📄 otl4_ex614.htm
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<html>
<head>
<title>OTL 4.0, Example 614 (OTL tracing)</title>
<meta content="Sergei Kuchin" name="Author">
<meta content="Mozilla/3.03Gold (Win95; I) [Netscape]"
name="GENERATOR">
<meta
content="OTL, Oracle, ODBC, DB2, CLI, database API, C++, Template Library"
name="KeyWords">
</head>
<body>
<h1 align="center">OTL 4.0, Example 614 (OTL tracing)</h1>
<p>This example demonstrates how to use OTL tracing to trace OTL
function calls.</p>
<h2>Source Code</h2>
<pre>#include <iostream><br>using namespace std;<br>#include <stdio.h></pre>
<pre>unsigned int my_trace_level=<br><span style="color: rgb(0, 0, 0);"> 0x1 | // 1st level of tracing</span><br
style="color: rgb(0, 0, 0);"><span style="color: rgb(0, 0, 0);"> 0x2 | // 2nd level of tracing</span><br
style="color: rgb(0, 0, 0);"><span style="color: rgb(0, 0, 0);"> 0x4 | // 3rd level of tracing</span><br
style="color: rgb(0, 0, 0);"><span style="color: rgb(0, 0, 0);"> 0x8 | // 4th level of tracing<br> 0x10; // 5th level of tracing<br></span>// each level of tracing is represented by its own bit, <br>// so levels of tracing can be combined in an arbitrary order.<br><br>#define <a
href="otl3_compile.htm#OTL_TRACE">OTL_TRACE_LEVEL</a> my_trace_level <br> // enables OTL tracing, and uses my_trace_level as a trace control variable.<br><br>#define OTL_TRACE_STREAM cerr <br> // directs all OTL tracing to cerr<br><br>#define OTL_TRACE_LINE_PREFIX "MY OTL TRACE ==> " <br> // redefines the default OTL trace line prefix. This #define is optional<br><br>#define <a
href="otl3_compile.htm#OTL_ODBC_ENTERPRISEDB">OTL_ODBC_ENTERPRISEDB</a> // Compile OTL 4.0/EnterpriseDB-ODBC<br>// Uncomment the #define below when used in Linux / Unix<br>//#define OTL_ODBC_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> o(10, // 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<=23;++i){<br> sprintf(tmp,"Name%d",i);<br> o<<i<<tmp;<br> }<br>}<br><br>void select()<br>{ <br> <a
href="otl3_stream_class.htm">otl_stream</a> i(5, // buffer size<br> "select * from test_tab where f1>=:f<int> and f1<=:ff<int>*2",<br> // SELECT statement<br> db // connect object<br> ); <br> // create select stream<br> <br> float f1;<br> char f2[31];<br><br> i<<8<<8; // assigning :f = 8; :ff = 8<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;<br> cout<<"f1="<<f1<<", f2="<<f2<<endl;<br> }<br><br>}<br><br>int main()<br>{<br> <a
href="otl3_connect_class.htm">otl_connect::otl_initialize</a>(); // initialize ODBC environment<br> try{<br><br> db.rlogon("scott/tiger@edbsql"); // connect to the database<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 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 the database<br><br> return 0;<br><br>}<br></pre>
<h2>Output</h2>
<pre><span style="color: rgb(0, 0, 0);">MY OTL TRACE ==> otl_connect(this=0042A1D8)::rlogon(connect_str="/*****@edbsql", auto_commit=0);<br>MY OTL TRACE ==> otl_cursor::direct_exec(connect=0042A1D0,sqlstm="drop table test_tab",exception_enabled=0);<br>MY OTL TRACE ==> otl_cursor::direct_exec(connect=0042A1D0,sqlstm="create table test_tab(f1 int, f2 varchar(30))",exception_enabled=1);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::open(buffer_size=10, sqlstm=insert into test_tab values(:f1<int>,:f2<char[31]>), connect=0042A1D0, implicit_select=0);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=1);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name1");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=2);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name2");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=3);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name3");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=4);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name4");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=5);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name5");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=6);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name6");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=7);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name7");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=8);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name8");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=9);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name9");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=10);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name10");<br>MY OTL TRACE ==> otl_stream, executing SQL Stm=insert into test_tab values(? ,? ), current batch size=10, row offset=0<br>MY OTL TRACE ==> otl_connect(this=0042A1D0)::commit();<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=11);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name11");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=12);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name12");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=13);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name13");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=14);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name14");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=15);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name15");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=16);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name16");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=17);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name17");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=18);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name18");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=19);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name19");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=20);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name20");<br>MY OTL TRACE ==> otl_stream, executing SQL Stm=insert into test_tab values(? ,? ), current batch size=10, row offset=0<br>MY OTL TRACE ==> otl_connect(this=0042A1D0)::commit();<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=21);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name21");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=22);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name22");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=23);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name23");<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::close();<br>MY OTL TRACE ==> otl_stream, executing SQL Stm=insert into test_tab values(? ,? ), current batch size=3, row offset=0<br>MY OTL TRACE ==> otl_connect(this=0042A1D0)::commit();<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::open(buffer_size=5, sqlstm=select * from test_tab where f1>=:f<int> and f1<=:ff<int>*2, connect=0042A1D0, implicit_select=0);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f, value=8);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:ff, value=8);<br>MY OTL TRACE ==> otl_stream, executing SQL Stm=select * from test_tab where f1>=? and f1<=? *2, buffer size=5<br>MY OTL TRACE ==> otl_stream, fetched the first batch of rows, SQL Stm=select * from test_tab where f1>=? and f1<=? *2, RPC=5<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=8);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name8);<br>f1=8, f2=Name8<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=9);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name9);<br>f1=9, f2=Name9<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=10);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name10);<br>f1=10, f2=Name10<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=11);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name11);<br>f1=11, f2=Name11<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=12);<br>MY OTL TRACE ==> otl_stream, fetched the next batch of rows, SQL Stm=select * from test_tab where f1>=? and f1<=? *2, RPC=9<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name12);<br>f1=12, f2=Name12<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=13);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name13);<br>f1=13, f2=Name13<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=14);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name14);<br>f1=14, f2=Name14<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=15);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name15);<br>f1=15, f2=Name15<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=16);<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name16);<br>f1=16, f2=Name16<br>MY OTL TRACE ==> otl_stream(this=0012FE4C)::close();<br>MY OTL TRACE ==> otl_connect(this=0042A1D0)::logoff();<br><br></span><br><hr
width="100%"></pre>
<center>
<p><a href="otl3_examples.htm">Examples</a> <a href="otl3.htm">Contents</a>
<a href="home.htm">Go Home</a> </p>
</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@yahogmail</a>
<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>.</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>
<script type="text/javascript">
var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
</script>
<script type="text/javascript">
var pageTracker = _gat._getTracker("UA-5456201-1");
pageTracker._trackPageview();
</script>
</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 + -