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<title>OTL 4.0, Example 293 (Simple Insert/Select/Update)</title>
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<h1>OTL 4.0, Example 293 (Simple Insert/Select/Update)</h1>
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<h1>
Example 293 (Simple Insert/Select/Update)</h1>
This example demonstrates simple INSERT, SELECT, UPDATE and constant
SQL
statements. This examples was linked with the TimesTen Client ODBC
Driver library (libttclient.so (Linux/Unix), ttclient.lib (Windows)).
<h2>Source Code</h2>
<pre>#include <iostream><br>using namespace std;<br><br>#include <stdio.h><br>#include <string.h><br>#include <stdlib.h><br><br>#define <a
href="otl3_compile.htm#OTL_ODBC_TIMESTEN_WIN">OTL_ODBC_TIMESTEN_WIN</a> // Compile OTL 4.0/TimesTen ODBC for Windows<br>// Uncomment the following when building this example in Unix/Linux<br>// #define <a
href="otl3_compile.htm#OTL_ODBC_TIMESTEN_UNIX">OTL_ODBC_TIMESTEN_UNIX</a> // Compile OTL 4.0/TimesTen ODBC for Unix<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()<br>// insert rows into table<br>{ <br> <a
href="otl3_stream_class.htm">otl_stream</a><br> o(50, // stream buffer size<br> "insert into test_tab values(:f1<int>,:f2<char[31]>)", <br> // SQL statement<br> db // connect object<br> );<br> char tmp[32];<br> for(int i=1;i<=100;++i){<br> sprintf(tmp,"Name%d",i);<br> o<<i<<tmp;<br> }<br>}</pre>
<pre>void update(const int af1)<br>// insert rows into table<br>{<br> <a
href="otl3_stream_class.htm">otl_stream</a> <br> o(1, // buffer size<br> "UPDATE test_tab "<br> " SET f2=:f2<char[31]> "<br> " WHERE f1=:f1<int>", <br> // UPDATE statement<br> db // connect object<br> );<br><br> o<<"Name changed"<<af1;<br> o<<<a
href="otl3_stream_class.htm#otl_null">otl_null</a>()<<af1+1; // set f2 to NULL<br><br>}</pre>
<pre>void select(const int af1)<br>{ <br> <a
href="otl3_stream_class.htm">otl_stream</a> i(10, // buffer size can be set to a value in [1..128] range<br> "select * from test_tab "<br> "where f1>=:f1<int> "<br> " and f1<=:f1*2", // the same bind variable can be referenced more than<br> // <a
href="otl3_bind_variables.htm#NAMED_BV_NOTATION">once</a> in TimesTen ODBC<br> // SELECT statement<br> db // connect object<br> ); <br> // create select stream<br> <br> int f1;<br> char f2[31];<br><br> i<<af1; // Writing input values into the stream<br> while(!i.eof()){ // while not end-of-data<br> i>>f1;<br> cout<<"f1="<<f1<<", f2=";<br> i>>f2;<br> if(i.is_null())<br> cout<<"NULL";<br> else<br> cout<<f2;<br> cout<<endl;<br> }<br><br>}<br><br>int main()<br>{<br> <a
href="otl3_connect_class.htm">otl_connect::otl_initialize</a>(); // initialize TimesTen ODBC environment<br> try{<br><br> db.rlogon("scott/tiger@TT_tt70_32"); <br><br> <a
href="otl3_const_sql.htm">otl_cursor::direct_exec<br></a> (<br> db,<br> "drop table test_tab",<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_tab(f1 int, f2 varchar(30))"<br> ); // create table<br><br> insert(); // insert records into the table<br> update(10); // update records in the table<br> select(8); // select records from the 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 the database<br><br> return 0;<br><br>}</pre>
<h2>
Output</h2>
<pre>f1=8, f2=Name8<br>f1=9, f2=Name9<br>f1=10, f2=Name changed<br>f1=11, f2=NULL<br>f1=12, f2=Name12<br>f1=13, f2=Name13<br>f1=14, f2=Name14<br>f1=15, f2=Name15<br>f1=16, f2=Name16<br><br><hr
width="100%"></pre>
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