This example demonstrates how to use OTL tracing to trace OTL function calls.
#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;
}
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();
Copyright © 1996-2024, Sergei Kuchin, email: skuchin@gmail.com, skuchin@gmail.com .
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. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.