Ubuntu ORA-24960: the attribute OCI_ATTR_USERNAME is greater than the maximum allowable length of 255

问题

I'm trying to run the following test program on Ubuntu to connect to an oracle database using the instant client OCCI library.

#include <iostream>
#include <occi.h>

using namespace oracle::occi;
int main() {

    Environment *env = Environment::createEnvironment(Environment::DEFAULT);
    Connection *conn = env->createConnection( "user", "1234" ); 
    env->terminateConnection(conn);
    Environment::terminateEnvironment(env);

}

There are no errors when compiling

g++ main.cpp -L ~/instantclient_12_2 -locci -lclntsh -I ~/instantclient_12_2/sdk/include

But when running I get

terminate called after throwing an instance of 'oracle::occi::SQLException'
  what():  ORA-24960: the attribute  OCI_ATTR_USERNAME is greater than the maximum allowable length of 255
Aborted

I'm running Ubuntu 16.04, gcc 5.4.0 and I get the same result with instant client 11.2 and 12.2.

This has been asked before: https://stackoverflow.com/questions/40022118/ora-24960-the-attribute-oci-attr-username-is-greater-than-the-maximum but the answer is not applicable to linux (or I'm missing the point).

Any help would be appreciated.

回答1:

Solved the problem by reverting to an older compiler.

$ sudo apt-get install g++-4.8
$ g++-4.8 main.cpp -L ~/instantclient_12_2 -locci -lclntsh -I ~/instantclient_12_2/sdk/include

Perhaps the latest compiler and libraries is incompatible with those used to build the OCCI libraries.

回答2:

If you are using CMake

1) Add this line on your CMakeLists.txt to specify the compiler to use

SET(CMAKE_CXX_COMPILER /usr/bin/g++-4.8)

P.S You may have to install g++-4.8

(apt-get install g++-4.8)

来源：https://stackoverflow.com/questions/42890553/ubuntu-ora-24960-the-attribute-oci-attr-username-is-greater-than-the-maximum-al

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