#include <iostream>
using namespace std;
#include <stdio.h>
#define OTL_ODBC // Compile OTL 4.0/ODBC
// The following #define is required with MyODBC 3.51.11 and higher
#define OTL_ODBC_SELECT_STM_EXECUTE_BEFORE_DESCRIBE
// #define OTL_ODBC_UNIX // uncomment this line if UnixODBC is used
#include <otlv4.h> // include the OTL 4.0 header file
otl_connect db; // connect object
void insert(void)
// insert rows into table
{
otl_long_string f2(7000); // define long string variable
db.set_max_long_size(7000); // set maximum long string size for connect object
otl_stream o(1, // buffer size needs to be set to 1
"insert into test_tab values "
"(:f1<int>,:f2<varchar_long>), "
"(:f12<int>,:f22<varchar_long>), "
"(:f13<int>,:f23<varchar_long>), "
"(:f14<int>,:f24<varchar_long>), "
"(:f15<int>,:f25<varchar_long>) ",
// INSERT statement. Multiple sets of values can be used
// to work around the lack of the bulk interface
db // connect object
);
// If the number of rows to be inserted is not known in advance,
// another stream with the same INSERT can be opened
otl_stream o2(1, // buffer size needs to be set to 1
"insert into test_tab values "
"(:f1<int>,:f2<varchar_long>)",
// INSERT statement
db // connect object
);
int i,j;
for(i=1;i<=10;++i){
for(j=0;j<5000;++j)
f2[j]='*';
f2[5000]='?';
f2.set_len(5001);
o<<i<<f2;
}
for(i=11;i<=103;++i){
for(j=0;j<5000;++j)
f2[j]='*';
f2[5000]='?';
f2.set_len(5001);
o2<<i<<f2;
}
}
void select(void)
{
otl_long_string f2(7000); // define long string variable
db.set_max_long_size(7000); // set maximum long string size for connect object
otl_stream i(1, // buffer size needs to be set to 1 in case of TEXT columns
"select * from test_tab",
// SELECT statement
db // connect object
);
// create select stream
int f1;
while(!i.eof()){ // while not end-of-data
i>>f1>>f2;
cout<<"f1="<<f1<<", f2="<<f2[0]<<f2[f2.len()-1]<<", len="<<f2.len()<<endl;
}
}
int main()
{
otl_connect::otl_initialize(); // initialize ODBC environment
try{
db.rlogon("UID=scott;PWD=tiger;DSN=mysql35"); // connect to ODBC
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 longtext) type=innoDB"
); // 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.sqlstate<<endl; // print out SQLSTATE message
cerr<<p.var_info<<endl; // print out the variable that caused the error
}
db.logoff(); // disconnect from ODBC
return 0;
}
f1=1, f2=*?, len=5001
f1=2, f2=*?, len=5001
f1=3, f2=*?, len=5001
f1=4, f2=*?, len=5001
f1=5, f2=*?, len=5001
f1=6, f2=*?, len=5001
f1=7, f2=*?, len=5001
f1=8, f2=*?, len=5001
f1=9, f2=*?, len=5001
f1=10, f2=*?, len=5001
f1=11, f2=*?, len=5001
f1=12, f2=*?, len=5001
f1=13, f2=*?, len=5001
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.