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<title>OTL 4.0, Example 227 (otl_datetime container and datetime/date
table containers)</title>
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<h1>OTL 4.0, Example 227 (otl_datetime container and datetime/date
table columns,
MyODBC 3.50)</h1>
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<h1>
Example 227 (otl_datetime container and datetime/date table columns,
MyODBC
3.50)</h1>
This example demonstrates simple INSERT/SELECT with MySQL's
DATETIMEs/DATEs
and <a href="otl3_stream_class.htm#otl_datetime">otl_datetime</a>.
<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">OTL_ODBC</a> // Compile OTL 4.0/ODBC<br>// The following #define is required with MyODBC 3.51.11 and higher<br>#define <a
href="otl3_compile.htm#OTL_ODBC_SELECT_STM_EXECUTE_BEFORE_DESCRIBE">OTL_ODBC_SELECT_STM_EXECUTE_BEFORE_DESCRIBE</a><br>// #define OTL_ODBC_UNIX // uncomment this line if UnixODBC is used<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(1, // buffer size should be == 1 on INSERT<br> "insert into test_tab2 "<br> "values(:f1<int>,:f2<timestamp>,:f3<timestamp>)", <br> // INSERT statement<br> db // connect object<br> );<br> o.set_commit(0); // turn off the stream's "auto-commit", because MySQL<br> // does not have any transaction support [yet].<br> otl_datetime tm;<br><br> for(int i=1;i<=10;++i){<br> tm.year=1998;<br> tm.month=10;<br> tm.day=19;<br> tm.hour=23;<br> tm.minute=12;<br> tm.second=12;<br> o<<i<<tm<<tm;<br> }<br>}<br><br>void select(void)<br>{ <br> otl_stream i(50, // buffer size may be > 1<br> "select * from test_tab2",<br> // SELECT statement<br> db // connect object<br> ); <br> // create select stream<br> <br> int f1;<br> otl_datetime f2,f3;<br><br> while(!i.eof()){ // while not end-of-data<br> i>>f1>>f2>>f3;<br> cout<<"f1="<<f1;<br> cout<<", f2="<<f2.month<<"/"<<f2.day<<"/"<br> <<f2.year<<" "<<f2.hour<<":"<<f2.minute<<":"<br> <<f2.second;<br> cout<<", f3="<<f3.month<<"/"<<f3.day<<"/"<br> <<f3.year<<" "<<f3.hour<<":"<<f3.minute<<":"<br> <<f3.second;<br> cout<<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@mysql35"); // 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 datetime, f3 date)"<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 ODBC<br><br> return 0;<br><br>}</pre>
<h2>
Output</h2>
<pre>f1=1, f2=10/19/1998 23:12:12, f3=10/19/1998 0:0:0 <br>f1=2, f2=10/19/1998 23:12:12, f3=10/19/1998 0:0:0<br>f1=3, f2=10/19/1998 23:12:12, f3=10/19/1998 0:0:0<br>f1=4, f2=10/19/1998 23:12:12, f3=10/19/1998 0:0:0<br>f1=5, f2=10/19/1998 23:12:12, f3=10/19/1998 0:0:0<br>f1=6, f2=10/19/1998 23:12:12, f3=10/19/1998 0:0:0<br>f1=7, f2=10/19/1998 23:12:12, f3=10/19/1998 0:0:0<br>f1=8, f2=10/19/1998 23:12:12, f3=10/19/1998 0:0:0<br>f1=9, f2=10/19/1998 23:12:12, f3=10/19/1998 0:0:0<br>f1=10, f2=10/19/1998 23:12:12, f3=10/19/1998 0:0:0<br><br><br><br><br><br><hr
width="100%"></pre>
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