📄 otl4_ex292.htm
字号:
<!DOCTYPE html PUBLIC "-//w3c//dtd html 4.0 transitional//en">
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html; charset=iso-8859-1">
<meta name="Author" content="Sergei Kuchin">
<meta name="GENERATOR"
content="Mozilla/4.77 [en] (Win95; U) [Netscape]">
<meta name="KeyWords"
content="OTL, Oracle, ODBC, DB2, CLI, database API, C++, Template Library">
<title>OTL 4.0, Example 292 (common interface for
otl_streamotl_refcur_stream)</title>
</head>
<body>
<center>
<h1>OTL 4.0, Example 292 (common interface for otl_stream and
otl_refcur_stream)</h1>
</center>
<h1>
Example 292 (common interface for otl_stream otl_refcur_stream)</h1>
<h2>
Source Code</h2>
<pre>#include <iostream><br>using namespace std;<br><br>#include <stdio.h></pre>
<pre>//#define OTL_ORA8 // Compile OTL 4.0/OCI8<br>#define OTL_ORA8I // Compile OTL 4.0/OCI8i<br>//#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_DECLARE_COMMON_READ_STREAM_INTERFACE">OTL_ORA_DECLARE_COMMON_READ_STREAM_INTERFACE</a><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> o(50, // 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><br> for(int i=1;i<=100;++i){<br> sprintf(tmp,"Name%d",i);<br> o<<i<<tmp;<br> }<br>}<br><br>void fetch(<a
href="otl3_compile.htm#OTL_ORA_DECLARE_COMMON_READ_STREAM_INTERFACE">otl_read_stream_interface</a>& s)<br>{<br> cout<<"===================="<<endl;<br> int f1;<br> char f2[31];<br> while(!s.eof()){ // while not end-of-data<br> s>>f1>>f2;<br> cout<<"f1="<<f1<<", f2="<<f2<<endl;<br> }<br>}<br><br><br>void select()<br>{ <br> <a
href="otl3_stream_class.htm">otl_stream</a> i(1, // buffer size<br> "begin "<br> " open <b>:cur<refcur,out[50]> </b>for "<br> // :cur is a bind variable name, refcur -- its type, <br> // out -- output parameter, 50 -- the buffer size when this<br> // reference cursor will be attached to <a
href="otl4_refcur_stream.htm">otl_refcur_stream<br></a> " select * "<br> " from test_tab "<br> " where f1>=:f<int,in> and f1<=:f*2; "<br> "end;", // PL/SQL block returns a referenced cursor<br> db // connect object<br> ); <br> // create select stream with referenced cursor<br><br> i.set_commit(0); // set stream "auto-commit" to OFF.<br> <br> <a
href="otl4_refcur_stream.htm">otl_refcur_stream</a> s; // reference cursor stream for reading rows.<br><br> i<<8; // assigning :f = 8<br> i<a
href="otl3_stream_class.htm#stream_read_refcur">>></a>s; // initializing the refrence cursor stream with the output <br> // reference cursor.<br> fetch(s);<br> s.close(); // closing the reference cursor<br><br> i<<4; // assigning :f = 4<br> i>>s;<br><br> <a
href="file:///D%7C/oscl/vc/doc/otl4/otl3_stream_class.htm">otl_stream</a> i2(50, // buffer size<br> "select f1, f2 "<br> "from test_tab "<br> "where f1>=:f<int> and f1<=:f*2", // straight SELECT<br> db // connect object<br> ); <br><br> i2<<4; // :f = 4<br> fetch(i2);<br><br>}<br><br>int main()<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 varchar2(30))"<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>====================<br>f1=8, f2=Name8<br>f1=9, f2=Name9<br>f1=10, f2=Name10<br>f1=11, f2=Name11<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>f1=4, f2=Name4<br>f1=5, f2=Name5<br>f1=6, f2=Name6<br>f1=7, f2=Name7<br>f1=8, f2=Name8<br><br><hr
width="100%"></pre>
<center><a href="otl3_examples.htm">Examples</a> <a href="otl3.htm">Contents</a><a
href="home.htm">Go
Home</a></center>
<p>Copyright © 1996, 2008, Sergei Kuchin, email: <a
href="mailto:skuchin@aceweb.com">skuchin@aceweb.com</a>,
<a href="mailto:skuchin@gmail.com">skuchin@gmail.com
<script language="JavaScript">
<!-- hide from old browsers
var modDate = new Date(document.lastModified)
document.write("<i> Last Updated:</i> " + (modDate.getMonth()+1) + "/" +
modDate.getDate() + "/" + "0"+(modDate.getYear())%100+".");
//-->
</script></a>.
</p>
<p><i>Permission to use, copy, modify and redistribute this document
for
any purpose is hereby granted without fee, provided that the above
copyright
notice appear in all copies.</i>
</p>
</body>
</html>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -