OTL 4.0, Example 257 (64-bit signed inetegers, Oracle 7)

This example demonstrates a simple INSERT, SELECT, constant SQL statements and bigint's with the OCI7.

Source Code

#include <iostream>
using namespace std;
#include <stdio.h>
#define OTL_ORA7 // Compile OTL 4.0/OCI7
#if defined(_MSC_VER) // VC++

// Enabling support for 64-bit signed integers
// Since 64-bit integers are not part of the ANSI C++
// standard, this definition is compiler specific.
#define OTL_BIGINT __int64

// Defining a bigint constant that is larger than
// the max 32-bit integer value.
const OTL_BIGINT BIGINT_VAL1=12345678901234000;

// Defining a string-to-bigint conversion
// that is used by OTL internally.
// Since 64-bit ineteger conversion functions are
// not part of the ANSI C++ standard, the code
// below is compiler specific
#define OTL_STR_TO_BIGINT(str,n) \
{ \
n=_atoi64(str); \
}

// Defining a bigint-to-string conversion
// that is used by OTL internally.
// Since 64-bit ineteger conversion functions are
// not part of the ANSI C++ standard, the code
// below is compiler specific
#define OTL_BIGINT_TO_STR(n,str) \
{ \
_i64toa(n,str,10); \
}

#elif defined(__GNUC__) // GNU C++

#include <stdlib.h>

// Enabling support for 64-bit signed integers
// Since 64-bit integers are not part of the ANSI C++
// standard, this definition is compiler specific.
#define OTL_BIGINT long long

const OTL_BIGINT BIGINT_VAL1=12345678901234000LL;

// Defining a string-to-bigint conversion
// that is used by OTL internally.
// Since 64-bit ineteger conversion functions are
// not part of the ANSI C++ standard, the code
// below is compiler specific.
#define OTL_STR_TO_BIGINT(str,n) \
{ \
n=strtoll(str,0,10); \
}

// Defining a bigint-to-string conversion
// that is used by OTL internally.
// Since 64-bit ineteger conversion functions are
// not part of the ANSI C++ standard, the code
// below is compiler specific
#define OTL_BIGINT_TO_STR(n,str) \
{ \
sprintf(str,"%lld",n); \
}


#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<bigint>,:f2<char[31]>)",
// SQL statement
db // connect object
);
char tmp[32];

for(OTL_BIGINT i=BIGINT_VAL1;i<=BIGINT_VAL1+100;++i){
int ndx=(int)(i-BIGINT_VAL1);
sprintf(tmp,"Name%d",ndx);
o<<i<<tmp;
}
}

void select()
{
otl_stream i(50, // buffer size
"select f1 :#1<bigint>, f2 "
// the default mapping of f1 needs to be overriden
// explicitly when bigint's are used in a combination
// OTL/OCIx, because the default mapping maps
// Oracle NUMBERs into double containers, which are not
// big enough to hold 64-bit signed integer values.
"from test_tab "
"where f1>=:f<bigint> "
" and f1<=:ff<bigint>",
// SELECT statement
db // connect object
);
// create select stream

OTL_BIGINT f1;
char f2[31];
#if defined(_MSC_VER)
char f1str[40];
#endif

i<<BIGINT_VAL1+8
<<BIGINT_VAL1+16; // assigning :f = 8; :ff = 8
// SELECT automatically executes when all input variables are
// assigned. First portion of output rows is fetched to the buffer

while(!i.eof()){ // while not end-of-data
i>>f1>>f2;
cout<<"f1=";
#if defined(_MSC_VER)
_i64toa(f1,f1str,10);
cout<<f1str<<", f2="<<f2<<endl;
#elif defined(__GNUC__)
cout<<f1<<", f2="<<f2<<endl;
#endif
}

}

int main()
{
otl_connect::otl_initialize(); // initialize OCI environment
try{

db.rlogon("scott/tiger"); // connect to Oracle

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 number, f2 varchar2(30))"
); // create table

insert(); // insert records into table
select(); // select records from table

}

catch(otl_exception& p){ // intercept OTL exceptions
cerr<<p.msg<<endl; // print out error message
cerr<<p.stm_text<<endl; // print out SQL that caused the error
cerr<<p.var_info<<endl; // print out the variable that caused the error
}

db.logoff(); // disconnect from Oracle

return 0;

}

Output

f1=12345678901234008, f2=Name8
f1=12345678901234009, f2=Name9
f1=12345678901234010, f2=Name10
f1=12345678901234011, f2=Name11
f1=12345678901234012, f2=Name12
f1=12345678901234013, f2=Name13
f1=12345678901234014, f2=Name14
f1=12345678901234015, f2=Name15
f1=12345678901234016, f2=Name16

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