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C++ 与 Oracle 数据库的事务处理涉及到使用 C++ 编程语言与 Oracle 数据库进行交互，以实现事务的提交、回滚等操作。以下是一个简单的示例，展示了如何在 C++ 中使用 OCI（Oracle Call Interface）库来处理 Oracle 数据库的事务。
首先，确保已经安装了 Oracle Instant Client，并正确配置了环境变量。然后，创建一个名为 “example.cpp” 的文件，并添加以下代码：
#include <iostream> #include <oci.h> using namespace std; void handleError(const char *msg) { cout << msg << endl; exit(-1); } int main() { OCIEnv *env = nullptr, *errhp = nullptr; OCIServer *srvhp = nullptr; OCISvcCtx *svchp = nullptr; OCIAttrSet(env, (dvoid *)OCI_HTYPE_ENV, (dvoid *)errhp, 0, (dvoid *)OCI_ATTR_ERROR, env); OCIAttrSet(env, (dvoid *)OCI_HTYPE_SERVER, (dvoid *)srvhp, 0, (dvoid *)OCI_ATTR_SERVER, env); OCIAttrSet(env, (dvoid *)OCI_HTYPE_SVCCTX, (dvoid *)svchp, 0, (dvoid *)OCI_ATTR_SVCCTX, env); if (OCIInit(&env, errhp, NULL, NULL, NULL) != OCI_SUCCESS) { handleError("OCIInit failed"); } if (OCIServerAttach(srvhp, errhp, (OraText *)"localhost:1521", strlen("localhost:1521"), 0) != OCI_SUCCESS) { handleError("OCIServerAttach failed"); } if (OCIHandleAlloc((dvoid *)env, (dvoid **)&svchp, OCI_HTYPE_SVCCTX, 0, NULL) != OCI_SUCCESS) { handleError("OCIHandleAlloc failed"); } if (OCIAttrSet(svchp, (dvoid *)OCI_HTYPE_SVCCTX, (dvoid *)srvhp, 0, (dvoid *)OCI_ATTR_SERVER, svchp) != OCI_SUCCESS) { handleError("OCIAttrSet failed"); } if (OCIHandleAlloc((dvoid *)env, (dvoid **)&errhp, OCI_HTYPE_ERROR, 0, NULL) != OCI_SUCCESS) { handleError("OCIHandleAlloc failed"); } if (OCIStartup(svchp, errhp) != OCI_SUCCESS) { handleError("OCIStartup failed"); } // Begin transaction if (OCIHandleBegin((dvoid *)svchp, errhp, OCI_DEFAULT) != OCI_SUCCESS) { handleError("OCIHandleBegin failed"); } // Execute SQL statements if (OCIHandleExecute(svchp, errhp, (dvoid *)sql_stmt, strlen(sql_stmt), 0, NULL, 0, NULL, OCI_DEFAULT) != OCI_SUCCESS) { handleError("OCIHandleExecute failed"); } // Commit transaction if (OCIHandleCommit((dvoid *)svchp, errhp, OCI_DEFAULT) != OCI_SUCCESS) { handleError("OCIHandleCommit failed"); } else { cout << "Transaction committed successfully." << endl; } // Rollback transaction if (OCIHandleRollback((dvoid *)svchp, errhp, OCI_DEFAULT) != OCI_SUCCESS) { handleError("OCIHandleRollback failed"); } else { cout << "Transaction rolled back successfully." << endl; } // Disconnect and cleanup OCIHandleFree(svchp); OCIHandleFree(errhp); OCIHandleFree(srvhp); OCIShutdown(env); return 0; } 将上述代码中的 sql_stmt 变量替换为要执行的 SQL 语句。编译并运行示例代码，它将连接到本地 Oracle 数据库，开始一个事务，执行 SQL 语句，提交或回滚事务，然后断开连接并进行清理。
