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<title>OTL 4.0, Example 473 (OCI7, otl_datetime and Oracle 9i
TIMESTAMP type)</title>
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<h1 align="center">OTL 4.0, Example 473 (OCI7, otl_datetime and Oracle
9i TIMESTAMP type)</h1>
<p>This example demonstrates an INSERT and SELECT with Oracle9i
TIMESTAMPs 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_ORA7">OTL_ORA7</a> // Compile OTL 4.0/OCI7<br><a
name="ex1"></a>#define <a
href="otl3_compile.htm#OTL_ORA7_TIMESTAMP_TO_STRING">OTL_ORA7_TIMESTAMP_TO_STRING(</a>tm,s) \<br>{ \<br> sprintf(s, \<br> "%02d/%02d/%04d %02d:%02d:%02d.%06ld",\<br> tm.month, \<br> tm.day, \<br> tm.year, \<br> tm.hour, \<br> tm.minute, \<br> tm.second, \<br> tm.fraction \<br> ); \<br>}<br><br><a
name="ex2"></a>#define <a
href="otl3_compile.htm#OTL_ORA7_STRING_TO_TIMESTAMP">OTL_ORA7_STRING_TO_TIMESTAMP</a>(s,tm) \<br>{ \<br> sscanf(s, \<br> "%02d/%02d/%04d %02d:%02d:%02d.%06ld", \<br> &tm.month, \<br> &tm.day, \<br> &tm.year, \<br> &tm.hour, \<br> &tm.minute, \<br> &tm.second, \<br> &tm.fraction \<br> ); \<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 "<br> "values(:f1<int>, "<br> " to_timestamp(:f2<char[28]>,'MM/DD/YYYY HH24:MI:SS.FF'))", <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=1;<br> tm.day=19;<br> tm.hour=23;<br> tm.minute=12;<br> tm.second=12;<br> // Second's precision needs to be specified BEFORE the stucture can be<br> // used either for writing or reading timestamp values, which have second's <br> // fractional parts.<br> tm.frac_precision=6;<br> tm.fraction=123456;<br> o<<i;<br> o<<tm; // otl_datetime can be written into a <br> // char[XXX] variable when appropriate <br> // conversion is #<a
href="#ex1">defined</a><br> }<br>}<br><br>void select(void)<br>{ <br> otl_stream i(50, // buffer size<br> "select "<br> " f1, "<br> " to_char(f2,'MM/DD/YYYY HH24:MI:SS.FF') f2 "<br> "from test_tab2 where f1 between :f1<int> and :f1*2",<br> // SELECT statement<br> db // connect object<br> ); <br> // create select stream<br> <br> int f1;<br> otl_datetime f2;<br><br> i<<4; // assigning :f1 = 4<br> // SELECT automatically executes when all input variables are<br> // assigned. First portion of out rows is fetched to the buffer<br><br> // Second's precision needs to be specified BEFORE the stucture can be<br> // used either for writing or reading timestamp values, which have second's <br> // fractional parts.<br> f2.frac_precision=6; // microseconds<br><br> while(!i.eof()){ // while not end-of-data<br> i>>f1;<br> i>>f2; // otl_datetime can be read from a <br> // char[XXX] variable when appropriate <br> // conversion is #<a
href="#ex2">defined</a><br> cout<<"f1="<<f1<<", f2="<<f2.month<<"/"<<f2.day<<"/"<br> <<f2.year<<" "<<f2.hour<<":"<<f2.minute<<":"<br> <<f2.second<<"."<br> <<f2.fraction<br> <<endl;<br> }<br> <br>}</pre>
<pre>int main()<br>{<br> <a href="otl3_connect_class.htm">otl_connect::otl_initialize</a>(); // initialize OCI environment<br> try{<br><br> db.rlogon("scott/tiger"); // connect to Oracle<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 timestamp)"<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.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=4, f2=1/19/2008 23:12:12.123456<br>f1=5, f2=1/19/2008 23:12:12.123456<br>f1=6, f2=1/19/2008 23:12:12.123456<br>f1=7, f2=1/19/2008 23:12:12.123456<br>f1=8, f2=1/19/2008 23:12:12.123456<br><hr
width="100%"></pre>
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<p>Copyright © 1996, 2008, Sergei Kuchin, email: <a
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<a href="mailto:skuchin@gmail.com">skuchin@gmail.com</a>
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