OTL 4.0, Example 548 (TIMESTAMP_STRUCT and Sybase SQL Server)

This example demonstrates simple INSERT and SELECT with Sybase SQL Server DATETIMEs and TIMESTAMP_STRUCTs.

Source Code

#include <iostream>
using namespace std;

#include <stdio.h>

#define OTL_ODBC_UNIX // Compile OTL 4.0/ODBC
#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(50, // buffer size
              "insert into test_tab2 values(:f1<float>,:f2<timestamp>)", 
                 // SQL statement
              db // connect object
             );

 TIMESTAMP_STRUCT 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.fraction=0;
  o<<(float)i<<tm;
 }
}

void select(void)
{ 
 otl_stream i(50, // buffer size
              "select * from test_tab2 where f2=:f1<timestamp>",
                 // SELECT statement
              db // connect object
             ); 
   // create select stream
 
 int f1;
 TIMESTAMP_STRUCT tm,f2;

 tm.year=1998;
 tm.month=10;
 tm.day=19;
 tm.hour=23;
 tm.minute=12;
 tm.second=12;
 tm.fraction=0;

 i<<tm; // assigning :f1 = tm
   // SELECT automatically executes when all input variables are
   // assigned. First portion of out rows is fetched to the buffer

 while(!i.eof()){ // while not end-of-data
  i>>f1>>f2;
  cout<<"f1="<<f1<<", f2="<<f2.month<<"/"<<f2.day<<"/"
      <<f2.year<<" "<<f2.hour<<":"<<f2.minute<<":"
      <<f2.second<<"."<<f2.fraction
      <<endl;
 }
 
}

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

  db.rlogon("scott/tigger@freetds_sybsql"); // connect to ODBC
// It's recommended to use auto_commit_off() when OTL is used
// with FreeTDS/ODBC against Sybase in order to set the DB
// session's auto-commit to OFF. otl_connect::rlogon()'s auto-commit 
// parameter has not effect. auto_commit_off() is a workaround, until
// a fix becomes available.
  db.auto_commit_off();

  otl_cursor::direct_exec
   (
    db,
    "drop table test_tab2",
    otl_exception::disabled // disable OTL exceptions
   ); // drop table

  otl_cursor::direct_exec
   (
    db,
    "create table test_tab2(f1 int, f2 datetime)"
    );  // 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;

}

Output

f1=1, f2=10/19/1998 23:12:12.0
f1=2, f2=10/19/1998 23:12:12.0
f1=3, f2=10/19/1998 23:12:12.0
f1=4, f2=10/19/1998 23:12:12.0
f1=5, f2=10/19/1998 23:12:12.0
f1=6, f2=10/19/1998 23:12:12.0
f1=7, f2=10/19/1998 23:12:12.0
f1=8, f2=10/19/1998 23:12:12.0
f1=9, f2=10/19/1998 23:12:12.0
f1=10, f2=10/19/1998 23:12:12.0

Examples Contents Go Home

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.