db;
if (check_access(thd,SELECT_ACL,db,&thd->col_access))
goto error; /* purecov: inspected */
tables->grant.privilege=thd->col_access;
if (grant_option && check_grant(thd,SELECT_ACL,tables,2))
goto error;
res= mysqld_show_keys(thd,tables);
break;
}
#endif
case SQLCOM_CHANGE_DB:
mysql_change_db(thd,select_lex->db);
break;
case SQLCOM_LOAD:
{
uint privilege= (lex->duplicates == DUP_REPLACE ?
INSERT_ACL | UPDATE_ACL | DELETE_ACL : INSERT_ACL);
if (!lex->local_file)
{
if (check_access(thd,privilege | FILE_ACL,tables->db))
goto error;
}
else
{
if (!(thd->client_capabilities & CLIENT_LOCAL_FILES) ||
! opt_local_infile)
{
send_error(thd,ER_NOT_ALLOWED_COMMAND);
goto error;
}
if (check_access(thd,privilege,tables->db,&tables->grant.privilege) ||
grant_option && check_grant(thd,privilege,tables))
goto error;
}
res=mysql_load(thd, lex->exchange, tables, lex->field_list,
lex->duplicates, (bool) lex->local_file, lex->lock_option);
break;
}
case SQLCOM_SET_OPTION:
if (!(res=sql_set_variables(thd, &lex->var_list)))
send_ok(thd);
break;
case SQLCOM_UNLOCK_TABLES:
if (thd->locked_tables)
{
thd->lock=thd->locked_tables;
thd->locked_tables=0; // Will be automaticly closed
}
if (thd->options & OPTION_TABLE_LOCK)
{
end_active_trans(thd);
thd->options&= ~(ulong) (OPTION_TABLE_LOCK);
}
if (thd->global_read_lock)
unlock_global_read_lock(thd);
send_ok(thd);
break;
case SQLCOM_LOCK_TABLES:
if (thd->locked_tables)
{
thd->lock=thd->locked_tables;
thd->locked_tables=0; // Will be automaticly closed
close_thread_tables(thd);
}
if (check_db_used(thd,tables) || end_active_trans(thd))
goto error;
if (check_table_access(thd, LOCK_TABLES_ACL | SELECT_ACL, tables))
goto error;
thd->in_lock_tables=1;
thd->options|= OPTION_TABLE_LOCK;
if (!(res=open_and_lock_tables(thd,tables)))
{
thd->locked_tables=thd->lock;
thd->lock=0;
send_ok(thd);
}
else
thd->options&= ~(ulong) (OPTION_TABLE_LOCK);
thd->in_lock_tables=0;
break;
case SQLCOM_CREATE_DB:
{
if (!strip_sp(lex->name) || check_db_name(lex->name))
{
net_printf(thd,ER_WRONG_DB_NAME, lex->name);
break;
}
if (lower_case_table_names)
my_casedn_str(system_charset_info, lex->name);
if (check_access(thd,CREATE_ACL,lex->name,0,1))
break;
res=mysql_create_db(thd,lex->name,&lex->create_info,0);
break;
}
case SQLCOM_DROP_DB:
{
if (!strip_sp(lex->name) || check_db_name(lex->name))
{
net_printf(thd,ER_WRONG_DB_NAME, lex->name);
break;
}
if (lower_case_table_names)
my_casedn_str(system_charset_info, lex->name);
if (check_access(thd,DROP_ACL,lex->name,0,1))
break;
if (thd->locked_tables || thd->active_transaction())
{
send_error(thd,ER_LOCK_OR_ACTIVE_TRANSACTION);
goto error;
}
res=mysql_rm_db(thd,lex->name,lex->drop_if_exists,0);
break;
}
case SQLCOM_ALTER_DB:
{
if (!strip_sp(lex->name) || check_db_name(lex->name))
{
net_printf(thd,ER_WRONG_DB_NAME, lex->name);
break;
}
if (check_access(thd,ALTER_ACL,lex->name,0,1))
break;
if (thd->locked_tables || thd->active_transaction())
{
send_error(thd,ER_LOCK_OR_ACTIVE_TRANSACTION);
goto error;
}
res=mysql_alter_db(thd,lex->name,&lex->create_info);
break;
}
case SQLCOM_SHOW_CREATE_DB:
{
if (!strip_sp(lex->name) || check_db_name(lex->name))
{
net_printf(thd,ER_WRONG_DB_NAME, lex->name);
break;
}
if (check_access(thd,DROP_ACL,lex->name,0,1))
break;
if (thd->locked_tables || thd->active_transaction())
{
send_error(thd,ER_LOCK_OR_ACTIVE_TRANSACTION);
goto error;
}
res=mysqld_show_create_db(thd,lex->name,&lex->create_info);
break;
}
case SQLCOM_CREATE_FUNCTION:
if (check_access(thd,INSERT_ACL,"mysql",0,1))
break;
#ifdef HAVE_DLOPEN
if (!(res = mysql_create_function(thd,&lex->udf)))
send_ok(thd);
#else
res= -1;
#endif
break;
case SQLCOM_DROP_FUNCTION:
if (check_access(thd,DELETE_ACL,"mysql",0,1))
break;
#ifdef HAVE_DLOPEN
if (!(res = mysql_drop_function(thd,lex->udf.name)))
send_ok(thd);
#else
res= -1;
#endif
break;
case SQLCOM_REVOKE:
case SQLCOM_GRANT:
{
if (check_access(thd, lex->grant | lex->grant_tot_col | GRANT_ACL,
tables && tables->db ? tables->db : select_lex->db,
tables ? &tables->grant.privilege : 0,
tables ? 0 : 1))
goto error;
/*
Check that the user isn't trying to change a password for another
user if he doesn't have UPDATE privilege to the MySQL database
*/
if (thd->user) // If not replication
{
LEX_USER *user;
List_iterator <LEX_USER> user_list(lex->users_list);
while ((user=user_list++))
{
if (user->password.str &&
(strcmp(thd->user,user->user.str) ||
user->host.str &&
my_strcasecmp(system_charset_info,
user->host.str, thd->host_or_ip)))
{
if (check_access(thd, UPDATE_ACL, "mysql",0,1))
goto error;
break; // We are allowed to do changes
}
}
}
if (tables)
{
if (grant_option && check_grant(thd,
(lex->grant | lex->grant_tot_col |
GRANT_ACL),
tables))
goto error;
if (!(res = mysql_table_grant(thd,tables,lex->users_list, lex->columns,
lex->grant,
lex->sql_command == SQLCOM_REVOKE)))
{
mysql_update_log.write(thd, thd->query, thd->query_length);
if (mysql_bin_log.is_open())
{
Query_log_event qinfo(thd, thd->query, thd->query_length);
mysql_bin_log.write(&qinfo);
}
}
}
else
{
if (lex->columns.elements)
{
send_error(thd,ER_ILLEGAL_GRANT_FOR_TABLE);
res=1;
}
else
res = mysql_grant(thd, select_lex->db, lex->users_list, lex->grant,
lex->sql_command == SQLCOM_REVOKE);
if (!res)
{
mysql_update_log.write(thd, thd->query, thd->query_length);
if (mysql_bin_log.is_open())
{
Query_log_event qinfo(thd, thd->query, thd->query_length);
mysql_bin_log.write(&qinfo);
}
if (mqh_used && lex->sql_command == SQLCOM_GRANT)
{
List_iterator <LEX_USER> str_list(lex->users_list);
LEX_USER *user;
while ((user=str_list++))
reset_mqh(thd,user);
}
}
}
break;
}
case SQLCOM_FLUSH:
case SQLCOM_RESET:
if (check_global_access(thd,RELOAD_ACL) || check_db_used(thd, tables))
goto error;
if (reload_acl_and_cache(thd, lex->type, tables))
send_error(thd,0);
else
send_ok(thd);
break;
case SQLCOM_KILL:
kill_one_thread(thd,lex->thread_id);
break;
case SQLCOM_SHOW_GRANTS:
res=0;
if ((thd->priv_user &&
!strcmp(thd->priv_user,lex->grant_user->user.str)) ||
!check_access(thd, SELECT_ACL, "mysql",0,1))
{
res = mysql_show_grants(thd,lex->grant_user);
}
break;
case SQLCOM_HA_OPEN:
if (check_db_used(thd,tables) ||
check_table_access(thd,SELECT_ACL, tables))
goto error;
res = mysql_ha_open(thd, tables);
break;
case SQLCOM_HA_CLOSE:
if (check_db_used(thd,tables))
goto error;
res = mysql_ha_close(thd, tables);
break;
case SQLCOM_HA_READ:
if (check_db_used(thd,tables) ||
check_table_access(thd,SELECT_ACL, tables))
goto error;
res = mysql_ha_read(thd, tables, lex->ha_read_mode, lex->backup_dir,
lex->insert_list, lex->ha_rkey_mode, select_lex->where,
select_lex->select_limit, select_lex->offset_limit);
break;
case SQLCOM_BEGIN:
if (thd->locked_tables)
{
thd->lock=thd->locked_tables;
thd->locked_tables=0; // Will be automaticly closed
close_thread_tables(thd); // Free tables
}
if (end_active_trans(thd))
{
res= -1;
}
else
{
thd->options= ((thd->options & (ulong) ~(OPTION_STATUS_NO_TRANS_UPDATE)) |
OPTION_BEGIN);
thd->server_status|= SERVER_STATUS_IN_TRANS;
send_ok(thd);
}
break;
case SQLCOM_COMMIT:
/*
We don't use end_active_trans() here to ensure that this works
even if there is a problem with the OPTION_AUTO_COMMIT flag
(Which of course should never happen...)
*/
{
thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
thd->server_status&= ~SERVER_STATUS_IN_TRANS;
if (!ha_commit(thd))
{
send_ok(thd);
}
else
res= -1;
break;
}
case SQLCOM_ROLLBACK:
thd->server_status&= ~SERVER_STATUS_IN_TRANS;
if (!ha_rollback(thd))
{
if (thd->options & OPTION_STATUS_NO_TRANS_UPDATE)
send_warning(thd,ER_WARNING_NOT_COMPLETE_ROLLBACK,0);
else
send_ok(thd);
}
else
res= -1;
thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
break;
default: /* Impossible */
send_ok(thd);
break;
}
thd->proc_info="query end"; // QQ
if (res < 0)
send_error(thd,thd->killed ? ER_SERVER_SHUTDOWN : 0);
error:
DBUG_VOID_RETURN;
}
/****************************************************************************
Get the user (global) and database privileges for all used tables
Returns true (error) if we can't get the privileges and we don't use
table/column grants.
The idea of EXTRA_ACL is that one will be granted access to the table if
one has the asked privilege on any column combination of the table; For
example to be able to check a table one needs to have SELECT privilege on
any column of the table.
****************************************************************************/
bool
check_access(THD *thd, ulong want_access, const char *db, ulong *save_priv,
bool dont_check_global_grants, bool no_errors)
{
DBUG_ENTER("check_access");
DBUG_PRINT("enter",("want_access: %lu master_access: %lu", want_access,
thd->master_access));
ulong db_access,dummy;
if (save_priv)
*save_priv=0;
else
save_priv= &dummy;
if ((!db || !db[0]) && !thd->db && !dont_check_global_grants)
{
if (!no_errors)
send_error(thd,ER_NO_DB_ERROR); /* purecov: tested */
DBUG_RETURN(TRUE); /* purecov: tested */
}
if ((thd->master_access & want_access) == want_access)
{
*save_priv=thd->master_access;
DBUG_RETURN(FALSE);
}
if (((want_access & ~thd->master_access) & ~(DB_ACLS | EXTRA_ACL)) ||
! db && dont_check_global_grants)
{ // We can never grant this
if (!no_errors)
net_printf(thd,ER_ACCESS_DENIED_ERROR,
thd->priv_user,
thd->host_or_ip,
thd->password ? ER(ER_YES) : ER(ER_NO));/* purecov: tested */
DBUG_RETURN(TRUE); /* purecov: tested */
}
if (db == any_db)
DBUG_RETURN(FALSE); // Allow select on anything
if (db && (!thd->db || strcmp(db,thd->db)))
db_access=acl_get(thd->host, thd->ip, (char*) &thd->remote.sin_addr,
thd->priv_user, db); /* purecov: inspected */
else
db_access=thd->db_access;
// Remove SHOW attribute and access rights we already have
want_access &= ~(thd->master_access | EXTRA_ACL);
db_access= ((*save_priv=(db_access | thd->master_access)) & want_access);
/* grant_option is set if there exists a single table or column grant */
if (db_access == want_access ||
((grant_option && !dont_check_global_grants) &&
!(want_access & ~TABLE_ACLS)))
DBUG_RETURN(FALSE); /* Ok */
if (!no_errors)
net_printf(thd,ER_DBACCESS_DENIED_ERROR,
thd->priv_user,
thd->host_or_ip,
db ? db : thd->db ? thd->db : "unknown"); /* purecov: tested */
DBUG_RETURN(TRUE); /* purecov: tested */
}
/* check for global access and give descriptive error message if it fails */
bool check_global_access(THD *thd, ulong want_access)
{
char command[128];
if ((thd->master_access & want_access) == want_access)
return 0;
get_privilege_desc(command, sizeof(command), want_access);
net_printf(thd,ER_SPECIFIC_ACCESS_DENIED_ERROR,
command);
return 1;
}
/*
Check the privilege for all used tables. Table privileges are cached
in the table list for GRANT checking
*/
bool
check_table_access(THD *thd, ulong want_access,TABLE_LIST *tables,
bool no_errors)
{
uint found=0;
ulong found_access=0;
TABLE_LIST *org_tables=tables;
for (; tables ; tables=tables->next)
{
if (tables->derived || (tables->table && (int)tables->table->tmp_table))
continue;
if ((thd->master_access & want_access) == (want_access & ~EXTRA_ACL) &&
thd->db)
tables->grant.privilege= want_access;
else if (tables->db && tables->db == thd->db)
{
if (found && !grant_option) // db already checked
tables->grant.privilege=found_access;
else
{
if (check_access(thd,want_access,tables->db,&tables->grant.privilege,
0, no_errors))
return TRUE; // Access denied
found_access=tables->grant.privilege;
found=1;
}
}
else if (check_access(thd,want_access,tables->db,&tables->grant.privilege,
0, no_errors))
return TRUE;
}
if (grant_option)
return check_grant(thd,want_access & ~EXTRA_ACL,org_tables,
test(want_access & EXTRA_ACL), no_errors);
return FALSE;
}
static bool check_db_used(THD *thd,TABLE_LIST *tables)
{
for (; tables ; tables=tables->next)
{
if (!tables->db)
{
if (!(tables->db=thd->db))
{
send_error(thd,ER_NO_DB_ERROR); /* purecov: tested */
return TRUE; /* purecov: tested */
}
}
}
return FALSE;
}
static bool check_merge_table_access(THD *thd, char *db,
TABLE_LIST *table_list)
{
int error=0;
if (table_list)
{
/* Check that all tables use the current database */
TABLE_LIST *tmp;
for (tmp=table_list; tmp ; tmp=tmp->next)
{
if (!tmp->db || !tmp->db[0])
tmp->db=db;
else if (strcmp(tmp->db,db))
{
send_error(thd,ER_UNION_TABLES_IN_DIFFERENT_DIR);
return 1;
}
}
error=check_table_access(thd, SELECT_ACL | UPDATE_ACL | DELETE_ACL,
table_list);
}
return error;
}
/****************************************************************************
Check stack size; Send error if there isn't enough stack to continue
****************************************************************************/
#if STACK_DIRECTION < 0
#define used_stack(A,B) (long) (A - B)
#else
#define used_stack(A,B) (long) (B - A)
#endif
bool check_stack_overrun(THD *thd,char *buf __attribute__((unused)))
{
long stack_used;
if ((stack_used=used_stack(thd->thread_stack,(char*) &stack_used)) >=
(long) thread_stack_min)
{
sprintf(errbuff[0],ER(ER_STACK_OVERRUN),stack_used,thread_stack);
my_message(ER_STACK_OVERRUN,errbuff[0],MYF(0));
thd->fatal_error=1;
return 1;
}
return 0;
}
#define MY_YACC_INIT 1000 // Start with big alloc
#define MY_YACC_MAX 32000 // Because of 'short'
bool my_yyoverflow(short **yyss, YYSTYPE **yyvs, int *yystacksize)
{
LEX *lex=current_lex;
int old_info=0;
if ((uint) *yystacksize >= MY_YACC_MAX)
return 1;
if (!lex->yacc_yyvs)
old_info= *yystacksize;
*yystacksize= set_zone((*yystacksize)*2,MY_YACC_INIT,MY_YACC_MAX);
if (!(lex->yacc_yyvs= (char*)
my_realloc((gptr) lex->yacc_yyvs,
*yystacksize*sizeof(**yyvs),
MYF(MY_ALLOW_ZERO_PTR | MY_FREE_ON_ERROR))) ||
!(lex->yacc_yyss= (char*)
my_realloc((gptr) lex->yacc_yyss,
*yystacksize*sizeof(**yyss),
MYF(MY_ALLOW_ZERO_PTR | MY_FREE_ON_ERROR))))
return 1;
if (old_info)
{ // Copy old info from stack
memcpy(lex->yacc_yyss, (gptr) *yyss, old_info*sizeof(**yyss));
memcpy(lex->yacc_yyvs, (gptr) *yyvs, old_info*sizeof(**yyvs));
}
*yyss=(short*) lex->yacc_yyss;
*yyvs=(YYSTYPE*) lex->yacc_yyvs;
return 0;
}
/****************************************************************************
Initialize global thd variables needed for query
****************************************************************************/
void
mysql_init_query(THD *thd)
{
DBUG_ENTER("mysql_init_query");
LEX *lex=&thd->lex;
lex->unit.init_query();
lex->unit.init_select();
lex->select_lex.init_query();
lex->value_list.empty();
lex->param_list.empty();
lex->unit.global_parameters= lex->unit.slave= lex->current_select= &lex->select_lex;
lex->select_lex.master= &lex->unit;
lex->select_lex.prev= &lex->unit.slave;
lex->olap=lex->describe=0;
lex->derived_tables= false;
thd->select_number= lex->select_lex.select_number= 1;
thd->free_list= 0;
thd->total_warn_count=0; // Warnings for this query
thd->last_insert_id_used= thd->query_start_used= thd->insert_id_used=0;
thd->sent_row_count= thd->examined_row_count= 0;
thd->fatal_error= thd->rand_used=0;
thd->safe_to_cache_query= 1;
DBUG_VOID_RETURN;
}
void
mysql_init_select(LEX *lex)
{
SELECT_LEX *select_lex= lex->current_select->select_lex();
DBUG_ASSERT(select_lex->linkage != GLOBAL_OPTIONS_TYPE);
select_lex->init_select();
select_lex->master_unit()->select_limit= select_lex->select_limit=
lex->thd->variables.select_limit;
lex->exchange= 0;
lex->result= 0;
lex->proc_list.first= 0;
}
bool
mysql_new_select(LEX *lex, bool move_down)
{
SELECT_LEX *select_lex = new SELECT_LEX();
select_lex->select_number= ++lex->thd->select_number;
if (!select_lex)
return 1;
select_lex->init_query();
select_lex->init_select();
if (move_down)
{
/* first select_lex of subselect or derived table */
SELECT_LEX_UNIT *unit= new SELECT_LEX_UNIT();
if (!unit)
return 1;
unit->init_query();
unit->init_select();
unit->include_down(lex->current_select);
select_lex->include_down(unit);
}
else
select_lex->include_neighbour(lex->current_select);
select_lex->master_unit()->global_parameters= select_lex;
DBUG_ASSERT(lex->current_select->linkage != GLOBAL_OPTIONS_TYPE);
select_lex->include_global(lex->current_select->select_lex()->
next_select_in_list_addr());
lex->current_select= select_lex;
return 0;
}
/*
Create a select to return the same output as 'SELECT @@var_name'.
SYNOPSIS
create_select_for_variable()
var_name Variable name
DESCRIPTION
Used for SHOW COUNT(*) [ WARNINGS | ERROR]
This will crash with a core dump if the variable doesn't exists
*/
void create_select_for_variable(const char *var_name)
{
LEX *lex;
LEX_STRING tmp;
DBUG_ENTER("create_select_for_variable");
lex= current_lex;
mysql_init_select(lex);
lex->sql_command= SQLCOM_SELECT;
tmp.str= (char*) var_name;
tmp.length=strlen(var_name);
add_item_to_list(get_system_var(OPT_SESSION, tmp));
DBUG_VOID_RETURN;
}
void mysql_init_multi_delete(LEX *lex)
{
lex->sql_command= SQLCOM_DELETE_MULTI;
mysql_init_select(lex);
lex->select_lex.select_limit= lex->unit.select_limit_cnt=
HA_POS_ERROR;
lex->auxilliary_table_list= lex->select_lex.table_list;
lex->select_lex.init_query();
}
void
mysql_parse(THD *thd, char *inBuf, uint length)
{
DBUG_ENTER("mysql_parse");
mysql_init_query(thd);
thd->query_length = length;
if (query_cache_send_result_to_client(thd, inBuf, length) <= 0)
{
LEX *lex=lex_start(thd, (uchar*) inBuf, length);
if (!yyparse() && ! thd->fatal_error)
{
if (mqh_used && thd->user_connect &&
check_mqh(thd, lex->sql_command))
{
thd->net.error = 0;
}
else
{
mysql_execute_command(thd);
query_cache_end_of_result(&thd->net);
}
}
else
{
DBUG_PRINT("info",("Command aborted. Fatal_error: %d",
thd->fatal_error));
query_cache_abort(&thd->net);
}
thd->proc_info="freeing items";
free_items(thd->free_list); /* Free strings used by items */
lex_end(lex);
}
DBUG_VOID_RETURN;
}
inline static void
link_in_list(SQL_LIST *list,byte *element,byte **next)
{
list->elements++;
(*list->next)=element;
list->next=next;
*next=0;
}
/*****************************************************************************
** Store field definition for create
** Return 0 if ok
******************************************************************************/
bool add_field_to_list(char *field_name, enum_field_types type,
char *length, char *decimals,
uint type_modifier,
Item *default_value, Item *comment,
char *change, TYPELIB *interval, CHARSET_INFO *cs)
{
register create_field *new_field;
THD *thd=current_thd;
LEX *lex= &thd->lex;
uint allowed_type_modifier=0;
DBUG_ENTER("add_field_to_list");
if (strlen(field_name) > NAME_LEN)
{
net_printf(thd, ER_TOO_LONG_IDENT, field_name); /* purecov: inspected */
DBUG_RETURN(1); /* purecov: inspected */
}
if (type_modifier & PRI_KEY_FLAG)
{
lex->col_list.push_back(new key_part_spec(field_name,0));
lex->key_list.push_back(new Key(Key::PRIMARY, NullS, HA_KEY_ALG_UNDEF,
lex->col_list));
lex->col_list.empty();
}
if (type_modifier & (UNIQUE_FLAG | UNIQUE_KEY_FLAG))
{
lex->col_list.push_back(new key_part_spec(field_name,0));
lex->key_list.push_back(new Key(Key::UNIQUE, NullS, HA_KEY_ALG_UNDEF,
lex->col_list));
lex->col_list.empty();
}
if (default_value && default_value->type() == Item::NULL_ITEM)
{
if ((type_modifier & (NOT_NULL_FLAG | AUTO_INCREMENT_FLAG)) ==
NOT_NULL_FLAG)
{
net_printf(thd,ER_INVALID_DEFAULT,field_name);
DBUG_RETURN(1);
}
default_value=0;
}
if (!(new_field=new create_field()))
DBUG_RETURN(1);
new_field->field=0;
new_field->field_name=field_name;
new_field->def= (type_modifier & AUTO_INCREMENT_FLAG ? 0 : default_value);
new_field->flags= type_modifier;
new_field->unireg_check= (type_modifier & AUTO_INCREMENT_FLAG ?
Field::NEXT_NUMBER : Field::NONE);
new_field->decimals= decimals ? (uint) set_zone(atoi(decimals),0,
NOT_FIXED_DEC-1) : 0;
new_field->sql_type=type;
new_field->length=0;
new_field->change=change;
new_field->interval=0;
new_field->pack_length=0;
new_field->charset=cs;
if (!comment)
{
new_field->comment.str=0;
new_field->comment.length=0;
}
else
{
/* In this case comment is always of type Item_string */
new_field->comment.str= (char*) comment->str_value.ptr();
new_field->comment.length=comment->str_value.length();
}
if (length)
if (!(new_field->length= (uint) atoi(length)))
length=0; /* purecov: inspected */
uint sign_len=type_modifier & UNSIGNED_FLAG ? 0 : 1;
if (new_field->length && new_field->decimals &&
new_field->length < new_field->decimals+1 &&
new_field->decimals != NOT_FIXED_DEC)
new_field->length=new_field->decimals+1; /* purecov: inspected */
switch (type) {
case FIELD_TYPE_TINY:
if (!length) new_field->length=3+sign_len;
allowed_type_modifier= AUTO_INCREMENT_FLAG;
break;
case FIELD_TYPE_SHORT:
if (!length) new_field->length=5+sign_len;
allowed_type_modifier= AUTO_INCREMENT_FLAG;
break;
case FIELD_TYPE_INT24:
if (!length) new_field->length=8+sign_len;
allowed_type_modifier= AUTO_INCREMENT_FLAG;
break;
case FIELD_TYPE_LONG:
if (!length) new_field->length=10+sign_len;
allowed_type_modifier= AUTO_INCREMENT_FLAG;
break;
case FIELD_TYPE_LONGLONG:
if (!length) new_field->length=20;
allowed_type_modifier= AUTO_INCREMENT_FLAG;
break;
case FIELD_TYPE_STRING:
case FIELD_TYPE_VAR_STRING:
case FIELD_TYPE_NULL:
case FIELD_TYPE_GEOMETRY:
break;
case FIELD_TYPE_DECIMAL:
if (!length)
new_field->length = 10; // Default length for DECIMAL
new_field->length+=sign_len;
if (new_field->decimals)
new_field->length++;
break;
case FIELD_TYPE_BLOB:
case FIELD_TYPE_TINY_BLOB:
case FIELD_TYPE_LONG_BLOB:
case FIELD_TYPE_MEDIUM_BLOB:
if (default_value) // Allow empty as default value
{
String str,*res;
res=default_value->val_str(&str);
if (res->length())
{
net_printf(thd,ER_BLOB_CANT_HAVE_DEFAULT,field_name); /* purecov: inspected */
DBUG_RETURN(1); /* purecov: inspected */
}
new_field->def=0;
}
new_field->flags|=BLOB_FLAG;
break;
case FIELD_TYPE_YEAR:
if (!length || new_field->length != 2)
new_field->length=4; // Default length
new_field->flags|= ZEROFILL_FLAG | UNSIGNED_FLAG;
break;
case FIELD_TYPE_FLOAT:
/* change FLOAT(precision) to FLOAT or DOUBLE */
allowed_type_modifier= AUTO_INCREMENT_FLAG;
if (length && !decimals)
{
uint tmp_length=new_field->length;
if (tmp_length > PRECISION_FOR_DOUBLE)
{
net_printf(thd,ER_WRONG_FIELD_SPEC,field_name);
DBUG_RETURN(1);
}
else if (tmp_length > PRECISION_FOR_FLOAT)
{
new_field->sql_type=FIELD_TYPE_DOUBLE;
new_field->length=DBL_DIG+7; // -[digits].E+###
}
else
new_field->length=FLT_DIG+6; // -[digits].E+##
new_field->decimals= NOT_FIXED_DEC;
break;
}
if (!length)
{
new_field->length = FLT_DIG+6;
new_field->decimals= NOT_FIXED_DEC;
}
break;
case FIELD_TYPE_DOUBLE:
allowed_type_modifier= AUTO_INCREMENT_FLAG;
if (!length)
{
new_field->length = DBL_DIG+7;
new_field->decimals=NOT_FIXED_DEC;
}
break;
case FIELD_TYPE_TIMESTAMP:
if (!length)
new_field->length= 14; // Full date YYYYMMDDHHMMSS
else
{
new_field->length=((new_field->length+1)/2)*2; /* purecov: inspected */
new_field->length= min(new_field->length,14); /* purecov: inspected */
}
new_field->flags|= ZEROFILL_FLAG | UNSIGNED_FLAG | NOT_NULL_FLAG;
break;
case FIELD_TYPE_DATE: // Old date type
if (protocol_version != PROTOCOL_VERSION-1)
new_field->sql_type=FIELD_TYPE_NEWDATE;
/* fall trough */
case FIELD_TYPE_NEWDATE:
new_field->length=10;
break;
case FIELD_TYPE_TIME:
new_field->length=10;
break;
case FIELD_TYPE_DATETIME:
new_field->length=19;
break;
case FIELD_TYPE_SET:
{
if (interval->count > sizeof(longlong)*8)
{
net_printf(thd,ER_TOO_BIG_SET,field_name); /* purecov: inspected */
DBUG_RETURN(1); /* purecov: inspected */
}
new_field->pack_length=(interval->count+7)/8;
if (new_field->pack_length > 4)
new_field->pack_length=8;
new_field->interval=interval;
new_field->length=0;
for (const char **pos=interval->type_names; *pos ; pos++)
{
new_field->length+=(uint) strip_sp((char*) *pos)+1;
}
new_field->length--;
set_if_smaller(new_field->length,MAX_FIELD_WIDTH-1);
if (default_value)
{
thd->cuted_fields=0;
String str,*res;
res=default_value->val_str(&str);
(void) find_set(interval,res->ptr(),res->length());
if (thd->cuted_fields)
{
net_printf(thd,ER_INVALID_DEFAULT,field_name);
DBUG_RETURN(1);
}
}
}
break;
case FIELD_TYPE_ENUM:
{
new_field->interval=interval;
new_field->pack_length=interval->count < 256 ? 1 : 2; // Should be safe
new_field->length=(uint) strip_sp((char*) interval->type_names[0]);
for (const char **pos=interval->type_names+1; *pos ; pos++)
{
uint length=(uint) strip_sp((char*) *pos);
set_if_bigger(new_field->length,length);
}
set_if_smaller(new_field->length,MAX_FIELD_WIDTH-1);
if (default_value)
{
String str,*res;
res=default_value->val_str(&str);
if (!find_enum(interval,res->ptr(),res->length()))
{
net_printf(thd,ER_INVALID_DEFAULT,field_name);
DBUG_RETURN(1);
}
}
break;
}
}
if (new_field->length >= MAX_FIELD_WIDTH ||
(!new_field->length && !(new_field->flags & BLOB_FLAG) &&
type != FIELD_TYPE_STRING && type != FIELD_TYPE_VAR_STRING))
{
net_printf(thd,ER_TOO_BIG_FIELDLENGTH,field_name,
MAX_FIELD_WIDTH-1); /* purecov: inspected */
DBUG_RETURN(1); /* purecov: inspected */
}
type_modifier&= AUTO_INCREMENT_FLAG;
if ((~allowed_type_modifier) & type_modifier)
{
net_printf(thd,ER_WRONG_FIELD_SPEC,field_name);
DBUG_RETURN(1);
}
if (!new_field->pack_length)
new_field->pack_length=calc_pack_length(new_field->sql_type ==
FIELD_TYPE_VAR_STRING ?
FIELD_TYPE_STRING :
new_field->sql_type,
new_field->length);
lex->create_list.push_back(new_field);
lex->last_field=new_field;
DBUG_RETURN(0);
}
/* Store position for column in ALTER TABLE .. ADD column */
void store_position_for_column(const char *name)
{
current_lex->last_field->after=my_const_cast(char*) (name);
}
bool
add_proc_to_list(Item *item)
{
ORDER *order;
Item **item_ptr;
if (!(order = (ORDER *) sql_alloc(sizeof(ORDER)+sizeof(Item*))))
return 1;
item_ptr = (Item**) (order+1);
*item_ptr= item;
order->item=item_ptr;
order->free_me=0;
link_in_list(&current_lex->proc_list,(byte*) order,(byte**) &order->next);
return 0;
}
/* Fix escaping of _, % and \ in database and table names (for ODBC) */
static void remove_escape(char *name)
{
if (!*name) // For empty DB names
return;
char *to;
#ifdef USE_MB
char *strend=name+(uint) strlen(name);
#endif
for (to=name; *name ; name++)
{
#ifdef USE_MB
int l;
/* if ((l = ismbchar(name, name+MBMAXLEN))) { Wei He: I think it's wrong */
if (use_mb(system_charset_info) &&
(l = my_ismbchar(system_charset_info, name, strend)))
{
while (l--)
*to++ = *name++;
name--;
continue;
}
#endif
if (*name == '\\' && name[1])
name++; // Skip '\\'
*to++= *name;
}
*to=0;
}
/****************************************************************************
** save order by and tables in own lists
****************************************************************************/
bool add_to_list(SQL_LIST &list,Item *item,bool asc)
{
ORDER *order;
Item **item_ptr;
DBUG_ENTER("add_to_list");
if (!(order = (ORDER *) sql_alloc(sizeof(ORDER)+sizeof(Item*))))
DBUG_RETURN(1);
item_ptr = (Item**) (order+1);
*item_ptr=item;
order->item= item_ptr;
order->asc = asc;
order->free_me=0;
order->used=0;
link_in_list(&list,(byte*) order,(byte**) &order->next);
DBUG_RETURN(0);
}
TABLE_LIST *st_select_lex::add_table_to_list(Table_ident *table,
LEX_STRING *alias,
bool updating,
thr_lock_type flags,
List<String> *use_index,
List<String> *ignore_index)
{
register TABLE_LIST *ptr;
THD *thd=current_thd;
char *alias_str;
DBUG_ENTER("add_table_to_list");
if (!table)
DBUG_RETURN(0); // End of memory
alias_str= alias ? alias->str : table->table.str;
if (table->table.length > NAME_LEN ||
(table->table.length && check_table_name(table->table.str,table->table.length)) ||
table->db.str && check_db_name(table->db.str))
{
net_printf(thd,ER_WRONG_TABLE_NAME,table->table.str);
DBUG_RETURN(0);
}
if (!alias) /* Alias is case sensitive */
if (!(alias_str=thd->memdup(alias_str,table->table.length+1)))
DBUG_RETURN(0);
if (!(ptr = (TABLE_LIST *) thd->calloc(sizeof(TABLE_LIST))))
DBUG_RETURN(0); /* purecov: inspected */
if (table->db.str)
{
ptr->db= table->db.str;
ptr->db_length= table->db.length;
}
else if (thd->db)
{
ptr->db= thd->db;
ptr->db_length= thd->db_length;
}
else
{
/* The following can't be "" as we may do 'casedn_str()' on it */
ptr->db= empty_c_string;
ptr->db_length= 0;
}
ptr->alias= alias_str;
if (lower_case_table_names)
{
my_casedn_str(system_charset_info,ptr->db);
my_casedn_str(system_charset_info,table->table.str);
}
ptr->real_name=table->table.str;
ptr->real_name_length=table->table.length;
ptr->lock_type=flags;
ptr->updating=updating;
ptr->derived= (SELECT_LEX_UNIT *) table->sel;
if (use_index)
ptr->use_index=(List<String> *) thd->memdup((gptr) use_index,
sizeof(*use_index));
if (ignore_index)
ptr->ignore_index=(List<String> *) thd->memdup((gptr) ignore_index,
sizeof(*ignore_index));
/* check that used name is unique */
if (flags != TL_IGNORE)
{
for (TABLE_LIST *tables=(TABLE_LIST*) table_list.first ;
tables ;
tables=tables->next)
{
if (!strcmp(alias_str,tables->alias) && !strcmp(ptr->db, tables->db))
{
net_printf(thd,ER_NONUNIQ_TABLE,alias_str); /* purecov: tested */
DBUG_RETURN(0); /* purecov: tested */
}
}
}
link_in_list(&table_list, (byte*) ptr, (byte**) &ptr->next);
DBUG_RETURN(ptr);
}
void add_join_on(TABLE_LIST *b,Item *expr)
{
if (!b->on_expr)
b->on_expr=expr;
else
{
// This only happens if you have both a right and left join
b->on_expr=new Item_cond_and(b->on_expr,expr);
}
}
void add_join_natural(TABLE_LIST *a,TABLE_LIST *b)
{
b->natural_join=a;
}
/* Check if name is used in table list */
static bool check_dup(const char *db, const char *name, TABLE_LIST *tables)
{
for (; tables ; tables=tables->next)
if (!strcmp(name,tables->real_name) && !strcmp(db,tables->db))
return 1;
return 0;
}
bool reload_acl_and_cache(THD *thd, ulong options, TABLE_LIST *tables)
{
bool result=0;
select_errors=0; /* Write if more errors */
if (options & REFRESH_GRANT)
{
acl_reload(thd);
grant_reload();
if (mqh_used)
reset_mqh(thd,(LEX_USER *) NULL,true);
}
if (options & REFRESH_LOG)
{
mysql_log.new_file(1);
mysql_update_log.new_file(1);
mysql_bin_log.new_file(1);
mysql_slow_log.new_file(1);
if (ha_flush_logs())
result=1;
}
#ifdef HAVE_QUERY_CACHE
if (options & REFRESH_QUERY_CACHE_FREE)
{
query_cache.pack(); // FLUSH QUERY CACHE
options &= ~REFRESH_QUERY_CACHE; //don't flush all cache, just free memory
}
if (options & (REFRESH_TABLES | REFRESH_QUERY_CACHE))
{
query_cache.flush(); // RESET QUERY CACHE
}
#endif /*HAVE_QUERY_CACHE*/
if (options & (REFRESH_TABLES | REFRESH_READ_LOCK))
{
if ((options & REFRESH_READ_LOCK) && thd)
{
if (lock_global_read_lock(thd))
return 1;
}
result=close_cached_tables(thd,(options & REFRESH_FAST) ? 0 : 1, tables);
}
if (options & REFRESH_HOSTS)
hostname_cache_refresh();
if (options & REFRESH_STATUS)
refresh_status();
if (options & REFRESH_THREADS)
flush_thread_cache();
if (options & REFRESH_MASTER)
if (reset_master(thd))
result=1;
#ifdef OPENSSL
if (options & REFRESH_DES_KEY_FILE)
{
if (des_key_file)
result=load_des_key_file(des_key_file);
}
#endif
if (options & REFRESH_SLAVE)
{
LOCK_ACTIVE_MI;
if (reset_slave(thd, active_mi))
result=1;
UNLOCK_ACTIVE_MI;
}
if (options & REFRESH_USER_RESOURCES)
reset_mqh(thd,(LEX_USER *) NULL);
return result;
}
/*
kill on thread
SYNOPSIS
kill_one_thread()
thd Thread class
id Thread id
NOTES
This is written such that we have a short lock on LOCK_thread_count
*/
void kill_one_thread(THD *thd, ulong id)
{
THD *tmp;
uint error=ER_NO_SUCH_THREAD;
VOID(pthread_mutex_lock(&LOCK_thread_count)); // For unlink from list
I_List_iterator<THD> it(threads);
while ((tmp=it++))
{
if (tmp->thread_id == id)
{
pthread_mutex_lock(&tmp->LOCK_delete); // Lock from delete
break;
}
}
VOID(pthread_mutex_unlock(&LOCK_thread_count));
if (tmp)
{
if ((thd->master_access & SUPER_ACL) ||
!strcmp(thd->user,tmp->user))
{
tmp->awake(1 /*prepare to die*/);
error=0;
}
else
error=ER_KILL_DENIED_ERROR;
pthread_mutex_unlock(&tmp->LOCK_delete);
}
if (!error)
send_ok(thd);
else
net_printf(thd,error,id);
}
/* Clear most status variables */
static void refresh_status(void)
{
pthread_mutex_lock(&THR_LOCK_keycache);
pthread_mutex_lock(&LOCK_status);
for (struct show_var_st *ptr=status_vars; ptr->name; ptr++)
{
if (ptr->type == SHOW_LONG)
*(ulong*) ptr->value=0;
}
pthread_mutex_unlock(&LOCK_status);
pthread_mutex_unlock(&THR_LOCK_keycache);
}
/* If pointer is not a null pointer, append filename to it */
static bool append_file_to_dir(THD *thd, char **filename_ptr, char *table_name)
{
char buff[FN_REFLEN],*ptr, *end;
if (!*filename_ptr)
return 0; // nothing to do
/* Check that the filename is not too long and it's a hard path */
if (strlen(*filename_ptr)+strlen(table_name) >= FN_REFLEN-1 ||
!test_if_hard_path(*filename_ptr))
{
my_error(ER_WRONG_TABLE_NAME, MYF(0), *filename_ptr);
return 1;
}
/* Fix is using unix filename format on dos */
strmov(buff,*filename_ptr);
end=convert_dirname(buff, *filename_ptr, NullS);
if (!(ptr=thd->alloc((uint) (end-buff)+(uint) strlen(table_name)+1)))
return 1; // End of memory
*filename_ptr=ptr;
strxmov(ptr,buff,table_name,NullS);
return 0;
}
/*
Check if the select is a simple select (not an union)
SYNOPSIS
check_simple_select()
RETURN VALUES
0 ok
1 error ; In this case the error messege is sent to the client
*/
bool check_simple_select()
{
THD *thd= current_thd;
if (thd->lex.current_select != &thd->lex.select_lex)
{
char command[80];
strmake(command, thd->lex.yylval->symbol.str,
min(thd->lex.yylval->symbol.length, sizeof(command)-1));
net_printf(thd, ER_CANT_USE_OPTION_HERE, command);
return 1;
}
return 0;
}
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