#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_ODBC_MSSQL_2008 // Compile OTL 4/ODBC, MS SQL 2008
//#define OTL_ODBC // Compile OTL 4/ODBC. Uncomment this when used with MS SQL 7.0/ 2000
// 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@mssql2008"); // connect to MS SQL Server
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
Copyright © 1996-2023, Sergei Kuchin, email: skuchin@gmail.com, skuchin@gmail.com.
Permission to use, copy, modify and redistribute this document for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.