SQLRowCount

関数

更新や削除などで影響を受けた行数を取得する。

DLLODBC32.dll呼出規約winapi

シグネチャ

// ODBC32.dll
#include <windows.h>

SHORT SQLRowCount(
    void* StatementHandle,
    INT* RowCount
);

パラメーター

名前	型	方向
StatementHandle	void*	in
RowCount	INT*	out

戻り値の型: SHORT

各言語での呼び出し定義

// ODBC32.dll
#include <windows.h>

SHORT SQLRowCount(
    void* StatementHandle,
    INT* RowCount
);

[DllImport("ODBC32.dll", ExactSpelling = true)]
static extern short SQLRowCount(
    IntPtr StatementHandle,   // void*
    out int RowCount   // INT* out
);

<DllImport("ODBC32.dll", ExactSpelling:=True)>
Public Shared Function SQLRowCount(
    StatementHandle As IntPtr,   ' void*
    <Out> ByRef RowCount As Integer   ' INT* out
) As Short
End Function

' StatementHandle : void*
' RowCount : INT* out
Declare PtrSafe Function SQLRowCount Lib "odbc32" ( _
    ByVal StatementHandle As LongPtr, _
    ByRef RowCount As Long) As Integer
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

SQLRowCount = ctypes.windll.odbc32.SQLRowCount
SQLRowCount.restype = ctypes.c_short
SQLRowCount.argtypes = [
    ctypes.POINTER(None),  # StatementHandle : void*
    ctypes.POINTER(ctypes.c_int),  # RowCount : INT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ODBC32.dll')
SQLRowCount = Fiddle::Function.new(
  lib['SQLRowCount'],
  [
    Fiddle::TYPE_VOIDP,  # StatementHandle : void*
    Fiddle::TYPE_VOIDP,  # RowCount : INT* out
  ],
  Fiddle::TYPE_SHORT)

#[link(name = "odbc32")]
extern "system" {
    fn SQLRowCount(
        StatementHandle: *mut (),  // void*
        RowCount: *mut i32  // INT* out
    ) -> i16;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ODBC32.dll")]
public static extern short SQLRowCount(IntPtr StatementHandle, out int RowCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ODBC32_SQLRowCount' -Namespace Win32 -PassThru
# $api::SQLRowCount(StatementHandle, RowCount)

#uselib "ODBC32.dll"
#func global SQLRowCount "SQLRowCount" sptr, sptr
; SQLRowCount StatementHandle, varptr(RowCount)   ; 戻り値は stat
; StatementHandle : void* -> "sptr"
; RowCount : INT* 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 SQLRowCount "SQLRowCount" sptr, var
; res = SQLRowCount(StatementHandle, RowCount)
; StatementHandle : void* -> "sptr"
; RowCount : INT* 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。#uselib "ODBC32.dll"
#cfunc global SQLRowCount "SQLRowCount" sptr, sptr
; res = SQLRowCount(StatementHandle, varptr(RowCount))
; StatementHandle : void* -> "sptr"
; RowCount : INT* out -> "sptr"
; ※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 SQLRowCount(void* StatementHandle, INT* RowCount)
#uselib "ODBC32.dll"
#cfunc global SQLRowCount "SQLRowCount" intptr, var
; res = SQLRowCount(StatementHandle, RowCount)
; StatementHandle : void* -> "intptr"
; RowCount : INT* 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。; SHORT SQLRowCount(void* StatementHandle, INT* RowCount)
#uselib "ODBC32.dll"
#cfunc global SQLRowCount "SQLRowCount" intptr, intptr
; res = SQLRowCount(StatementHandle, varptr(RowCount))
; StatementHandle : void* -> "intptr"
; RowCount : INT* out -> "intptr"
; ※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")
	procSQLRowCount = odbc32.NewProc("SQLRowCount")
)

// StatementHandle (void*), RowCount (INT* out)
r1, _, err := procSQLRowCount.Call(
	uintptr(StatementHandle),
	uintptr(RowCount),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // SHORT

function SQLRowCount(
  StatementHandle: Pointer;   // void*
  RowCount: Pointer   // INT* out
): Smallint; stdcall;
  external 'ODBC32.dll' name 'SQLRowCount';

result := DllCall("ODBC32\SQLRowCount"
    , "Ptr", StatementHandle   ; void*
    , "Ptr", RowCount   ; INT* out
    , "Short")   ; return: SHORT

●SQLRowCount(StatementHandle, RowCount) = DLL("ODBC32.dll", "int SQLRowCount(void*, void*)")
# 呼び出し: SQLRowCount(StatementHandle, RowCount)
# StatementHandle : void* -> "void*"
# RowCount : INT* 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)。