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mariadb/libmysql/libmysql.c
unknown 774c65c7a3 Merge abotchkov@bk-internal.mysql.com:/home/bk/mysql-4.1 
into deer.(none):/home/hf/work/mysql-4.1.stmt


include/mysql.h:
  Auto merged
libmysql/libmysql.c:
  Auto merged
libmysqld/libmysqld.c:
  Auto merged
2003-09-12 19:36:42 +05:00

3467 lines
84 KiB
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/* Copyright (C) 2000-2003 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 <my_global.h>
#if defined(__WIN__) || defined(_WIN32) || defined(_WIN64)
#include <winsock.h>
#include <odbcinst.h>
#endif
#include <my_sys.h>
#include <mysys_err.h>
#include <m_string.h>
#include <m_ctype.h>
#include "mysql.h"
#include "mysql_version.h"
#include "mysqld_error.h"
#include "errmsg.h"
#include <violite.h>
#include <sys/stat.h>
#include <signal.h>
#include <time.h>
#include <assert.h> /* for DBUG_ASSERT() */
#ifdef HAVE_PWD_H
#include <pwd.h>
#endif
#if !defined(MSDOS) && !defined(__WIN__)
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
#ifdef HAVE_SELECT_H
#include <select.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#endif /* !defined(MSDOS) && !defined(__WIN__) */
#ifdef HAVE_POLL
#include <sys/poll.h>
#endif
#ifdef HAVE_SYS_UN_H
#include <sys/un.h>
#endif
#if defined(THREAD) && !defined(__WIN__)
#include <my_pthread.h> /* because of signal() */
#endif
#ifndef INADDR_NONE
#define INADDR_NONE -1
#endif
#include <sql_common.h>
#include "client_settings.h"
ulong net_buffer_length=8192;
ulong max_allowed_packet= 1024L*1024L*1024L;
ulong net_read_timeout= NET_READ_TIMEOUT;
ulong net_write_timeout= NET_WRITE_TIMEOUT;
#ifdef EMBEDDED_LIBRARY
#undef net_flush
my_bool net_flush(NET *net);
#endif
#if defined(MSDOS) || defined(__WIN__)
/* socket_errno is defined in my_global.h for all platforms */
#define perror(A)
#else
#include <errno.h>
#define SOCKET_ERROR -1
#endif /* __WIN__ */
/*
If allowed through some configuration, then this needs to
be changed
*/
#define MAX_LONG_DATA_LENGTH 8192
#define unsigned_field(A) ((A)->flags & UNSIGNED_FLAG)
static void append_wild(char *to,char *end,const char *wild);
sig_handler pipe_sig_handler(int sig);
static ulong mysql_sub_escape_string(CHARSET_INFO *charset_info, char *to,
const char *from, ulong length);
my_bool stmt_close(MYSQL_STMT *stmt, my_bool skip_list);
static my_bool mysql_client_init= 0;
static my_bool org_my_init_done= 0;
void mysql_once_init(void)
{
if (!mysql_client_init)
{
mysql_client_init=1;
org_my_init_done=my_init_done;
my_init(); /* Will init threads */
init_client_errs();
if (!mysql_port)
{
mysql_port = MYSQL_PORT;
#ifndef MSDOS
{
struct servent *serv_ptr;
char *env;
if ((serv_ptr = getservbyname("mysql", "tcp")))
mysql_port = (uint) ntohs((ushort) serv_ptr->s_port);
if ((env = getenv("MYSQL_TCP_PORT")))
mysql_port =(uint) atoi(env);
}
#endif
}
if (!mysql_unix_port)
{
char *env;
#ifdef __WIN__
mysql_unix_port = (char*) MYSQL_NAMEDPIPE;
#else
mysql_unix_port = (char*) MYSQL_UNIX_ADDR;
#endif
if ((env = getenv("MYSQL_UNIX_PORT")))
mysql_unix_port = env;
}
mysql_debug(NullS);
#if defined(SIGPIPE) && !defined(THREAD) && !defined(__WIN__)
(void) signal(SIGPIPE,SIG_IGN);
#endif
}
#ifdef THREAD
else
my_thread_init(); /* Init if new thread */
#endif
}
#ifndef EMBEDDED_LIBRARY
int STDCALL mysql_server_init(int argc __attribute__((unused)),
char **argv __attribute__((unused)),
char **groups __attribute__((unused)))
{
mysql_once_init();
return 0;
}
void STDCALL mysql_server_end()
{
/* If library called my_init(), free memory allocated by it */
if (!org_my_init_done)
{
my_end(0);
#ifndef THREAD
/* Remove TRACING, if enabled by mysql_debug() */
DBUG_POP();
#endif
}
else
mysql_thread_end();
mysql_client_init= org_my_init_done= 0;
}
#endif /*EMBEDDED_LIBRARY*/
my_bool STDCALL mysql_thread_init()
{
#ifdef THREAD
return my_thread_init();
#else
return 0;
#endif
}
void STDCALL mysql_thread_end()
{
#ifdef THREAD
my_thread_end();
#endif
}
/*
Let the user specify that we don't want SIGPIPE; This doesn't however work
with threaded applications as we can have multiple read in progress.
*/
static MYSQL* spawn_init(MYSQL* parent, const char* host,
unsigned int port,
const char* user,
const char* passwd);
/*
Expand wildcard to a sql string
*/
static void
append_wild(char *to, char *end, const char *wild)
{
end-=5; /* Some extra */
if (wild && wild[0])
{
to=strmov(to," like '");
while (*wild && to < end)
{
if (*wild == '\\' || *wild == '\'')
*to++='\\';
*to++= *wild++;
}
if (*wild) /* Too small buffer */
*to++='%'; /* Nicer this way */
to[0]='\'';
to[1]=0;
}
}
/**************************************************************************
Init debugging if MYSQL_DEBUG environment variable is found
**************************************************************************/
void STDCALL
mysql_debug(const char *debug __attribute__((unused)))
{
#ifndef DBUG_OFF
char *env;
if (_db_on_)
return; /* Already using debugging */
if (debug)
{
DEBUGGER_ON;
DBUG_PUSH(debug);
}
else if ((env = getenv("MYSQL_DEBUG")))
{
DEBUGGER_ON;
DBUG_PUSH(env);
#if !defined(_WINVER) && !defined(WINVER)
puts("\n-------------------------------------------------------");
puts("MYSQL_DEBUG found. libmysql started with the following:");
puts(env);
puts("-------------------------------------------------------\n");
#else
{
char buff[80];
strmov(strmov(buff,"libmysql: "),env);
MessageBox((HWND) 0,"Debugging variable MYSQL_DEBUG used",buff,MB_OK);
}
#endif
}
#endif
}
/**************************************************************************
Close the server connection if we get a SIGPIPE
ARGSUSED
**************************************************************************/
sig_handler
pipe_sig_handler(int sig __attribute__((unused)))
{
DBUG_PRINT("info",("Hit by signal %d",sig));
#ifdef DONT_REMEMBER_SIGNAL
(void) signal(SIGPIPE,pipe_sig_handler);
#endif
}
/* perform query on master */
my_bool STDCALL mysql_master_query(MYSQL *mysql, const char *q,
unsigned long length)
{
DBUG_ENTER("mysql_master_query");
if (mysql_master_send_query(mysql, q, length))
DBUG_RETURN(1);
DBUG_RETURN(mysql_read_query_result(mysql));
}
my_bool STDCALL mysql_master_send_query(MYSQL *mysql, const char *q,
unsigned long length)
{
MYSQL *master = mysql->master;
DBUG_ENTER("mysql_master_send_query");
if (!master->net.vio && !mysql_real_connect(master,0,0,0,0,0,0,0))
DBUG_RETURN(1);
mysql->last_used_con = master;
DBUG_RETURN(simple_command(master, COM_QUERY, q, length, 1));
}
/* perform query on slave */
my_bool STDCALL mysql_slave_query(MYSQL *mysql, const char *q,
unsigned long length)
{
DBUG_ENTER("mysql_slave_query");
if (mysql_slave_send_query(mysql, q, length))
DBUG_RETURN(1);
DBUG_RETURN(mysql_read_query_result(mysql));
}
my_bool STDCALL mysql_slave_send_query(MYSQL *mysql, const char *q,
unsigned long length)
{
MYSQL* last_used_slave, *slave_to_use = 0;
DBUG_ENTER("mysql_slave_send_query");
if ((last_used_slave = mysql->last_used_slave))
slave_to_use = last_used_slave->next_slave;
else
slave_to_use = mysql->next_slave;
/*
Next_slave is always safe to use - we have a circular list of slaves
if there are no slaves, mysql->next_slave == mysql
*/
mysql->last_used_con = mysql->last_used_slave = slave_to_use;
if (!slave_to_use->net.vio && !mysql_real_connect(slave_to_use, 0,0,0,
0,0,0,0))
DBUG_RETURN(1);
DBUG_RETURN(simple_command(slave_to_use, COM_QUERY, q, length, 1));
}
/* enable/disable parsing of all queries to decide
if they go on master or slave */
void STDCALL mysql_enable_rpl_parse(MYSQL* mysql)
{
mysql->options.rpl_parse = 1;
}
void STDCALL mysql_disable_rpl_parse(MYSQL* mysql)
{
mysql->options.rpl_parse = 0;
}
/* get the value of the parse flag */
int STDCALL mysql_rpl_parse_enabled(MYSQL* mysql)
{
return mysql->options.rpl_parse;
}
/* enable/disable reads from master */
void STDCALL mysql_enable_reads_from_master(MYSQL* mysql)
{
mysql->options.no_master_reads = 0;
}
void STDCALL mysql_disable_reads_from_master(MYSQL* mysql)
{
mysql->options.no_master_reads = 1;
}
/* get the value of the master read flag */
my_bool STDCALL mysql_reads_from_master_enabled(MYSQL* mysql)
{
return !(mysql->options.no_master_reads);
}
/*
We may get an error while doing replication internals.
In this case, we add a special explanation to the original
error
*/
static void expand_error(MYSQL* mysql, int error)
{
char tmp[MYSQL_ERRMSG_SIZE];
char *p;
uint err_length;
strmake(tmp, mysql->net.last_error, MYSQL_ERRMSG_SIZE-1);
p = strmake(mysql->net.last_error, ER(error), MYSQL_ERRMSG_SIZE-1);
err_length= (uint) (p - mysql->net.last_error);
strmake(p, tmp, MYSQL_ERRMSG_SIZE-1 - err_length);
mysql->net.last_errno = error;
}
/*
This function assumes we have just called SHOW SLAVE STATUS and have
read the given result and row
*/
static my_bool get_master(MYSQL* mysql, MYSQL_RES* res, MYSQL_ROW row)
{
MYSQL* master;
DBUG_ENTER("get_master");
if (mysql_num_fields(res) < 3)
DBUG_RETURN(1); /* safety */
/* use the same username and password as the original connection */
if (!(master = spawn_init(mysql, row[0], atoi(row[2]), 0, 0)))
DBUG_RETURN(1);
mysql->master = master;
DBUG_RETURN(0);
}
/*
Assuming we already know that mysql points to a master connection,
retrieve all the slaves
*/
static my_bool get_slaves_from_master(MYSQL* mysql)
{
MYSQL_RES* res = 0;
MYSQL_ROW row;
my_bool error = 1;
int has_auth_info;
int port_ind;
DBUG_ENTER("get_slaves_from_master");
if (!mysql->net.vio && !mysql_real_connect(mysql,0,0,0,0,0,0,0))
{
expand_error(mysql, CR_PROBE_MASTER_CONNECT);
DBUG_RETURN(1);
}
if (mysql_query(mysql, "SHOW SLAVE HOSTS") ||
!(res = mysql_store_result(mysql)))
{
expand_error(mysql, CR_PROBE_SLAVE_HOSTS);
DBUG_RETURN(1);
}
switch (mysql_num_fields(res)) {
case 5:
has_auth_info = 0;
port_ind=2;
break;
case 7:
has_auth_info = 1;
port_ind=4;
break;
default:
goto err;
}
while ((row = mysql_fetch_row(res)))
{
MYSQL* slave;
const char* tmp_user, *tmp_pass;
if (has_auth_info)
{
tmp_user = row[2];
tmp_pass = row[3];
}
else
{
tmp_user = mysql->user;
tmp_pass = mysql->passwd;
}
if (!(slave = spawn_init(mysql, row[1], atoi(row[port_ind]),
tmp_user, tmp_pass)))
goto err;
/* Now add slave into the circular linked list */
slave->next_slave = mysql->next_slave;
mysql->next_slave = slave;
}
error = 0;
err:
if (res)
mysql_free_result(res);
DBUG_RETURN(error);
}
my_bool STDCALL mysql_rpl_probe(MYSQL* mysql)
{
MYSQL_RES *res= 0;
MYSQL_ROW row;
my_bool error= 1;
DBUG_ENTER("mysql_rpl_probe");
/*
First determine the replication role of the server we connected to
the most reliable way to do this is to run SHOW SLAVE STATUS and see
if we have a non-empty master host. This is still not fool-proof -
it is not a sin to have a master that has a dormant slave thread with
a non-empty master host. However, it is more reliable to check
for empty master than whether the slave thread is actually running
*/
if (mysql_query(mysql, "SHOW SLAVE STATUS") ||
!(res = mysql_store_result(mysql)))
{
expand_error(mysql, CR_PROBE_SLAVE_STATUS);
DBUG_RETURN(1);
}
row= mysql_fetch_row(res);
/*
Check master host for emptiness/NULL
For MySQL 4.0 it's enough to check for row[0]
*/
if (row && row[0] && *(row[0]))
{
/* this is a slave, ask it for the master */
if (get_master(mysql, res, row) || get_slaves_from_master(mysql))
goto err;
}
else
{
mysql->master = mysql;
if (get_slaves_from_master(mysql))
goto err;
}
error = 0;
err:
if (res)
mysql_free_result(res);
DBUG_RETURN(error);
}
/*
Make a not so fool-proof decision on where the query should go, to
the master or the slave. Ideally the user should always make this
decision himself with mysql_master_query() or mysql_slave_query().
However, to be able to more easily port the old code, we support the
option of an educated guess - this should work for most applications,
however, it may make the wrong decision in some particular cases. If
that happens, the user would have to change the code to call
mysql_master_query() or mysql_slave_query() explicitly in the place
where we have made the wrong decision
*/
enum mysql_rpl_type
STDCALL mysql_rpl_query_type(const char* q, int len)
{
const char *q_end= q + len;
for (; q < q_end; ++q)
{
char c;
if (my_isalpha(&my_charset_latin1, (c= *q)))
{
switch (my_tolower(&my_charset_latin1,c)) {
case 'i': /* insert */
case 'u': /* update or unlock tables */
case 'l': /* lock tables or load data infile */
case 'd': /* drop or delete */
case 'a': /* alter */
return MYSQL_RPL_MASTER;
case 'c': /* create or check */
return my_tolower(&my_charset_latin1,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
MYSQL_RPL_MASTER;
case 's': /* select or show */
return my_tolower(&my_charset_latin1,q[1]) == 'h' ? MYSQL_RPL_ADMIN :
MYSQL_RPL_SLAVE;
case 'f': /* flush */
case 'r': /* repair */
case 'g': /* grant */
return MYSQL_RPL_ADMIN;
default:
return MYSQL_RPL_SLAVE;
}
}
}
return MYSQL_RPL_MASTER; /* By default, send to master */
}
/**************************************************************************
Connect to sql server
If host == 0 then use localhost
**************************************************************************/
#ifdef USE_OLD_FUNCTIONS
MYSQL * STDCALL
mysql_connect(MYSQL *mysql,const char *host,
const char *user, const char *passwd)
{
MYSQL *res;
mysql=mysql_init(mysql); /* Make it thread safe */
{
DBUG_ENTER("mysql_connect");
if (!(res=mysql_real_connect(mysql,host,user,passwd,NullS,0,NullS,0)))
{
if (mysql->free_me)
my_free((gptr) mysql,MYF(0));
}
DBUG_RETURN(res);
}
}
#endif
/**************************************************************************
Change user and database
**************************************************************************/
my_bool STDCALL mysql_change_user(MYSQL *mysql, const char *user,
const char *passwd, const char *db)
{
char buff[512],*end=buff;
NET *net= &mysql->net;
ulong pkt_length;
DBUG_ENTER("mysql_change_user");
if (!user)
user="";
if (!passwd)
passwd="";
/* Store user into the buffer */
end=strmov(end,user)+1;
/* write scrambled password according to server capabilities */
if (passwd[0])
{
if (mysql->server_capabilities & CLIENT_SECURE_CONNECTION)
{
*end++= SCRAMBLE_LENGTH;
scramble(end, mysql->scramble, passwd);
end+= SCRAMBLE_LENGTH;
}
else
{
scramble_323(end, mysql->scramble, passwd);
end+= SCRAMBLE_LENGTH_323 + 1;
}
}
else
*end++= '\0'; // empty password
/* Add database if needed */
end= strmov(end, db ? db : "") + 1;
/* Write authentication package */
simple_command(mysql,COM_CHANGE_USER, buff,(ulong) (end-buff),1);
pkt_length= net_safe_read(mysql);
if (pkt_length == packet_error)
goto error;
if (pkt_length == 1 && net->read_pos[0] == 254 &&
mysql->server_capabilities & CLIENT_SECURE_CONNECTION)
{
/*
By sending this very specific reply server asks us to send scrambled
password in old format. The reply contains scramble_323.
*/
scramble_323(buff, mysql->scramble, passwd);
if (my_net_write(net, buff, SCRAMBLE_LENGTH_323 + 1) || net_flush(net))
{
net->last_errno= CR_SERVER_LOST;
strmov(net->sqlstate, unknown_sqlstate);
strmov(net->last_error,ER(net->last_errno));
goto error;
}
/* Read what server thinks about out new auth message report */
if (net_safe_read(mysql) == packet_error)
goto error;
}
/* Free old connect information */
my_free(mysql->user,MYF(MY_ALLOW_ZERO_PTR));
my_free(mysql->passwd,MYF(MY_ALLOW_ZERO_PTR));
my_free(mysql->db,MYF(MY_ALLOW_ZERO_PTR));
/* alloc new connect information */
mysql->user= my_strdup(user,MYF(MY_WME));
mysql->passwd=my_strdup(passwd,MYF(MY_WME));
mysql->db= db ? my_strdup(db,MYF(MY_WME)) : 0;
DBUG_RETURN(0);
error:
DBUG_RETURN(1);
}
#if defined(HAVE_GETPWUID) && defined(NO_GETPWUID_DECL)
struct passwd *getpwuid(uid_t);
char* getlogin(void);
#endif
#if defined(__NETWARE__)
/* default to "root" on NetWare */
void read_user_name(char *name)
{
char *str=getenv("USER");
strmake(name, str ? str : "UNKNOWN_USER", USERNAME_LENGTH);
}
#elif !defined(MSDOS) && ! defined(VMS) && !defined(__WIN__) && !defined(OS2)
void read_user_name(char *name)
{
DBUG_ENTER("read_user_name");
if (geteuid() == 0)
(void) strmov(name,"root"); /* allow use of surun */
else
{
#ifdef HAVE_GETPWUID
struct passwd *skr;
const char *str;
if ((str=getlogin()) == NULL)
{
if ((skr=getpwuid(geteuid())) != NULL)
str=skr->pw_name;
else if (!(str=getenv("USER")) && !(str=getenv("LOGNAME")) &&
!(str=getenv("LOGIN")))
str="UNKNOWN_USER";
}
(void) strmake(name,str,USERNAME_LENGTH);
#elif HAVE_CUSERID
(void) cuserid(name);
#else
strmov(name,"UNKNOWN_USER");
#endif
}
DBUG_VOID_RETURN;
}
#else /* If MSDOS || VMS */
void read_user_name(char *name)
{
char *str=getenv("USER"); /* ODBC will send user variable */
strmake(name,str ? str : "ODBC", USERNAME_LENGTH);
}
#endif
my_bool send_file_to_server(MYSQL *mysql, const char *filename)
{
int fd, readcount;
my_bool result= 1;
uint packet_length=MY_ALIGN(mysql->net.max_packet-16,IO_SIZE);
char *buf, tmp_name[FN_REFLEN];
NET *net= &mysql->net;
DBUG_ENTER("send_file_to_server");
if (!(buf=my_malloc(packet_length,MYF(0))))
{
strmov(net->sqlstate, unknown_sqlstate);
strmov(net->last_error, ER(net->last_errno=CR_OUT_OF_MEMORY));
DBUG_RETURN(1);
}
fn_format(tmp_name,filename,"","",4); /* Convert to client format */
if ((fd = my_open(tmp_name,O_RDONLY, MYF(0))) < 0)
{
my_net_write(net,"",0); /* Server needs one packet */
net_flush(net);
strmov(net->sqlstate, unknown_sqlstate);
net->last_errno=EE_FILENOTFOUND;
my_snprintf(net->last_error,sizeof(net->last_error)-1,
EE(net->last_errno),tmp_name, errno);
goto err;
}
while ((readcount = (int) my_read(fd,(byte*) buf,packet_length,MYF(0))) > 0)
{
if (my_net_write(net,buf,readcount))
{
DBUG_PRINT("error",("Lost connection to MySQL server during LOAD DATA of local file"));
strmov(net->sqlstate, unknown_sqlstate);
net->last_errno=CR_SERVER_LOST;
strmov(net->last_error,ER(net->last_errno));
goto err;
}
}
/* Send empty packet to mark end of file */
if (my_net_write(net,"",0) || net_flush(net))
{
strmov(net->sqlstate, unknown_sqlstate);
net->last_errno=CR_SERVER_LOST;
sprintf(net->last_error,ER(net->last_errno),errno);
goto err;
}
if (readcount < 0)
{
strmov(net->sqlstate, unknown_sqlstate);
net->last_errno=EE_READ; /* the errmsg for not entire file read */
my_snprintf(net->last_error,sizeof(net->last_error)-1,
tmp_name,errno);
goto err;
}
result=0; /* Ok */
err:
if (fd >= 0)
(void) my_close(fd,MYF(0));
my_free(buf,MYF(0));
DBUG_RETURN(result);
}
/**************************************************************************
Do a query. If query returned rows, free old rows.
Read data by mysql_store_result or by repeat call of mysql_fetch_row
**************************************************************************/
int STDCALL
mysql_query(MYSQL *mysql, const char *query)
{
return mysql_real_query(mysql,query, (uint) strlen(query));
}
static MYSQL* spawn_init(MYSQL* parent, const char* host,
unsigned int port, const char* user,
const char* passwd)
{
MYSQL* child;
if (!(child = mysql_init(0)))
return 0;
child->options.user = my_strdup((user) ? user :
(parent->user ? parent->user :
parent->options.user), MYF(0));
child->options.password = my_strdup((passwd) ? passwd :
(parent->passwd ?
parent->passwd :
parent->options.password), MYF(0));
child->options.port = port;
child->options.host = my_strdup((host) ? host :
(parent->host ?
parent->host :
parent->options.host), MYF(0));
if (parent->db)
child->options.db = my_strdup(parent->db, MYF(0));
else if (parent->options.db)
child->options.db = my_strdup(parent->options.db, MYF(0));
child->options.rpl_parse = child->options.rpl_probe = child->rpl_pivot = 0;
return child;
}
int
STDCALL mysql_set_master(MYSQL* mysql, const char* host,
unsigned int port, const char* user,
const char* passwd)
{
if (mysql->master != mysql && !mysql->master->rpl_pivot)
mysql_close(mysql->master);
if (!(mysql->master = spawn_init(mysql, host, port, user, passwd)))
return 1;
mysql->master->rpl_pivot = 0;
mysql->master->options.rpl_parse = 0;
mysql->master->options.rpl_probe = 0;
return 0;
}
int
STDCALL mysql_add_slave(MYSQL* mysql, const char* host,
unsigned int port,
const char* user,
const char* passwd)
{
MYSQL* slave;
if (!(slave = spawn_init(mysql, host, port, user, passwd)))
return 1;
slave->next_slave = mysql->next_slave;
mysql->next_slave = slave;
return 0;
}
/**************************************************************************
Return next field of the query results
**************************************************************************/
MYSQL_FIELD * STDCALL
mysql_fetch_field(MYSQL_RES *result)
{
if (result->current_field >= result->field_count)
return(NULL);
return &result->fields[result->current_field++];
}
/**************************************************************************
Get column lengths of the current row
If one uses mysql_use_result, res->lengths contains the length information,
else the lengths are calculated from the offset between pointers.
**************************************************************************/
ulong * STDCALL
mysql_fetch_lengths(MYSQL_RES *res)
{
MYSQL_ROW column;
if (!(column=res->current_row))
return 0; /* Something is wrong */
if (res->data)
(*res->methods->fetch_lengths)(res->lengths, column, res->field_count);
return res->lengths;
}
/**************************************************************************
Move to a specific row and column
**************************************************************************/
void STDCALL
mysql_data_seek(MYSQL_RES *result, my_ulonglong row)
{
MYSQL_ROWS *tmp=0;
DBUG_PRINT("info",("mysql_data_seek(%ld)",(long) row));
if (result->data)
for (tmp=result->data->data; row-- && tmp ; tmp = tmp->next) ;
result->current_row=0;
result->data_cursor = tmp;
}
/*************************************************************************
put the row or field cursor one a position one got from mysql_row_tell()
This doesn't restore any data. The next mysql_fetch_row or
mysql_fetch_field will return the next row or field after the last used
*************************************************************************/
MYSQL_ROW_OFFSET STDCALL
mysql_row_seek(MYSQL_RES *result, MYSQL_ROW_OFFSET row)
{
MYSQL_ROW_OFFSET return_value=result->data_cursor;
result->current_row= 0;
result->data_cursor= row;
return return_value;
}
MYSQL_FIELD_OFFSET STDCALL
mysql_field_seek(MYSQL_RES *result, MYSQL_FIELD_OFFSET field_offset)
{
MYSQL_FIELD_OFFSET return_value=result->current_field;
result->current_field=field_offset;
return return_value;
}
/*****************************************************************************
List all databases
*****************************************************************************/
MYSQL_RES * STDCALL
mysql_list_dbs(MYSQL *mysql, const char *wild)
{
char buff[255];
DBUG_ENTER("mysql_list_dbs");
append_wild(strmov(buff,"show databases"),buff+sizeof(buff),wild);
if (mysql_query(mysql,buff))
DBUG_RETURN(0);
DBUG_RETURN (mysql_store_result(mysql));
}
/*****************************************************************************
List all tables in a database
If wild is given then only the tables matching wild is returned
*****************************************************************************/
MYSQL_RES * STDCALL
mysql_list_tables(MYSQL *mysql, const char *wild)
{
char buff[255];
DBUG_ENTER("mysql_list_tables");
append_wild(strmov(buff,"show tables"),buff+sizeof(buff),wild);
if (mysql_query(mysql,buff))
DBUG_RETURN(0);
DBUG_RETURN (mysql_store_result(mysql));
}
/**************************************************************************
List all fields in a table
If wild is given then only the fields matching wild is returned
Instead of this use query:
show fields in 'table' like "wild"
**************************************************************************/
MYSQL_RES * STDCALL
cli_list_fields(MYSQL *mysql, const char *table, const char *wild)
{
MYSQL_RES *result;
MYSQL_DATA *query;
char buff[257],*end;
DBUG_ENTER("mysql_list_fields");
DBUG_PRINT("enter",("table: '%s' wild: '%s'",table,wild ? wild : ""));
LINT_INIT(query);
end=strmake(strmake(buff, table,128)+1,wild ? wild : "",128);
if (simple_command(mysql,COM_FIELD_LIST,buff,(ulong) (end-buff),1) ||
!(query = read_rows(mysql,(MYSQL_FIELD*) 0,
protocol_41(mysql) ? 8 : 6)))
DBUG_RETURN(NULL);
free_old_query(mysql);
if (!(result = (MYSQL_RES *) my_malloc(sizeof(MYSQL_RES),
MYF(MY_WME | MY_ZEROFILL))))
{
free_rows(query);
DBUG_RETURN(NULL);
}
result->methods= mysql->methods;
result->field_alloc=mysql->field_alloc;
mysql->fields=0;
result->field_count = (uint) query->rows;
result->fields= unpack_fields(query,&result->field_alloc,
result->field_count, 1,
mysql->server_capabilities);
result->eof=1;
DBUG_RETURN(result);
}
/* List all running processes (threads) in server */
MYSQL_RES * STDCALL
mysql_list_processes(MYSQL *mysql)
{
MYSQL_DATA *fields;
uint field_count;
uchar *pos;
DBUG_ENTER("mysql_list_processes");
LINT_INIT(fields);
if (simple_command(mysql,COM_PROCESS_INFO,0,0,0))
DBUG_RETURN(0);
free_old_query(mysql);
pos=(uchar*) mysql->net.read_pos;
field_count=(uint) net_field_length(&pos);
if (!(fields = read_rows(mysql,(MYSQL_FIELD*) 0,
protocol_41(mysql) ? 7 : 5)))
DBUG_RETURN(NULL);
if (!(mysql->fields=unpack_fields(fields,&mysql->field_alloc,field_count,0,
mysql->server_capabilities)))
DBUG_RETURN(0);
mysql->status=MYSQL_STATUS_GET_RESULT;
mysql->field_count=field_count;
DBUG_RETURN(mysql_store_result(mysql));
}
#ifdef USE_OLD_FUNCTIONS
int STDCALL
mysql_create_db(MYSQL *mysql, const char *db)
{
DBUG_ENTER("mysql_createdb");
DBUG_PRINT("enter",("db: %s",db));
DBUG_RETURN(simple_command(mysql,COM_CREATE_DB,db, (ulong) strlen(db),0));
}
int STDCALL
mysql_drop_db(MYSQL *mysql, const char *db)
{
DBUG_ENTER("mysql_drop_db");
DBUG_PRINT("enter",("db: %s",db));
DBUG_RETURN(simple_command(mysql,COM_DROP_DB,db,(ulong) strlen(db),0));
}
#endif
int STDCALL
mysql_shutdown(MYSQL *mysql)
{
DBUG_ENTER("mysql_shutdown");
DBUG_RETURN(simple_command(mysql,COM_SHUTDOWN,0,0,0));
}
int STDCALL
mysql_refresh(MYSQL *mysql,uint options)
{
uchar bits[1];
DBUG_ENTER("mysql_refresh");
bits[0]= (uchar) options;
DBUG_RETURN(simple_command(mysql,COM_REFRESH,(char*) bits,1,0));
}
int STDCALL
mysql_kill(MYSQL *mysql,ulong pid)
{
char buff[12];
DBUG_ENTER("mysql_kill");
int4store(buff,pid);
DBUG_RETURN(simple_command(mysql,COM_PROCESS_KILL,buff,4,0));
}
int STDCALL
mysql_dump_debug_info(MYSQL *mysql)
{
DBUG_ENTER("mysql_dump_debug_info");
DBUG_RETURN(simple_command(mysql,COM_DEBUG,0,0,0));
}
const char * STDCALL
mysql_stat(MYSQL *mysql)
{
DBUG_ENTER("mysql_stat");
if (simple_command(mysql,COM_STATISTICS,0,0,0))
return mysql->net.last_error;
mysql->net.read_pos[mysql->packet_length]=0; /* End of stat string */
if (!mysql->net.read_pos[0])
{
strmov(mysql->net.sqlstate, unknown_sqlstate);
mysql->net.last_errno=CR_WRONG_HOST_INFO;
strmov(mysql->net.last_error, ER(mysql->net.last_errno));
return mysql->net.last_error;
}
DBUG_RETURN((char*) mysql->net.read_pos);
}
int STDCALL
mysql_ping(MYSQL *mysql)
{
DBUG_ENTER("mysql_ping");
DBUG_RETURN(simple_command(mysql,COM_PING,0,0,0));
}
const char * STDCALL
mysql_get_server_info(MYSQL *mysql)
{
return((char*) mysql->server_version);
}
/*
Get version number for server in a form easy to test on
SYNOPSIS
mysql_get_server_version()
mysql Connection
EXAMPLE
4.1.0-alfa -> 40100
NOTES
We will ensure that a newer server always has a bigger number.
RETURN
Signed number > 323000
*/
ulong STDCALL
mysql_get_server_version(MYSQL *mysql)
{
uint major, minor, version;
char *pos= mysql->server_version, *end_pos;
major= (uint) strtoul(pos, &end_pos, 10); pos=end_pos+1;
minor= (uint) strtoul(pos, &end_pos, 10); pos=end_pos+1;
version= (uint) strtoul(pos, &end_pos, 10);
return (ulong) major*10000L+(ulong) (minor*100+version);
}
const char * STDCALL
mysql_get_host_info(MYSQL *mysql)
{
return(mysql->host_info);
}
uint STDCALL
mysql_get_proto_info(MYSQL *mysql)
{
return (mysql->protocol_version);
}
const char * STDCALL
mysql_get_client_info(void)
{
return (char*) MYSQL_SERVER_VERSION;
}
my_bool STDCALL mysql_eof(MYSQL_RES *res)
{
return res->eof;
}
MYSQL_FIELD * STDCALL mysql_fetch_field_direct(MYSQL_RES *res,uint fieldnr)
{
return &(res)->fields[fieldnr];
}
MYSQL_FIELD * STDCALL mysql_fetch_fields(MYSQL_RES *res)
{
return (res)->fields;
}
MYSQL_ROW_OFFSET STDCALL mysql_row_tell(MYSQL_RES *res)
{
return res->data_cursor;
}
MYSQL_FIELD_OFFSET STDCALL mysql_field_tell(MYSQL_RES *res)
{
return (res)->current_field;
}
/* MYSQL */
unsigned int STDCALL mysql_field_count(MYSQL *mysql)
{
return mysql->last_used_con->field_count;
}
my_ulonglong STDCALL mysql_affected_rows(MYSQL *mysql)
{
return mysql->last_used_con->affected_rows;
}
my_ulonglong STDCALL mysql_insert_id(MYSQL *mysql)
{
return mysql->last_used_con->insert_id;
}
const char *STDCALL mysql_sqlstate(MYSQL *mysql)
{
return mysql->net.sqlstate;
}
uint STDCALL mysql_warning_count(MYSQL *mysql)
{
return mysql->warning_count;
}
const char *STDCALL mysql_info(MYSQL *mysql)
{
return mysql->info;
}
ulong STDCALL mysql_thread_id(MYSQL *mysql)
{
return (mysql)->thread_id;
}
const char * STDCALL mysql_character_set_name(MYSQL *mysql)
{
return mysql->charset->name;
}
uint STDCALL mysql_thread_safe(void)
{
#ifdef THREAD
return 1;
#else
return 0;
#endif
}
/****************************************************************************
Some support functions
****************************************************************************/
/*
Functions called my my_net_init() to set some application specific variables
*/
void my_net_local_init(NET *net)
{
net->max_packet= (uint) net_buffer_length;
net->read_timeout= (uint) net_read_timeout;
net->write_timeout=(uint) net_write_timeout;
net->retry_count= 1;
net->max_packet_size= max(net_buffer_length, max_allowed_packet);
}
/*
Add escape characters to a string (blob?) to make it suitable for a insert
to should at least have place for length*2+1 chars
Returns the length of the to string
*/
ulong STDCALL
mysql_escape_string(char *to,const char *from,ulong length)
{
return mysql_sub_escape_string(default_charset_info,to,from,length);
}
ulong STDCALL
mysql_real_escape_string(MYSQL *mysql, char *to,const char *from,
ulong length)
{
return mysql_sub_escape_string(mysql->charset,to,from,length);
}
static ulong
mysql_sub_escape_string(CHARSET_INFO *charset_info, char *to,
const char *from, ulong length)
{
const char *to_start=to;
const char *end;
#ifdef USE_MB
my_bool use_mb_flag=use_mb(charset_info);
#endif
for (end=from+length; from != end ; from++)
{
#ifdef USE_MB
int l;
if (use_mb_flag && (l = my_ismbchar(charset_info, from, end)))
{
while (l--)
*to++ = *from++;
from--;
continue;
}
#endif
switch (*from) {
case 0: /* Must be escaped for 'mysql' */
*to++= '\\';
*to++= '0';
break;
case '\n': /* Must be escaped for logs */
*to++= '\\';
*to++= 'n';
break;
case '\r':
*to++= '\\';
*to++= 'r';
break;
case '\\':
*to++= '\\';
*to++= '\\';
break;
case '\'':
*to++= '\\';
*to++= '\'';
break;
case '"': /* Better safe than sorry */
*to++= '\\';
*to++= '"';
break;
case '\032': /* This gives problems on Win32 */
*to++= '\\';
*to++= 'Z';
break;
default:
*to++= *from;
}
}
*to=0;
return (ulong) (to-to_start);
}
char * STDCALL
mysql_odbc_escape_string(MYSQL *mysql,
char *to, ulong to_length,
const char *from, ulong from_length,
void *param,
char * (*extend_buffer)
(void *, char *, ulong *))
{
char *to_end=to+to_length-5;
const char *end;
#ifdef USE_MB
my_bool use_mb_flag=use_mb(mysql->charset);
#endif
for (end=from+from_length; from != end ; from++)
{
if (to >= to_end)
{
to_length = (ulong) (end-from)+512; /* We want this much more */
if (!(to=(*extend_buffer)(param, to, &to_length)))
return to;
to_end=to+to_length-5;
}
#ifdef USE_MB
{
int l;
if (use_mb_flag && (l = my_ismbchar(mysql->charset, from, end)))
{
while (l--)
*to++ = *from++;
from--;
continue;
}
}
#endif
switch (*from) {
case 0: /* Must be escaped for 'mysql' */
*to++= '\\';
*to++= '0';
break;
case '\n': /* Must be escaped for logs */
*to++= '\\';
*to++= 'n';
break;
case '\r':
*to++= '\\';
*to++= 'r';
break;
case '\\':
*to++= '\\';
*to++= '\\';
break;
case '\'':
*to++= '\\';
*to++= '\'';
break;
case '"': /* Better safe than sorry */
*to++= '\\';
*to++= '"';
break;
case '\032': /* This gives problems on Win32 */
*to++= '\\';
*to++= 'Z';
break;
default:
*to++= *from;
}
}
return to;
}
void STDCALL
myodbc_remove_escape(MYSQL *mysql,char *name)
{
char *to;
#ifdef USE_MB
my_bool use_mb_flag=use_mb(mysql->charset);
char *end;
LINT_INIT(end);
if (use_mb_flag)
for (end=name; *end ; end++) ;
#endif
for (to=name ; *name ; name++)
{
#ifdef USE_MB
int l;
if (use_mb_flag && (l = my_ismbchar( mysql->charset, name , end ) ) )
{
while (l--)
*to++ = *name++;
name--;
continue;
}
#endif
if (*name == '\\' && name[1])
name++;
*to++= *name;
}
*to=0;
}
/********************************************************************
Implementation of new client-server prototypes for 4.1 version
starts from here ..
mysql_* are real prototypes used by applications
*********************************************************************/
/********************************************************************
Misc Utility functions
********************************************************************/
/*
Set the internal stmt error messages
*/
static void set_stmt_error(MYSQL_STMT * stmt, int errcode,
const char *sqlstate)
{
DBUG_ENTER("set_stmt_error");
DBUG_PRINT("enter", ("error: %d '%s'", errcode, ER(errcode)));
DBUG_ASSERT(stmt != 0);
stmt->last_errno= errcode;
strmov(stmt->last_error, ER(errcode));
strmov(stmt->sqlstate, sqlstate);
DBUG_VOID_RETURN;
}
/*
Copy error message to statement handler
*/
static void set_stmt_errmsg(MYSQL_STMT * stmt, const char *err, int errcode,
const char *sqlstate)
{
DBUG_ENTER("set_stmt_error_msg");
DBUG_PRINT("enter", ("error: %d/%s '%s'", errcode, sqlstate, err));
DBUG_ASSERT(stmt != 0);
stmt->last_errno= errcode;
if (err && err[0])
strmov(stmt->last_error, err);
strmov(stmt->sqlstate, sqlstate);
DBUG_VOID_RETURN;
}
/*
Set the internal error message to mysql handler
*/
static void set_mysql_error(MYSQL * mysql, int errcode, const char *sqlstate)
{
DBUG_ENTER("set_mysql_error");
DBUG_PRINT("enter", ("error :%d '%s'", errcode, ER(errcode)));
DBUG_ASSERT(mysql != 0);
mysql->net.last_errno= errcode;
strmov(mysql->net.last_error, ER(errcode));
strmov(mysql->net.sqlstate, sqlstate);
}
/*
Reallocate the NET package to be at least of 'length' bytes
SYNPOSIS
my_realloc_str()
net The NET structure to modify
int length Ensure that net->buff is at least this big
RETURN VALUES
0 ok
1 Error
*/
static my_bool my_realloc_str(NET *net, ulong length)
{
ulong buf_length= (ulong) (net->write_pos - net->buff);
my_bool res=0;
DBUG_ENTER("my_realloc_str");
if (buf_length + length > net->max_packet)
{
res= net_realloc(net, buf_length + length);
net->write_pos= net->buff+ buf_length;
}
DBUG_RETURN(res);
}
/********************************************************************
Prepare related implementations
********************************************************************/
/*
Read the prepare statement results ..
NOTE
This is only called for connection to servers that supports
prepared statements (and thus the 4.1 protocol)
RETURN VALUES
0 ok
1 error
*/
my_bool STDCALL cli_read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
{
uchar *pos;
uint field_count;
ulong length, param_count;
MYSQL_DATA *fields_data;
DBUG_ENTER("cli_read_prepare_result");
mysql= mysql->last_used_con;
if ((length= net_safe_read(mysql)) == packet_error)
DBUG_RETURN(1);
pos= (uchar*) mysql->net.read_pos;
stmt->stmt_id= uint4korr(pos+1); pos+= 5;
field_count= uint2korr(pos); pos+= 2;
param_count= uint2korr(pos); pos+= 2;
if (field_count != 0)
{
if (!(mysql->server_status & SERVER_STATUS_AUTOCOMMIT))
mysql->server_status|= SERVER_STATUS_IN_TRANS;
mysql->extra_info= net_field_length_ll(&pos);
if (!(fields_data= read_rows(mysql, (MYSQL_FIELD*) 0, 7)))
DBUG_RETURN(1);
if (!(stmt->fields= unpack_fields(fields_data,&stmt->mem_root,
field_count,0,
mysql->server_capabilities)))
DBUG_RETURN(1);
}
stmt->field_count= (uint) field_count;
stmt->param_count= (ulong) param_count;
DBUG_RETURN(0);
}
/*
Prepare the query and return the new statement handle to
caller.
Also update the total parameter count along with resultset
metadata information by reading from server
*/
MYSQL_STMT *STDCALL
mysql_prepare(MYSQL *mysql, const char *query, ulong length)
{
MYSQL_STMT *stmt;
DBUG_ENTER("mysql_prepare");
DBUG_ASSERT(mysql != 0);
#ifdef CHECK_EXTRA_ARGUMENTS
if (!query)
{
set_mysql_error(mysql, CR_NULL_POINTER, unknown_sqlstate);
DBUG_RETURN(0);
}
#endif
if (!(stmt= (MYSQL_STMT *) my_malloc(sizeof(MYSQL_STMT),
MYF(MY_WME | MY_ZEROFILL))) ||
!(stmt->query= my_strdup_with_length((byte *) query, length, MYF(0))))
{
my_free((gptr) stmt, MYF(MY_ALLOW_ZERO_PTR));
set_mysql_error(mysql, CR_OUT_OF_MEMORY, unknown_sqlstate);
DBUG_RETURN(0);
}
if (simple_command(mysql, COM_PREPARE, query, length, 1))
{
stmt_close(stmt, 1);
DBUG_RETURN(0);
}
init_alloc_root(&stmt->mem_root,8192,0);
if ((*mysql->read_prepare_result)(mysql, stmt))
{
stmt_close(stmt, 1);
DBUG_RETURN(0);
}
if (!(stmt->params= (MYSQL_BIND *) alloc_root(&stmt->mem_root,
sizeof(MYSQL_BIND)*
(param_count +
field_count))))
set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
stmt->bind= stmt->params + param_count;
stmt->state= MY_ST_PREPARE;
stmt->mysql= mysql;
mysql->stmts= list_add(mysql->stmts, &stmt->list);
mysql->status= MYSQL_STATUS_READY;
stmt->list.data= stmt;
DBUG_PRINT("info", ("Parameter count: %ld", stmt->param_count));
DBUG_RETURN(stmt);
}
/*
Get the execute query meta information for non-select
statements (on demand).
*/
unsigned int alloc_stmt_fields(MYSQL_STMT *stmt)
{
MYSQL_FIELD *fields, *field, *end;
MEM_ROOT *alloc= &stmt->mem_root;
MYSQL *mysql= stmt->mysql->last_used_con;
if (stmt->state != MY_ST_EXECUTE || !mysql->field_count)
return 0;
stmt->field_count= mysql->field_count;
/*
Get the field information for non-select statements
like SHOW and DESCRIBE commands
*/
if (!(stmt->fields= (MYSQL_FIELD *) alloc_root(alloc,
sizeof(MYSQL_FIELD) *
stmt->field_count)) ||
!(stmt->bind= (MYSQL_BIND *) alloc_root(alloc,
sizeof(MYSQL_BIND) *
stmt->field_count)))
return 0;
for (fields= mysql->fields, end= fields+stmt->field_count,
field= stmt->fields;
field && fields < end; fields++, field++)
{
field->db = strdup_root(alloc,fields->db);
field->table = strdup_root(alloc,fields->table);
field->org_table= strdup_root(alloc,fields->org_table);
field->name = strdup_root(alloc,fields->name);
field->org_name = strdup_root(alloc,fields->org_name);
field->charsetnr= fields->charsetnr;
field->length = fields->length;
field->type = fields->type;
field->flags = fields->flags;
field->decimals = fields->decimals;
field->def = fields->def ? strdup_root(alloc,fields->def): 0;
field->max_length= 0;
}
return stmt->field_count;
}
/*
Returns prepared meta information in the form of resultset
to client.
*/
MYSQL_RES * STDCALL
mysql_get_metadata(MYSQL_STMT *stmt)
{
MYSQL_RES *result;
DBUG_ENTER("mysql_get_metadata");
if (!stmt->field_count || !stmt->fields)
{
if (!alloc_stmt_fields(stmt))
DBUG_RETURN(0);
}
if (!(result=(MYSQL_RES*) my_malloc(sizeof(*result)+
sizeof(ulong)*stmt->field_count,
MYF(MY_WME | MY_ZEROFILL))))
return 0;
result->methods= stmt->mysql->methods;
result->eof=1; /* Marker for buffered */
result->fields= stmt->fields;
result->field_count= stmt->field_count;
DBUG_RETURN(result);
}
/*
Returns parameter columns meta information in the form of
resultset.
*/
MYSQL_RES * STDCALL
mysql_param_result(MYSQL_STMT *stmt)
{
DBUG_ENTER("mysql_param_result");
if (!stmt->param_count)
DBUG_RETURN(0);
/*
TODO: Fix this when server sends the information.
Till then keep a dummy prototype
*/
DBUG_RETURN(0);
}
/********************************************************************
Prepare-execute, and param handling
*********************************************************************/
/*
Store the buffer type
*/
static void store_param_type(NET *net, uint type)
{
int2store(net->write_pos, type);
net->write_pos+=2;
}
/****************************************************************************
Functions to store parameter data from a prepared statement.
All functions has the following characteristics:
SYNOPSIS
store_param_xxx()
net MySQL NET connection
param MySQL bind param
RETURN VALUES
0 ok
1 Error (Can't alloc net->buffer)
****************************************************************************/
static void store_param_tinyint(NET *net, MYSQL_BIND *param)
{
*(net->write_pos++)= (uchar) *param->buffer;
}
static void store_param_short(NET *net, MYSQL_BIND *param)
{
short value= *(short*) param->buffer;
int2store(net->write_pos,value);
net->write_pos+=2;
}
static void store_param_int32(NET *net, MYSQL_BIND *param)
{
int32 value= *(int32*) param->buffer;
int4store(net->write_pos,value);
net->write_pos+=4;
}
static void store_param_int64(NET *net, MYSQL_BIND *param)
{
longlong value= *(longlong*) param->buffer;
int8store(net->write_pos,value);
net->write_pos+= 8;
}
static void store_param_float(NET *net, MYSQL_BIND *param)
{
float value= *(float*) param->buffer;
float4store(net->write_pos, value);
net->write_pos+= 4;
}
static void store_param_double(NET *net, MYSQL_BIND *param)
{
double value= *(double*) param->buffer;
float8store(net->write_pos, value);
net->write_pos+= 8;
}
static void store_param_time(NET *net, MYSQL_BIND *param)
{
MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
char buff[15], *pos;
uint length;
pos= buff+1;
pos[0]= tm->neg ? 1: 0;
int4store(pos+1, tm->day);
pos[5]= (uchar) tm->hour;
pos[6]= (uchar) tm->minute;
pos[7]= (uchar) tm->second;
int4store(pos+8, tm->second_part);
if (tm->second_part)
length= 11;
else if (tm->hour || tm->minute || tm->second || tm->day)
length= 8;
else
length= 0;
buff[0]= (char) length++;
memcpy((char *)net->write_pos, buff, length);
net->write_pos+= length;
}
static void net_store_datetime(NET *net, MYSQL_TIME *tm)
{
char buff[12], *pos;
uint length;
pos= buff+1;
int2store(pos, tm->year);
pos[2]= (uchar) tm->month;
pos[3]= (uchar) tm->day;
pos[4]= (uchar) tm->hour;
pos[5]= (uchar) tm->minute;
pos[6]= (uchar) tm->second;
int4store(pos+7, tm->second_part);
if (tm->second_part)
length= 11;
else if (tm->hour || tm->minute || tm->second)
length= 7;
else if (tm->year || tm->month || tm->day)
length= 4;
else
length= 0;
buff[0]= (char) length++;
memcpy((char *)net->write_pos, buff, length);
net->write_pos+= length;
}
static void store_param_date(NET *net, MYSQL_BIND *param)
{
MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
tm->hour= tm->minute= tm->second= 0;
tm->second_part= 0;
net_store_datetime(net, tm);
}
static void store_param_datetime(NET *net, MYSQL_BIND *param)
{
MYSQL_TIME *tm= (MYSQL_TIME *) param->buffer;
net_store_datetime(net, tm);
}
static void store_param_str(NET *net, MYSQL_BIND *param)
{
ulong length= param->length ? *param->length : param->buffer_length;
char *to= (char *) net_store_length((char *) net->write_pos, length);
memcpy(to, param->buffer, length);
net->write_pos= (uchar*) to+length;
}
/*
Mark if the parameter is NULL.
SYNOPSIS
store_param_null()
net MySQL NET connection
param MySQL bind param
DESCRIPTION
A data package starts with a string of bits where we set a bit
if a parameter is NULL
*/
static void store_param_null(NET *net, MYSQL_BIND *param)
{
uint pos= param->param_number;
net->buff[pos/8]|= (uchar) (1 << (pos & 7));
}
/*
Set parameter data by reading from input buffers from the
client application
*/
static my_bool store_param(MYSQL_STMT *stmt, MYSQL_BIND *param)
{
MYSQL *mysql= stmt->mysql;
NET *net = &mysql->net;
DBUG_ENTER("store_param");
DBUG_PRINT("enter",("type: %d, buffer:%lx, length: %lu is_null: %d",
param->buffer_type,
param->buffer ? param->buffer : "0", *param->length,
*param->is_null));
if (*param->is_null)
store_param_null(net, param);
else
{
/*
Param->length should ALWAYS point to the correct length for the type
Either to the length pointer given by the user or param->buffer_length
*/
if ((my_realloc_str(net, 9 + *param->length)))
{
set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
DBUG_RETURN(1);
}
(*param->store_param_func)(net, param);
}
DBUG_RETURN(0);
}
/*
Send the prepare query to server for execution
*/
static my_bool execute(MYSQL_STMT * stmt, char *packet, ulong length)
{
MYSQL *mysql= stmt->mysql;
NET *net= &mysql->net;
char buff[MYSQL_STMT_HEADER];
DBUG_ENTER("execute");
DBUG_PRINT("enter",("packet: %s, length :%d",packet ? packet :" ", length));
mysql->last_used_con= mysql;
int4store(buff, stmt->stmt_id); /* Send stmt id to server */
if ((*mysql->methods->advanced_command)(mysql, COM_EXECUTE, buff,
MYSQL_STMT_HEADER, packet,
length, 1) ||
mysql_read_query_result(mysql))
{
set_stmt_errmsg(stmt, net->last_error, net->last_errno, net->sqlstate);
DBUG_RETURN(1);
}
stmt->state= MY_ST_EXECUTE;
mysql_free_result(stmt->result);
stmt->result= (MYSQL_RES *)0;
stmt->result_buffered= 0;
stmt->current_row= 0;
DBUG_RETURN(0);
}
/*
Execute the prepare query
*/
int STDCALL mysql_execute(MYSQL_STMT *stmt)
{
DBUG_ENTER("mysql_execute");
if (stmt->state == MY_ST_UNKNOWN)
{
set_stmt_error(stmt, CR_NO_PREPARE_STMT, unknown_sqlstate);
DBUG_RETURN(1);
}
if (stmt->param_count)
{
NET *net= &stmt->mysql->net;
MYSQL_BIND *param, *param_end;
char *param_data;
ulong length;
uint null_count;
my_bool result;
#ifdef CHECK_EXTRA_ARGUMENTS
if (!stmt->param_buffers)
{
/* Parameters exists, but no bound buffers */
set_stmt_error(stmt, CR_NOT_ALL_PARAMS_BOUND, unknown_sqlstate);
DBUG_RETURN(1);
}
#endif
net_clear(net); /* Sets net->write_pos */
/* Reserve place for null-marker bytes */
null_count= (stmt->param_count+7) /8;
bzero((char*) net->write_pos, null_count);
net->write_pos+= null_count;
param_end= stmt->params + stmt->param_count;
/* In case if buffers (type) altered, indicate to server */
*(net->write_pos)++= (uchar) stmt->send_types_to_server;
if (stmt->send_types_to_server)
{
/*
Store types of parameters in first in first package
that is sent to the server.
*/
for (param= stmt->params; param < param_end ; param++)
store_param_type(net, (uint) param->buffer_type);
}
for (param= stmt->params; param < param_end; param++)
{
/* check if mysql_long_data() was used */
if (param->long_data_used)
param->long_data_used= 0; /* Clear for next execute call */
else if (store_param(stmt, param))
DBUG_RETURN(1);
}
length= (ulong) (net->write_pos - net->buff);
/* TODO: Look into avoding the following memdup */
if (!(param_data= my_memdup((const char*) net->buff, length, MYF(0))))
{
set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
DBUG_RETURN(1);
}
net->write_pos= net->buff; /* Reset for net_write() */
result= execute(stmt, param_data, length);
stmt->send_types_to_server=0;
my_free(param_data, MYF(MY_WME));
DBUG_RETURN(result);
}
DBUG_RETURN((int) execute(stmt,0,0));
}
/*
Return total parameters count in the statement
*/
ulong STDCALL mysql_param_count(MYSQL_STMT * stmt)
{
DBUG_ENTER("mysql_param_count");
DBUG_RETURN(stmt->param_count);
}
/*
Return total affected rows from the last statement
*/
my_ulonglong STDCALL mysql_stmt_affected_rows(MYSQL_STMT *stmt)
{
return stmt->mysql->last_used_con->affected_rows;
}
static my_bool int_is_null_true= 1; /* Used for MYSQL_TYPE_NULL */
static my_bool int_is_null_false= 0;
/*
Setup the parameter data buffers from application
*/
my_bool STDCALL mysql_bind_param(MYSQL_STMT *stmt, MYSQL_BIND * bind)
{
uint count=0;
MYSQL_BIND *param, *end;
DBUG_ENTER("mysql_bind_param");
#ifdef CHECK_EXTRA_ARGUMENTS
if (stmt->state == MY_ST_UNKNOWN)
{
set_stmt_error(stmt, CR_NO_PREPARE_STMT, unknown_sqlstate);
DBUG_RETURN(1);
}
if (!stmt->param_count)
{
set_stmt_error(stmt, CR_NO_PARAMETERS_EXISTS, unknown_sqlstate);
DBUG_RETURN(1);
}
#endif
/* Allocated on prepare */
memcpy((char*) stmt->params, (char*) bind,
sizeof(MYSQL_BIND) * stmt->param_count);
for (param= stmt->params, end= param+stmt->param_count;
param < end ;
param++)
{
param->param_number= count++;
param->long_data_used= 0;
/*
If param->length is not given, change it to point to buffer_length.
This way we can always use *param->length to get the length of data
*/
if (!param->length)
param->length= &param->buffer_length;
/* If param->is_null is not set, then the value can never be NULL */
if (!param->is_null)
param->is_null= &int_is_null_false;
/* Setup data copy functions for the different supported types */
switch (param->buffer_type) {
case MYSQL_TYPE_NULL:
param->is_null= &int_is_null_true;
break;
case MYSQL_TYPE_TINY:
/* Force param->length as this is fixed for this type */
param->length= &param->buffer_length;
param->buffer_length= 1;
param->store_param_func= store_param_tinyint;
break;
case MYSQL_TYPE_SHORT:
param->length= &param->buffer_length;
param->buffer_length= 2;
param->store_param_func= store_param_short;
break;
case MYSQL_TYPE_LONG:
param->length= &param->buffer_length;
param->buffer_length= 4;
param->store_param_func= store_param_int32;
break;
case MYSQL_TYPE_LONGLONG:
param->length= &param->buffer_length;
param->buffer_length= 8;
param->store_param_func= store_param_int64;
break;
case MYSQL_TYPE_FLOAT:
param->length= &param->buffer_length;
param->buffer_length= 4;
param->store_param_func= store_param_float;
break;
case MYSQL_TYPE_DOUBLE:
param->length= &param->buffer_length;
param->buffer_length= 8;
param->store_param_func= store_param_double;
break;
case MYSQL_TYPE_TIME:
/* Buffer length ignored for DATE, TIME and DATETIME */
param->store_param_func= store_param_time;
break;
case MYSQL_TYPE_DATE:
param->store_param_func= store_param_date;
break;
case MYSQL_TYPE_DATETIME:
case MYSQL_TYPE_TIMESTAMP:
param->store_param_func= store_param_datetime;
break;
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_BLOB:
case MYSQL_TYPE_VAR_STRING:
case MYSQL_TYPE_STRING:
param->store_param_func= store_param_str;
break;
default:
strmov(stmt->sqlstate, unknown_sqlstate);
sprintf(stmt->last_error,
ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
param->buffer_type, count);
DBUG_RETURN(1);
}
}
/* We have to send/resendtype information to MySQL */
stmt->send_types_to_server= 1;
stmt->param_buffers= 1;
DBUG_RETURN(0);
}
/********************************************************************
Long data implementation
*********************************************************************/
/*
Send long data in pieces to the server
SYNOPSIS
mysql_send_long_data()
stmt Statement handler
param_number Parameter number (0 - N-1)
data Data to send to server
length Length of data to send (may be 0)
RETURN VALUES
0 ok
1 error
*/
my_bool STDCALL
mysql_send_long_data(MYSQL_STMT *stmt, uint param_number,
const char *data, ulong length)
{
MYSQL_BIND *param;
DBUG_ENTER("mysql_send_long_data");
DBUG_ASSERT(stmt != 0);
DBUG_PRINT("enter",("param no : %d, data : %lx, length : %ld",
param_number, data, length));
if (param_number >= stmt->param_count)
{
set_stmt_error(stmt, CR_INVALID_PARAMETER_NO, unknown_sqlstate);
DBUG_RETURN(1);
}
param= stmt->params+param_number;
if (param->buffer_type < MYSQL_TYPE_TINY_BLOB ||
param->buffer_type > MYSQL_TYPE_STRING)
{
/*
Long data handling should be used only for string/binary
types only
*/
strmov(stmt->sqlstate, unknown_sqlstate);
sprintf(stmt->last_error, ER(stmt->last_errno= CR_INVALID_BUFFER_USE),
param->param_number);
DBUG_RETURN(1);
}
/* Mark for execute that the result is already sent */
param->long_data_used= 1;
if (length)
{
MYSQL *mysql= stmt->mysql;
char *packet, extra_data[MYSQL_LONG_DATA_HEADER];
packet= extra_data;
int4store(packet, stmt->stmt_id); packet+=4;
int2store(packet, param_number); packet+=2;
/*
Note that we don't get any ok packet from the server in this case
This is intentional to save bandwidth.
*/
if ((*mysql->methods->advanced_command)(mysql, COM_LONG_DATA, extra_data,
MYSQL_LONG_DATA_HEADER, data,
length, 1))
{
set_stmt_errmsg(stmt, mysql->net.last_error,
mysql->net.last_errno, mysql->net.sqlstate);
DBUG_RETURN(1);
}
}
DBUG_RETURN(0);
}
/********************************************************************
Fetch-bind related implementations
*********************************************************************/
/****************************************************************************
Functions to fetch data to application buffers
All functions has the following characteristics:
SYNOPSIS
fetch_result_xxx()
param MySQL bind param
row Row value
RETURN VALUES
0 ok
1 Error (Can't alloc net->buffer)
****************************************************************************/
static void set_zero_time(MYSQL_TIME *tm)
{
tm->year= tm->month= tm->day= 0;
tm->hour= tm->minute= tm->second= 0;
tm->second_part= 0;
tm->neg= (bool)0;
}
/* Read TIME from binary packet and return it to MYSQL_TIME */
static uint read_binary_time(MYSQL_TIME *tm, uchar **pos)
{
uchar *to;
uint length;
if (!(length= net_field_length(pos)))
{
set_zero_time(tm);
return 0;
}
to= *pos;
tm->second_part= (length > 8 ) ? (ulong) sint4korr(to+7): 0;
tm->day= (ulong) sint4korr(to+1);
tm->hour= (uint) to[5];
tm->minute= (uint) to[6];
tm->second= (uint) to[7];
tm->year= tm->month= 0;
tm->neg= (bool)to[0];
return length;
}
/* Read DATETIME from binary packet and return it to MYSQL_TIME */
static uint read_binary_datetime(MYSQL_TIME *tm, uchar **pos)
{
uchar *to;
uint length;
if (!(length= net_field_length(pos)))
{
set_zero_time(tm);
return 0;
}
to= *pos;
tm->second_part= (length > 7 ) ? (ulong) sint4korr(to+7): 0;
if (length > 4)
{
tm->hour= (uint) to[4];
tm->minute= (uint) to[5];
tm->second= (uint) to[6];
}
else
tm->hour= tm->minute= tm->second= 0;
tm->year= (uint) sint2korr(to);
tm->month= (uint) to[2];
tm->day= (uint) to[3];
tm->neg= 0;
return length;
}
/* Read DATE from binary packet and return it to MYSQL_TIME */
static uint read_binary_date(MYSQL_TIME *tm, uchar **pos)
{
uchar *to;
uint length;
if (!(length= net_field_length(pos)))
{
set_zero_time(tm);
return 0;
}
to= *pos;
tm->year = (uint) sint2korr(to);
tm->month= (uint) to[2];
tm->day= (uint) to[3];
tm->hour= tm->minute= tm->second= 0;
tm->second_part= 0;
tm->neg= 0;
return length;
}
/* Convert Numeric to buffer types */
static void send_data_long(MYSQL_BIND *param, longlong value)
{
char *buffer= param->buffer;
switch (param->buffer_type) {
case MYSQL_TYPE_NULL: /* do nothing */
break;
case MYSQL_TYPE_TINY:
*param->buffer= (uchar) value;
break;
case MYSQL_TYPE_SHORT:
int2store(buffer, value);
break;
case MYSQL_TYPE_LONG:
int4store(buffer, value);
break;
case MYSQL_TYPE_LONGLONG:
int8store(buffer, value);
break;
case MYSQL_TYPE_FLOAT:
{
float data= (float)value;
float4store(buffer, data);
break;
}
case MYSQL_TYPE_DOUBLE:
{
double data= (double)value;
float8store(buffer, data);
break;
}
default:
{
char tmp[22]; /* Enough for longlong */
uint length= (uint)(longlong10_to_str(value,(char *)tmp,10)-tmp);
ulong copy_length= min((ulong)length-param->offset, param->buffer_length);
if ((long) copy_length < 0)
copy_length=0;
else
memcpy(buffer, (char *)tmp+param->offset, copy_length);
*param->length= length;
if (copy_length != param->buffer_length)
*(buffer+copy_length)= '\0';
}
}
}
/* Convert Double to buffer types */
static void send_data_double(MYSQL_BIND *param, double value)
{
char *buffer= param->buffer;
switch(param->buffer_type) {
case MYSQL_TYPE_NULL: /* do nothing */
break;
case MYSQL_TYPE_TINY:
*buffer= (uchar)value;
break;
case MYSQL_TYPE_SHORT:
int2store(buffer, (short)value);
break;
case MYSQL_TYPE_LONG:
int4store(buffer, (long)value);
break;
case MYSQL_TYPE_LONGLONG:
int8store(buffer, (longlong)value);
break;
case MYSQL_TYPE_FLOAT:
{
float data= (float)value;
float4store(buffer, data);
break;
}
case MYSQL_TYPE_DOUBLE:
{
double data= (double)value;
float8store(buffer, data);
break;
}
default:
{
char tmp[128];
uint length= my_sprintf(tmp,(tmp,"%g",value));
ulong copy_length= min((ulong)length-param->offset, param->buffer_length);
if ((long) copy_length < 0)
copy_length=0;
else
memcpy(buffer, (char *)tmp+param->offset, copy_length);
*param->length= length;
if (copy_length != param->buffer_length)
*(buffer+copy_length)= '\0';
}
}
}
/* Convert string to buffer types */
static void send_data_str(MYSQL_BIND *param, char *value, uint length)
{
char *buffer= param->buffer;
int err=0;
switch(param->buffer_type) {
case MYSQL_TYPE_NULL: /* do nothing */
break;
case MYSQL_TYPE_TINY:
{
uchar data= (uchar)my_strntol(&my_charset_latin1,value,length,10,NULL,
&err);
*buffer= data;
break;
}
case MYSQL_TYPE_SHORT:
{
short data= (short)my_strntol(&my_charset_latin1,value,length,10,NULL,
&err);
int2store(buffer, data);
break;
}
case MYSQL_TYPE_LONG:
{
int32 data= (int32)my_strntol(&my_charset_latin1,value,length,10,NULL,
&err);
int4store(buffer, data);
break;
}
case MYSQL_TYPE_LONGLONG:
{
longlong data= my_strntoll(&my_charset_latin1,value,length,10,NULL,&err);
int8store(buffer, data);
break;
}
case MYSQL_TYPE_FLOAT:
{
float data = (float)my_strntod(&my_charset_latin1,value,length,NULL,&err);
float4store(buffer, data);
break;
}
case MYSQL_TYPE_DOUBLE:
{
double data= my_strntod(&my_charset_latin1,value,length,NULL,&err);
float8store(buffer, data);
break;
}
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_BLOB:
*param->length= length;
length= min(length-param->offset, param->buffer_length);
if ((long) length > 0)
memcpy(buffer, value+param->offset, length);
break;
default:
*param->length= length;
length= min(length-param->offset, param->buffer_length);
if ((long) length < 0)
length= 0;
else
memcpy(buffer, value+param->offset, length);
if (length != param->buffer_length)
buffer[length]= '\0';
}
}
static void send_data_time(MYSQL_BIND *param, MYSQL_TIME ltime,
uint length)
{
switch (param->buffer_type) {
case MYSQL_TYPE_NULL: /* do nothing */
break;
case MYSQL_TYPE_DATE:
case MYSQL_TYPE_TIME:
case MYSQL_TYPE_DATETIME:
case MYSQL_TYPE_TIMESTAMP:
{
MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
tm->year= ltime.year;
tm->month= ltime.month;
tm->day= ltime.day;
tm->hour= ltime.hour;
tm->minute= ltime.minute;
tm->second= ltime.second;
tm->second_part= ltime.second_part;
tm->neg= ltime.neg;
break;
}
default:
{
char buff[25];
if (!length)
ltime.time_type= MYSQL_TIMESTAMP_NONE;
switch (ltime.time_type) {
case MYSQL_TIMESTAMP_DATE:
length= my_sprintf(buff,(buff, "%04d-%02d-%02d", ltime.year,
ltime.month,ltime.day));
break;
case MYSQL_TIMESTAMP_FULL:
length= my_sprintf(buff,(buff, "%04d-%02d-%02d %02d:%02d:%02d",
ltime.year,ltime.month,ltime.day,
ltime.hour,ltime.minute,ltime.second));
break;
case MYSQL_TIMESTAMP_TIME:
length= my_sprintf(buff, (buff, "%02d:%02d:%02d",
ltime.hour,ltime.minute,ltime.second));
break;
default:
length= 0;
buff[0]='\0';
}
send_data_str(param, (char *)buff, length);
}
}
}
/* Fetch data to buffers */
static void fetch_results(MYSQL_BIND *param, MYSQL_FIELD *field, uchar **row)
{
ulong length;
enum enum_field_types field_type= field->type;
switch (field_type) {
case MYSQL_TYPE_TINY:
{
char value= (char) **row;
uint field_is_unsigned= (field->flags & UNSIGNED_FLAG);
longlong data= ((field_is_unsigned) ? (longlong) (unsigned char) value:
(longlong) value);
send_data_long(param,data);
length= 1;
break;
}
case MYSQL_TYPE_SHORT:
case MYSQL_TYPE_YEAR:
{
short value= sint2korr(*row);
uint field_is_unsigned= (field->flags & UNSIGNED_FLAG);
longlong data= ((field_is_unsigned) ? (longlong) (unsigned short) value:
(longlong) value);
send_data_long(param,data);
length= 2;
break;
}
case MYSQL_TYPE_LONG:
{
long value= sint4korr(*row);
uint field_is_unsigned= (field->flags & UNSIGNED_FLAG);
longlong data= ((field_is_unsigned) ? (longlong) (unsigned long) value:
(longlong) value);
send_data_long(param,data);
length= 4;
break;
}
case MYSQL_TYPE_LONGLONG:
{
longlong value= (longlong)sint8korr(*row);
send_data_long(param,value);
length= 8;
break;
}
case MYSQL_TYPE_FLOAT:
{
float value;
float4get(value,*row);
send_data_double(param,value);
length= 4;
break;
}
case MYSQL_TYPE_DOUBLE:
{
double value;
float8get(value,*row);
send_data_double(param,value);
length= 8;
break;
}
case MYSQL_TYPE_DATE:
{
MYSQL_TIME tm;
length= read_binary_date(&tm, row);
tm.time_type= MYSQL_TIMESTAMP_DATE;
send_data_time(param, tm, length);
break;
}
case MYSQL_TYPE_TIME:
{
MYSQL_TIME tm;
length= read_binary_time(&tm, row);
tm.time_type= MYSQL_TIMESTAMP_TIME;
send_data_time(param, tm, length);
break;
}
case MYSQL_TYPE_DATETIME:
case MYSQL_TYPE_TIMESTAMP:
{
MYSQL_TIME tm;
length= read_binary_datetime(&tm, row);
tm.time_type= MYSQL_TIMESTAMP_FULL;
send_data_time(param, tm, length);
break;
}
default:
length= net_field_length(row);
send_data_str(param,(char*) *row,length);
break;
}
*row+= length;
}
static void fetch_result_tinyint(MYSQL_BIND *param, uchar **row)
{
*param->buffer= (uchar) **row;
(*row)++;
}
static void fetch_result_short(MYSQL_BIND *param, uchar **row)
{
short value = (short)sint2korr(*row);
int2store(param->buffer, value);
*row+= 2;
}
static void fetch_result_int32(MYSQL_BIND *param, uchar **row)
{
int32 value= (int32)sint4korr(*row);
int4store(param->buffer, value);
*row+= 4;
}
static void fetch_result_int64(MYSQL_BIND *param, uchar **row)
{
longlong value= (longlong)sint8korr(*row);
int8store(param->buffer, value);
*row+= 8;
}
static void fetch_result_float(MYSQL_BIND *param, uchar **row)
{
float value;
float4get(value,*row);
float4store(param->buffer, value);
*row+= 4;
}
static void fetch_result_double(MYSQL_BIND *param, uchar **row)
{
double value;
float8get(value,*row);
float8store(param->buffer, value);
*row+= 8;
}
static void fetch_result_time(MYSQL_BIND *param, uchar **row)
{
MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
*row+= read_binary_time(tm, row);
}
static void fetch_result_date(MYSQL_BIND *param, uchar **row)
{
MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
*row+= read_binary_date(tm, row);
}
static void fetch_result_datetime(MYSQL_BIND *param, uchar **row)
{
MYSQL_TIME *tm= (MYSQL_TIME *)param->buffer;
*row+= read_binary_datetime(tm, row);
}
static void fetch_result_bin(MYSQL_BIND *param, uchar **row)
{
ulong length= net_field_length(row);
ulong copy_length= min(length, param->buffer_length);
memcpy(param->buffer, (char *)*row, copy_length);
*param->length= length;
*row+= length;
}
static void fetch_result_str(MYSQL_BIND *param, uchar **row)
{
ulong length= net_field_length(row);
ulong copy_length= min(length, param->buffer_length);
memcpy(param->buffer, (char *)*row, copy_length);
/* Add an end null if there is room in the buffer */
if (copy_length != param->buffer_length)
*(param->buffer+copy_length)= '\0';
*param->length= length; /* return total length */
*row+= length;
}
/*
Setup the bind buffers for resultset processing
*/
my_bool STDCALL mysql_bind_result(MYSQL_STMT *stmt, MYSQL_BIND *bind)
{
MYSQL_BIND *param, *end;
ulong bind_count;
uint param_count= 0;
DBUG_ENTER("mysql_bind_result");
DBUG_ASSERT(stmt != 0);
#ifdef CHECK_EXTRA_ARGUMENTS
if (stmt->state == MY_ST_UNKNOWN)
{
set_stmt_error(stmt, CR_NO_PREPARE_STMT, unknown_sqlstate);
DBUG_RETURN(1);
}
if (!bind)
{
set_stmt_error(stmt, CR_NULL_POINTER, unknown_sqlstate);
DBUG_RETURN(1);
}
#endif
if (!(bind_count= stmt->field_count) &&
!(bind_count= alloc_stmt_fields(stmt)))
DBUG_RETURN(0);
memcpy((char*) stmt->bind, (char*) bind,
sizeof(MYSQL_BIND)*bind_count);
for (param= stmt->bind, end= param+bind_count; param < end ; param++)
{
/*
Set param->is_null to point to a dummy variable if it's not set.
This is to make the excute code easier
*/
if (!param->is_null)
param->is_null= &param->internal_is_null;
if (!param->length)
param->length= &param->internal_length;
param->param_number= param_count++;
param->offset= 0;
/* Setup data copy functions for the different supported types */
switch (param->buffer_type) {
case MYSQL_TYPE_NULL: /* for dummy binds */
break;
case MYSQL_TYPE_TINY:
param->fetch_result= fetch_result_tinyint;
*param->length= 1;
break;
case MYSQL_TYPE_SHORT:
param->fetch_result= fetch_result_short;
*param->length= 2;
break;
case MYSQL_TYPE_LONG:
param->fetch_result= fetch_result_int32;
*param->length= 4;
break;
case MYSQL_TYPE_LONGLONG:
param->fetch_result= fetch_result_int64;
*param->length= 8;
break;
case MYSQL_TYPE_FLOAT:
param->fetch_result= fetch_result_float;
*param->length= 4;
break;
case MYSQL_TYPE_DOUBLE:
param->fetch_result= fetch_result_double;
*param->length= 8;
break;
case MYSQL_TYPE_TIME:
param->fetch_result= fetch_result_time;
*param->length= sizeof(MYSQL_TIME);
break;
case MYSQL_TYPE_DATE:
param->fetch_result= fetch_result_date;
*param->length= sizeof(MYSQL_TIME);
break;
case MYSQL_TYPE_DATETIME:
case MYSQL_TYPE_TIMESTAMP:
param->fetch_result= fetch_result_datetime;
*param->length= sizeof(MYSQL_TIME);
break;
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_BLOB:
DBUG_ASSERT(param->buffer_length != 0);
param->fetch_result= fetch_result_bin;
break;
case MYSQL_TYPE_VAR_STRING:
case MYSQL_TYPE_STRING:
DBUG_ASSERT(param->buffer_length != 0);
param->fetch_result= fetch_result_str;
break;
default:
strmov(stmt->sqlstate, unknown_sqlstate);
sprintf(stmt->last_error,
ER(stmt->last_errno= CR_UNSUPPORTED_PARAM_TYPE),
param->buffer_type, param_count);
DBUG_RETURN(1);
}
}
stmt->res_buffers= 1;
DBUG_RETURN(0);
}
/*
Fetch row data to bind buffers
*/
static int stmt_fetch_row(MYSQL_STMT *stmt, uchar *row)
{
MYSQL_BIND *bind, *end;
MYSQL_FIELD *field, *field_end;
uchar *null_ptr, bit;
if (!row || !stmt->res_buffers)
return 0;
null_ptr= row;
row+= (stmt->field_count+9)/8; /* skip null bits */
bit= 4; /* first 2 bits are reserved */
/* Copy complete row to application buffers */
for (bind= stmt->bind, end= (MYSQL_BIND *) bind + stmt->field_count,
field= stmt->fields,
field_end= (MYSQL_FIELD *)stmt->fields+stmt->field_count;
bind < end && field < field_end;
bind++, field++)
{
if (*null_ptr & bit)
*bind->is_null= bind->null_field= 1;
else
{
*bind->is_null= bind->null_field= 0;
bind->inter_buffer= row;
if (field->type == bind->buffer_type)
(*bind->fetch_result)(bind, &row);
else
fetch_results(bind, field, &row);
}
if (!((bit<<=1) & 255))
{
bit= 1; /* To next byte */
null_ptr++;
}
}
return 0;
}
/*
Fetch and return row data to bound buffers, if any
*/
int STDCALL mysql_fetch(MYSQL_STMT *stmt)
{
MYSQL *mysql= stmt->mysql;
uchar *row;
DBUG_ENTER("mysql_fetch");
stmt->last_fetched_column= 0; /* reset */
if (stmt->result_buffered) /* buffered */
{
MYSQL_RES *res;
if (!(res= stmt->result))
goto no_data;
if (!res->data_cursor)
{
stmt->current_row= 0;
goto no_data;
}
row= (uchar *)res->data_cursor->data;
res->data_cursor= res->data_cursor->next;
}
else /* un-buffered */
{
if (packet_error == net_safe_read(mysql))
{
set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
mysql->net.sqlstate);
DBUG_RETURN(1);
}
if (mysql->net.read_pos[0] == 254)
{
mysql->status= MYSQL_STATUS_READY;
stmt->current_row= 0;
goto no_data;
}
row= mysql->net.read_pos+1;
}
stmt->current_row= row;
DBUG_RETURN(stmt_fetch_row(stmt, row));
no_data:
DBUG_PRINT("info", ("end of data"));
DBUG_RETURN(MYSQL_NO_DATA); /* no more data */
}
/*
Fetch datat for one specified column data
SYNOPSIS
mysql_fetch_column()
stmt Prepared statement handler
bind Where date should be placed. Should be filled in as
when calling mysql_bind_param()
column Column to fetch (first column is 0)
ulong offset Offset in result data (to fetch blob in pieces)
This is normally 0
RETURN
0 ok
1 error
*/
int STDCALL mysql_fetch_column(MYSQL_STMT *stmt, MYSQL_BIND *bind,
uint column, ulong offset)
{
MYSQL_BIND *param= stmt->bind+column;
DBUG_ENTER("mysql_fetch_column");
if (!stmt->current_row)
goto no_data;
#ifdef CHECK_EXTRA_ARGUMENTS
if (column >= stmt->field_count)
{
set_stmt_errmsg(stmt, "Invalid column descriptor",1, unknown_sqlstate);
DBUG_RETURN(1);
}
#endif
if (param->null_field)
{
if (bind->is_null)
*bind->is_null= 1;
}
else
{
MYSQL_FIELD *field= stmt->fields+column;
uchar *row= param->inter_buffer;
bind->offset= offset;
if (bind->is_null)
*bind->is_null= 0;
if (bind->length) /* Set the length if non char/binary types */
*bind->length= *param->length;
else
bind->length= &param->internal_length; /* Needed for fetch_result() */
fetch_results(bind, field, &row);
}
DBUG_RETURN(0);
no_data:
DBUG_PRINT("info", ("end of data"));
DBUG_RETURN(MYSQL_NO_DATA); /* no more data */
}
/*
Read all rows of data from server (binary format)
*/
static MYSQL_DATA *read_binary_rows(MYSQL_STMT *stmt)
{
ulong pkt_len;
uchar *cp;
MYSQL *mysql= stmt->mysql;
MYSQL_DATA *result;
MYSQL_ROWS *cur, **prev_ptr;
NET *net = &mysql->net;
DBUG_ENTER("read_binary_rows");
mysql= mysql->last_used_con;
if ((pkt_len= net_safe_read(mysql)) == packet_error)
{
set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
mysql->net.sqlstate);
DBUG_RETURN(0);
}
if (mysql->net.read_pos[0] == 254) /* end of data */
return 0;
if (!(result=(MYSQL_DATA*) my_malloc(sizeof(MYSQL_DATA),
MYF(MY_WME | MY_ZEROFILL))))
{
set_stmt_errmsg(stmt, ER(CR_OUT_OF_MEMORY), CR_OUT_OF_MEMORY,
unknown_sqlstate);
DBUG_RETURN(0);
}
init_alloc_root(&result->alloc,8192,0); /* Assume rowlength < 8192 */
result->alloc.min_malloc= sizeof(MYSQL_ROWS);
prev_ptr= &result->data;
result->rows= 0;
while (*(cp=net->read_pos) != 254 || pkt_len >= 8)
{
result->rows++;
if (!(cur= (MYSQL_ROWS*) alloc_root(&result->alloc,sizeof(MYSQL_ROWS))) ||
!(cur->data= ((MYSQL_ROW) alloc_root(&result->alloc, pkt_len))))
{
free_rows(result);
set_stmt_errmsg(stmt, ER(CR_OUT_OF_MEMORY), CR_OUT_OF_MEMORY,
unknown_sqlstate);
DBUG_RETURN(0);
}
*prev_ptr= cur;
prev_ptr= &cur->next;
memcpy(cur->data, (char*)cp+1, pkt_len-1);
if ((pkt_len=net_safe_read(mysql)) == packet_error)
{
free_rows(result);
DBUG_RETURN(0);
}
}
*prev_ptr= 0;
if (pkt_len > 1)
{
mysql->warning_count= uint2korr(cp+1);
DBUG_PRINT("info",("warning_count: %ld", mysql->warning_count));
}
DBUG_PRINT("exit",("Got %d rows",result->rows));
DBUG_RETURN(result);
}
/*
Store or buffer the binary results to stmt
*/
int STDCALL mysql_stmt_store_result(MYSQL_STMT *stmt)
{
MYSQL *mysql= stmt->mysql;
MYSQL_RES *result;
DBUG_ENTER("mysql_stmt_store_result");
mysql= mysql->last_used_con;
if (!stmt->field_count)
DBUG_RETURN(0);
if (mysql->status != MYSQL_STATUS_GET_RESULT)
{
set_stmt_error(stmt, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate);
DBUG_RETURN(1);
}
mysql->status= MYSQL_STATUS_READY; /* server is ready */
if (!(result= (MYSQL_RES*) my_malloc((uint) (sizeof(MYSQL_RES)+
sizeof(ulong) *
stmt->field_count),
MYF(MY_WME | MY_ZEROFILL))))
{
set_stmt_error(stmt, CR_OUT_OF_MEMORY, unknown_sqlstate);
DBUG_RETURN(1);
}
result->methods= mysql->methods;
stmt->result_buffered= 1;
if (!(result->data= read_binary_rows(stmt)))
{
my_free((gptr) result,MYF(0));
DBUG_RETURN(0);
}
mysql->affected_rows= result->row_count= result->data->rows;
result->data_cursor= result->data->data;
result->fields= stmt->fields;
result->field_count= stmt->field_count;
stmt->result= result;
DBUG_RETURN(0); /* Data buffered, must be fetched with mysql_fetch() */
}
/*
Seek to desired row in the statement result set
*/
MYSQL_ROW_OFFSET STDCALL
mysql_stmt_row_seek(MYSQL_STMT *stmt, MYSQL_ROW_OFFSET row)
{
MYSQL_RES *result;
DBUG_ENTER("mysql_stmt_row_seek");
if ((result= stmt->result))
{
MYSQL_ROW_OFFSET return_value= result->data_cursor;
result->current_row= 0;
result->data_cursor= row;
DBUG_RETURN(return_value);
}
DBUG_PRINT("exit", ("stmt doesn't contain any resultset"));
DBUG_RETURN(0);
}
/*
Return the current statement row cursor position
*/
MYSQL_ROW_OFFSET STDCALL
mysql_stmt_row_tell(MYSQL_STMT *stmt)
{
DBUG_ENTER("mysql_stmt_row_tell");
if (stmt->result)
DBUG_RETURN(stmt->result->data_cursor);
DBUG_PRINT("exit", ("stmt doesn't contain any resultset"));
DBUG_RETURN(0);
}
/*
Move the stmt result set data cursor to specified row
*/
void STDCALL
mysql_stmt_data_seek(MYSQL_STMT *stmt, my_ulonglong row)
{
MYSQL_RES *result;
DBUG_ENTER("mysql_stmt_data_seek");
DBUG_PRINT("enter",("row id to seek: %ld",(long) row));
if ((result= stmt->result))
{
MYSQL_ROWS *tmp= 0;
if (result->data)
for (tmp=result->data->data; row-- && tmp ; tmp = tmp->next) ;
result->current_row= 0;
result->data_cursor= tmp;
}
else
DBUG_PRINT("exit", ("stmt doesn't contain any resultset"));
DBUG_VOID_RETURN;
}
/*
Return total rows the current statement result set
*/
my_ulonglong STDCALL mysql_stmt_num_rows(MYSQL_STMT *stmt)
{
DBUG_ENTER("mysql_stmt_num_rows");
if (stmt->result)
DBUG_RETURN(stmt->result->row_count);
DBUG_PRINT("exit", ("stmt doesn't contain any resultset"));
DBUG_RETURN(0);
}
/********************************************************************
statement error handling and close
*********************************************************************/
/*
Close the statement handle by freeing all alloced resources
SYNOPSIS
mysql_stmt_close()
stmt Statement handle
skip_list Flag to indicate delete from list or not
RETURN VALUES
0 ok
1 error
*/
my_bool STDCALL mysql_stmt_free_result(MYSQL_STMT *stmt)
{
MYSQL *mysql;
DBUG_ENTER("mysql_stmt_close");
DBUG_ASSERT(stmt != 0);
mysql= stmt->mysql;
if (mysql->status != MYSQL_STATUS_READY)
{
/* Clear the current execution status */
DBUG_PRINT("warning",("Not all packets read, clearing them"));
for (;;)
{
ulong pkt_len;
if ((pkt_len= net_safe_read(mysql)) == packet_error)
break;
if (pkt_len <= 8 && mysql->net.read_pos[0] == 254)
break;
}
mysql->status= MYSQL_STATUS_READY;
}
mysql_free_result(stmt->result);
stmt->result= 0;
stmt->result_buffered= 0;
stmt->current_row= 0;
DBUG_RETURN(0);
}
my_bool stmt_close(MYSQL_STMT *stmt, my_bool skip_list)
{
MYSQL *mysql;
DBUG_ENTER("mysql_stmt_close");
DBUG_ASSERT(stmt != 0);
if (!(mysql= stmt->mysql))
{
my_free((gptr) stmt, MYF(MY_WME));
DBUG_RETURN(0);
}
mysql_stmt_free_result(stmt);
if (stmt->state == MY_ST_PREPARE || stmt->state == MY_ST_EXECUTE)
{
char buff[4];
int4store(buff, stmt->stmt_id);
if (simple_command(mysql, COM_CLOSE_STMT, buff, 4, 1))
{
set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
mysql->net.sqlstate);
stmt->mysql= NULL; /* connection isn't valid anymore */
DBUG_RETURN(1);
}
}
stmt->field_count= 0;
free_root(&stmt->mem_root, MYF(0));
if (!skip_list)
mysql->stmts= list_delete(mysql->stmts, &stmt->list);
mysql->status= MYSQL_STATUS_READY;
my_free((gptr) stmt->query, MYF(MY_WME));
my_free((gptr) stmt, MYF(MY_WME));
DBUG_RETURN(0);
}
my_bool STDCALL mysql_stmt_close(MYSQL_STMT *stmt)
{
return stmt_close(stmt, 0);
}
/*
Reset the statement buffers in server
*/
my_bool STDCALL mysql_stmt_reset(MYSQL_STMT *stmt)
{
char buff[MYSQL_STMT_HEADER];
MYSQL *mysql;
DBUG_ENTER("mysql_stmt_reset");
DBUG_ASSERT(stmt != 0);
mysql= stmt->mysql->last_used_con;
int4store(buff, stmt->stmt_id); /* Send stmt id to server */
if ((*mysql->methods->advanced_command)(mysql, COM_RESET_STMT,buff,MYSQL_STMT_HEADER,0,0,1))
{
set_stmt_errmsg(stmt, mysql->net.last_error, mysql->net.last_errno,
mysql->net.sqlstate);
DBUG_RETURN(1);
}
DBUG_RETURN(0);
}
/*
Return statement error code
*/
uint STDCALL mysql_stmt_errno(MYSQL_STMT * stmt)
{
DBUG_ENTER("mysql_stmt_errno");
DBUG_RETURN(stmt->last_errno);
}
const char *STDCALL mysql_stmt_sqlstate(MYSQL_STMT * stmt)
{
DBUG_ENTER("mysql_stmt_sqlstate");
DBUG_RETURN(stmt->sqlstate);
}
/*
Return statement error message
*/
const char *STDCALL mysql_stmt_error(MYSQL_STMT * stmt)
{
DBUG_ENTER("mysql_stmt_error");
DBUG_RETURN(stmt->last_error);
}
/********************************************************************
Transactional APIs
*********************************************************************/
/*
Commit the current transaction
*/
my_bool STDCALL mysql_commit(MYSQL * mysql)
{
DBUG_ENTER("mysql_commit");
DBUG_RETURN((my_bool) mysql_real_query(mysql, "commit", 6));
}
/*
Rollback the current transaction
*/
my_bool STDCALL mysql_rollback(MYSQL * mysql)
{
DBUG_ENTER("mysql_rollback");
DBUG_RETURN((my_bool) mysql_real_query(mysql, "rollback", 8));
}
/*
Set autocommit to either true or false
*/
my_bool STDCALL mysql_autocommit(MYSQL * mysql, my_bool auto_mode)
{
DBUG_ENTER("mysql_autocommit");
DBUG_PRINT("enter", ("mode : %d", auto_mode));
if (auto_mode) /* set to true */
DBUG_RETURN((my_bool) mysql_real_query(mysql, "set autocommit=1", 16));
DBUG_RETURN((my_bool) mysql_real_query(mysql, "set autocommit=0", 16));
}
/********************************************************************
Multi query execution + SPs APIs
*********************************************************************/
/*
Returns if there are any more query results exists to be read using
mysql_next_result()
*/
my_bool STDCALL mysql_more_results(MYSQL *mysql)
{
my_bool res;
DBUG_ENTER("mysql_more_results");
res= ((mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS) ?
1: 0);
DBUG_PRINT("exit",("More results exists ? %d", res));
DBUG_RETURN(res);
}
/*
Reads and returns the next query results
*/
my_bool STDCALL mysql_next_result(MYSQL *mysql)
{
DBUG_ENTER("mysql_next_result");
mysql->net.last_error[0]= 0;
mysql->net.last_errno= 0;
strmov(mysql->net.sqlstate, not_error_sqlstate);
mysql->affected_rows= ~(my_ulonglong) 0;
if (mysql->last_used_con->server_status & SERVER_MORE_RESULTS_EXISTS)
DBUG_RETURN(mysql_read_query_result(mysql));
DBUG_RETURN(0);
}
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