#include <iostream>
using namespace std;
#include <stdio.h>
#define OTL_ORA9I // Compile OTL 4.0/OCI9i
#define OTL_UNICODE // Enable Unicode OTL for OCI9i
#include <otlv4.h> // include the OTL 4.0 header file
otl_connect db; // connect object
void insert()
// insert rows into table
{
otl_stream o(50, // buffer size
"insert into test_tab values(:f1<float>,:f2<char[31]>)",
// SQL statement
db // connect object
);
char tmp[32];
unsigned short tmp2[32]; // Null terminated Unicode character array.
for(int i=1;i<=100;++i){
sprintf(tmp,"Name%d",i);
unsigned short* c2=tmp2;
char* c1=tmp;
// Unicode's first 128 characters are ASCII (0..127), so
// all is needed for converting ASCII into Unicode is as follows:
while(*c1){
*c2=(unsigned char)*c1;
++c1; ++c2;
}
*c2=0; // target Unicode string is null terminated,
// only the null terminator is a two-byte character,
// not one-byte
o<<(float)i;
o<<(unsigned char*)tmp2;
// overloaded operator<<(const unsigned char*) in the case of Unicode
// OTL accepts a pointer to a Unicode character array.
// operator<<(const unsigned short*) wasn't overloaded
// in order to avoid ambiguity in C++ type casting.
}
}
void select()
{
otl_stream i(50, // buffer size
"select * from test_tab where f1>=:f<int> and f1<=:f*2",
// SELECT statement
db // connect object
);
// create select stream
float f1;
unsigned short f2[32];
i<<8; // assigning :f = 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;
i>>(unsigned char*)f2;
// overloaded operator>>(unsigned char*) in the case of Unicode
// OTL accepts a pointer to a Unicode chracter array.
// operator>>(unsigned short*) wasn't overloaded
// in order to avoid ambiguity in C++ type casting.
cout<<"f1="<<f1<<", f2=";
// Unicode's first 128 characters are ASCII, so in order
// to convert Unicode back to ASCII all is needed is
// as follows:
for(int j=0;f2[j]!=0;++j){
cout<<(char)f2[j];
}
cout<<endl;
}
i<<4; // assigning :f = 4
// 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>>(unsigned char*)f2;
cout<<"f1="<<f1<<", f2=";
for(int j=0;f2[j]!=0;++j){
cout<<(char)f2[j];
}
cout<<endl;
}
}
int main()
{
otl_connect::otl_initialize(); // initialize OCI environment
try{
db.rlogon("scott/tiger"); // connect to Oracle
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 number, f2 nvarchar2(30))"
); // create table
db.set_character_set(SQLCS_NCHAR);
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 Oracle
return 0;
}
f1=8, f2=Name8
f1=9, f2=Name9
f1=10, f2=Name10
f1=11, f2=Name11
f1=12, f2=Name12
f1=13, f2=Name13
f1=14, f2=Name14
f1=15, f2=Name15
f1=16, f2=Name16
f1=4, f2=Name4
f1=5, f2=Name5
f1=6, f2=Name6
f1=7, f2=Name7
f1=8, f2=Name8
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.