OTL 4.0, Example 279 (otl_datetime container and DATE/TIME/TIMESTAMP table columns)

This example demonstrates simple INSERT/SELECT with  DATEs/TIMEs/TIMESTAMPs and otl_datetime.

Source Code

#include <iostream>
using namespace std;

#include <stdio.h>
#define OTL_ODBC // Compile OTL 4.0/ODBC
// #define OTL_ODBC_UNIX // uncomment this line if UnixODBC is used
#include <otlv4.h> // include the OTL 4.0 header file


otl_connect db; // connect object

void insert(void)
// insert rows into table
{
 otl_stream
o(4, // buffer size
     "insert into test_tab "
     "values(:f1<int>,:f2<timestamp>,:f3<timestamp>,:f4<timestamp>)", 
        // INSERT statement
     db // connect object
   );

 otl_datetime tm1,tm2,tm3;

 for(int i=1;i<=10;++i){
// fill out a date value (only date components)
  tm1.year=2008;
  tm1.month=1;
  tm1.day=20;
  tm1.hour=0;
  tm1.minute=0;
  tm1.second=0;
  tm2.year=0;
// fill out a time value (only time components)
  tm2.month=0;
  tm2.day=0;
  tm2.hour=23;
  tm2.minute=12;
  tm2.second=12;
// fill out a timestamp value (both date and time components)
  tm3.year=2008;
  tm3.month=1;
  tm3.day=20;
  tm3.hour=23;
  tm3.minute=12;
  tm3.second=12;
  o<<i<<tm1<<tm2<<tm3;
 }

}

void select(void)

 otl_stream i(5, // stream buffer size can be > great 1 on SELECT.
              "select * from test_tab",
                 // SELECT statement
              db // connect object
             ); 
 
 int f1;
 otl_datetime f2,f3,f4;

 while(!i.eof()){ // while not end-of-data
  i>>f1>>f2>>f3>>f4;
  cout<<"f1="<<f1;
  cout<<", f2="<<f2.month<<"/"<<f2.day<<"/"
      <<f2.year<<" "<<f2.hour<<":"<<f2.minute<<":"
      <<f2.second;
  cout<<", f3="<<f3.month<<"/"<<f3.day<<"/"
      <<f3.year<<" "<<f3.hour<<":"<<f3.minute<<":"
      <<f3.second;
  cout<<", f4="<<f4.month<<"/"<<f4.day<<"/"
      <<f4.year<<" "<<f4.hour<<":"<<f4.minute<<":"
      <<f4.second;
  cout<<endl;
 }
 
}
int main()
{
 otl_connect::otl_initialize(); // initialize ODBC environment
 try{

  db.rlogon("scott/tiger@sqlite");

  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 date, f3 time, f4 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 ODBC

 return 0;

}

Output

f1=1, f2=1/20/2008 0:0:0, f3=0/0/0 23:12:12, f4=1/20/2008 23:12:12
f1=2, f2=1/20/2008 0:0:0, f3=0/0/0 23:12:12, f4=1/20/2008 23:12:12
f1=3, f2=1/20/2008 0:0:0, f3=0/0/0 23:12:12, f4=1/20/2008 23:12:12
f1=4, f2=1/20/2008 0:0:0, f3=0/0/0 23:12:12, f4=1/20/2008 23:12:12
f1=5, f2=1/20/2008 0:0:0, f3=0/0/0 23:12:12, f4=1/20/2008 23:12:12
f1=6, f2=1/20/2008 0:0:0, f3=0/0/0 23:12:12, f4=1/20/2008 23:12:12
f1=7, f2=1/20/2008 0:0:0, f3=0/0/0 23:12:12, f4=1/20/2008 23:12:12
f1=8, f2=1/20/2008 0:0:0, f3=0/0/0 23:12:12, f4=1/20/2008 23:12:12
f1=9, f2=1/20/2008 0:0:0, f3=0/0/0 23:12:12, f4=1/20/2008 23:12:12
f1=10, f2=1/20/2008 0:0:0, f3=0/0/0 23:12:12, f4=1/20/2008 23:12:12


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Copyright 1996-2017, Sergei Kuchin, email: skuchin@gmail.com, skuchin@gmail.com .

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