OTL 4.0, Example 258 (64-bit signed inregers, Oracle 8/8i/9i)

This example demonstrates a simple INSERT, SELECT, constant SQL statements and bigint's with the OCI8/8i/9i

Source Code

#include <iostream>
using namespace std;

#include <stdio.h>
#define OTL_ORA9I // Compile OTL 4.0/OCI9i
// #define OTL_ORA8
// #define OTL_ORA8I

#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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Copyright © 1996-2014, Sergei Kuchin, email: skuchin@gmail.com, skuchin@gmail.com/a>.

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.