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<TITLE>OTL 4.0, Example 93 (otl_long_string container and BLOB column)</TITLE>
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<H1 ALIGN=CENTER>OTL 4.0, Example 93 (otl_long_string container and BLOB
column)</H1>
<H1>Example 93 (otl_long_string container and BLOB column)</H1>
<P>This example demonstrates simple INSERT/SELECT with otl_long_string
container and CLOB column. </P>
<H2>Source Code</H2>
<PRE>#include <iostream>
using namespace std;
#include <stdio.h></PRE>
<PRE>#define OTL_DB2_CLI // Compile OTL 4.0/DB2-CLI
#include <otlv4.h> // include the OTL 4.0 header file
<A HREF="otl3_connect_class.htm">otl_connect</A> db; // connect object
void insert(void)
// insert rows into table
{
<A HREF="otl3_long_string.htm">otl_long_string</A> f2(70000); // define long string variable
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
<A HREF="otl3_stream_class.htm">otl_stream</A> o(1, // buffer size needs to be set to 1
"insert into test_tab values(:f1<int>,:f2<<A HREF="otl3_bind_variables.htm#raw_long">raw_long</A>>)",
// INSERT statement
db // connect object
);
for(int i=1;i<=10;++i){
for(int j=0;j<50000;++j)
f2[j]='*';
f2[50000]='?';
f2.<A HREF="otl3_long_string.htm#set_len">set_len</A>(50001);
o<<i<<f2;
}
}
void select(void)
{
otl_long_string f2(70000); // define long string variable
db.set_max_long_size(70000); // set maximum long string size for connect object
otl_stream i(1, // buffer size needs to be set to 1 in case of CLOB columns
"select * from test_tab",
// SELECT statement
db // connect object
);
// create select stream
int f1;
while(!i.eof()){ // while not end-of-data
i>>f1>>f2;
cout<<"f1="<<f1<<", f2="<<f2[0]<<f2[f2.len()-1]<<", len="<<f2.len()<<endl;
}
}</PRE>
<PRE>int main()
{
<A HREF="otl3_connect_class.htm">otl_connect::otl_initialize</A>(); // initialize DB2 CLI environment
try{
db.rlogon("UID=scott;PWD=tiger;DSN=db2sql"); // connect to DB2
<A HREF="otl3_const_sql.htm">otl_cursor::direct_exec
</A> (
db,
"drop table test_tab",
otl_exception::disabled // disable OTL exceptions
); // drop table
<A HREF="otl3_const_sql.htm">otl_cursor::direct_exec
</A> (
db,
"create table test_tab(f1 int, f2 blob(2M))"
); // create table
insert(); // insert records into table
select(); // select records from table
}
catch(<A HREF="otl3_exception_class.htm">otl_exception</A>& p){ // intercept OTL exceptions
cerr<<p.msg<<endl; // print out error message
cerr<<p.stm_text<<endl; // print out SQL that caused the error
cerr<<p.sqlstate<<endl; // print out SQLSTATE message
cerr<<p.var_info<<endl; // print out the variable that caused the error
}
db.logoff(); // disconnect from DB2
return 0;
}
</PRE>
<H2>Output</H2>
<PRE>f1=1, f2=*?, len=50001
f1=2, f2=*?, len=50001
f1=3, f2=*?, len=50001
f1=4, f2=*?, len=50001
f1=5, f2=*?, len=50001
f1=6, f2=*?, len=50001
f1=7, f2=*?, len=50001
f1=8, f2=*?, len=50001
f1=9, f2=*?, len=50001
f1=10, f2=*?, len=50001
<HR WIDTH="100%"></PRE>
<CENTER><P><A HREF="otl3_examples.htm">Examples</A> <A HREF="otl3.htm">Contents</A>
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<P>Copyright © 1996, 2008, Sergei Kuchin, email: <A HREF="mailto:skuchin@aceweb.com">skuchin@aceweb.com</A>,
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