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2026-06-10

读取错误信息 - GetDatabaseError ​

函数简介 ​

读取数据库操作中的错误信息，返回错误信息的字符串指针。

接口名称 ​

GetDatabaseError

DLL调用 ​

c
long GetDatabaseError(long ola, long db);

参数说明 ​

参数名类型说明
ola长整数型OLAPlug对象的指针，由 CreateCOLAPlugInterFace 接口生成。
db长整数型数据库连接句柄，由 OpenDatabase 接口生成。

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long db = ola.OpenDatabase("data/app.db", "");
if (db != 0) {
    int ret = ola.ExecuteSql(db, "INVALID SQL");
    if (ret != 1) {
        std::string err = ola.GetDatabaseError(db);
    }
    ola.CloseDatabase(db);
}
csharp
using OLAPlug;

var ola = new OLAPlugServer();
long db = ola.OpenDatabase("data/app.db", "");
if (db != 0)
{
    int ret = ola.ExecuteSql(db, "INVALID SQL");
    if (ret != 1)
    {
        string err = ola.GetDatabaseError(db);
    }
    ola.CloseDatabase(db);
}
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
db = ola.OpenDatabase("data/app.db", "")
if db != 0:
    ret = ola.ExecuteSql(db, "INVALID SQL")
    if ret != 1:
        err = ola.GetDatabaseError(db)
    ola.CloseDatabase(db)
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
long db = ola.OpenDatabase("data/app.db", "");
if (db != 0) {
    ola.GetDatabaseError(db);
    ola.CloseDatabase(db);
}
cpp
var ola = com("OlaPlug.OlaSoft")
var db = ola.OpenDatabase("data/app.db", "")
if(db) {
    ola.GetDatabaseError(db);
    ola.CloseDatabase(db)
}
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
db = ola.OpenDatabase("data/app.db", "")
If db <> 0 Then
    ola.GetDatabaseError(db);
    ola.CloseDatabase(db)
End If
text
.局部变量 ola, OLAPlug
ola.创建 ()
db ＝ ola.OpenDatabase (“data/app.db“, ““)
.如果真 (db ≠ 0)
    ola.GetDatabaseError(db);
    ola.CloseDatabase (db)
.如果真结束
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var db = ola.OpenDatabase("data/app.db", "");
if(db){
    ola.GetDatabaseError(db);
    ola.CloseDatabase(db);
}
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
长整数 db = ola.OpenDatabase("data/app.db", "")
如果真 (db ≠ 0)
{
    ola.GetDatabaseError(db);
    ola.CloseDatabase(db)
}
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long db = ola.OpenDatabase("data/app.db", "");
if (db != 0) {
    ola.GetDatabaseError(db);
    ola.CloseDatabase(db);
}

原生 DLL 调用 ​

cpp
long instance = CreateCOLAPlugInterFace();
long db = OpenDatabase(instance, "data/app.db", "");
if (db != 0) {
    int ret = ola.ExecuteSql(db, "INVALID SQL");
    if (ret != 1) {
        std::string err = ola.GetDatabaseError(db);
    }
    CloseDatabase(instance, db);
}
csharp
using System.Runtime.InteropServices;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long CreateCOLAPlugInterFace();

long instance = CreateCOLAPlugInterFace();
long db = OpenDatabase(instance, "data/app.db", "");
if (db != 0)
{
    int ret = ola.ExecuteSql(db, "INVALID SQL");
    if (ret != 1)
    {
        string err = ola.GetDatabaseError(db);
    }
    CloseDatabase(instance, db);
}
python
from ctypes import CDLL, c_int, c_int64

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
instance = ola.CreateCOLAPlugInterFace()
db = ola.OpenDatabase(instance, b"data/app.db", b"")
if db:
    ret = ola.ExecuteSql(db, "INVALID SQL")
    if ret != 1:
        err = ola.GetDatabaseError(db)
    ola.CloseDatabase(instance, db)

返回值 ​

错误信息的字符串指针。如果没有错误信息或操作失败，返回 0。使用完毕后需调用 FreeStringPtr 释放内存。