c oracle 存储过程

C 和 Oracle 存储过程是数据库领域常用的工具，C 作为高级的编程语言，可以使用 Oracle 存储过程实现比较复杂的逻辑操作，例如数据处理和管理。

Oracle 存储过程是一段预先编译好的 SQL 代码块，用于对数据库执行相关的操作。它可以接收参数和返回值，可以包含流程控制，循环，判断等语句，提供灵活的数据处理过程。C 语言也可以使用 Oracle 存储过程来进行数据库访问和控制。

一个简单的 C 程序，使用 Oracle 存储过程来查询数据库中的某个表的所有行，代码如下：

#include #include #include int main() { OCIEnv *envhp; OCIServer *srvhp; OCIError *errhp; OCISession *usrhp; OCIStmt *stmhp; text *sql="SELECT * FROM test_table"; sword status; ociInitialize(OCI_DEFAULT); ociEnvCreate(&envhp,OCI_THREADED|OCI_OBJECT,(dvoid*)0,0,0,0); ociHandleAlloc((dvoid *)envhp,(dvoid **)&srvhp,OCI_HTYPE_SERVER,0,(dvoid **)0); ociHandleAlloc((dvoid *) envhp,(dvoid **)&errhp,OCI_HTYPE_ERROR,0,(dvoid **)0); ociServerAttach(srvhp,errhp,(text *)""); ociHandleAlloc((dvoid *)envhp,(dvoid **)&usrhp,(ub4)OCI_HTYPE_SESSION,(size_t)0,(dvoid **)0); ociAttrSet((dvoid *)usrhp,(ub4)OCI_HTYPE_SESSION,(dvoid *)"USER_ID",(ub4)7,OCI_ATTR_USERNAME,errhp); ociAttrSet((dvoid *)usrhp,(ub4)OCI_HTYPE_SESSION,(dvoid *)"PASSWD",(ub4)6,OCI_ATTR_PASSWORD,errhp); ociSessionBegin(srvhp,errhp,usrhp,OCI_CRED_RDBMS,(ub4)OCI_DEFAULT); ociHandleAlloc((dvoid *)envhp,(dvoid **)&stmhp,(ub4)OCI_HTYPE_STMT,(size_t)0,(dvoid **)0); ociStmtPrepare(stmhp,errhp,sql,strlen((char*)sql),(ub4)OCI_NTV_SYNTAX,(ub4)OCI_DEFAULT); ociStmtExecute(usrhp,stmhp,errhp,(ub4)1,(ub4)0,(CONST OCISnapshot **)0,(OCISnapshot **)0,(ub4)OCI_DEFAULT); ociHandleFree((dvoid *)stmhp,(ub4)OCI_HTYPE_STMT); ociSessionEnd(srvhp,errhp,usrhp,OCI_DEFAULT); ociServerDetach(srvhp,errhp,OCI_DEFAULT); ociHandleFree((dvoid *)srvhp,(ub4)OCI_HTYPE_SERVER); ociHandleFree((dvoid *)errhp,(ub4)OCI_HTYPE_ERROR); ociHandleFree((dvoid *)usrhp,(ub4)OCI_HTYPE_SESSION); ociHandleFree((dvoid *)envhp,(ub4)OCI_HTYPE_ENV); ociCleanup(); return 0; }