Uso de la clasificación de datos

Se aplica a: SQL Server Azure SQL Database Azure Synapse Analytics

Descargar controlador OLE DB

Información general

La clasificación y detección de datos de SQL es un conjunto de servicios avanzados para detectar, clasificar, etiquetar y notificar información confidencial en las bases de datos. Microsoft OLE DB Driver for SQL Server (versión 18.5.0) agrega compatibilidad para recuperar los metadatos de clasificación cuando el origen de datos subyacente admite la característica. Se tiene acceso a esta información a través de la interfaz ISSDataClassification.

Para obtener más información sobre cómo asignar una clasificación a las columnas, consulte Clasificación y detección de datos de SQL.

Ejemplos de código

Las siguientes consultas de Transact-SQL se pueden ejecutar en SSMS para configurar los requisitos previos de la aplicación de C++ de ejemplo:

CREATE DATABASE [mydb]
GO

USE [mydb]
GO

CREATE TABLE [dbo].[mytable](
    [col1] [int] NULL,
    [col2] [int] NULL
)
GO

ADD SENSITIVITY CLASSIFICATION TO [dbo].[mytable].[col1] WITH (label = 'Label1', label_id = 'LabelId1', information_type = 'Type1', information_type_id = 'TypeId1', rank = Medium)
GO

ADD SENSITIVITY CLASSIFICATION TO [dbo].[mytable].[col2] WITH (label = 'Label2', label_id = 'LabelId2', information_type = 'Type2', information_type_id = 'TypeId2', rank = High)

En el código de C++ siguiente se usa Microsoft OLE DB Driver para obtener la información de clasificación que se genera mediante las consultas de Transact-SQL anteriores:

#include <atlbase.h>
#include <msdasc.h>
#include <exception>
#include <iostream>
#include <string>
#include "msoledbsql.h"

void Connect(CComPtr<IDBInitialize>& pIDBInitialize, const wchar_t* server, const wchar_t* database);
SENSITIVITYCLASSIFICATION* GetSensitivityClassificationInfo(CComPtr<IDBInitialize>& pIDBInitialize, const wchar_t* query);
void PrintSensitivityClassificationInfo(SENSITIVITYCLASSIFICATION* pSensitivityClassification);

int main()
{
    const wchar_t server[] = L"myserver";
    const wchar_t database[] = L"mydb";
    const wchar_t query[] = L"SELECT col1, col2, col1 + col2 FROM mytable";

    CoInitialize(nullptr);

    try
    {
        // Connect to data source
        CComPtr<IDBInitialize> pIDBInitialize;
        Connect(pIDBInitialize, server, database);

        // Obtain sensitivity classification info
        SENSITIVITYCLASSIFICATION* pSensitivityClassification = GetSensitivityClassificationInfo(pIDBInitialize, query);

        // Print sensitivity classification info
        PrintSensitivityClassificationInfo(pSensitivityClassification);

        if (pSensitivityClassification)
        {
            CComPtr<IMalloc> pIMalloc;
            if (FAILED(CoGetMalloc(1, &pIMalloc)))
            {
                throw std::exception("CoGetMalloc call failed.");
            }

            // Release memory
            pIMalloc->Free(pSensitivityClassification);
        }
    }
    catch (std::exception& e)
    {
        std::cerr << "Exception caught: " << e.what() << std::endl;
        return 1;
    }

    CoUninitialize();
    return 0;
}

void Connect(CComPtr<IDBInitialize>& pIDBInitialize, const wchar_t* server, const wchar_t* database)
{
    // Construct the connection string.
    std::wstring connString = L"Provider=MSOLEDBSQL19;Data Source=" + std::wstring(server) + L";Database=" +
        std::wstring(database) + L";Authentication=ActiveDirectoryIntegrated;Use Encryption for Data=Mandatory;";

    CComPtr<IDataInitialize> pIDataInitialize;
    if (FAILED(CoCreateInstance(CLSID_MSDAINITIALIZE, nullptr, CLSCTX_INPROC_SERVER, IID_IDataInitialize, reinterpret_cast<LPVOID*>(&pIDataInitialize))))
    {
        throw std::exception("CoCreateInstance call failed.");
    }

    if (FAILED(pIDataInitialize->GetDataSource(nullptr, CLSCTX_INPROC_SERVER, connString.c_str(), IID_IDBInitialize, reinterpret_cast<IUnknown**>(&pIDBInitialize))))
    {
        throw std::exception("GetDataSource call failed.");
    }

    if (FAILED(pIDBInitialize->Initialize()))
    {
        throw std::exception("Initialize call failed.");
    }
}

SENSITIVITYCLASSIFICATION* GetSensitivityClassificationInfo(CComPtr<IDBInitialize>& pIDBInitialize, const wchar_t* query)
{
    CComPtr<IDBCreateSession> pIDBCreateSession;
    if (FAILED(pIDBInitialize.QueryInterface<IDBCreateSession>(&pIDBCreateSession)))
    {
        throw std::exception("QueryInterface call failed.");
    }

    CComPtr<IDBCreateCommand> pIDBCreateCommand;
    if (FAILED(pIDBCreateSession->CreateSession(nullptr, IID_IDBCreateCommand, reinterpret_cast<IUnknown**>(&pIDBCreateCommand))))
    {
        throw std::exception("CreateSession call failed.");
    }

    CComPtr<ICommandText> pICommandText;
    if (FAILED(pIDBCreateCommand->CreateCommand(nullptr, IID_ICommandText, reinterpret_cast<IUnknown**>(&pICommandText))))
    {
        throw std::exception("CreateCommand call failed.");
    }

    if (FAILED(pICommandText->SetCommandText(DBGUID_DBSQL, query)))
    {
        throw std::exception("SetCommandText call failed.");
    }

    CComPtr<ISSDataClassification> pISSDataClassification;
    if (FAILED(pICommandText->Execute(nullptr, IID_ISSDataClassification, nullptr, nullptr, reinterpret_cast<IUnknown**>(&pISSDataClassification))))
    {
        throw std::exception("Execute call failed.");
    }

    SENSITIVITYCLASSIFICATION* pSensitivityClassification = nullptr;
    if (FAILED(pISSDataClassification->GetSensitivityClassification(&pSensitivityClassification)))
    {
        throw std::exception("GetSensitivityClassification call failed.");
    }

    return pSensitivityClassification;
}

void PrintSensitivityClassificationInfo(SENSITIVITYCLASSIFICATION* pSensitivityClassification)
{
    if (!pSensitivityClassification)
    {
        return;
    }

    if (pSensitivityClassification->eQuerySensitivityRank != SENSITIVITYRANK_NOT_DEFINED)
    {
        std::wcout << L"Query sensitivity rank: " << pSensitivityClassification->eQuerySensitivityRank << L"\n\n";
    }

    for (USHORT colIdx = 0; colIdx < pSensitivityClassification->cColumnSensitivityMetadata; ++colIdx)
    {
        const COLUMNSENSITIVITYMETADATA& columnMetadata = pSensitivityClassification->rgColumnSensitivityMetadata[colIdx];

        std::wcout << L"Sensitivity classification for column #" << colIdx << L":" << std::endl;
        for (USHORT propIdx = 0; propIdx < columnMetadata.cSensitivityProperties; ++propIdx)
        {
            const SENSITIVITYPROPERTY& prop = columnMetadata.rgSensitivityProperties[propIdx];

            std::wcout << L"Property #" << propIdx << L":" << std::endl;

            if (prop.eSensitivityRank != SENSITIVITYRANK_NOT_DEFINED)
            {
                std::wcout << L"\tSensitivity rank: \t" << prop.eSensitivityRank << std::endl;
            }

            if (prop.pSensitivityLabel)
            {
                if (prop.pSensitivityLabel->pwszId)
                {
                    std::wcout << L"\tSensitivity label id: \t" << prop.pSensitivityLabel->pwszId << std::endl;
                }
                if (prop.pSensitivityLabel->pwszName)
                {
                    std::wcout << L"\tSensitivity label name: " << prop.pSensitivityLabel->pwszName << std::endl;
                }
            }

            if (prop.pInformationType)
            {
                if (prop.pInformationType->pwszId)
                {
                    std::wcout << L"\tInformation type id: \t" << prop.pInformationType->pwszId << std::endl;
                }
                if (prop.pInformationType->pwszName)
                {
                    std::wcout << L"\tInformation type name: \t" << prop.pInformationType->pwszName << std::endl;
                }
            }

            std::wcout << std::endl;
        }
    }
}

Vea también

Interfaces (OLE DB)
ISSDataClassification