题主模仿网上的模板写了一个C++连接MySql的代码，很久以前是成功运行了的
今天再打开运行，发现报错
明明头文件里附了的头文件，但是编译时还是报错，说
mysql_num_fields
mysql_num_rows
mysql_error
mysql_set_character_set
mysql_init
mysql_real_connect
mysql_real_query
mysql_store_result
mysql_fetch_row
一系列的mysql函数undefined
网上有说我可能没有安装mysqlclient，但如果是这样为什么我之前是运行成功的？
头文件应该是引用成功的，毕竟它没有报引用错误
用记事本打开头文件，里面也都有这些函数
附一下原码：
#define _CRT_SECURE_NO_WARNINGS
#include
#include
#include
#include
#pragma comment(lib,"libmysql.lib")
int main()
{
MYSQL mysql;
MYSQL_RES* res = NULL;
MYSQL_ROW row;
char query_str[200];
int rc, i, fields;
int rows;
if (mysql_init(&mysql) == NULL) //分配和初始化MYSQL对象
{
printf("mysql_init(): %s\n", mysql_error(&mysql));
return -1;
}
//连接数据库
if (mysql_real_connect(&mysql, "localhost", "root", "591002", "girls", 0, NULL, 0) == NULL)
{
printf("mysql_real_connect(): %s\n", mysql_error(&mysql));
return -1;
}
printf("Connected MySQL successful! \n");
//设置编码格式
mysql_set_character_set(&mysql, "gbk");
//往表中插入数据
sprintf(query_str, "insert into boys values (3,'张无忌',1000)");
rc = mysql_real_query(&mysql, query_str, strlen(query_str));
if (0 != rc) {
printf("mysql_real_query(): %s\n", mysql_error(&mysql));
return -1;
}
//往表中删除数据
sprintf(query_str, "delete from boys where boyName = '张无忌'");
rc = mysql_real_query(&mysql, query_str, strlen(query_str));
if (0 != rc) {
printf("mysql_real_query(): %s\n", mysql_error(&mysql));
return -1;
}
//往表中修改数据
sprintf(query_str, "update boys set userCP = 2000 where boyName = '张无忌'");
rc = mysql_real_query(&mysql, query_str, strlen(query_str));
if (0 != rc) {
printf("mysql_real_query(): %s\n", mysql_error(&mysql));
return -1;
}
//输出boys表的内容
sprintf(query_str, "select * from boys");
rc = mysql_real_query(&mysql, query_str, strlen(query_str));
if (0 != rc) {
printf("mysql_real_query(): %s\n", mysql_error(&mysql));
return -1;
}
res = mysql_store_result(&mysql);
if (NULL == res) {
printf("mysql_restore_result(): %s\n", mysql_error(&mysql));
return -1;
}
rows = mysql_num_rows(res);
printf("The total rows is: %d\n", rows);
fields = mysql_num_fields(res);
printf("The total fields is: %d\n", fields);
while ((row = mysql_fetch_row(res))) {
for (i = 0; i < fields; i++) {
printf("%s\t", row[i]);
}
printf("\n");
}
//关闭数据库
mysql_close(&mysql);
return 0;
}
头文件也顺便附一下：
/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
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; version 2 of the License.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
/*
This file defines the client API to MySQL and also the ABI of the
dynamically linked libmysqlclient.
The ABI should never be changed in a released product of MySQL,
thus you need to take great care when changing the file. In case
the file is changed so the ABI is broken, you must also update
the SHARED_LIB_MAJOR_VERSION in cmake/mysql_version.cmake
*/
#ifndef _mysql_h
#define _mysql_h
#ifdef _AIX /* large-file support will break without this */
#include
#endif
#ifdef CYGWIN /* CYGWIN implements a UNIX API */
#undef WIN
#undef WIN
#undef _WIN32
#undef _WIN64
#undef __WIN_
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifndef global_h /* If not standard header */
#ifndef MYSQL_ABI_CHECK
#include
#endif
#ifdef __LCC_
#include /* For windows */
#endif
typedef char my_bool;
#if (defined(_WIN32) || defined(_WIN64)) && !defined(__WIN__)
#define WIN
#endif
#if !defined(__WIN__)
#define STDCALL
#else
#define STDCALL __stdcall
#endif
#ifndef my_socket_defined
#ifdef WIN
#define my_socket SOCKET
#else
typedef int my_socket;
#endif /* WIN /
#endif / my_socket_defined /
#endif / _global_h */
#include "mysql_version.h"
#include "mysql_com.h"
#include "mysql_time.h"
#include "my_list.h" /* for LISTs used in 'MYSQL' and 'MYSQL_STMT' */
extern unsigned int mysql_port;
extern char *mysql_unix_port;
#define CLIENT_NET_READ_TIMEOUT 365*24*3600 /* Timeout on read /
#define CLIENT_NET_WRITE_TIMEOUT 365*24*3600 / Timeout on write */
#define IS_PRI_KEY(n) ((n) & PRI_KEY_FLAG)
#define IS_NOT_NULL(n) ((n) & NOT_NULL_FLAG)
#define IS_BLOB(n) ((n) & BLOB_FLAG)
/**
Returns true if the value is a number which does not need quotes for
the sql_lex.cc parser to parse correctly.
*/
#define IS_NUM(t) (((t) <= MYSQL_TYPE_INT24 && (t) != MYSQL_TYPE_TIMESTAMP) || (t) == MYSQL_TYPE_YEAR || (t) == MYSQL_TYPE_NEWDECIMAL)
#define IS_LONGDATA(t) ((t) >= MYSQL_TYPE_TINY_BLOB && (t) <= MYSQL_TYPE_STRING)
typedef struct st_mysql_field {
char name; / Name of column /
char *org_name; / Original column name, if an alias /
char *table; / Table of column if column was a field /
char *org_table; / Org table name, if table was an alias /
char *db; / Database for table /
char *catalog; / Catalog for table /
char *def; / Default value (set by mysql_list_fields) /
unsigned long length; / Width of column (create length) /
unsigned long max_length; / Max width for selected set /
unsigned int name_length;
unsigned int org_name_length;
unsigned int table_length;
unsigned int org_table_length;
unsigned int db_length;
unsigned int catalog_length;
unsigned int def_length;
unsigned int flags; / Div flags /
unsigned int decimals; / Number of decimals in field /
unsigned int charsetnr; / Character set /
enum enum_field_types type; / Type of field. See mysql_com.h for types */
void *extension;
} MYSQL_FIELD;
typedef char **MYSQL_ROW; /* return data as array of strings /
typedef unsigned int MYSQL_FIELD_OFFSET; / offset to current field */
#ifndef global_h
#if defined(NO_CLIENT_LONG_LONG)
typedef unsigned long my_ulonglong;
#elif defined (_WIN__)
typedef unsigned __int64 my_ulonglong;
#else
typedef unsigned long long my_ulonglong;
#endif
#endif
#include "typelib.h"
#define MYSQL_COUNT_ERROR (~(my_ulonglong) 0)
/* backward compatibility define - to be removed eventually */
#define ER_WARN_DATA_TRUNCATED WARN_DATA_TRUNCATED
typedef struct st_mysql_rows {
struct st_mysql_rows next; / list of rows */
MYSQL_ROW data;
unsigned long length;
} MYSQL_ROWS;
typedef MYSQL_ROWS MYSQL_ROW_OFFSET; / offset to current row */
#include "my_alloc.h"
typedef struct embedded_query_result EMBEDDED_QUERY_RESULT;
typedef struct st_mysql_data {
MYSQL_ROWS data;
struct embedded_query_result *embedded_info;
MEM_ROOT alloc;
my_ulonglong rows;
unsigned int fields;
/ extra info for embedded library */
void *extension;
} MYSQL_DATA;
enum mysql_option
{
MYSQL_OPT_CONNECT_TIMEOUT, MYSQL_OPT_COMPRESS, MYSQL_OPT_NAMED_PIPE,
MYSQL_INIT_COMMAND, MYSQL_READ_DEFAULT_FILE, MYSQL_READ_DEFAULT_GROUP,
MYSQL_SET_CHARSET_DIR, MYSQL_SET_CHARSET_NAME, MYSQL_OPT_LOCAL_INFILE,
MYSQL_OPT_PROTOCOL, MYSQL_SHARED_MEMORY_BASE_NAME, MYSQL_OPT_READ_TIMEOUT,
MYSQL_OPT_WRITE_TIMEOUT, MYSQL_OPT_USE_RESULT,
MYSQL_OPT_USE_REMOTE_CONNECTION, MYSQL_OPT_USE_EMBEDDED_CONNECTION,
MYSQL_OPT_GUESS_CONNECTION, MYSQL_SET_CLIENT_IP, MYSQL_SECURE_AUTH,
MYSQL_REPORT_DATA_TRUNCATION, MYSQL_OPT_RECONNECT,
MYSQL_OPT_SSL_VERIFY_SERVER_CERT, MYSQL_PLUGIN_DIR, MYSQL_DEFAULT_AUTH
};
/**
@todo remove the "extension", move st_mysql_options completely
out of mysql.h
*/
struct st_mysql_options_extention;
struct st_mysql_options {
unsigned int connect_timeout, read_timeout, write_timeout;
unsigned int port, protocol;
unsigned long client_flag;
char host,*user,*password,*unix_socket,*db;
struct st_dynamic_array *init_commands;
char *my_cnf_file,*my_cnf_group, *charset_dir, *charset_name;
char *ssl_key; / PEM key file /
char *ssl_cert; / PEM cert file /
char *ssl_ca; / PEM CA file /
char *ssl_capath; / PEM directory of CA-s? /
char *ssl_cipher; / cipher to use /
char *shared_memory_base_name;
unsigned long max_allowed_packet;
my_bool use_ssl; / if to use SSL or not /
my_bool compress,named_pipe;
my_bool unused1;
my_bool unused2;
my_bool unused3;
my_bool unused4;
enum mysql_option methods_to_use;
char *client_ip;
/ Refuse client connecting to server if it uses old (pre-4.1.1) protocol /
my_bool secure_auth;
/ 0 - never report, 1 - always report (default) */
my_bool report_data_truncation;
/* function pointers for local infile support /
int (*local_infile_init)(void *, const char *, void *);
int (*local_infile_read)(void *, char *, unsigned int);
void (*local_infile_end)(void *);
int (*local_infile_error)(void *, char *, unsigned int);
void *local_infile_userdata;
struct st_mysql_options_extention *extension;
};
enum mysql_status
{
MYSQL_STATUS_READY, MYSQL_STATUS_GET_RESULT, MYSQL_STATUS_USE_RESULT,
MYSQL_STATUS_STATEMENT_GET_RESULT
};
enum mysql_protocol_type
{
MYSQL_PROTOCOL_DEFAULT, MYSQL_PROTOCOL_TCP, MYSQL_PROTOCOL_SOCKET,
MYSQL_PROTOCOL_PIPE, MYSQL_PROTOCOL_MEMORY
};
typedef struct character_set
{
unsigned int number; /* character set number /
unsigned int state; / character set state /
const char *csname; / collation name /
const char *name; / character set name /
const char *comment; / comment /
const char *dir; / character set directory /
unsigned int mbminlen; / min. length for multibyte strings /
unsigned int mbmaxlen; / max. length for multibyte strings */
} MY_CHARSET_INFO;
struct st_mysql_methods;
struct st_mysql_stmt;
typedef struct st_mysql
{
NET net; /* Communication parameters /
unsigned char *connector_fd; / ConnectorFd for SSL /
char *host,*user,*passwd,*unix_socket,*server_version,*host_info;
char *info, *db;
struct charset_info_st *charset;
MYSQL_FIELD *fields;
MEM_ROOT field_alloc;
my_ulonglong affected_rows;
my_ulonglong insert_id; / id if insert on table with NEXTNR /
my_ulonglong extra_info; / Not used /
unsigned long thread_id; / Id for connection in server /
unsigned long packet_length;
unsigned int port;
unsigned long client_flag,server_capabilities;
unsigned int protocol_version;
unsigned int field_count;
unsigned int server_status;
unsigned int server_language;
unsigned int warning_count;
struct st_mysql_options options;
enum mysql_status status;
my_bool free_me; / If free in mysql_close /
my_bool reconnect; / set to 1 if automatic reconnect */
/* session-wide random string */
char scramble[SCRAMBLE_LENGTH+1];
my_bool unused1;
void *unused2, *unused3, *unused4, *unused5;
LIST stmts; / list of all statements /
const struct st_mysql_methods *methods;
void *thd;
/
Points to boolean flag in MYSQL_RES or MYSQL_STMT. We set this flag
from mysql_stmt_close if close had to cancel result set of this object.
/
my_bool *unbuffered_fetch_owner;
/ needed for embedded server - no net buffer to store the 'info' */
char *info_buffer;
void *extension;
} MYSQL;
typedef struct st_mysql_res {
my_ulonglong row_count;
MYSQL_FIELD fields;
MYSQL_DATA *data;
MYSQL_ROWS *data_cursor;
unsigned long *lengths; / column lengths of current row /
MYSQL *handle; / for unbuffered reads /
const struct st_mysql_methods *methods;
MYSQL_ROW row; / If unbuffered read /
MYSQL_ROW current_row; / buffer to current row /
MEM_ROOT field_alloc;
unsigned int field_count, current_field;
my_bool eof; / Used by mysql_fetch_row /
/ mysql_stmt_close() had to cancel this result */
my_bool unbuffered_fetch_cancelled;
void *extension;
} MYSQL_RES;
#if !defined(MYSQL_SERVER) && !defined(MYSQL_CLIENT)
#define MYSQL_CLIENT
#endif
typedef struct st_mysql_parameters
{
unsigned long *p_max_allowed_packet;
unsigned long *p_net_buffer_length;
void *extension;
} MYSQL_PARAMETERS;
#if !defined(MYSQL_SERVER) && !defined(EMBEDDED_LIBRARY)
#define max_allowed_packet (*mysql_get_parameters()->p_max_allowed_packet)
#define net_buffer_length (*mysql_get_parameters()->p_net_buffer_length)
#endif
/*
Set up and bring down the server; to ensure that applications will
work when linked against either the standard client library or the
embedded server library, these functions should be called.
*/
int STDCALL mysql_server_init(int argc, char **argv, char **groups);
void STDCALL mysql_server_end(void);
/*
mysql_server_init/end need to be called when using libmysqld or
libmysqlclient (exactly, mysql_server_init() is called by mysql_init() so
you don't need to call it explicitely; but you need to call
mysql_server_end() to free memory). The names are a bit misleading
(mysql_SERVER* to be used when using libmysqlCLIENT). So we add more general
names which suit well whether you're using libmysqld or libmysqlclient. We
intend to promote these aliases over the mysql_server* ones.
*/
#define mysql_library_init mysql_server_init
#define mysql_library_end mysql_server_end
MYSQL_PARAMETERS *STDCALL mysql_get_parameters(void);
/*
Set up and bring down a thread; these function should be called
for each thread in an application which opens at least one MySQL
connection. All uses of the connection(s) should be between these
function calls.
*/
my_bool STDCALL mysql_thread_init(void);
void STDCALL mysql_thread_end(void);
/*
Functions to get information from the MYSQL and MYSQL_RES structures
Should definitely be used if one uses shared libraries.
*/
my_ulonglong STDCALL mysql_num_rows(MYSQL_RES *res);
unsigned int STDCALL mysql_num_fields(MYSQL_RES *res);
my_bool STDCALL mysql_eof(MYSQL_RES *res);
MYSQL_FIELD *STDCALL mysql_fetch_field_direct(MYSQL_RES *res,
unsigned int fieldnr);
MYSQL_FIELD * STDCALL mysql_fetch_fields(MYSQL_RES *res);
MYSQL_ROW_OFFSET STDCALL mysql_row_tell(MYSQL_RES *res);
MYSQL_FIELD_OFFSET STDCALL mysql_field_tell(MYSQL_RES *res);
unsigned int STDCALL mysql_field_count(MYSQL *mysql);
my_ulonglong STDCALL mysql_affected_rows(MYSQL *mysql);
my_ulonglong STDCALL mysql_insert_id(MYSQL *mysql);
unsigned int STDCALL mysql_errno(MYSQL *mysql);
const char * STDCALL mysql_error(MYSQL *mysql);
const char *STDCALL mysql_sqlstate(MYSQL *mysql);
unsigned int STDCALL mysql_warning_count(MYSQL *mysql);
const char * STDCALL mysql_info(MYSQL *mysql);
unsigned long STDCALL mysql_thread_id(MYSQL *mysql);
const char * STDCALL mysql_character_set_name(MYSQL *mysql);
int STDCALL mysql_set_character_set(MYSQL *mysql, const char *csname);
MYSQL * STDCALL mysql_init(MYSQL *mysql);
my_bool STDCALL mysql_ssl_set(MYSQL *mysql, const char *key,
const char *cert, const char *ca,
const char *capath, const char *cipher);
const char * STDCALL mysql_get_ssl_cipher(MYSQL *mysql);
my_bool STDCALL mysql_change_user(MYSQL *mysql, const char *user,
const char *passwd, const char *db);
MYSQL * STDCALL mysql_real_connect(MYSQL *mysql, const char *host,
const char *user,
const char *passwd,
const char *db,
unsigned int port,
const char *unix_socket,
unsigned long clientflag);
int STDCALL mysql_select_db(MYSQL *mysql, const char *db);
int STDCALL mysql_query(MYSQL *mysql, const char *q);
int STDCALL mysql_send_query(MYSQL *mysql, const char *q,
unsigned long length);
int STDCALL mysql_real_query(MYSQL *mysql, const char *q,
unsigned long length);
MYSQL_RES * STDCALL mysql_store_result(MYSQL *mysql);
MYSQL_RES * STDCALL mysql_use_result(MYSQL *mysql);
void STDCALL mysql_get_character_set_info(MYSQL *mysql,
MY_CHARSET_INFO *charset);
/* local infile support */
#define LOCAL_INFILE_ERROR_LEN 512
void
mysql_set_local_infile_handler(MYSQL mysql,
int (*local_infile_init)(void *, const char ,
void *),
int (*local_infile_read)(void *, char *,
unsigned int),
void (*local_infile_end)(void *),
int (*local_infile_error)(void *, char,
unsigned int),
void *);
void
mysql_set_local_infile_default(MYSQL *mysql);
int STDCALL mysql_shutdown(MYSQL *mysql,
enum mysql_enum_shutdown_level
shutdown_level);
int STDCALL mysql_dump_debug_info(MYSQL *mysql);
int STDCALL mysql_refresh(MYSQL *mysql,
unsigned int refresh_options);
int STDCALL mysql_kill(MYSQL *mysql,unsigned long pid);
int STDCALL mysql_set_server_option(MYSQL *mysql,
enum enum_mysql_set_option
option);
int STDCALL mysql_ping(MYSQL *mysql);
const char * STDCALL mysql_stat(MYSQL *mysql);
const char * STDCALL mysql_get_server_info(MYSQL *mysql);
const char * STDCALL mysql_get_client_info(void);
unsigned long STDCALL mysql_get_client_version(void);
const char * STDCALL mysql_get_host_info(MYSQL *mysql);
unsigned long STDCALL mysql_get_server_version(MYSQL *mysql);
unsigned int STDCALL mysql_get_proto_info(MYSQL *mysql);
MYSQL_RES * STDCALL mysql_list_dbs(MYSQL *mysql,const char *wild);
MYSQL_RES * STDCALL mysql_list_tables(MYSQL *mysql,const char *wild);
MYSQL_RES * STDCALL mysql_list_processes(MYSQL *mysql);
int STDCALL mysql_options(MYSQL *mysql,enum mysql_option option,
const void *arg);
void STDCALL mysql_free_result(MYSQL_RES *result);
void STDCALL mysql_data_seek(MYSQL_RES *result,
my_ulonglong offset);
MYSQL_ROW_OFFSET STDCALL mysql_row_seek(MYSQL_RES *result,
MYSQL_ROW_OFFSET offset);
MYSQL_FIELD_OFFSET STDCALL mysql_field_seek(MYSQL_RES *result,
MYSQL_FIELD_OFFSET offset);
MYSQL_ROW STDCALL mysql_fetch_row(MYSQL_RES *result);
unsigned long * STDCALL mysql_fetch_lengths(MYSQL_RES *result);
MYSQL_FIELD * STDCALL mysql_fetch_field(MYSQL_RES *result);
MYSQL_RES * STDCALL mysql_list_fields(MYSQL *mysql, const char *table,
const char *wild);
unsigned long STDCALL mysql_escape_string(char *to,const char *from,
unsigned long from_length);
unsigned long STDCALL mysql_hex_string(char *to,const char *from,
unsigned long from_length);
unsigned long STDCALL mysql_real_escape_string(MYSQL *mysql,
char *to,const char *from,
unsigned long length);
void STDCALL mysql_debug(const char *debug);
void STDCALL myodbc_remove_escape(MYSQL *mysql,char *name);
unsigned int STDCALL mysql_thread_safe(void);
my_bool STDCALL mysql_embedded(void);
my_bool STDCALL mysql_read_query_result(MYSQL *mysql);
/*
The following definitions are added for the enhanced
client-server protocol
*/
/* statement state */
enum enum_mysql_stmt_state
{
MYSQL_STMT_INIT_DONE= 1, MYSQL_STMT_PREPARE_DONE, MYSQL_STMT_EXECUTE_DONE,
MYSQL_STMT_FETCH_DONE
};
/*
This structure is used to define bind information, and
internally by the client library.
Public members with their descriptions are listed below
(conventionally On input' refers to the binds given toOn output' refers to the binds given
mysql_stmt_bind_param,
to mysql_stmt_bind_result):
buffer_type - One of the MYSQL_* types, used to describe
the host language type of buffer.
On output: if column type is different from
buffer_type, column value is automatically converted
to buffer_type before it is stored in the buffer.
buffer - On input: points to the buffer with input data.
On output: points to the buffer capable to store
output data.
The type of memory pointed by buffer must correspond
to buffer_type. See the correspondence table in
the comment to mysql_stmt_bind_param.
The two above members are mandatory for any kind of bind.
buffer_length - the length of the buffer. You don't have to set
it for any fixed length buffer: float, double,
int, etc. It must be set however for variable-length
types, such as BLOBs or STRINGs.
length - On input: in case when lengths of input values
are different for each execute, you can set this to
point at a variable containining value length. This
way the value length can be different in each execute.
If length is not NULL, buffer_length is not used.
Note, length can even point at buffer_length if
you keep bind structures around while fetching:
this way you can change buffer_length before
each execution, everything will work ok.
On output: if length is set, mysql_stmt_fetch will
write column length into it.
is_null - On input: points to a boolean variable that should
be set to TRUE for NULL values.
This member is useful only if your data may be
NULL in some but not all cases.
If your data is never NULL, is_null should be set to 0.
If your data is always NULL, set buffer_type
to MYSQL_TYPE_NULL, and is_null will not be used.
is_unsigned - On input: used to signify that values provided for one
of numeric types are unsigned.
On output describes signedness of the output buffer.
If, taking into account is_unsigned flag, column data
is out of range of the output buffer, data for this column
is regarded truncated. Note that this has no correspondence
to the sign of result set column, if you need to find it out
use mysql_stmt_result_metadata.
error - where to write a truncation error if it is present.
possible error value is:
0 no truncation
1 value is out of range or buffer is too small
Please note that MYSQL_BIND also has internals members.
*/
typedef struct st_mysql_bind
{
unsigned long length; / output length pointer /
my_bool *is_null; / Pointer to null indicator /
void *buffer; / buffer to get/put data /
/ set this if you want to track data truncations happened during fetch /
my_bool *error;
unsigned char *row_ptr; / for the current data position /
void (*store_param_func)(NET *net, struct st_mysql_bind *param);
void (*fetch_result)(struct st_mysql_bind *, MYSQL_FIELD *,
unsigned char **row);
void (*skip_result)(struct st_mysql_bind *, MYSQL_FIELD *,
unsigned char **row);
/ output buffer length, must be set when fetching str/binary /
unsigned long buffer_length;
unsigned long offset; / offset position for char/binary fetch /
unsigned long length_value; / Used if length is 0 /
unsigned int param_number; / For null count and error messages /
unsigned int pack_length; / Internal length for packed data /
enum enum_field_types buffer_type; / buffer type /
my_bool error_value; / used if error is 0 /
my_bool is_unsigned; / set if integer type is unsigned /
my_bool long_data_used; / If used with mysql_send_long_data /
my_bool is_null_value; / Used if is_null is 0 */
void *extension;
} MYSQL_BIND;
struct st_mysql_stmt_extension;
/* statement handler /
typedef struct st_mysql_stmt
{
MEM_ROOT mem_root; / root allocations /
LIST list; / list to keep track of all stmts /
MYSQL *mysql; / connection handle /
MYSQL_BIND *params; / input parameters /
MYSQL_BIND *bind; / output parameters /
MYSQL_FIELD *fields; / result set metadata /
MYSQL_DATA result; / cached result set /
MYSQL_ROWS *data_cursor; / current row in cached result /
/
mysql_stmt_fetch() calls this function to fetch one row (it's different
for buffered, unbuffered and cursor fetch).
/
int (*read_row_func)(struct st_mysql_stmt *stmt,
unsigned char **row);
/ copy of mysql->affected_rows after statement execution /
my_ulonglong affected_rows;
my_ulonglong insert_id; / copy of mysql->insert_id /
unsigned long stmt_id; / Id for prepared statement /
unsigned long flags; / i.e. type of cursor to open /
unsigned long prefetch_rows; / number of rows per one COM_FETCH /
/
Copied from mysql->server_status after execute/fetch to know
server-side cursor status for this statement.
/
unsigned int server_status;
unsigned int last_errno; / error code /
unsigned int param_count; / input parameter count /
unsigned int field_count; / number of columns in result set /
enum enum_mysql_stmt_state state; / statement state /
char last_error[MYSQL_ERRMSG_SIZE]; / error message /
char sqlstate[SQLSTATE_LENGTH+1];
/ Types of input parameters should be sent to server /
my_bool send_types_to_server;
my_bool bind_param_done; / input buffers were supplied /
unsigned char bind_result_done; / output buffers were supplied /
/ mysql_stmt_close() had to cancel this result /
my_bool unbuffered_fetch_cancelled;
/
Is set to true if we need to calculate field->max_length for
metadata fields when doing mysql_stmt_store_result.
*/
my_bool update_max_length;
struct st_mysql_stmt_extension *extension;
} MYSQL_STMT;
enum enum_stmt_attr_type
{
/*
When doing mysql_stmt_store_result calculate max_length attribute
of statement metadata. This is to be consistent with the old API,
where this was done automatically.
In the new API we do that only by request because it slows down
mysql_stmt_store_result sufficiently.
/
STMT_ATTR_UPDATE_MAX_LENGTH,
/
unsigned long with combination of cursor flags (read only, for update,
etc)
/
STMT_ATTR_CURSOR_TYPE,
/
Amount of rows to retrieve from server per one fetch if using cursors.
Accepts unsigned long attribute in the range 1 - ulong_max
*/
STMT_ATTR_PREFETCH_ROWS
};
MYSQL_STMT * STDCALL mysql_stmt_init(MYSQL *mysql);
int STDCALL mysql_stmt_prepare(MYSQL_STMT *stmt, const char *query,
unsigned long length);
int STDCALL mysql_stmt_execute(MYSQL_STMT *stmt);
int STDCALL mysql_stmt_fetch(MYSQL_STMT *stmt);
int STDCALL mysql_stmt_fetch_column(MYSQL_STMT *stmt, MYSQL_BIND *bind_arg,
unsigned int column,
unsigned long offset);
int STDCALL mysql_stmt_store_result(MYSQL_STMT *stmt);
unsigned long STDCALL mysql_stmt_param_count(MYSQL_STMT * stmt);
my_bool STDCALL mysql_stmt_attr_set(MYSQL_STMT *stmt,
enum enum_stmt_attr_type attr_type,
const void *attr);
my_bool STDCALL mysql_stmt_attr_get(MYSQL_STMT *stmt,
enum enum_stmt_attr_type attr_type,
void *attr);
my_bool STDCALL mysql_stmt_bind_param(MYSQL_STMT * stmt, MYSQL_BIND * bnd);
my_bool STDCALL mysql_stmt_bind_result(MYSQL_STMT * stmt, MYSQL_BIND * bnd);
my_bool STDCALL mysql_stmt_close(MYSQL_STMT * stmt);
my_bool STDCALL mysql_stmt_reset(MYSQL_STMT * stmt);
my_bool STDCALL mysql_stmt_free_result(MYSQL_STMT *stmt);
my_bool STDCALL mysql_stmt_send_long_data(MYSQL_STMT *stmt,
unsigned int param_number,
const char *data,
unsigned long length);
MYSQL_RES *STDCALL mysql_stmt_result_metadata(MYSQL_STMT *stmt);
MYSQL_RES *STDCALL mysql_stmt_param_metadata(MYSQL_STMT *stmt);
unsigned int STDCALL mysql_stmt_errno(MYSQL_STMT * stmt);
const char *STDCALL mysql_stmt_error(MYSQL_STMT * stmt);
const char *STDCALL mysql_stmt_sqlstate(MYSQL_STMT * stmt);
MYSQL_ROW_OFFSET STDCALL mysql_stmt_row_seek(MYSQL_STMT *stmt,
MYSQL_ROW_OFFSET offset);
MYSQL_ROW_OFFSET STDCALL mysql_stmt_row_tell(MYSQL_STMT *stmt);
void STDCALL mysql_stmt_data_seek(MYSQL_STMT *stmt, my_ulonglong offset);
my_ulonglong STDCALL mysql_stmt_num_rows(MYSQL_STMT *stmt);
my_ulonglong STDCALL mysql_stmt_affected_rows(MYSQL_STMT *stmt);
my_ulonglong STDCALL mysql_stmt_insert_id(MYSQL_STMT *stmt);
unsigned int STDCALL mysql_stmt_field_count(MYSQL_STMT *stmt);
my_bool STDCALL mysql_commit(MYSQL * mysql);
my_bool STDCALL mysql_rollback(MYSQL * mysql);
my_bool STDCALL mysql_autocommit(MYSQL * mysql, my_bool auto_mode);
my_bool STDCALL mysql_more_results(MYSQL *mysql);
int STDCALL mysql_next_result(MYSQL *mysql);
int STDCALL mysql_stmt_next_result(MYSQL_STMT *stmt);
void STDCALL mysql_close(MYSQL *sock);
/* status return codes */
#define MYSQL_NO_DATA 100
#define MYSQL_DATA_TRUNCATED 101
#define mysql_reload(mysql) mysql_refresh((mysql),REFRESH_GRANT)
#ifdef USE_OLD_FUNCTIONS
MYSQL * STDCALL mysql_connect(MYSQL *mysql, const char *host,
const char *user, const char *passwd);
int STDCALL mysql_create_db(MYSQL *mysql, const char *DB);
int STDCALL mysql_drop_db(MYSQL *mysql, const char *DB);
#endif
#define HAVE_MYSQL_REAL_CONNECT
#ifdef __cplusplus
}
#endif
#endif /* _mysql_h */
