#include <iostream>
using namespace std;
#include <stdio.h>
#define OTL_ORA9I // Compile OTL 4.0/OCI9i
// Uncomment the line below in case of OCI8.1.7 that
// used against Oracle 9i.
//#define OTL_ORA8I
#if (defined(__clang__) || defined(__GNUC__)) && defined(OTL_CPP_14_ON)
// enable OTL support for std::optional when clang or g++ is used and
// when -std=c++14 or higher switch is used
#define OTL_STREAM_WITH_STD_OPTIONAL_ON
#endif
#if defined(_MSC_VER) && (_MSC_VER>=1910) && defined(OTL_CPP_17_ON)
// VC++ 2017 or higher when /std=c++latest is used
#define OTL_STREAM_WITH_STD_OPTIONAL_ON
#endif
#define OTL_ORA_TIMESTAMP
#include <otlv4.h> // include the OTL 4.0 header file
#if (defined(__clang__) || defined(__GNUC__)) && defined(OTL_CPP_14_ON) \
&& defined(OTL_STREAM_WITH_STD_OPTIONAL_ON)
// for clang or g++, when they use -std=c++14 or higher
#include <experimental/optional>
#endif
#if defined(_MSC_VER) && (_MSC_VER>=1910) && defined(OTL_CPP_17_ON)
// VC++ 2017 or higher when /std=c++latest is used
#include <optional>
#endif
otl_connect db; // connect object
void insert(void)
// insert rows into table
{
otl_stream o(3, // stream buffer size in logical rows.
"insert into test_tab "
"values(:f1<int>,:f2<timestamp>)",
// INSERT statement
db // connect object
);
otl_datetime tm;
for(int i=1;i<=10;++i){
tm.year=1998;
tm.month=10;
tm.day=19;
tm.hour=23;
tm.minute=12;
tm.second=12;
tm.frac_precision=6; // microseconds
tm.fraction=123456;
#if (defined(__clang__) || defined(__GNUC__)) && defined(OTL_CPP_14_ON) \
&& defined(OTL_STREAM_WITH_STD_OPTIONAL_ON)
// for clang or g++, when they use -std=c++14 or higher
std::experimental::optional<otl_datetime> tm2;
if(i!=5)
tm2=tm;
o<<i<<tm2;
#elif defined(_MSC_VER) && (_MSC_VER>=1910) && defined(OTL_CPP_17_ON)
// VC++ 2017 or higher when /std=c++latest is used
std::optional<otl_datetime> tm2;
if(i!=5)
tm2=tm;
o<<i<<tm2;
#else
if(i!=5)
o<<i<<tm;
else
o<<i<<otl_null();
#endif
}
}
void select(void)
{
otl_stream i(5, // stream buffer size in logical rows
"select * from test_tab",
// SELECT statement
db // connect object
);
#if (defined(__clang__) || defined(__GNUC__)) && defined(OTL_CPP_14_ON) \
&& defined(OTL_STREAM_WITH_STD_OPTIONAL_ON)
// for clang or g++, when they use -std=c++14 or higher
std::experimental::optional<int> f1;
std::experimental::optional<otl_datetime> f2;
#elif defined(_MSC_VER) && (_MSC_VER>=1910) && defined(OTL_CPP_17_ON)
// VC++ 2017 or higher when /std=c++latest is used
std::optional<int> f1;
std::optional<otl_datetime> f2;
#else
int f1=0;
otl_datetime f2;
#endif
while(!i.eof()){ // while not end-of-data
#if (defined(__clang__) || defined(__GNUC__)) && defined(OTL_CPP_14_ON) \
&& defined(OTL_STREAM_WITH_STD_OPTIONAL_ON)
// for clang or g++, when they use -std=c++14 or higher
// Second's precision needs to be specified BEFORE the structure can be
// used either for writing or reading timestamp values, which have second's
// fractional part.
f2.emplace(otl_datetime());
f2->frac_precision=6; // microseconds
i>>f1>>f2;
cout<<"f1="<<*f1;
if(!f2)
cout<<", f2=NULL";
else
cout<<", f2="<<f2->month<<"/"<<f2->day<<"/"
<<f2->year<<" "<<f2->hour<<":"<<f2->minute<<":"
<<f2->second<<"."
<<f2->fraction;
#elif defined(_MSC_VER) && (_MSC_VER>=1910) && defined(OTL_CPP_17_ON)
// VC++ 2017 or higher when /std=c++latest is used
f2.emplace(otl_datetime());
f2->frac_precision=6; // microseconds
i>>f1>>f2;
cout<<"f1="<<*f1;
if(!f2)
cout<<", f2=NULL";
else
cout<<", f2="<<f2->month<<"/"<<f2->day<<"/"
<<f2->year<<" "<<f2->hour<<":"<<f2->minute<<":"
<<f2->second<<"."
<<f2->fraction;
#else
// Second's precision needs to be specified BEFORE the stucture can be
// used either for writnig or reading timestamp values, which have second's
// fractional part.
f2.frac_precision=6; // microseconds
i>>f1>>f2;
cout<<"f1="<<f1;
if(i.is_null())
cout<<", f2=NULL";
else
cout<<", f2="<<f2.month<<"/"<<f2.day<<"/"
<<f2.year<<" "<<f2.hour<<":"<<f2.minute<<":"
<<f2.second<<"."
<<f2.fraction;
#endif
cout<<endl;
}
}
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 int, f2 timestamp)"
); // 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.sqlstate<<endl; // print out SQLSTATE message
cerr<<p.var_info<<endl; // print out the variable that caused the error
}
db.logoff(); // disconnect from Oracle
return 0;
}
f1=1, f2=10/19/1998 23:12:12.123456
f1=2, f2=10/19/1998 23:12:12.123456
f1=3, f2=10/19/1998 23:12:12.123456
f1=4, f2=10/19/1998 23:12:12.123456
f1=5, f2=NULL
f1=6, f2=10/19/1998 23:12:12.123456
f1=7, f2=10/19/1998 23:12:12.123456
f1=8, f2=10/19/1998 23:12:12.123456
f1=9, f2=10/19/1998 23:12:12.123456
f1=10, f2=10/19/1998 23:12:12.123456
Copyright © 1996-2024, 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.