GetString in ocidml.cpp fails

Question

Hi.
I've installed Oracle 9i release 9.2.0.1 and have compiled the ocidml.cpp - demo program. But when I run it the call to getString in DisplayAllRows create an Assertion failure (Debug). The program runs as expected if I remove the call to getString.
Does anybody know what I can do about this?
Thanks in advance!
Ingrid

Answer 1

----- BEGIN CODE:
* occidml - To exhibit the insertion, Selection, updating and deletion of
* a row through OCCI.
* Description
* Create a program which has insert, select, update & delete as operations.
* Perform all these operations using OCCI interface.
#include <iostream>
#include <occi.h>
using namespace oracle::occi;
using namespace std;
class occidml
private:
Environment *env;
Connection *conn;
Statement *stmt;
public:
occidml (string user, string passwd, string db)
env = Environment::createEnvironment (Environment::DEFAULT);
conn = env->createConnection (user, passwd, db);
~occidml ()
env->terminateConnection (conn);
Environment::terminateEnvironment (env);
* Insertion of a row with dynamic binding, PreparedStatement functionality.
void insertBind (int c1, string c2)
string sqlStmt = "INSERT INTO author_tab VALUES (:x, :y)";
stmt=conn->createStatement (sqlStmt);
try{
stmt->setInt (1, c1);
stmt->setString (2, c2);
stmt->executeUpdate ();
cout << "insert - Success" << endl;
}catch(SQLException ex)
cout<<"Exception thrown for insertBind"<<endl;
cout<<"Error number: "<< ex.getErrorCode() << endl;
cout<<ex.getMessage() << endl;
conn->terminateStatement (stmt);
* Inserting a row into the table.
void insertRow ()
string sqlStmt = "INSERT INTO author_tab VALUES (111, 'ASHOK')";
stmt = conn->createStatement (sqlStmt);
try{
stmt->executeUpdate ();
cout << "insert - Success" << endl;
}catch(SQLException ex)
cout<<"Exception thrown for insertRow"<<endl;
cout<<"Error number: "<< ex.getErrorCode() << endl;
cout<<ex.getMessage() << endl;
conn->terminateStatement (stmt);
* updating a row
void updateRow (int c1, string c2)
string sqlStmt =
"UPDATE author_tab SET author_name = :x WHERE author_id = :y";
stmt = conn->createStatement (sqlStmt);
try{
stmt->setString (1, c2);
stmt->setInt (2, c1);
stmt->executeUpdate ();
cout << "update - Success" << endl;
}catch(SQLException ex)
cout<<"Exception thrown for updateRow"<<endl;
cout<<"Error number: "<< ex.getErrorCode() << endl;
cout<<ex.getMessage() << endl;
conn->terminateStatement (stmt);
* deletion of a row
void deleteRow (int c1, string c2)
string sqlStmt =
"DELETE FROM author_tab WHERE author_id= :x AND author_name = :y";
stmt = conn->createStatement (sqlStmt);
try{
stmt->setInt (1, c1);
stmt->setString (2, c2);
stmt->executeUpdate ();
cout << "delete - Success" << endl;
}catch(SQLException ex)
cout<<"Exception thrown for deleteRow"<<endl;
cout<<"Error number: "<< ex.getErrorCode() << endl;
cout<<ex.getMessage() << endl;
conn->terminateStatement (stmt);
* displaying all the rows in the table
void displayAllRows ()
// string sqlStmt = "SELECT author_id, author_name FROM author_tab";
string sqlStmt = "SELECT InSchema, Attribute FROM NameStore WHERE InSchema IN (SELECT TopConcept FROM ConceptTree START WITH SubConcept IN ( SELECT IsA FROM TypeOf WHERE LOWER(Instance) = LOWER('Hrúz Mária')) CONNECT BY SubConcept = PRIOR TopConcept) AND IsKey = 1 UNION SELECT InSchema, Attribute FROM NameStore WHERE InSchema IN (SELECT IsA FROM TypeOf WHERE LOWER(Instance) = LOWER('Hrúz Mária')) AND IsKey = 1 UNION SELECT InSchema, n.Attribute FROM NameStore n, Attributes a WHERE TypeOf IN (SELECT TopConcept FROM ConceptTree START WITH SubConcept IN ( SELECT IsA FROM TypeOf WHERE LOWER(Instance) = LOWER('Hrúz Mária')) CONNECT BY SubConcept = PRIOR TopConcept) AND n.Attribute = a.Attribute UNION SELECT InSchema, n.Attribute FROM NameStore n, Attributes a WHERE TypeOf IN (SELECT IsA FROM TypeOf WHERE LOWER(Instance) = LOWER('Hrúz Mária')) AND n.Attribute = a.Attribute";
stmt = conn->createStatement (sqlStmt);
ResultSet *rset = stmt->executeQuery ();
try{
while (rset->next ())
cout << "author_id: " << rset->getString (1) << " author_name: "
<< rset->getString (2) << endl;
}catch(SQLException ex)
cout<<"Exception thrown for displayAllRows"<<endl;
cout<<"Error number: "<< ex.getErrorCode() << endl;
cout<<ex.getMessage() << endl;
stmt->closeResultSet (rset);
conn->terminateStatement (stmt);
}; // end of class occidml
int main (void)
string user = "scott";
string passwd = "tiger";
string db = "";
cout << "occidml - Exhibiting simple insert, delete & update operations"
<< endl;
occidml *demo = new occidml (user, passwd, db);
for( int loop = 0; loop < 20; loop++ )
cout << "Displaying all rows after all the operations" << endl << endl;
demo->displayAllRows ();
delete (demo);
cout << "occidml - done" << endl;
---- END CODE
For first run it will terminate perfectly. Some others generates exceptions. SQL query generates 10 rows. For a perfect run it generates lines like
Displaying all rows after all the operations
author_id: anyafiú author_name: anya
author_id: anyalány author_name: anya
author_id: anyalány author_name: lány
author_id: apalány author_name: lány
author_id: helyszÃn_személy author_name: személy
author_id: házastárs author_name: feleség
author_id: időpont_személy author_name: személy
author_id: nő author_name: női név
author_id: személy author_name: személynév
author_id: személy_terület author_name: személy
Compile settings for Oracle9 client (9.2.0.1 with patchset 9.2.0.5):
@SET ORACLE_HOME=C:\Oracle\Client9
@SET INCLUDE=%INCLUDE%;%ORACLE_HOME%\oci\include;%ORACLE_HOME%\rdbms\demo
@SET LIB=%LIB%;%ORACLE_HOME%\bin;%ORACLE_HOME%\oci\lib\msvc\vc7;%CPP_HOME%\lib;%ORACLE_HOME%\oci\lib\msvc\
@SET LINK=/nod:libc /nodefaultlib:libcd
@SET TNSNAMES=%ORACLE_HOME%\network\admin\tnsnames.ora
@SET OPTIONS=/W3 /GX /EHsc /ML /O2 /D "WIN32COMMON" /D "_MT" /D "_MBCS" /D "_DLL" /D "_AFXDLL" /D "_WINDOWS" /D "NDEBUG" /D "WIN32"
@SET CL=%T2% %OPTIONS% /I%ORACLE_HOME%\oci\include /o%OUTFILE%
@SET PATH=%PATH%;%ORACLE_HOME%\bin
@SET FILELIST=oci.lib msvcrt.lib msvcprt.lib oraocci9.lib
@SET FILELIST=%FILELIST% occidml.cpp
@cl.exe %FILELIST%
---- END COMPILE SETTINGS
For a 10g client (10.1.0.2 with patchset 10.1.0.4) differences are:
@SET ORACLE_HOME=C:\Oracle\Client10
@SET FILELIST=oci.lib msvcrt.lib msvcprt.lib oraocci10.lib
Computer: Intel P4 Prescott 3GHz, 1GB RAM
Remote database: Oracle 10g on Linux (10.1.0.2)