SQLColumns

関数

指定テーブルの列情報一覧を結果セットとして返す。

DLLODBC32.dll文字セットANSI (-A)呼出規約winapi

シグネチャ

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

SHORT SQLColumns(
    void* StatementHandle,
    BYTE* CatalogName,   // optional
    SHORT NameLength1,
    BYTE* SchemaName,   // optional
    SHORT NameLength2,
    BYTE* TableName,   // optional
    SHORT NameLength3,
    BYTE* ColumnName,   // optional
    SHORT NameLength4
);

パラメーター

名前	型	方向	説明
StatementHandle	void*	inout	対象のステートメントハンドル(HSTMT)。
CatalogName	BYTE*	inoptional	検索対象のカタログ名。NULLまたは空で全カタログ。
NameLength1	SHORT	in	CatalogNameの長さ(文字数)。SQL_NTSで終端まで。
SchemaName	BYTE*	inoptional	検索対象のスキーマ名。パターン指定可。
NameLength2	SHORT	in	SchemaNameの長さ。SQL_NTSで終端まで。
TableName	BYTE*	inoptional	検索対象のテーブル名。パターン指定可。
NameLength3	SHORT	in	TableNameの長さ。SQL_NTSで終端まで。
ColumnName	BYTE*	inoptional	検索対象の列名。パターン指定可。
NameLength4	SHORT	in	ColumnNameの長さ。SQL_NTSで終端まで。

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 SQLColumns(
    void* StatementHandle,
    BYTE* CatalogName,   // optional
    SHORT NameLength1,
    BYTE* SchemaName,   // optional
    SHORT NameLength2,
    BYTE* TableName,   // optional
    SHORT NameLength3,
    BYTE* ColumnName,   // optional
    SHORT NameLength4
);

[DllImport("ODBC32.dll", CharSet = CharSet.Ansi, ExactSpelling = true)]
static extern short SQLColumns(
    IntPtr StatementHandle,   // void* in/out
    IntPtr CatalogName,   // BYTE* optional
    short NameLength1,   // SHORT
    IntPtr SchemaName,   // BYTE* optional
    short NameLength2,   // SHORT
    IntPtr TableName,   // BYTE* optional
    short NameLength3,   // SHORT
    IntPtr ColumnName,   // BYTE* optional
    short NameLength4   // SHORT
);

<DllImport("ODBC32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SQLColumns(
    StatementHandle As IntPtr,   ' void* in/out
    CatalogName As IntPtr,   ' BYTE* optional
    NameLength1 As Short,   ' SHORT
    SchemaName As IntPtr,   ' BYTE* optional
    NameLength2 As Short,   ' SHORT
    TableName As IntPtr,   ' BYTE* optional
    NameLength3 As Short,   ' SHORT
    ColumnName As IntPtr,   ' BYTE* optional
    NameLength4 As Short   ' SHORT
) As Short
End Function

' StatementHandle : void* in/out
' CatalogName : BYTE* optional
' NameLength1 : SHORT
' SchemaName : BYTE* optional
' NameLength2 : SHORT
' TableName : BYTE* optional
' NameLength3 : SHORT
' ColumnName : BYTE* optional
' NameLength4 : SHORT
Declare PtrSafe Function SQLColumns Lib "odbc32" ( _
    ByVal StatementHandle As LongPtr, _
    ByVal CatalogName As LongPtr, _
    ByVal NameLength1 As Integer, _
    ByVal SchemaName As LongPtr, _
    ByVal NameLength2 As Integer, _
    ByVal TableName As LongPtr, _
    ByVal NameLength3 As Integer, _
    ByVal ColumnName As LongPtr, _
    ByVal NameLength4 As Integer) As Integer
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SQLColumns = ctypes.windll.odbc32.SQLColumns
SQLColumns.restype = ctypes.c_short
SQLColumns.argtypes = [
    ctypes.POINTER(None),  # StatementHandle : void* in/out
    ctypes.POINTER(ctypes.c_ubyte),  # CatalogName : BYTE* optional
    ctypes.c_short,  # NameLength1 : SHORT
    ctypes.POINTER(ctypes.c_ubyte),  # SchemaName : BYTE* optional
    ctypes.c_short,  # NameLength2 : SHORT
    ctypes.POINTER(ctypes.c_ubyte),  # TableName : BYTE* optional
    ctypes.c_short,  # NameLength3 : SHORT
    ctypes.POINTER(ctypes.c_ubyte),  # ColumnName : BYTE* optional
    ctypes.c_short,  # NameLength4 : SHORT
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLColumns = Fiddle::Function.new(
  lib['SQLColumns'],
  [
    Fiddle::TYPE_VOIDP,  # StatementHandle : void* in/out
    Fiddle::TYPE_VOIDP,  # CatalogName : BYTE* optional
    Fiddle::TYPE_SHORT,  # NameLength1 : SHORT
    Fiddle::TYPE_VOIDP,  # SchemaName : BYTE* optional
    Fiddle::TYPE_SHORT,  # NameLength2 : SHORT
    Fiddle::TYPE_VOIDP,  # TableName : BYTE* optional
    Fiddle::TYPE_SHORT,  # NameLength3 : SHORT
    Fiddle::TYPE_VOIDP,  # ColumnName : BYTE* optional
    Fiddle::TYPE_SHORT,  # NameLength4 : SHORT
  ],
  Fiddle::TYPE_SHORT)

#[link(name = "odbc32")]
extern "system" {
    fn SQLColumns(
        StatementHandle: *mut (),  // void* in/out
        CatalogName: *mut u8,  // BYTE* optional
        NameLength1: i16,  // SHORT
        SchemaName: *mut u8,  // BYTE* optional
        NameLength2: i16,  // SHORT
        TableName: *mut u8,  // BYTE* optional
        NameLength3: i16,  // SHORT
        ColumnName: *mut u8,  // BYTE* optional
        NameLength4: i16  // SHORT
    ) -> i16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ODBC32.dll", CharSet = CharSet.Ansi)]
public static extern short SQLColumns(IntPtr StatementHandle, IntPtr CatalogName, short NameLength1, IntPtr SchemaName, short NameLength2, IntPtr TableName, short NameLength3, IntPtr ColumnName, short NameLength4);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLColumns' -Namespace Win32 -PassThru
# $api::SQLColumns(StatementHandle, CatalogName, NameLength1, SchemaName, NameLength2, TableName, NameLength3, ColumnName, NameLength4)

#uselib "ODBC32.dll"
#func global SQLColumns "SQLColumns" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; SQLColumns StatementHandle, varptr(CatalogName), NameLength1, varptr(SchemaName), NameLength2, varptr(TableName), NameLength3, varptr(ColumnName), NameLength4   ; 戻り値は stat
; StatementHandle : void* in/out -> "sptr"
; CatalogName : BYTE* optional -> "sptr"
; NameLength1 : SHORT -> "sptr"
; SchemaName : BYTE* optional -> "sptr"
; NameLength2 : SHORT -> "sptr"
; TableName : BYTE* optional -> "sptr"
; NameLength3 : SHORT -> "sptr"
; ColumnName : BYTE* optional -> "sptr"
; NameLength4 : SHORT -> "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 SQLColumns "SQLColumns" sptr, var, int, var, int, var, int, var, int
; res = SQLColumns(StatementHandle, CatalogName, NameLength1, SchemaName, NameLength2, TableName, NameLength3, ColumnName, NameLength4)
; StatementHandle : void* in/out -> "sptr"
; CatalogName : BYTE* optional -> "var"
; NameLength1 : SHORT -> "int"
; SchemaName : BYTE* optional -> "var"
; NameLength2 : SHORT -> "int"
; TableName : BYTE* optional -> "var"
; NameLength3 : SHORT -> "int"
; ColumnName : BYTE* optional -> "var"
; NameLength4 : SHORT -> "int"
; ※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。#uselib "ODBC32.dll"
#cfunc global SQLColumns "SQLColumns" sptr, sptr, int, sptr, int, sptr, int, sptr, int
; res = SQLColumns(StatementHandle, varptr(CatalogName), NameLength1, varptr(SchemaName), NameLength2, varptr(TableName), NameLength3, varptr(ColumnName), NameLength4)
; StatementHandle : void* in/out -> "sptr"
; CatalogName : BYTE* optional -> "sptr"
; NameLength1 : SHORT -> "int"
; SchemaName : BYTE* optional -> "sptr"
; NameLength2 : SHORT -> "int"
; TableName : BYTE* optional -> "sptr"
; NameLength3 : SHORT -> "int"
; ColumnName : BYTE* optional -> "sptr"
; NameLength4 : SHORT -> "int"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; SHORT SQLColumns(void* StatementHandle, BYTE* CatalogName, SHORT NameLength1, BYTE* SchemaName, SHORT NameLength2, BYTE* TableName, SHORT NameLength3, BYTE* ColumnName, SHORT NameLength4)
#uselib "ODBC32.dll"
#cfunc global SQLColumns "SQLColumns" intptr, var, int, var, int, var, int, var, int
; res = SQLColumns(StatementHandle, CatalogName, NameLength1, SchemaName, NameLength2, TableName, NameLength3, ColumnName, NameLength4)
; StatementHandle : void* in/out -> "intptr"
; CatalogName : BYTE* optional -> "var"
; NameLength1 : SHORT -> "int"
; SchemaName : BYTE* optional -> "var"
; NameLength2 : SHORT -> "int"
; TableName : BYTE* optional -> "var"
; NameLength3 : SHORT -> "int"
; ColumnName : BYTE* optional -> "var"
; NameLength4 : SHORT -> "int"
; ※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。; SHORT SQLColumns(void* StatementHandle, BYTE* CatalogName, SHORT NameLength1, BYTE* SchemaName, SHORT NameLength2, BYTE* TableName, SHORT NameLength3, BYTE* ColumnName, SHORT NameLength4)
#uselib "ODBC32.dll"
#cfunc global SQLColumns "SQLColumns" intptr, intptr, int, intptr, int, intptr, int, intptr, int
; res = SQLColumns(StatementHandle, varptr(CatalogName), NameLength1, varptr(SchemaName), NameLength2, varptr(TableName), NameLength3, varptr(ColumnName), NameLength4)
; StatementHandle : void* in/out -> "intptr"
; CatalogName : BYTE* optional -> "intptr"
; NameLength1 : SHORT -> "int"
; SchemaName : BYTE* optional -> "intptr"
; NameLength2 : SHORT -> "int"
; TableName : BYTE* optional -> "intptr"
; NameLength3 : SHORT -> "int"
; ColumnName : BYTE* optional -> "intptr"
; NameLength4 : SHORT -> "int"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	odbc32 = windows.NewLazySystemDLL("ODBC32.dll")
	procSQLColumns = odbc32.NewProc("SQLColumns")
)

// StatementHandle (void* in/out), CatalogName (BYTE* optional), NameLength1 (SHORT), SchemaName (BYTE* optional), NameLength2 (SHORT), TableName (BYTE* optional), NameLength3 (SHORT), ColumnName (BYTE* optional), NameLength4 (SHORT)
r1, _, err := procSQLColumns.Call(
	uintptr(StatementHandle),
	uintptr(CatalogName),
	uintptr(NameLength1),
	uintptr(SchemaName),
	uintptr(NameLength2),
	uintptr(TableName),
	uintptr(NameLength3),
	uintptr(ColumnName),
	uintptr(NameLength4),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT

function SQLColumns(
  StatementHandle: Pointer;   // void* in/out
  CatalogName: Pointer;   // BYTE* optional
  NameLength1: Smallint;   // SHORT
  SchemaName: Pointer;   // BYTE* optional
  NameLength2: Smallint;   // SHORT
  TableName: Pointer;   // BYTE* optional
  NameLength3: Smallint;   // SHORT
  ColumnName: Pointer;   // BYTE* optional
  NameLength4: Smallint   // SHORT
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLColumns';

result := DllCall("ODBC32\SQLColumns"
    , "Ptr", StatementHandle   ; void* in/out
    , "Ptr", CatalogName   ; BYTE* optional
    , "Short", NameLength1   ; SHORT
    , "Ptr", SchemaName   ; BYTE* optional
    , "Short", NameLength2   ; SHORT
    , "Ptr", TableName   ; BYTE* optional
    , "Short", NameLength3   ; SHORT
    , "Ptr", ColumnName   ; BYTE* optional
    , "Short", NameLength4   ; SHORT
    , "Short")   ; return: SHORT

●SQLColumns(StatementHandle, CatalogName, NameLength1, SchemaName, NameLength2, TableName, NameLength3, ColumnName, NameLength4) = DLL("ODBC32.dll", "int SQLColumns(void*, void*, int, void*, int, void*, int, void*, int)")
# 呼び出し: SQLColumns(StatementHandle, CatalogName, NameLength1, SchemaName, NameLength2, TableName, NameLength3, ColumnName, NameLength4)
# StatementHandle : void* in/out -> "void*"
# CatalogName : BYTE* optional -> "void*"
# NameLength1 : SHORT -> "int"
# SchemaName : BYTE* optional -> "void*"
# NameLength2 : SHORT -> "int"
# TableName : BYTE* optional -> "void*"
# NameLength3 : SHORT -> "int"
# ColumnName : BYTE* optional -> "void*"
# NameLength4 : SHORT -> "int"
# 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 SQLColumns(
    StatementHandle: ?*anyopaque, // void* in/out
    CatalogName: [*c]u8, // BYTE* optional
    NameLength1: i16, // SHORT
    SchemaName: [*c]u8, // BYTE* optional
    NameLength2: i16, // SHORT
    TableName: [*c]u8, // BYTE* optional
    NameLength3: i16, // SHORT
    ColumnName: [*c]u8, // BYTE* optional
    NameLength4: i16 // SHORT
) callconv(std.os.windows.WINAPI) i16;

proc SQLColumns(
    StatementHandle: pointer,  # void* in/out
    CatalogName: ptr uint8,  # BYTE* optional
    NameLength1: int16,  # SHORT
    SchemaName: ptr uint8,  # BYTE* optional
    NameLength2: int16,  # SHORT
    TableName: ptr uint8,  # BYTE* optional
    NameLength3: int16,  # SHORT
    ColumnName: ptr uint8,  # BYTE* optional
    NameLength4: int16  # SHORT
): int16 {.importc: "SQLColumns", stdcall, dynlib: "ODBC32.dll".}

pragma(lib, "odbc32");
extern(Windows)
short SQLColumns(
    void* StatementHandle,   // void* in/out
    ubyte* CatalogName,   // BYTE* optional
    short NameLength1,   // SHORT
    ubyte* SchemaName,   // BYTE* optional
    short NameLength2,   // SHORT
    ubyte* TableName,   // BYTE* optional
    short NameLength3,   // SHORT
    ubyte* ColumnName,   // BYTE* optional
    short NameLength4   // SHORT
);

ccall((:SQLColumns, "ODBC32.dll"), stdcall, Int16,
      (Ptr{Cvoid}, Ptr{UInt8}, Int16, Ptr{UInt8}, Int16, Ptr{UInt8}, Int16, Ptr{UInt8}, Int16),
      StatementHandle, CatalogName, NameLength1, SchemaName, NameLength2, TableName, NameLength3, ColumnName, NameLength4)
# StatementHandle : void* in/out -> Ptr{Cvoid}
# CatalogName : BYTE* optional -> Ptr{UInt8}
# NameLength1 : SHORT -> Int16
# SchemaName : BYTE* optional -> Ptr{UInt8}
# NameLength2 : SHORT -> Int16
# TableName : BYTE* optional -> Ptr{UInt8}
# NameLength3 : SHORT -> Int16
# ColumnName : BYTE* optional -> Ptr{UInt8}
# NameLength4 : SHORT -> Int16
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int16_t SQLColumns(
    void* StatementHandle,
    uint8_t* CatalogName,
    int16_t NameLength1,
    uint8_t* SchemaName,
    int16_t NameLength2,
    uint8_t* TableName,
    int16_t NameLength3,
    uint8_t* ColumnName,
    int16_t NameLength4);
]]
local odbc32 = ffi.load("odbc32")
-- odbc32.SQLColumns(StatementHandle, CatalogName, NameLength1, SchemaName, NameLength2, TableName, NameLength3, ColumnName, NameLength4)
-- StatementHandle : void* in/out
-- CatalogName : BYTE* optional
-- NameLength1 : SHORT
-- SchemaName : BYTE* optional
-- NameLength2 : SHORT
-- TableName : BYTE* optional
-- NameLength3 : SHORT
-- ColumnName : BYTE* optional
-- NameLength4 : SHORT
-- 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 SQLColumns = lib.func('__stdcall', 'SQLColumns', 'int16_t', ['void *', 'uint8_t *', 'int16_t', 'uint8_t *', 'int16_t', 'uint8_t *', 'int16_t', 'uint8_t *', 'int16_t']);
// SQLColumns(StatementHandle, CatalogName, NameLength1, SchemaName, NameLength2, TableName, NameLength3, ColumnName, NameLength4)
// StatementHandle : void* in/out -> 'void *'
// CatalogName : BYTE* optional -> 'uint8_t *'
// NameLength1 : SHORT -> 'int16_t'
// SchemaName : BYTE* optional -> 'uint8_t *'
// NameLength2 : SHORT -> 'int16_t'
// TableName : BYTE* optional -> 'uint8_t *'
// NameLength3 : SHORT -> 'int16_t'
// ColumnName : BYTE* optional -> 'uint8_t *'
// NameLength4 : SHORT -> '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", {
  SQLColumns: { parameters: ["pointer", "pointer", "i16", "pointer", "i16", "pointer", "i16", "pointer", "i16"], result: "i16" },
});
// lib.symbols.SQLColumns(StatementHandle, CatalogName, NameLength1, SchemaName, NameLength2, TableName, NameLength3, ColumnName, NameLength4)
// StatementHandle : void* in/out -> "pointer"
// CatalogName : BYTE* optional -> "pointer"
// NameLength1 : SHORT -> "i16"
// SchemaName : BYTE* optional -> "pointer"
// NameLength2 : SHORT -> "i16"
// TableName : BYTE* optional -> "pointer"
// NameLength3 : SHORT -> "i16"
// ColumnName : BYTE* optional -> "pointer"
// NameLength4 : SHORT -> "i16"
// 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 SQLColumns(
    void* StatementHandle,
    uint8_t* CatalogName,
    int16_t NameLength1,
    uint8_t* SchemaName,
    int16_t NameLength2,
    uint8_t* TableName,
    int16_t NameLength3,
    uint8_t* ColumnName,
    int16_t NameLength4);
C, "ODBC32.dll");
// $ffi->SQLColumns(StatementHandle, CatalogName, NameLength1, SchemaName, NameLength2, TableName, NameLength3, ColumnName, NameLength4);
// StatementHandle : void* in/out
// CatalogName : BYTE* optional
// NameLength1 : SHORT
// SchemaName : BYTE* optional
// NameLength2 : SHORT
// TableName : BYTE* optional
// NameLength3 : SHORT
// ColumnName : BYTE* optional
// NameLength4 : SHORT
// 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 SQLColumns(
        Pointer StatementHandle,   // void* in/out
        byte[] CatalogName,   // BYTE* optional
        short NameLength1,   // SHORT
        byte[] SchemaName,   // BYTE* optional
        short NameLength2,   // SHORT
        byte[] TableName,   // BYTE* optional
        short NameLength3,   // SHORT
        byte[] ColumnName,   // BYTE* optional
        short NameLength4   // SHORT
    );
}

@[Link("odbc32")]
lib LibODBC32
  fun SQLColumns = SQLColumns(
    StatementHandle : Void*,   # void* in/out
    CatalogName : UInt8*,   # BYTE* optional
    NameLength1 : Int16,   # SHORT
    SchemaName : UInt8*,   # BYTE* optional
    NameLength2 : Int16,   # SHORT
    TableName : UInt8*,   # BYTE* optional
    NameLength3 : Int16,   # SHORT
    ColumnName : UInt8*,   # BYTE* optional
    NameLength4 : Int16   # SHORT
  ) : 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 SQLColumnsNative = Int16 Function(Pointer<Void>, Pointer<Uint8>, Int16, Pointer<Uint8>, Int16, Pointer<Uint8>, Int16, Pointer<Uint8>, Int16);
typedef SQLColumnsDart = int Function(Pointer<Void>, Pointer<Uint8>, int, Pointer<Uint8>, int, Pointer<Uint8>, int, Pointer<Uint8>, int);
final SQLColumns = DynamicLibrary.open('ODBC32.dll')
    .lookupFunction<SQLColumnsNative, SQLColumnsDart>('SQLColumns');
// StatementHandle : void* in/out -> Pointer<Void>
// CatalogName : BYTE* optional -> Pointer<Uint8>
// NameLength1 : SHORT -> Int16
// SchemaName : BYTE* optional -> Pointer<Uint8>
// NameLength2 : SHORT -> Int16
// TableName : BYTE* optional -> Pointer<Uint8>
// NameLength3 : SHORT -> Int16
// ColumnName : BYTE* optional -> Pointer<Uint8>
// NameLength4 : SHORT -> Int16
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SQLColumns(
  StatementHandle: Pointer;   // void* in/out
  CatalogName: Pointer;   // BYTE* optional
  NameLength1: Smallint;   // SHORT
  SchemaName: Pointer;   // BYTE* optional
  NameLength2: Smallint;   // SHORT
  TableName: Pointer;   // BYTE* optional
  NameLength3: Smallint;   // SHORT
  ColumnName: Pointer;   // BYTE* optional
  NameLength4: Smallint   // SHORT
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLColumns';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "SQLColumns"
  c_SQLColumns :: Ptr () -> Ptr Word8 -> Int16 -> Ptr Word8 -> Int16 -> Ptr Word8 -> Int16 -> Ptr Word8 -> Int16 -> IO Int16
-- StatementHandle : void* in/out -> Ptr ()
-- CatalogName : BYTE* optional -> Ptr Word8
-- NameLength1 : SHORT -> Int16
-- SchemaName : BYTE* optional -> Ptr Word8
-- NameLength2 : SHORT -> Int16
-- TableName : BYTE* optional -> Ptr Word8
-- NameLength3 : SHORT -> Int16
-- ColumnName : BYTE* optional -> Ptr Word8
-- NameLength4 : SHORT -> 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 sqlcolumns =
  foreign "SQLColumns"
    ((ptr void) @-> (ptr uint8_t) @-> int16_t @-> (ptr uint8_t) @-> int16_t @-> (ptr uint8_t) @-> int16_t @-> (ptr uint8_t) @-> int16_t @-> returning int16_t)
(* StatementHandle : void* in/out -> (ptr void) *)
(* CatalogName : BYTE* optional -> (ptr uint8_t) *)
(* NameLength1 : SHORT -> int16_t *)
(* SchemaName : BYTE* optional -> (ptr uint8_t) *)
(* NameLength2 : SHORT -> int16_t *)
(* TableName : BYTE* optional -> (ptr uint8_t) *)
(* NameLength3 : SHORT -> int16_t *)
(* ColumnName : BYTE* optional -> (ptr uint8_t) *)
(* NameLength4 : SHORT -> 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 ("SQLColumns" sqlcolumns :convention :stdcall) :int16
  (statement-handle :pointer)   ; void* in/out
  (catalog-name :pointer)   ; BYTE* optional
  (name-length1 :int16)   ; SHORT
  (schema-name :pointer)   ; BYTE* optional
  (name-length2 :int16)   ; SHORT
  (table-name :pointer)   ; BYTE* optional
  (name-length3 :int16)   ; SHORT
  (column-name :pointer)   ; BYTE* optional
  (name-length4 :int16))   ; SHORT
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $SQLColumns = Win32::API::More->new('ODBC32',
    'short SQLColumns(LPVOID StatementHandle, LPVOID CatalogName, short NameLength1, LPVOID SchemaName, short NameLength2, LPVOID TableName, short NameLength3, LPVOID ColumnName, short NameLength4)');
# my $ret = $SQLColumns->Call($StatementHandle, $CatalogName, $NameLength1, $SchemaName, $NameLength2, $TableName, $NameLength3, $ColumnName, $NameLength4);
# StatementHandle : void* in/out -> LPVOID
# CatalogName : BYTE* optional -> LPVOID
# NameLength1 : SHORT -> short
# SchemaName : BYTE* optional -> LPVOID
# NameLength2 : SHORT -> short
# TableName : BYTE* optional -> LPVOID
# NameLength3 : SHORT -> short
# ColumnName : BYTE* optional -> LPVOID
# NameLength4 : SHORT -> short
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

SQLColumns

シグネチャ

パラメーター

各言語での呼び出し定義

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