OTL 4.0, Example 683 (Simple INSERT/SELECT with MS SQL 2008 datetimeoffset)

This example demonstrates simple INSERT and SELECT with MS SQL Server 2008 DATETIMEOFFSETs and otl_datetime.

Source Code

#include <iostream>
using namespace std;

#include <stdio.h>
#define OTL_ODBC_MSSQL_2008 // Compile OTL 4/ODBC, MS SQL 2008
#define OTL_ODBC_TIME_ZONE // enable otl_datime's tz components for ODBC

// The following two #defines need to be defined in order
// to implement OTL support for datetimeoffset
#define OTL_ODBC_STRING_TO_TIMESTAMP(str,tm) \
{ \
sscanf(str, \
"%04d-%02d-%02d %02d:%02d:%02d.%07ld %hd:%hd", \
&tm.year, \
&tm.month, \
&tm.day, \
&tm.hour, \
&tm.minute, \
&tm.second, \
&tm.fraction, \
&tm.tz_hour, \
&tm.tz_minute); \
}

#define OTL_ODBC_TIMESTAMP_TO_STRING(tm,str) \
{ \
sprintf(str, \
"%04d-%02d-%02d %02d:%02d:%02d.%07ld %+hd:%hd", \
tm.year, \
tm.month, \
tm.day, \
tm.hour, \
tm.minute, \
tm.second, \
tm.fraction, \
tm.tz_hour, \
tm.tz_minute); \
}

#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<int>,:f2<char[60]>)",
// char[XXX] should be used in binding with datetimeoffset
// SQL statement
db // connect object
);

otl_datetime tm;

for(int i=1;i<=10;++i){
tm.year=2008;
tm.month=10;
tm.day=19;
tm.hour=23;
tm.minute=12;
tm.second=12;
tm.fraction=1234567;
tm.frac_precision=7;
// MS SQL 2008's datetimeoffset is "time zone aware", but it doesn't enforce
// time zone validity. -5:37 time zone doesn't exist, yet it's perfectly valid
// for MS SQL 2008. It looks more like a feature than a bug. If you have a problem
// with this feature, report it as a bug to Microsoft.
tm.tz_hour=-5;
tm.tz_minute=37;
o<<i<<tm;
}
}

void select(void)
{
otl_stream i(50, // buffer size
"select * from test_tab2 where f2=:f2<char[60]>",
// char[XXX] should be used in binding with datetimeoffset
// SELECT statement
db // connect object
);
// create select stream

int f1;
otl_datetime tm,f2;

tm.year=2008;
tm.month=10;
tm.day=19;
tm.hour=23;
tm.minute=12;
tm.second=12;
tm.fraction=1234567;
tm.frac_precision=7;
// MS SQL 2008's datetimeoffset is "time zone aware", but it doesn't enforce
// time zone validity. -5:37 time zone doesn't exist, yet it's perfectly valid
// for MS SQL 2008. It looks more like a feature than a bug. If you have a problem
// with this feature, report it as a bug to Microsoft.
tm.tz_hour=-5;
tm.tz_minute=37;

f2.frac_precision=7;

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;
if(f2.tz_hour>=0)
cout<<" +"<<f2.tz_hour;
else
cout<<" "<<f2.tz_hour;
cout<<":"<<f2.tz_minute<<endl;
}

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

db.rlogon("scott/tiger@mssql2008"); // connect to ODBC

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 datetimeoffset(7))"
); // 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=10/19/2008 23:12:12.1234567 -5:37
f1=2, f2=10/19/2008 23:12:12.1234567 -5:37
f1=3, f2=10/19/2008 23:12:12.1234567 -5:37
f1=4, f2=10/19/2008 23:12:12.1234567 -5:37
f1=5, f2=10/19/2008 23:12:12.1234567 -5:37
f1=6, f2=10/19/2008 23:12:12.1234567 -5:37
f1=7, f2=10/19/2008 23:12:12.1234567 -5:37
f1=8, f2=10/19/2008 23:12:12.1234567 -5:37
f1=9, f2=10/19/2008 23:12:12.1234567 -5:37
f1=10, f2=10/19/2008 23:12:12.1234567 -5:37

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

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