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<TITLE>OTL 4.0, Example 62 (Insert and Select via referenced cursor for Oracle 8i)</TITLE>
<META NAME="Author" CONTENT="Sergei Kuchin">
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<H1 ALIGN=CENTER>OTL 4.0, Example 62 (Insert and Select via referenced
cursor for Oracle 8i)</H1>
<H1><A NAME="example1"></A>Example 62 (Insert and Select via referenced
cursor for Oracle 8i)</H1>
<P>This example demonstrates a simple INSERT, SELECT (via refernced cursor),
and constant SQL statements. Referenced cursors in Oracle 8i are slightly
different from referenced cursors in Oracle 8, so the code generation of
OCI8 function calls for OCI8 in Oracle 8i is different from OCI8 in Oracle
8. Therefore, a new #define was introduced: OTL_ORA8I. </P>
<H2>Source Code</H2>
<PRE>#include <iostream>
using namespace std;
#include <stdio.h></PRE>
<PRE>#define OTL_ORA8I // Compile OTL 4.0/OCI8 in the Oracle 8i environment.
#include <otlv4.h> // include the OTL 4.0 header file
<A HREF="otl3_connect_class.htm">otl_connect</A> db; // connect object
void insert()
// insert rows into table
{
<A HREF="otl3_stream_class.htm">otl_stream</A> o(50, // buffer size
"insert into test_tab values(:f1<float>,:f2<char[31]>)",
// SQL statement
db // connect object
);
char tmp[32];
for(int i=1;i<=100;++i){
sprintf(tmp,"Name%d",i);
o<<(float)i<<tmp;
}
}
void select()
{
<A HREF="otl3_stream_class.htm">otl_stream</A> i(50, // buffer size
"begin "
" open <B>:cur</B> for "
" select * "
" from test_tab "
" where f1>=:f<int> and f1<=:f*2; "
"end;", // PL/SQL block returns a referenced cursor
db, // connect object
":cur" // <A HREF="otl3_stream_class.htm#ref_cur">referenced cursor placeholder name
</A> );
// create select stream with referenced cursor
float f1;
char f2[31];
i<<8; // assigning :f = 8
// SELECT automatically executes when all input variables are
// assigned. First portion of output rows is fetched to the buffer
while(!i.eof()){ // while not end-of-data
i>>f1>>f2;
cout<<"f1="<<f1<<", f2="<<f2<<endl;
}
i<<4; // assigning :f = 4
// SELECT automatically executes when all input variables are
// assigned. First portion of output rows is fetched to the buffer
while(!i.eof()){ // while not end-of-data
i>>f1>>f2;
cout<<"f1="<<f1<<", f2="<<f2<<endl;
}
}
int main()
{
<A HREF="otl3_connect_class.htm">otl_connect::otl_initialize</A>(); // initialize OCI environment
try{
db.rlogon("scott/tiger"); // connect to Oracle
<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 number, f2 varchar2(30))"
); // 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.var_info<<endl; // print out the variable that caused the error
}
db.logoff(); // disconnect from Oracle
return 0;
}
</PRE>
<H2>Output</H2>
<PRE>f1=8, f2=Name8
f1=9, f2=Name9
f1=10, f2=Name10
f1=11, f2=Name11
f1=12, f2=Name12
f1=13, f2=Name13
f1=14, f2=Name14
f1=15, f2=Name15
f1=16, f2=Name16
f1=4, f2=Name4
f1=5, f2=Name5
f1=6, f2=Name6
f1=7, f2=Name7
f1=8, f2=Name8
<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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<P><I>Permission to use, copy, modify and redistribute this document for
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