OTL 4.0, Example 614 (OTL tracing)

This example demonstrates how to use OTL tracing to trace OTL function calls.

Source Code

#include <iostream>
using namespace std;
#include <stdio.h>
unsigned int my_trace_level=
0x1 | // 1st level of tracing
0x2 | // 2nd level of tracing
0x4 | // 3rd level of tracing
0x8 | // 4th level of tracing
0x10; // 5th level of tracing
// each level of tracing is represented by its own bit,
// so levels of tracing can be combined in an arbitrary order.

#define OTL_TRACE_LEVEL my_trace_level
// enables OTL tracing, and uses my_trace_level as a trace control variable.

#define OTL_TRACE_STREAM cerr
// directs all OTL tracing to cerr

#define OTL_TRACE_LINE_PREFIX "MY OTL TRACE ==> "
// redefines the default OTL trace line prefix. This #define is optional

#define OTL_ODBC_ENTERPRISEDB // Compile OTL 4.0/EnterpriseDB-ODBC
// Uncomment the #define below when used in Linux / Unix
//#define OTL_ODBC_UNIX

#include <otlv4.h> // include the OTL 4.0 header file

otl_connect db; // connect object

void insert()
// insert rows into table
{
otl_stream o(10, // buffer size
"insert into test_tab values(:f1<int>,:f2<char[31]>)",
// SQL statement
db // connect object
);
char tmp[32];

for(int i=1;i<=23;++i){
sprintf(tmp,"Name%d",i);
o<<i<<tmp;
}
}

void select()
{
otl_stream i(5, // buffer size
"select * from test_tab where f1>=:f<int> and f1<=:ff<int>*2",
// SELECT statement
db // connect object
);
// create select stream

float f1;
char f2[31];

i<<8<<8; // assigning :f = 8; :ff = 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;
}

}

int main()
{
otl_connect::otl_initialize(); // initialize ODBC environment
try{

db.rlogon("scott/tiger@edbsql"); // connect to the database

otl_cursor::direct_exec
(
db,
"drop table test_tab",
otl_exception::disabled // disable OTL exceptions
); // drop table

otl_cursor::direct_exec
(
db,
"create table test_tab(f1 int, f2 varchar(30))"
); // create table

insert(); // insert records into table
select(); // select records from table

}

catch(otl_exception& 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 the database

return 0;

}

Output

MY OTL TRACE ==> otl_connect(this=0042A1D8)::rlogon(connect_str="/*****@edbsql", auto_commit=0);
MY OTL TRACE ==> otl_cursor::direct_exec(connect=0042A1D0,sqlstm="drop table test_tab",exception_enabled=0);
MY OTL TRACE ==> otl_cursor::direct_exec(connect=0042A1D0,sqlstm="create table test_tab(f1 int, f2 varchar(30))",exception_enabled=1);
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);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=1);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name1");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=2);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name2");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=3);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name3");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=4);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name4");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=5);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name5");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=6);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name6");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=7);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name7");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=8);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name8");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=9);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name9");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=10);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name10");
MY OTL TRACE ==> otl_stream, executing SQL Stm=insert into test_tab values(? ,? ), current batch size=10, row offset=0
MY OTL TRACE ==> otl_connect(this=0042A1D0)::commit();
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=11);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name11");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=12);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name12");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=13);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name13");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=14);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name14");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=15);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name15");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=16);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name16");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=17);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name17");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=18);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name18");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=19);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name19");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=20);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name20");
MY OTL TRACE ==> otl_stream, executing SQL Stm=insert into test_tab values(? ,? ), current batch size=10, row offset=0
MY OTL TRACE ==> otl_connect(this=0042A1D0)::commit();
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=21);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name21");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=22);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name22");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f1, value=23);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(char*: ftype=1, placeholder=:f2, value="Name23");
MY OTL TRACE ==> otl_stream(this=0012FE4C)::close();
MY OTL TRACE ==> otl_stream, executing SQL Stm=insert into test_tab values(? ,? ), current batch size=3, row offset=0
MY OTL TRACE ==> otl_connect(this=0042A1D0)::commit();
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);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:f, value=8);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator <<(int: ftype=4, placeholder=:ff, value=8);
MY OTL TRACE ==> otl_stream, executing SQL Stm=select * from test_tab where f1>=? and f1<=? *2, buffer size=5
MY OTL TRACE ==> otl_stream, fetched the first batch of rows, SQL Stm=select * from test_tab where f1>=? and f1<=? *2, RPC=5
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=8);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name8);
f1=8, f2=Name8
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=9);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name9);
f1=9, f2=Name9
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=10);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name10);
f1=10, f2=Name10
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=11);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name11);
f1=11, f2=Name11
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=12);
MY OTL TRACE ==> otl_stream, fetched the next batch of rows, SQL Stm=select * from test_tab where f1>=? and f1<=? *2, RPC=9
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name12);
f1=12, f2=Name12
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=13);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name13);
f1=13, f2=Name13
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=14);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name14);
f1=14, f2=Name14
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=15);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name15);
f1=15, f2=Name15
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(float& : ftype=4, placeholder=f1, value=16);
MY OTL TRACE ==> otl_stream(this=0012FE4C)::operator >>(char* : ftype=1, placeholder=f2, value=Name16);
f1=16, f2=Name16
MY OTL TRACE ==> otl_stream(this=0012FE4C)::close();
MY OTL TRACE ==> otl_connect(this=0042A1D0)::logoff();



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Copyright © 1996-2017, Sergei Kuchin, email: skuchin@gmail.com, skuchin@gmail.com .

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