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<title>OTL 4.0, Example 683 (Saimple INSERT/SELECT with MS SQL 2008
datetimeoffset)</title>
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<h1 align="center">OTL 4.0, Example 683 (Simple INSERT/SELECT with MS
SQL 2008 datetimeoffset)</h1>
<p>This example demonstrates simple INSERT and SELECT with MS SQL
Server
2008 DATETIMEOFFSETs and <a href="otl3_stream_class.htm#otl_datetime">otl_datetime</a>.</p>
<h2>Source Code</h2>
<pre>#include <iostream><br>using namespace std;<br><br>#include <stdio.h></pre>
<pre>#define <a href="otl3_compile.htm#OTL_ODBC_MSSQL_2008">OTL_ODBC_MSSQL_2008</a> // Compile OTL 4/ODBC, MS SQL 2008<br>#define <a
href="otl3_compile.htm#OTL_ODBC_TIME_ZONE">OTL_ODBC_TIME_ZONE</a> // enable otl_datime's tz components for ODBC<br><br>// The following two #defines need to be defined in order <br>// to implement OTL support for datetimeoffset<a
href="otl3_compile.htm#OTL_ODBC_TIME_ZONE"><br></a>#define <a
href="otl3_compile.htm#OTL_ODBC_STRING_TO_TIMESTAMP">OTL_ODBC_STRING_TO_TIMESTAMP</a>(str,tm) \<br>{ \<br> sscanf(str, \<br> "%04d-%02d-%02d %02d:%02d:%02d.%07ld %hd:%hd", \<br> &tm.year, \<br> &tm.month, \<br> &tm.day, \<br> &tm.hour, \<br> &tm.minute, \<br> &tm.second, \<br> &tm.fraction, \<br> &tm.tz_hour, \<br> &tm.tz_minute); \<br>}<br><br>#define <a
href="otl3_compile.htm#OTL_ODBC_TIMESTAMP_TO_STRING">OTL_ODBC_TIMESTAMP_TO_STRING</a>(tm,str) \<br>{ \<br> sprintf(str, \<br> "%04d-%02d-%02d %02d:%02d:%02d.%07ld %+hd:%hd", \<br> tm.year, \<br> tm.month, \<br> tm.day, \<br> tm.hour, \<br> tm.minute, \<br> tm.second, \<br> tm.fraction, \<br> tm.tz_hour, \<br> tm.tz_minute); \<br>}<br><br>#include <otlv4.h> // include the OTL 4.0 header file<br><br><a
href="otl3_connect_class.htm">otl_connect</a> db; // connect object<br><br>void insert(void)<br>// insert rows into table<br>{ <br> otl_stream o(50, // buffer size<br> "insert into test_tab2 values(:f1<int>,:f2<char[60]>)", <br> // char[XXX] should be used in binding with datetimeoffset<br> // SQL statement<br> db // connect object<br> );<br><br> otl_datetime tm;<br><br> for(int i=1;i<=10;++i){<br> tm.year=2008;<br> tm.month=10;<br> tm.day=19;<br> tm.hour=23;<br> tm.minute=12;<br> tm.second=12;<br> tm.fraction=1234567;<br> tm.frac_precision=7;<br>// MS SQL 2008's datetimeoffset is "time zone aware", but it doesn't enforce<br>// time zone validity. -5:37 time zone doesn't exist, yet it's perfectly valid<br>// for MS SQL 2008. It looks more like a feature than a bug. If you have a problem<br>// with this feature, report it as a bug to Microsoft.<br> tm.tz_hour=-5;<br> tm.tz_minute=37;<br> o<<i<<tm;<br> }<br>}<br><br>void select(void)<br>{ <br> otl_stream i(50, // buffer size<br> "select * from test_tab2 where f2=:f2<char[60]>",<br> // char[XXX] should be used in binding with datetimeoffset<br> // SELECT statement<br> db // connect object<br> ); <br> // create select stream<br> <br> int f1;<br> otl_datetime tm,f2;<br><br> tm.year=2008;<br> tm.month=10;<br> tm.day=19;<br> tm.hour=23;<br> tm.minute=12;<br> tm.second=12;<br> tm.fraction=1234567;<br> tm.frac_precision=7;<br>// MS SQL 2008's datetimeoffset is "time zone aware", but it doesn't enforce<br>// time zone validity. -5:37 time zone doesn't exist, yet it's perfectly valid<br>// for MS SQL 2008. It looks more like a feature than a bug. If you have a problem<br>// with this feature, report it as a bug to Microsoft. <br> tm.tz_hour=-5;<br> tm.tz_minute=37;<br><br> f2.frac_precision=7;<br><br> i<<tm; // assigning :f1 = tm<br> // SELECT automatically executes when all input variables are<br> // assigned. First portion of out rows is fetched to the buffer<br><br> while(!i.eof()){ // while not end-of-data<br> i>>f1>>f2;<br> cout<<"f1="<<f1<<", f2="<<f2.month<<"/"<<f2.day<<"/"<br> <<f2.year<<" "<<f2.hour<<":"<<f2.minute<<":"<br> <<f2.second<<"."<<f2.fraction;<br> if(f2.tz_hour>=0)<br> cout<<" +"<<f2.tz_hour;<br> else<br> cout<<" "<<f2.tz_hour;<br> cout<<":"<<f2.tz_minute<<endl;<br> }<br> <br>}</pre>
<pre>int main()<br>{<br> <a href="otl3_connect_class.htm">otl_connect::otl_initialize</a>(); // initialize ODBC environment<br> try{<br><br> db.rlogon("scott/tiger@mssql2008"); // connect to ODBC<br><br> <a
href="otl3_const_sql.htm">otl_cursor::direct_exec<br></a> (<br> db,<br> "drop table test_tab2",<br> otl_exception::disabled // disable OTL exceptions<br> ); // drop table<br><br> <a
href="otl3_const_sql.htm">otl_cursor::direct_exec<br></a> (<br> db,<br> "create table test_tab2(f1 int, f2 datetimeoffset(7))"<br> ); // create table<br><br> insert(); // insert records into table<br> select(); // select records from table<br><br> }<br><br> catch(<a
href="otl3_exception_class.htm">otl_exception</a>& p){ // intercept OTL exceptions<br> cerr<<p.msg<<endl; // print out error message<br> cerr<<p.stm_text<<endl; // print out SQL that caused the error<br> cerr<<p.sqlstate<<endl; // print out SQLSTATE message<br> cerr<<p.var_info<<endl; // print out the variable that caused the error<br> }<br><br> db.logoff(); // disconnect from Oracle<br><br> return 0;<br><br>}<br></pre>
<h2>Output</h2>
<pre>f1=1, f2=10/19/2008 23:12:12.1234567 -5:37<br>f1=2, f2=10/19/2008 23:12:12.1234567 -5:37<br>f1=3, f2=10/19/2008 23:12:12.1234567 -5:37<br>f1=4, f2=10/19/2008 23:12:12.1234567 -5:37<br>f1=5, f2=10/19/2008 23:12:12.1234567 -5:37<br>f1=6, f2=10/19/2008 23:12:12.1234567 -5:37<br>f1=7, f2=10/19/2008 23:12:12.1234567 -5:37<br>f1=8, f2=10/19/2008 23:12:12.1234567 -5:37<br>f1=9, f2=10/19/2008 23:12:12.1234567 -5:37<br>f1=10, f2=10/19/2008 23:12:12.1234567 -5:37<br><hr
width="100%"></pre>
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<p>Copyright © 1996, 2008, Sergei Kuchin, email: <a
href="mailto:skuchin@aceweb.com">skuchin@aceweb.com</a>,
<a href="mailto:skuchin@gmail.com">skuchin@yahogmail</a>
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