#include <iostream>
using namespace std;
#include <stdio.h>
const int BASE_EXCEPTION=1; // "Base exception" class Id.
const int DB_BASE_EXCEPTION=2; // "DB Base exception" class Id.
// Let's assume that the following class is the base of
// the system exception class hierarchy
class my_base_exception{
public:
my_base_exception()
{
large_string_copy[0]=0;
}
virtual ~my_base_exception(){}
virtual int getType(void) const
{
return BASE_EXCEPTION;
}
virtual int getErrorCode(void) const
{
return 0;
}
virtual char* getErrorMessage(void) const
{
return "";
}
virtual const char* getErrorSQLStm(void) const
{
return reinterpret_cast<const char*>("");
}
virtual const char* getErrorVarInfo(void) const
{
return reinterpret_cast<const char*>("");
}
virtual const char* getErrorLargeString(void) const
{
return large_string_copy;
}
protected:
char large_string_copy[100];
};
#define OTL_DB2_CLI // Compile OTL 4.0/DB2-CLI
// This #define connects the otl_exception class to the exception
// class hierarchy.
#defe OTL_EXCEPTION_DERIVED_FROM my_base_exception
// This #define defines a set of new members in the otl_exception
// class
#define OTL_EXCEPTION_HAS_MEMBERS \
virtual int getType(void) const \
{ \
return DB_BASE_EXCEPTION; \
} \
\
virtual int getErrorCode(void) const \
{ \
return this->code; \
} \
\
virtual char* getErrorMessage(void) const \
{ \
return (char*)this->msg; \
} \
\
virtual const char* getErrorSQLStm(void) const \
{ \
return this->stm_text; \
} \
\
virtual const char* getErrorVarInfo(void) const \
{ \
return this->var_info; \
}
#define OTL_EXCEPTION_COPIES_INPUT_STRING_IN_CASE_OF_OVERFLOW(str,len) \
{ \
copy_str(this->large_string_copy,str,len,sizeof(this->large_string_copy)); \
}
void copy_str(char* dest,const void* src, int len, int buf_size)
{
int temp_len=len;
if(temp_len>buf_size-1)
temp_len=buf_size-1;
#if defined(_MSC_VER)
#if (_MSC_VER >= 1400) // VC++ 8.0 or higher
strncpy_s(dest,buf_size,reinterpret_cast<const char*>(src),temp_len);
dest[temp_len]=0;
#else
strncpy(dest,reinterpret_cast<const char*>(src),temp_len);
dest[temp_len]=0;
#endif
#else
strncpy(dest,reinterpret_cast<const char*>(src),temp_len);
dest[temp_len]=0;
#endif
}
#include <otlv4.h> // include the OTL 4.0 header file
otl_connect db; // connect object
void insert()
// insert rows into table
{
otl_stream o(50, // buffer size
"insert into test_tab values(:f1<int>,:f2<char[31]>)",
// SQL statement
db // connect object
);
char tmp[100];
for(int i=1;i<=100;++i){
#if defined(_MSC_VER)
#if (_MSC_VER >= 1400) // VC++ 8.0 or higher
sprintf_s(tmp,sizeof(tmp),"12345678901234567890123456789012345_%d",i);
#else
sprintf(tmp,"12345678901234567890123456789012345_%d",i);
#endif
#else
sprintf(tmp,"12345678901234567890123456789012345_%d",i);
#endif
o<<i<<tmp;
}
}
int main()
{
otl_connect::otl_initialize(); // initialize the database environment
try{
db.rlogon("scott/tiger@db2sql"); // connect to the database
otl_cursor::direct_exec
(
db,
"drop table test_tab",
otl_exception::disabled // disable OTL exceptions
); // drop table
otl_cursor::direct_exec
(
db,
"create table test_tab(f1 int, f2 varchar(30))"
); // create table
insert(); // insert records into table
}
catch(my_base_exception& ex){ // intercept the base exception
if(ex.getType()==DB_BASE_EXCEPTION){
// "database exception" is recognized
// here, the otl_exception can be analyzed, or simply printed out
cerr<<"Database exception:"<<endl;
cerr<<"Code: "<<ex.getErrorCode()<<endl; // print out error code
cerr<<"Message: "
<<reinterpret_cast<const char*>(ex.getErrorMessage())
<<endl; // print out the error message
cerr<<"SQL Stm: "
<<ex.getErrorSQLStm()
<<endl; // print out the SQL Statement
cerr<<"Var Info: "
<<ex.getErrorVarInfo()
<<endl; // print out the bind variable information
if(ex.getErrorCode()==32005){
// OTL defined exception
cerr<<"Large Input String: "
<<ex.getErrorLargeString()
<<endl;
}
}
db.logoff(); // disconnect from the database
return 0;
}
Database exception:
Code: 32005
Message: Input string value is too large to fit into the buffer
SQL Stm: insert into test_tab values(:f1 ,:f2 )
Var Info: Variable: :f2<CHAR>, datatype in operator <</>>: CHAR
Large Input String: 1234567890123456789012345678901
Copyrigh4 © 1996-2023, Sergei Kuchin, email: skuchin@gmail.com, skuchin@gmail.com.
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