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SQLGetInfo

関数
ドライバやデータソースの一般情報を取得する。
DLLODBC32.dll文字セットANSI (-A)呼出規約winapi
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シグネチャ

// ODBC32.dll  (ANSI / -A)
#include <windows.h>

SHORT SQLGetInfo(
    void* ConnectionHandle,
    WORD InfoType,
    void* InfoValue,   // optional
    SHORT BufferLength,
    SHORT* StringLengthPtr   // optional
);

パラメーター

名前型方向説明
ConnectionHandlevoid*inout情報を取得する接続ハンドル。
InfoTypeWORDin取得する情報の種別。SQL_*情報型定数を指定する。
InfoValuevoid*outoptional情報値を受け取るバッファへのポインタ。
BufferLengthSHORTinInfoValueバッファのバイト長。文字列情報で意味を持つ。
StringLengthPtrSHORT*outoptional実際に書き込まれたバイト数を受け取るポインタ。NULL可。

戻り値の型: SHORT

各言語での呼び出し定義

// ODBC32.dll  (ANSI / -A)
#include <windows.h>

SHORT SQLGetInfo(
    void* ConnectionHandle,
    WORD InfoType,
    void* InfoValue,   // optional
    SHORT BufferLength,
    SHORT* StringLengthPtr   // optional
);
[DllImport("ODBC32.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern short SQLGetInfo(
    IntPtr ConnectionHandle,   // void* in/out
    ushort InfoType,   // WORD
    IntPtr InfoValue,   // void* optional, out
    short BufferLength,   // SHORT
    IntPtr StringLengthPtr   // SHORT* optional, out
);
<DllImport("ODBC32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SQLGetInfo(
    ConnectionHandle As IntPtr,   ' void* in/out
    InfoType As UShort,   ' WORD
    InfoValue As IntPtr,   ' void* optional, out
    BufferLength As Short,   ' SHORT
    StringLengthPtr As IntPtr   ' SHORT* optional, out
) As Short
End Function
' ConnectionHandle : void* in/out
' InfoType : WORD
' InfoValue : void* optional, out
' BufferLength : SHORT
' StringLengthPtr : SHORT* optional, out
Declare PtrSafe Function SQLGetInfo Lib "odbc32" ( _
    ByVal ConnectionHandle As LongPtr, _
    ByVal InfoType As Integer, _
    ByVal InfoValue As LongPtr, _
    ByVal BufferLength As Integer, _
    ByVal StringLengthPtr As LongPtr) As Integer
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。
import ctypes
from ctypes import wintypes

SQLGetInfo = ctypes.windll.odbc32.SQLGetInfo
SQLGetInfo.restype = ctypes.c_short
SQLGetInfo.argtypes = [
    ctypes.POINTER(None),  # ConnectionHandle : void* in/out
    ctypes.c_ushort,  # InfoType : WORD
    ctypes.POINTER(None),  # InfoValue : void* optional, out
    ctypes.c_short,  # BufferLength : SHORT
    ctypes.POINTER(ctypes.c_short),  # StringLengthPtr : SHORT* optional, out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLGetInfo = Fiddle::Function.new(
  lib['SQLGetInfo'],
  [
    Fiddle::TYPE_VOIDP,  # ConnectionHandle : void* in/out
    -Fiddle::TYPE_SHORT,  # InfoType : WORD
    Fiddle::TYPE_VOIDP,  # InfoValue : void* optional, out
    Fiddle::TYPE_SHORT,  # BufferLength : SHORT
    Fiddle::TYPE_VOIDP,  # StringLengthPtr : SHORT* optional, out
  ],
  Fiddle::TYPE_SHORT)
#[link(name = "odbc32")]
extern "system" {
    fn SQLGetInfo(
        ConnectionHandle: *mut (),  // void* in/out
        InfoType: u16,  // WORD
        InfoValue: *mut (),  // void* optional, out
        BufferLength: i16,  // SHORT
        StringLengthPtr: *mut i16  // SHORT* optional, out
    ) -> i16;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[DllImport("ODBC32.dll", CharSet = CharSet.Ansi)]
public static extern short SQLGetInfo(IntPtr ConnectionHandle, ushort InfoType, IntPtr InfoValue, short BufferLength, IntPtr StringLengthPtr);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLGetInfo' -Namespace Win32 -PassThru
# $api::SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr)
#uselib "ODBC32.dll"
#func global SQLGetInfo "SQLGetInfo" sptr, sptr, sptr, sptr, sptr
; SQLGetInfo ConnectionHandle, InfoType, InfoValue, BufferLength, varptr(StringLengthPtr)   ; 戻り値は stat
; ConnectionHandle : void* in/out -> "sptr"
; InfoType : WORD -> "sptr"
; InfoValue : void* optional, out -> "sptr"
; BufferLength : SHORT -> "sptr"
; StringLengthPtr : SHORT* optional, out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。
出力引数: 
#uselib "ODBC32.dll"
#cfunc global SQLGetInfo "SQLGetInfo" sptr, int, sptr, int, var
; res = SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr)
; ConnectionHandle : void* in/out -> "sptr"
; InfoType : WORD -> "int"
; InfoValue : void* optional, out -> "sptr"
; BufferLength : SHORT -> "int"
; StringLengthPtr : SHORT* optional, out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。
出力引数: 
; SHORT SQLGetInfo(void* ConnectionHandle, WORD InfoType, void* InfoValue, SHORT BufferLength, SHORT* StringLengthPtr)
#uselib "ODBC32.dll"
#cfunc global SQLGetInfo "SQLGetInfo" intptr, int, intptr, int, var
; res = SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr)
; ConnectionHandle : void* in/out -> "intptr"
; InfoType : WORD -> "int"
; InfoValue : void* optional, out -> "intptr"
; BufferLength : SHORT -> "int"
; StringLengthPtr : SHORT* optional, out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。
import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	odbc32 = windows.NewLazySystemDLL("ODBC32.dll")
	procSQLGetInfo = odbc32.NewProc("SQLGetInfo")
)

// ConnectionHandle (void* in/out), InfoType (WORD), InfoValue (void* optional, out), BufferLength (SHORT), StringLengthPtr (SHORT* optional, out)
r1, _, err := procSQLGetInfo.Call(
	uintptr(ConnectionHandle),
	uintptr(InfoType),
	uintptr(InfoValue),
	uintptr(BufferLength),
	uintptr(StringLengthPtr),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT
function SQLGetInfo(
  ConnectionHandle: Pointer;   // void* in/out
  InfoType: Word;   // WORD
  InfoValue: Pointer;   // void* optional, out
  BufferLength: Smallint;   // SHORT
  StringLengthPtr: Pointer   // SHORT* optional, out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLGetInfo';
result := DllCall("ODBC32\SQLGetInfo"
    , "Ptr", ConnectionHandle   ; void* in/out
    , "UShort", InfoType   ; WORD
    , "Ptr", InfoValue   ; void* optional, out
    , "Short", BufferLength   ; SHORT
    , "Ptr", StringLengthPtr   ; SHORT* optional, out
    , "Short")   ; return: SHORT
●SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr) = DLL("ODBC32.dll", "int SQLGetInfo(void*, int, void*, int, void*)")
# 呼び出し: SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr)
# ConnectionHandle : void* in/out -> "void*"
# InfoType : WORD -> "int"
# InfoValue : void* optional, out -> "void*"
# BufferLength : SHORT -> "int"
# StringLengthPtr : SHORT* optional, out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。
const std = @import("std");

extern "odbc32" fn SQLGetInfo(
    ConnectionHandle: ?*anyopaque, // void* in/out
    InfoType: u16, // WORD
    InfoValue: ?*anyopaque, // void* optional, out
    BufferLength: i16, // SHORT
    StringLengthPtr: [*c]i16 // SHORT* optional, out
) callconv(std.os.windows.WINAPI) i16;
proc SQLGetInfo(
    ConnectionHandle: pointer,  # void* in/out
    InfoType: uint16,  # WORD
    InfoValue: pointer,  # void* optional, out
    BufferLength: int16,  # SHORT
    StringLengthPtr: ptr int16  # SHORT* optional, out
): int16 {.importc: "SQLGetInfo", stdcall, dynlib: "ODBC32.dll".}
pragma(lib, "odbc32");
extern(Windows)
short SQLGetInfo(
    void* ConnectionHandle,   // void* in/out
    ushort InfoType,   // WORD
    void* InfoValue,   // void* optional, out
    short BufferLength,   // SHORT
    short* StringLengthPtr   // SHORT* optional, out
);
ccall((:SQLGetInfo, "ODBC32.dll"), stdcall, Int16,
      (Ptr{Cvoid}, UInt16, Ptr{Cvoid}, Int16, Ptr{Int16}),
      ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr)
# ConnectionHandle : void* in/out -> Ptr{Cvoid}
# InfoType : WORD -> UInt16
# InfoValue : void* optional, out -> Ptr{Cvoid}
# BufferLength : SHORT -> Int16
# StringLengthPtr : SHORT* optional, out -> Ptr{Int16}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
local ffi = require("ffi")
ffi.cdef[[
int16_t SQLGetInfo(
    void* ConnectionHandle,
    uint16_t InfoType,
    void* InfoValue,
    int16_t BufferLength,
    int16_t* StringLengthPtr);
]]
local odbc32 = ffi.load("odbc32")
-- odbc32.SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr)
-- ConnectionHandle : void* in/out
-- InfoType : WORD
-- InfoValue : void* optional, out
-- BufferLength : SHORT
-- StringLengthPtr : SHORT* optional, out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
const koffi = require('koffi');
const lib = koffi.load('ODBC32.dll');
const SQLGetInfo = lib.func('__stdcall', 'SQLGetInfo', 'int16_t', ['void *', 'uint16_t', 'void *', 'int16_t', 'int16_t *']);
// SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr)
// ConnectionHandle : void* in/out -> 'void *'
// InfoType : WORD -> 'uint16_t'
// InfoValue : void* optional, out -> 'void *'
// BufferLength : SHORT -> 'int16_t'
// StringLengthPtr : SHORT* optional, out -> 'int16_t *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。
const lib = Deno.dlopen("ODBC32.dll", {
  SQLGetInfo: { parameters: ["pointer", "u16", "pointer", "i16", "pointer"], result: "i16" },
});
// lib.symbols.SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr)
// ConnectionHandle : void* in/out -> "pointer"
// InfoType : WORD -> "u16"
// InfoValue : void* optional, out -> "pointer"
// BufferLength : SHORT -> "i16"
// StringLengthPtr : SHORT* optional, out -> "pointer"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。
<?php
$ffi = FFI::cdef(<<<C
int16_t SQLGetInfo(
    void* ConnectionHandle,
    uint16_t InfoType,
    void* InfoValue,
    int16_t BufferLength,
    int16_t* StringLengthPtr);
C, "ODBC32.dll");
// $ffi->SQLGetInfo(ConnectionHandle, InfoType, InfoValue, BufferLength, StringLengthPtr);
// ConnectionHandle : void* in/out
// InfoType : WORD
// InfoValue : void* optional, out
// BufferLength : SHORT
// StringLengthPtr : SHORT* optional, out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。
import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Odbc32 extends StdCallLibrary {
    Odbc32 INSTANCE = Native.load("odbc32", Odbc32.class, W32APIOptions.ASCII_OPTIONS);
    short SQLGetInfo(
        Pointer ConnectionHandle,   // void* in/out
        short InfoType,   // WORD
        Pointer InfoValue,   // void* optional, out
        short BufferLength,   // SHORT
        ShortByReference StringLengthPtr   // SHORT* optional, out
    );
}
@[Link("odbc32")]
lib LibODBC32
  fun SQLGetInfo = SQLGetInfo(
    ConnectionHandle : Void*,   # void* in/out
    InfoType : UInt16,   # WORD
    InfoValue : Void*,   # void* optional, out
    BufferLength : Int16,   # SHORT
    StringLengthPtr : Int16*   # SHORT* optional, out
  ) : Int16
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。
import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef SQLGetInfoNative = Int16 Function(Pointer<Void>, Uint16, Pointer<Void>, Int16, Pointer<Int16>);
typedef SQLGetInfoDart = int Function(Pointer<Void>, int, Pointer<Void>, int, Pointer<Int16>);
final SQLGetInfo = DynamicLibrary.open('ODBC32.dll')
    .lookupFunction<SQLGetInfoNative, SQLGetInfoDart>('SQLGetInfo');
// ConnectionHandle : void* in/out -> Pointer<Void>
// InfoType : WORD -> Uint16
// InfoValue : void* optional, out -> Pointer<Void>
// BufferLength : SHORT -> Int16
// StringLengthPtr : SHORT* optional, out -> Pointer<Int16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
function SQLGetInfo(
  ConnectionHandle: Pointer;   // void* in/out
  InfoType: Word;   // WORD
  InfoValue: Pointer;   // void* optional, out
  BufferLength: Smallint;   // SHORT
  StringLengthPtr: Pointer   // SHORT* optional, out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLGetInfo';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "SQLGetInfo"
  c_SQLGetInfo :: Ptr () -> Word16 -> Ptr () -> Int16 -> Ptr Int16 -> IO Int16
-- ConnectionHandle : void* in/out -> Ptr ()
-- InfoType : WORD -> Word16
-- InfoValue : void* optional, out -> Ptr ()
-- BufferLength : SHORT -> Int16
-- StringLengthPtr : SHORT* optional, out -> Ptr Int16
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。
open Ctypes
open Foreign

let sqlgetinfo =
  foreign "SQLGetInfo"
    ((ptr void) @-> uint16_t @-> (ptr void) @-> int16_t @-> (ptr int16_t) @-> returning int16_t)
(* ConnectionHandle : void* in/out -> (ptr void) *)
(* InfoType : WORD -> uint16_t *)
(* InfoValue : void* optional, out -> (ptr void) *)
(* BufferLength : SHORT -> int16_t *)
(* StringLengthPtr : SHORT* optional, out -> (ptr int16_t) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)
(cffi:define-foreign-library odbc32 (t "ODBC32.dll"))
(cffi:use-foreign-library odbc32)

(cffi:defcfun ("SQLGetInfo" sqlget-info :convention :stdcall) :int16
  (connection-handle :pointer)   ; void* in/out
  (info-type :uint16)   ; WORD
  (info-value :pointer)   ; void* optional, out
  (buffer-length :int16)   ; SHORT
  (string-length-ptr :pointer))   ; SHORT* optional, out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。
use Win32::API;
my $SQLGetInfo = Win32::API::More->new('ODBC32',
    'short SQLGetInfo(LPVOID ConnectionHandle, WORD InfoType, LPVOID InfoValue, short BufferLength, LPVOID StringLengthPtr)');
# my $ret = $SQLGetInfo->Call($ConnectionHandle, $InfoType, $InfoValue, $BufferLength, $StringLengthPtr);
# ConnectionHandle : void* in/out -> LPVOID
# InfoType : WORD -> WORD
# InfoValue : void* optional, out -> LPVOID
# BufferLength : SHORT -> short
# StringLengthPtr : SHORT* optional, out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

関連項目

文字セット違い