[英]Connecting c++ program with Oracle
我正在嘗試將C ++程序連接到Oracle數據庫(12.2)。
我的C ++程序是(我在ubuntu中使用g ++編譯器),
#include <occi.h>
#include <iostream>
using namespace std;
int main()
{ oracle::occi::Environment *env = oracle::occi::Environment::createEnvironment();
oracle::occi::Connection *conn = env->createConnection("bsk", "oraclepass");
env->terminateConnection(conn);
oracle::occi::Environment::terminateEnvironment(env);
}
我遇到了錯誤
undefined reference to `oracle::occi::Environment::createEnvironment(oracle::occi::Environment::Mode, void*, void* (*)(void*, unsigned long), void* (*)(void*, void*, unsigned long), void (*)(void*, void*))'
Employees.cpp:(.text+0x169): undefined reference to `oracle::occi::Environment::terminateEnvironment(oracle::occi::Environment*)'
collect2: error: ld returned 1 exit status
我是數據庫連接的新手。 你能幫我嗎?
在Oracle網站上,這是一個有效的示例:
const string userName = "HR";
const string password = "password";
const string connectString = "";
Environment *env = Environment::createEnvironment();
{
Connection *conn = env->createConnection(userName, password, connectString);
Statement *stmt = conn->createStatement("SELECT blobcol FROM mytable");
ResultSet *rs = stmt->executeQuery();
rs->next();
Blob b = rs->getBlob(1);
cout << "Length of BLOB : " << b.length();
...
stmt->closeResultSet(rs);
conn->terminateStatement(stmt);
env->terminateConnection(conn);
}
Environment::terminateEnvironment(env);
您的代碼似乎朝着正確的方向發展。 因此,似乎缺少某些庫!
確保這些庫已安裝在您的計算機上。
試試這個代替
$ g++ sample.C -I/opt/oracle/11.0.2/rdbms/public/ -L/opt/oracle/11.0.2/lib/ -locci -lclntsh
更換/opt/oracle/11.0.2
與Oracle home路徑,它應該工作。
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