背景：我想在项目中使用 mysql.c 的 Delphi 翻译，但原始维护者 Matthias Fichtner ( http://www.fichtner.net/delphi/mysql/ ) 似乎已将其删除。
问题：有谁知道libmySQL.dll的类似包装器（或 Matthias Fichtner 的包装器的更新版本）在轻量级性质上相似？
jamiei
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5 回答
7
原来的 URL http://www.fichtner.net/delphi/mysql现在重定向到这里：http ://www.audio-data.de/mysql.html
这似乎是比吉姆发布的版本更新得多的版本。
mysql.pas（版本 2009-09-13）
使用 LibMySql.dll 或 LibMySqld.dll（嵌入式 MYSQL 服务器）的 MySQL AB 的 SQL 数据库服务器的客户端 API。它是 mysql.h 和其他一些为 MySQL 数据库服务器编写客户端所需的 C 头文件的 Pascal 翻译。
该单元经过以下测试：
- 德尔福版本：(3)、(4)、5、6、2007、2009、2010。
- LibMySql.dll 版本：3.23、4.0、4.1、5.0、5.1、6.0
- MySQL 服务器版本：3.23、4.0、4.1、5.0、5.1
于 2011-05-04T13:45:24.217 回答
5
// -----------------------------------------------------------------------------------------------
//
// MySQL Client API for Borland Delphi (version 4 and above)
//
// Pascal Interface Unit for libmySQL.dll, the
// Client Library for MySQL AB's SQL Database Server
//
// This is a literal translation of relevant parts of MySQL AB's
// C header files, mysql.h, mysql_com.h, and mysql_version.h
//
// Copyright (c) 1999-2002 Matthias Fichtner
// (see license.txt for licensing information)
//
// -----------------------------------------------------------------------------------------------
// See mysql.h for MySQL AB's copyright and GPL notice
// -----------------------------------------------------------------------------------------------
//
// 17-Aug-1999 mf Translated mysql.h MySQL 3.22.24
// 19-Aug-1999 mf Corrected some type definitions MySQL 3.22.24
// 20-Aug-1999 mf Finished debugging the unit MySQL 3.22.24
// 18-Sep-1999 mf Code maintenance for release 3.22.26a MySQL 3.22.26a
// 22-Oct-1999 mf Code maintenance for release 3.22.28 MySQL 3.22.28
// 02-Jan-2000 mf Code maintenance for release 3.22.29 MySQL 3.22.29
// 21-Jan-2000 mf Code maintenance for release 3.22.30 MySQL 3.22.30
// 07-Feb-2000 mf Code maintenance for release 3.22.31 MySQL 3.22.31
// 16-Feb-2000 mf Code maintenance for release 3.22.32 MySQL 3.22.32
// 13-Aug-2000 mf Code maintenance for release 3.22.34 MySQL 3.22.34
// 14-Aug-2000 mf Reworked entire unit for first 3.23 release MySQL 3.23.19-beta
// 14-Aug-2000 mf Added mysql_character_set_name() MySQL 3.23.22-beta
// 11-Sep-2000 mf Added IS_NUM_FIELD and INTERNAL_NUM_FIELD MySQL 3.23.24-beta
// 08-Oct-2000 mf Modified TMEM_ROOT, enum_server_command, MySQL 3.23.25-beta
// and INTERNAL_NUM_FIELD
// 01-Nov-2000 mf Code maintenance for release 3.23.27 MySQL 3.23.27-beta
// 25-Nov-2000 mf Code maintenance for release 3.23.28 MySQL 3.23.28-gamma
// 05-Jan-2001 mf Code maintenance for release 3.23.30 MySQL 3.23.30-gamma
// 19-Jan-2001 mf Code maintenance for release 3.23.31 MySQL 3.23.31
// 11-Mar-2001 mf Added functions mysql_real_send_query(), MySQL 3.23.33
// mysql_send_query(), and mysql_reap_query()
// 28-Mai-2001 mf Modified mysql_send_query(), removed MySQL 3.23.38
// mysql_real_send_query(), mysql_reap_query(),
// added mysql_read_query_result(), and fixed
// CLIENT_TRANSACTIONS
// 07-Aug-2001 mf Code maintenance for release 3.23.40 MySQL 3.23.40
// 23-Sep-2001 mf Code maintenance for release 3.23.42 MySQL 3.23.42
// 29-Jan-2002 mf Added libmysql_load(), libmysql_free(), MySQL 3.23.47
// libmysql_status and LIBMYSQL_ constants
// for dynamic loading of libmySQL.dll
// 11-Mar-2002 mf Added MYSQL_OPT_LOCAL_INFILE to mysql_option MySQL 3.23.49
//
// -----------------------------------------------------------------------------------------------
//
// Latest releases of mysql.pas are made available through the
// distribution site at: http://www.fichtner.net/delphi/mysql/
//
// Please send questions, bug reports, and suggestions regarding
// mysql.pas to Matthias Fichtner <mfichtner@fichtner-meyer.com>
//
// See readme.txt for an introduction and documentation.
// See license.txt for licensing information and disclaimer.
//
// -----------------------------------------------------------------------------------------------
// This unit is provided "as is". Use it at your own risk.
// -----------------------------------------------------------------------------------------------
unit mysql;
// -----------------------------------------------------------------------------------------------
INTERFACE
// -----------------------------------------------------------------------------------------------
uses
Windows, // Needed for some type definitions
Winsock; // Needed for some type definitions
// ----------------
// From mysql.h ...
// ----------------
type
my_bool = byte;
gptr = pChar;
type
PUSED_MEM = ^TUSED_MEM; // struct for once_alloc
TUSED_MEM = record
next: PUSED_MEM; // Next block in use
left: longword; // memory left in block
size: longword; // size of block
end;
type
error_proc = procedure;
type
PMEM_ROOT = ^TMEM_ROOT;
TMEM_ROOT = record
free: PUSED_MEM;
used: PUSED_MEM;
pre_alloc: PUSED_MEM;
min_malloc: longword;
block_size: longword;
error_handler: error_proc;
end;
type
my_socket = TSocket;
// --------------------
// From mysql_com.h ...
// --------------------
const
NAME_LEN = 64; // Field/table name length
HOSTNAME_LENGTH = 60;
USERNAME_LENGTH = 16;
SERVER_VERSION_LENGTH = 60;
LOCAL_HOST = 'localhost';
LOCAL_HOST_NAMEDPIPE = '.';
MYSQL_NAMEDPIPE = 'MySQL';
MYSQL_SERVICENAME = 'MySql';
type
enum_server_command = (
COM_SLEEP, COM_QUIT, COM_INIT_DB, COM_QUERY,
COM_FIELD_LIST, COM_CREATE_DB, COM_DROP_DB, COM_REFRESH,
COM_SHUTDOWN, COM_STATISTICS,
COM_PROCESS_INFO, COM_CONNECT, COM_PROCESS_KILL,
COM_DEBUG, COM_PING, COM_TIME, COM_DELAYED_INSERT,
COM_CHANGE_USER, COM_BINLOG_DUMP,
COM_TABLE_DUMP, COM_CONNECT_OUT
);
const
NOT_NULL_FLAG = 1; // Field can't be NULL
PRI_KEY_FLAG = 2; // Field is part of a primary key
UNIQUE_KEY_FLAG = 4; // Field is part of a unique key
MULTIPLE_KEY_FLAG = 8; // Field is part of a key
BLOB_FLAG = 16; // Field is a blob
UNSIGNED_FLAG = 32; // Field is unsigned
ZEROFILL_FLAG = 64; // Field is zerofill
BINARY_FLAG = 128;
// The following are only sent to new clients
ENUM_FLAG = 256; // field is an enum
AUTO_INCREMENT_FLAG = 512; // field is a autoincrement field
TIMESTAMP_FLAG = 1024; // Field is a timestamp
SET_FLAG = 2048; // field is a set
NUM_FLAG = 32768; // Field is num (for clients)
PART_KEY_FLAG = 16384; // Intern; Part of some key
GROUP_FLAG = 32768; // Intern: Group field
UNIQUE_FLAG = 65536; // Intern: Used by sql_yacc
REFRESH_GRANT = 1; // Refresh grant tables
REFRESH_LOG = 2; // Start on new log file
REFRESH_TABLES = 4; // close all tables
REFRESH_HOSTS = 8; // Flush host cache
REFRESH_STATUS = 16; // Flush status variables
REFRESH_THREADS = 32; // Flush status variables
REFRESH_SLAVE = 64; // Reset master info and restart slave
// thread
REFRESH_MASTER = 128; // Remove all bin logs in the index
// and truncate the index
// The following can't be set with mysql_refresh()
REFRESH_READ_LOCK = 16384; // Lock tables for read
REFRESH_FAST = 32768; // Intern flag
CLIENT_LONG_PASSWORD = 1; // new more secure passwords
CLIENT_FOUND_ROWS = 2; // Found instead of affected rows
CLIENT_LONG_FLAG = 4; // Get all column flags
CLIENT_CONNECT_WITH_DB = 8; // One can specify db on connect
CLIENT_NO_SCHEMA = 16; // Don't allow database.table.column
CLIENT_COMPRESS = 32; // Can use compression protcol
CLIENT_ODBC = 64; // Odbc client
CLIENT_LOCAL_FILES = 128; // Can use LOAD DATA LOCAL
CLIENT_IGNORE_SPACE = 256; // Ignore spaces before '('
CLIENT_INTERACTIVE = 1024; // This is an interactive client
CLIENT_SSL = 2048; // Switch to SSL after handshake
CLIENT_IGNORE_SIGPIPE = 4096; // IGNORE sigpipes
CLIENT_TRANSACTIONS = 8192; // Client knows about transactions
SERVER_STATUS_IN_TRANS = 1; // Transaction has started
SERVER_STATUS_AUTOCOMMIT = 2; // Server in auto_commit mode
MYSQL_ERRMSG_SIZE = 200;
NET_READ_TIMEOUT = 30; // Timeout on read
NET_WRITE_TIMEOUT = 60; // Timeout on write
NET_WAIT_TIMEOUT = 8*60*60; // Wait for new query
type
PVio = ^TVio;
TVio = record
end;
type
PNET = ^TNET;
TNET = record
vio: PVio;
fd: my_socket;
fcntl: longint;
buff, buff_end, write_pos, read_pos: pByte;
last_error: array [0..MYSQL_ERRMSG_SIZE - 1] of char;
last_errno, max_packet, timeout, pkt_nr: longword;
error: byte;
return_errno, compress: my_bool;
no_send_ok: my_bool; // needed if we are doing several
// queries in one command ( as in LOAD TABLE ... FROM MASTER ),
// and do not want to confuse the client with OK at the wrong time
remain_in_buf, length, buf_length, where_b: longword;
return_status: pLongword;
reading_or_writing: byte;
save_char: char;
end;
const
packet_error: longword = $ffffffff;
const
FIELD_TYPE_DECIMAL = 0;
FIELD_TYPE_TINY = 1;
FIELD_TYPE_SHORT = 2;
FIELD_TYPE_LONG = 3;
FIELD_TYPE_FLOAT = 4;
FIELD_TYPE_DOUBLE = 5;
FIELD_TYPE_NULL = 6;
FIELD_TYPE_TIMESTAMP = 7;
FIELD_TYPE_LONGLONG = 8;
FIELD_TYPE_INT24 = 9;
FIELD_TYPE_DATE = 10;
FIELD_TYPE_TIME = 11;
FIELD_TYPE_DATETIME = 12;
FIELD_TYPE_YEAR = 13;
FIELD_TYPE_NEWDATE = 14;
FIELD_TYPE_ENUM = 247;
FIELD_TYPE_SET = 248;
FIELD_TYPE_TINY_BLOB = 249;
FIELD_TYPE_MEDIUM_BLOB = 250;
FIELD_TYPE_LONG_BLOB = 251;
FIELD_TYPE_BLOB = 252;
FIELD_TYPE_VAR_STRING = 253;
FIELD_TYPE_STRING = 254;
const
FIELD_TYPE_CHAR = FIELD_TYPE_TINY; // For compability
FIELD_TYPE_INTERVAL = FIELD_TYPE_ENUM; // For compability
type
enum_field_types = FIELD_TYPE_DECIMAL..FIELD_TYPE_STRING;
// ------------------------
// From mysql_version.h ...
// ------------------------
const
PROTOCOL_VERSION = 10;
MYSQL_SERVER_VERSION = '3.23.49';
MYSQL_SERVER_SUFFIX = '';
FRM_VER = 6;
MYSQL_VERSION_ID = 32349;
MYSQL_PORT = 3306;
MYSQL_UNIX_ADDR = '/tmp/mysql.sock';
// ----------------
// From mysql.h ...
// ----------------
function IS_PRI_KEY(n: longword): boolean;
function IS_NOT_NULL(n: longword): boolean;
function IS_BLOB(n: longword): boolean;
function IS_NUM(t: longword): boolean;
type
PMYSQL_FIELD = ^TMYSQL_FIELD;
TMYSQL_FIELD = record
name: pChar; // Name of column
table: pChar; // Table of column if column was a field
def: pChar; // Default value (set by mysql_list_fields)
_type: enum_field_types; // Type of field. Se mysql_com.h for types
length: longword; // Width of column
max_length: longword; // Max width of selected set
flags: longword; // Div flags
decimals: longword; // Number of decimals in field
end;
function IS_NUM_FIELD(f: PMYSQL_FIELD): boolean;
function INTERNAL_NUM_FIELD(f: PMYSQL_FIELD): boolean;
type
PMYSQL_ROW = ^TMYSQL_ROW; // return data as array of strings
TMYSQL_ROW = array[0..MaxInt div SizeOf(pChar) - 1] of pChar;
type
MYSQL_FIELD_OFFSET = longword; // offset to current field
type
my_ulonglong = int64;
const
MYSQL_COUNT_ERROR: my_ulonglong = not 0;
type
PMYSQL_ROWS = ^TMYSQL_ROWS;
TMYSQL_ROWS = record
next: PMYSQL_ROWS; // list of rows
data: PMYSQL_ROW;
end;
type
MYSQL_ROW_OFFSET = PMYSQL_ROWS; // offset to current row
type
PMYSQL_DATA = ^TMYSQL_DATA;
TMYSQL_DATA = record
rows: my_ulonglong;
fields: longword;
data: PMYSQL_ROWS;
alloc: TMEM_ROOT;
end;
type
PMYSQL_OPTIONS = ^TMYSQL_OPTIONS;
TMYSQL_OPTIONS = record
connect_timeout, client_flag: longword;
compress, named_pipe: my_bool;
port: longword;
host, init_command, user, password, unix_socket, db: pChar;
my_cnf_file, my_cnf_group, charset_dir, charset_name: pChar;
use_ssl: my_bool; // if to use SSL or not
ssl_key: pChar; // PEM key file
ssl_cert: pChar; // PEM cert file
ssl_ca: pChar; // PEM CA file
ssl_capath: pChar; // PEM directory of CA-s?
end;
type
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
);
type
mysql_status = (
MYSQL_STATUS_READY, MYSQL_STATUS_GET_RESULT,
MYSQL_STATUS_USE_RESULT
);
type
PMYSQL_FIELDS = ^TMYSQL_FIELDS;
TMYSQL_FIELDS = array[0..MaxInt div SizeOf(TMYSQL_FIELD) - 1] of TMYSQL_FIELD;
type
PCHARSET_INFO = ^TCHARSET_INFO;
TCHARSET_INFO = record
// Omitted: Structure not necessarily needed.
// Definition of struct charset_info_st can be
// found in include/m_ctype.h
end;
type
PMYSQL = ^TMYSQL;
TMYSQL = record
net: TNET; // Communication parameters
connector_fd: gptr; // ConnectorFd for SSL
host, user, passwd, unix_socket, server_version, host_info, info, db: pChar;
port, client_flag, server_capabilities: longword;
protocol_version: longword;
field_count: longword;
server_status: longword;
thread_id: longword; // Id for connection in server
affected_rows: my_ulonglong;
insert_id: my_ulonglong; // id if insert on table with NEXTNR
extra_info: my_ulonglong; // Used by mysqlshow
packet_length: longword;
status: mysql_status;
fields: PMYSQL_FIELDS;
field_alloc: TMEM_ROOT;
free_me: my_bool; // If free in mysql_close
reconnect: my_bool; // set to 1 if automatic reconnect
options: TMYSQL_OPTIONS;
scramble_buff: array [0..8] of char;
charset: PCHARSET_INFO;
server_language: longword;
end;
type
PMYSQL_RES = ^TMYSQL_RES;
TMYSQL_RES = record
row_count: my_ulonglong;
field_count, current_field: longword;
fields: PMYSQL_FIELDS;
data: PMYSQL_DATA;
data_cursor: PMYSQL_ROWS;
field_alloc: TMEM_ROOT;
row: PMYSQL_ROW; // If unbuffered read
current_row: PMYSQL_ROW; // buffer to current row
lengths: pLongword; // column lengths of current row
handle: PMYSQL; // for unbuffered reads
eof: my_bool; // Used my mysql_fetch_row
end;
// Functions to get information from the MYSQL and MYSQL_RES structures
// Should definitely be used if one uses shared libraries
var
mysql_num_rows: function(res: PMYSQL_RES): my_ulonglong; stdcall;
mysql_num_fields: function(res: PMYSQL_RES): longword; stdcall;
mysql_eof: function(res: PMYSQL_RES): my_bool; stdcall;
mysql_fetch_field_direct: function(res: PMYSQL_RES; fieldnr: longword): PMYSQL_FIELD; stdcall;
mysql_fetch_fields: function(res: PMYSQL_RES): PMYSQL_FIELDS; stdcall;
mysql_row_tell: function(res: PMYSQL_RES): PMYSQL_ROWS; stdcall;
mysql_field_tell: function(res: PMYSQL_RES): longword; stdcall;
var
mysql_field_count: function(_mysql: PMYSQL): longword; stdcall;
mysql_affected_rows: function(_mysql: PMYSQL): my_ulonglong; stdcall;
mysql_insert_id: function(_mysql: PMYSQL): my_ulonglong; stdcall;
mysql_errno: function(_mysql: PMYSQL): longword; stdcall;
mysql_error: function(_mysql: PMYSQL): pChar; stdcall;
mysql_info: function(_mysql: PMYSQL): pChar; stdcall;
mysql_thread_id: function(_mysql: PMYSQL): longword; stdcall;
mysql_character_set_name: function(_mysql: PMYSQL): pChar; stdcall;
type
PMYSQL_LENGTHS = ^TMYSQL_LENGTHS;
TMYSQL_LENGTHS = array[0..MaxInt div SizeOf(longword) - 1] of longword;
type
extend_buffer_func = function(void: pointer; _to: pChar; length: pLongword): pChar;
var
mysql_init: function(_mysql: PMYSQL): PMYSQL; stdcall;
{$IFDEF HAVE_OPENSSL}
mysql_ssl_set: function(_mysql: PMYSQL; const key, cert, ca, capath: pChar): longint; stdcall;
mysql_ssl_cipher: function(_mysql: PMYSQL): pChar; stdcall;
mysql_ssl_clear: function(_mysql: PMYSQL): longint; stdcall;
{$ENDIF} // HAVE_OPENSSL
mysql_connect: function(_mysql: PMYSQL; const host, user, passwd: pChar): PMYSQL; stdcall;
mysql_change_user: function(_mysql: PMYSQL; const user, passwd, db: pChar): my_bool; stdcall;
mysql_real_connect: function(_mysql: PMYSQL; const host, user, passwd, db: pChar; port: longword; const unix_socket: pChar; clientflag: longword): PMYSQL; stdcall;
mysql_close: procedure(sock: PMYSQL); stdcall;
mysql_select_db: function(_mysql: PMYSQL; const db: pChar): longint; stdcall;
mysql_query: function(_mysql: PMYSQL; const q: pChar): longint; stdcall;
mysql_send_query: function(_mysql: PMYSQL; const q: pChar; length: longword): longint; stdcall;
mysql_read_query_result: function(_mysql: PMYSQL): longint; stdcall;
mysql_real_query: function(_mysql: PMYSQL; const q: pChar; length: longword): longint; stdcall;
mysql_create_db: function(_mysql: PMYSQL; const DB: pChar): longint; stdcall;
mysql_drop_db: function(_mysql: PMYSQL; const DB: pChar): longint; stdcall;
mysql_shutdown: function(_mysql: PMYSQL): longint; stdcall;
mysql_dump_debug_info: function(_mysql: PMYSQL): longint; stdcall;
mysql_refresh: function(_mysql: PMYSQL; refresh_options: longword): longint; stdcall;
mysql_kill: function(_mysql: PMYSQL; pid: longword): longint; stdcall;
mysql_ping: function(_mysql: PMYSQL): longint; stdcall;
mysql_stat: function(_mysql: PMYSQL): pChar; stdcall;
mysql_get_server_info: function(_mysql: PMYSQL): pChar; stdcall;
mysql_get_client_info: function: pChar; stdcall;
mysql_get_host_info: function(_mysql: PMYSQL): pChar; stdcall;
mysql_get_proto_info: function(_mysql: PMYSQL): longword; stdcall;
mysql_list_dbs: function(_mysql: PMYSQL; const wild: pChar): PMYSQL_RES; stdcall;
mysql_list_tables: function(_mysql: PMYSQL; const wild: pChar): PMYSQL_RES; stdcall;
mysql_list_fields: function(_mysql: PMYSQL; const table, wild: pChar): PMYSQL_RES; stdcall;
mysql_list_processes: function(_mysql: PMYSQL): PMYSQL_RES; stdcall;
mysql_store_result: function(_mysql: PMYSQL): PMYSQL_RES; stdcall;
mysql_use_result: function(_mysql: PMYSQL): PMYSQL_RES; stdcall;
mysql_options: function(_mysql: PMYSQL; option: mysql_option; const arg: pChar): longint; stdcall;
mysql_free_result: procedure(result: PMYSQL_RES); stdcall;
mysql_data_seek: procedure(result: PMYSQL_RES; offset: my_ulonglong); stdcall;
mysql_row_seek: function(result: PMYSQL_RES; offset: MYSQL_ROW_OFFSET): MYSQL_ROW_OFFSET; stdcall;
mysql_field_seek: function(result: PMYSQL_RES; offset: MYSQL_FIELD_OFFSET): MYSQL_FIELD_OFFSET; stdcall;
mysql_fetch_row: function(result: PMYSQL_RES): PMYSQL_ROW; stdcall;
mysql_fetch_lengths: function(result: PMYSQL_RES): PMYSQL_LENGTHS; stdcall;
mysql_fetch_field: function(result: PMYSQL_RES): PMYSQL_FIELD; stdcall;
mysql_escape_string: function(_to: pChar; const from: pChar; from_length: longword): longword; stdcall;
mysql_real_escape_string: function(_mysql: PMYSQL; _to: pChar; const from: pChar; length: longword): longword; stdcall;
mysql_debug: procedure(const debug: pChar); stdcall;
mysql_odbc_escape_string: function(_mysql: PMYSQL; _to: pChar; to_length: longword; const from: pChar; from_length: longword; param: pointer; extend_buffer: extend_buffer_func): pChar; stdcall;
myodbc_remove_escape: procedure(_mysql: PMYSQL; name: pChar); stdcall;
mysql_thread_safe: function: longword; stdcall;
function mysql_reload(_mysql: PMySQL): longint;
// Status codes for libmySQL.dll
const
LIBMYSQL_UNDEFINED = 0; // libmysql_load() has not yet been called
LIBMYSQL_MISSING = 1; // No suitable DLL could be located
LIBMYSQL_INCOMPATIBLE = 2; // A DLL was found but it is not compatible
LIBMYSQL_READY = 3; // The DLL was loaded successfully
var
libmysql_handle: HMODULE = 0;
libmysql_status: byte = LIBMYSQL_UNDEFINED;
function libmysql_load(name: pChar): byte;
procedure libmysql_free;
// -----------------------------------------------------------------------------------------------
IMPLEMENTATION
// -----------------------------------------------------------------------------------------------
function IS_PRI_KEY(n: longword): boolean;
begin
Result := (n and PRI_KEY_FLAG) = PRI_KEY_FLAG;
end;
function IS_NOT_NULL(n: longword): boolean;
begin
Result := (n and NOT_NULL_FLAG) = NOT_NULL_FLAG;
end;
function IS_BLOB(n: longword): boolean;
begin
Result := (n and BLOB_FLAG) = BLOB_FLAG;
end;
function IS_NUM(t: longword): boolean;
begin
Result := (t <= FIELD_TYPE_INT24) or (t = FIELD_TYPE_YEAR);
end;
function IS_NUM_FIELD(f: PMYSQL_FIELD): boolean;
begin
Result := (f.flags and NUM_FLAG) = NUM_FLAG;
end;
function INTERNAL_NUM_FIELD(f: PMYSQL_FIELD): boolean;
begin
Result := (((f._type <= FIELD_TYPE_INT24) and ((f._type <> FIELD_TYPE_TIMESTAMP) or (f.length = 14) or (f.length = 8))) or (f._type = FIELD_TYPE_YEAR));
end;
function mysql_reload(_mysql: PMYSQL): longint;
begin
Result := mysql_refresh(_mysql, REFRESH_GRANT);
end;
function libmysql_load(name: pChar): byte;
procedure assign_proc(var proc: FARPROC; name: pChar);
begin
proc := GetProcAddress(libmysql_handle, name);
if proc = nil then libmysql_status := LIBMYSQL_INCOMPATIBLE;
end;
begin
libmysql_free;
if name = nil then name := 'libmysql.dll';
libmysql_handle := LoadLibrary(name);
if libmysql_handle = 0 then libmysql_status := LIBMYSQL_MISSING
else begin
libmysql_status := LIBMYSQL_READY;
assign_proc(@mysql_num_rows, 'mysql_num_rows');
assign_proc(@mysql_num_fields, 'mysql_num_fields');
assign_proc(@mysql_eof, 'mysql_eof');
assign_proc(@mysql_fetch_field_direct, 'mysql_fetch_field_direct');
assign_proc(@mysql_fetch_fields, 'mysql_fetch_fields');
assign_proc(@mysql_row_tell, 'mysql_row_tell');
assign_proc(@mysql_field_tell, 'mysql_field_tell');
assign_proc(@mysql_field_count, 'mysql_field_count');
assign_proc(@mysql_affected_rows, 'mysql_affected_rows');
assign_proc(@mysql_insert_id, 'mysql_insert_id');
assign_proc(@mysql_errno, 'mysql_errno');
assign_proc(@mysql_error, 'mysql_error');
assign_proc(@mysql_info, 'mysql_info');
assign_proc(@mysql_thread_id, 'mysql_thread_id');
assign_proc(@mysql_character_set_name, 'mysql_character_set_name');
assign_proc(@mysql_init, 'mysql_init');
{$IFDEF HAVE_OPENSSL}
assign_proc(@mysql_ssl_set, 'mysql_ssl_set');
assign_proc(@mysql_ssl_cipher, 'mysql_ssl_cipher');
assign_proc(@mysql_ssl_clear, 'mysql_ssl_clear');
{$ENDIF} // HAVE_OPENSSL
assign_proc(@mysql_connect, 'mysql_connect');
assign_proc(@mysql_change_user, 'mysql_change_user');
assign_proc(@mysql_real_connect, 'mysql_real_connect');
assign_proc(@mysql_close, 'mysql_close');
assign_proc(@mysql_select_db, 'mysql_select_db');
assign_proc(@mysql_query, 'mysql_query');
assign_proc(@mysql_send_query, 'mysql_send_query');
assign_proc(@mysql_read_query_result, 'mysql_read_query_result');
assign_proc(@mysql_real_query, 'mysql_real_query');
assign_proc(@mysql_create_db, 'mysql_create_db');
assign_proc(@mysql_drop_db, 'mysql_drop_db');
assign_proc(@mysql_shutdown, 'mysql_shutdown');
assign_proc(@mysql_dump_debug_info, 'mysql_dump_debug_info');
assign_proc(@mysql_refresh, 'mysql_refresh');
assign_proc(@mysql_kill, 'mysql_kill');
assign_proc(@mysql_ping, 'mysql_ping');
assign_proc(@mysql_stat, 'mysql_stat');
assign_proc(@mysql_get_server_info, 'mysql_get_server_info');
assign_proc(@mysql_get_client_info, 'mysql_get_client_info');
assign_proc(@mysql_get_host_info, 'mysql_get_host_info');
assign_proc(@mysql_get_proto_info, 'mysql_get_proto_info');
assign_proc(@mysql_list_dbs, 'mysql_list_dbs');
assign_proc(@mysql_list_tables, 'mysql_list_tables');
assign_proc(@mysql_list_fields, 'mysql_list_fields');
assign_proc(@mysql_list_processes, 'mysql_list_processes');
assign_proc(@mysql_store_result, 'mysql_store_result');
assign_proc(@mysql_use_result, 'mysql_use_result');
assign_proc(@mysql_options, 'mysql_options');
assign_proc(@mysql_free_result, 'mysql_free_result');
assign_proc(@mysql_data_seek, 'mysql_data_seek');
assign_proc(@mysql_row_seek, 'mysql_row_seek');
assign_proc(@mysql_field_seek, 'mysql_field_seek');
assign_proc(@mysql_fetch_row, 'mysql_fetch_row');
assign_proc(@mysql_fetch_lengths, 'mysql_fetch_lengths');
assign_proc(@mysql_fetch_field, 'mysql_fetch_field');
assign_proc(@mysql_escape_string, 'mysql_escape_string');
assign_proc(@mysql_real_escape_string, 'mysql_real_escape_string');
assign_proc(@mysql_debug, 'mysql_debug');
assign_proc(@mysql_odbc_escape_string, 'mysql_odbc_escape_string');
assign_proc(@myodbc_remove_escape, 'myodbc_remove_escape');
assign_proc(@mysql_thread_safe, 'mysql_thread_safe');
end;
Result := libmysql_status;
end;
procedure libmysql_free;
begin
if libmysql_handle <> 0 then FreeLibrary(libmysql_handle);
libmysql_handle := 0;
libmysql_status := LIBMYSQL_UNDEFINED;
end;
// -----------------------------------------------------------------------------------------------
INITIALIZATION
// -----------------------------------------------------------------------------------------------
begin
{$IFNDEF DONT_LOAD_DLL}
libmysql_load(nil);
{$ENDIF} // DONT_LOAD_DLL
end;
// -----------------------------------------------------------------------------------------------
FINALIZATION
// -----------------------------------------------------------------------------------------------
begin
libmysql_free;
end;
end.
于 2009-01-17T23:50:41.097 回答
4
TMySQL5组件提供对 MySQL 最新生产服务器 MySQL server 5.0 的快速访问。它只需要 libmysql.dll、MySQL5.pas 和 mysql.pas（感谢 Matthias Fichtner 使 mysql.pas 可用）。
目前这个组件最多只支持 500 行和 10 个字段。但是，您可以在语句 Dataset: array[1..n, 1..m] 中更改此值以满足您的要求。
只有两种数据类型可用 String 和 Integer，但是，您可以使用标准数据转换函数转换数据。
- 功能齐全
- 来源：包括
- 包括Exe-Demo
好通过 Delphi 2006
于 2009-01-17T17:50:57.110 回答
4
我一直使用Zeoslib与 MySQL 进行通信。它使用 libmySQL.dll，我个人非常喜欢它。
尽管它不仅仅是包装 libmysql，它仍然非常轻量级。你甚至可以让它连接到 libmysqld，在你的应用程序中嵌入一个 mysql 引擎（无需连接到外部或本地 mysql 服务器）。
于 2009-01-17T18:51:53.833 回答
2
这是我为 HeidiSQL 开发的类似单元： https ://code.google.com/p/heidisql/source/browse/trunk/source/dbconnection.pas 。
It supports nearly all MySQL releases, even detects some other flavors as MariaDB, TokuDB, Percona, InfiniDB and InfoBright. Also, it supports Microsoft SQL Server and PostgreSQL.
The unit mainly contains 2 classes called TDBConnection and TDBQuery, and for both one derived class for each supported RDBMS.
However, the downside is it has some few dependencies to other units within the HeidiSQL sources, which you will need to break.
于 2014-10-05T08:15:26.013 回答