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<title>OTL 4.0, Example 286 (UTF8 Insert/Select for both CLOB and
NCLOB at the same time)</title>
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<h1>OTL 4.0, Example 496 (UTF8 Insert/Select for both CLOB
and NCLOB at the same time)</h1>
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This example demonstrates simple UTF8 INSERT, SELECT for both CLOB
and NCLOB at the same time. <br>
<h2>Source Code</h2>
<pre>#include <iostream><br>using namespace std;<br><br>#include <stdio.h></pre>
<pre>#define OTL_ORA9I // Compile OTL 4.0/OCI9i<br>//#define OTL_ORA10G // Compile OTL 4.0/OCI10g<br>#define <a
href="otl3_compile.htm#OTL_ORA_UTF8">OTL_ORA_UTF8</a> // Enable UTF8 OTL for OCI8i<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_long_string.htm#otl_long_string">otl_long_string</a> f2(70000); // define long string variable<br> db.<a
href="otl3_connect_class.htm#set_max_long_size">set_max_long_size</a>(70000); // set maximum long string size for connect object<br><br> <a
href="otl3_stream_class.htm">otl_stream</a> o(1, // buffer size has to be set to 1 for operations with CLOBs<br> "insert into test_tab values(:f1<int>,empty_clob(),empty_clob())"<br> "returning f2, f3 into :f2<<a
href="otl3_bind_variables.htm#clob">clob</a>>, :f3<<a
href="otl3_bind_variables.htm#nclob">nclob</a>>", <br> // SQL statement<br> db // connect object<br> );<br><br> for(int i=1;i<=20;++i){<br> for(int j=0;j<50000;++j)<br> f2[j]='*';<br> f2[50000]='?';<br> f2.<a
href="otl3_long_string.htm#unicode_set_len">set_len</a>(50001);<br> o<<i<<f2<<f2;<br> }<br><br>}<br><br>void select()<br>{ <br> <a
href="otl3_long_string.htmotl_long_string">otl_long_string</a> f2(70000); // define long string variable<br> <a
href="otl3_long_string.htmotl_long_string">otl_long_string</a> f3(70000); // define long string variable<br> db.<a
href="otl3_connect_class.htm#set_max_long_size">set_max_long_size</a>(70000); // set maximum long string size for connect object<br><br> <a
href="otl3_stream_class.htm">otl_stream</a> i(10, // buffer size <br> "select "<br> " f1, f2, f3 "<br> "from test_tab "<br> "where f1>=:f<int> "<br> " and f1<=:f*2",<br> // SELECT statement<br> db // connect object<br> ); <br> // create select stream<br> <br> int f1;<br><br> i<<4; // assigning :f = 4<br> // SELECT automatically executes when all input variables are<br> // assigned. First portion of output rows is fetched to the buffer<br><br> while(!i.eof()){ // while not end-of-data<br> i>>f1>>f2>>f3;<br> cout<<"f1="<<f1;<br> cout<<", f2="<<f2[0]<<f2[f2.len()-1]<<", len="<<f2.len();<br> cout<<", f3="<<f3[0]<<f3[f3.len()-1]<<", len="<<f3.len();<br> cout<<endl;<br> }<br><br>}<br><br>int main()<br>{<br> putenv(const_cast<char*>("NLS_LANG=.AL32UTF8")); // set your Oracle Client NLS_LANG <br> // if its default was set to something else<br><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_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 number, f2 clob, f3 nclob)"<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>}</pre>
<h2>
Output</h2>
<pre>f1=4, f2=*?, len=50001, f3=*?, len=50001<br>f1=5, f2=*?, len=50001, f3=*?, len=50001<br>f1=6, f2=*?, len=50001, f3=*?, len=50001<br>f1=7, f2=*?, len=50001, f3=*?, len=50001<br>f1=8, f2=*?, len=50001, f3=*?, len=50001<br><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
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