#include <iostream>
using namespace std;
#include <stdio.h>
#define OTL_DB2_CLI // Compile OTL 4.0/DB2-CLI
// Default "numeric" NULLs to (-1)
#define OTL_DEFAULT_NUMERIC_NULL_TO_VAL (-1)
// Default "datetime" NULLs to otl_datetime(2000,1,1,0,0,0)
#define OTL_DEFAULT_DATETIME_NULL_TO_VAL otl_datetime(2000,1,1,0,0,0)
// Default "string" NULLs to "***NULL***"
#define OTL_DEFAULT_STRING_NULL_TO_VAL "***NULL***"
// Default "char" NULLs to '*'
#define OTL_DEFAULT_CHAR_NULL_TO_VAL '*'
#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<float>,:f2<char[31]>,NULL, "
" :f4<timestamp>, :f5<db2date>, :f6<db2time>)",
// SQL statement
db // connect object
);
char tmp[32];
otl_datetime f4(2001,2,24,13,21,11);
otl_datetime f5(2001,2,24,0,0,0);
otl_datetime f6(0,0,0,13,21,11);
for(int i=1;i<=100;++i){
sprintf(tmp,"Name%d",i);
if(i==10)
o<<(float)i<<otl_null()<<otl_null()<<otl_null()<<otl_null();
else
o<<(float)i<<tmp<<f4<<f5<<f6;
}
}
void select()
{
otl_stream i(50, // buffer size
"select f1,f2,f2 f22,f3,f4,f5,f6 "
"from test_tab "
"where f1>=:f11<int> and f1<=:f12<int>*2",
// SELECT statement
db // connect object
);
// create select stream
float f1;
char f2[31];
char f22;
int f3;
otl_datetime f4,f5,f6;
i<<8<<8; // assigning :f11 = 8, :f12=8
// SELECT automatically executes when all input variables are
// assigned. First portion of output rows is fetched to the buffer
cout<<"=====> Fetching rows and printing out default values instead of NULLs"<<endl;
while(!i.eof()){ // while not end-of-data
i>>f1;
cout<<"f1="<<f1<<", ";
i>>f2;
cout<<"f2="<<f2<<", ";
i>>f22;
cout<<"f22="<<f22<<", ";
i>>f3;
cout<<"f3="<<f3<<", ";
i>>f4;
cout<<"f4="<<f4.month<<"/"
<<f4.day<<"/"
<<f4.year<<" "
<<f4.hour<<":"
<<f4.minute<<":"
<<f4.second
<<", ";
i>>f5;
cout<<"f5="<<f5.month<<"/"
<<f5.day<<"/"
<<f5.year
<<", ";
i>>f6;
cout<<"f6="<<f6.hour<<":"
<<f6.minute<<":"
<<f6.second;
cout<<endl;
}
i<<8<<8; // assigning :f11 = 8, :f12=8
cout<<"=====> Fetching rows and printing out NULLs"<<endl;
while(!i.eof()){ // while not end-of-data
i>>f1;
if(i.is_null())
cout<<"f1=NULL, ";
else
cout<<"f1="<<f1<<", ";
i>>f2;
if(i.is_null())
cout<<"f2=NULL, ";
else
cout<<"f2="<<f2<<", ";
i>>f22;
if(i.is_null())
cout<<"f22=NULL, ";
else
cout<<"f22="<<f22<<", ";
i>>f3;
if(i.is_null())
cout<<"f3=NULL, ";
else
cout<<"f3="<<f3<<", ";
i>>f4;
if(i.is_null())
cout<<"f4=NULL,";
else
cout<<"f4="<<f4.month<<"/"
<<f4.day<<"/"
<<f4.year<<" "
<<f4.hour<<":"
<<f4.minute<<":"
<<f4.second
<<", ";
i>>f5;
if(i.is_null())
cout<<"f5=NULL,";
else
cout<<"f5="<<f5.month<<"/"
<<f5.day<<"/"
<<f5.year
<<", ";
i>>f6;
if(i.is_null())
cout<<"f6=NULL,";
else
cout<<"f6="
<<f6.hour<<":"
<<f6.minute<<":"
<<f6.second;
cout<<endl;
}
}
int main()
{
otl_connect::otl_initialize(); // initialize DB2 CLI environment
try{
db.rlogon("scott/tiger@db2sql"); // connect to DB2
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), f3 int, f4 timestamp, f5 date, f6 time)"
); // create table
insert(); // insert records into table
select(); // select records from table
db.logoff(); // disconnect from DB2
}
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
}
return 0;
}
=====> Fetching rows and printing out default values instead of NULLs
f1=8, f2=Name8, f22=N, f3=-1, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=9, f2=Name9, f22=N, f3=-1, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=10, f2=***NULL***, f22=*, f3=-1, f4=1/1/2000 0:0:0, f5=1/1/2000, f6=0:0:0
f1=11, f2=Name11, f22=N, f3=-1, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=12, f2=Name12, f22=N, f3=-1, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=13, f2=Name13, f22=N, f3=-1, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=14, f2=Name14, f22=N, f3=-1, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=15, f2=Name15, f22=N, f3=-1, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=16, f2=Name16, f22=N, f3=-1, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
=====> Fetching rows and printing out NULLs
f1=8, f2=Name8, f22=N, f3=NULL, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=9, f2=Name9, f22=N, f3=NULL, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=10, f2=NULL, f22=NULL, f3=NULL, f4=NULL,f5=NULL,f6=NULL,
f1=11, f2=Name11, f22=N, f3=NULL, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=12, f2=Name12, f22=N, f3=NULL, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=13, f2=Name13, f22=N, f3=NULL, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=14, f2=Name14, f22=N, f3=NULL, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=15, f2=Name15, f22=N, f3=NULL, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
f1=16, f2=Name16, f22=N, f3=NULL, f4=2/24/2001 13:21:11, f5=2/24/2001, f6=13:21:11
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.