#include <iostream>
#include <stdio.h>
using namespace std;
// Uncomment the line below when OCI7 is used with OTL
// #define OTL_ORA7 // Compile OTL 4.0/OCI7
#define OTL_ORA8I // Compile OTL 4.0/OCI// Uncomment the line below in case of Oracle 9i
//#define OTL_ORA9I
#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];
for(int i=1;i<=100;++i){
sprintf(tmp,"Name%d",i);
o<<(float)i<<tmp;
}
}
void select()
{
otl_stream i(50, // buffer size
"begin "
" open :cur for "
" select * from test_tab "
" where f1>=:f<int> and f1<=:f*2; "
"end;", // PL/SQL block with a reference cursor
db, // connect object
":cur" // reference cursor's placeholder name
);
// create select stream
float f1;
char f2[31];
i<<8; // assigning :f = 8
// SELECT automatically executes when all input variables are
// assigned. First portion of output rows is fetched to the buffer
int n=0;
cout<<"====> Starting a fetch sequence...."<<endl;
while(!i.eof()){ // while not end-of-data
++n;
i>>f1>>f2;
cout<<"f1="<<f1<<", f2="<<f2<<endl;
if(n>=3){
// breaking the fetch sequence after 3 rows are fetched, and
// "cleaning" the state of the SELECT stream.
cout<<"Cancelling the fetch sequence after 3 rows are fetched"<<endl;
i.clean();
break;
}
}
cout<<"====> Starting another fetch sequence..."<<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>>f2;
cout<<"f1="<<f1<<", f2="<<f2<<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 varchar2(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 Oracle
return 0;
}Output
====> Starting a fetch sequence....
f1=8, f2=Name8
f1=9, f2=Name9
f1=10, f2=Name10
Cancelling the fetch sequence after 3 rows are fetched
====> Starting another fetch sequence...
f1=4, f2=Name4
f1=5, f2=Name5
f1=6, f2=Name6
f1=7, f2=Name7
f1=8, f2=Name8Examples ContentsGo
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skuchin@gmail.com. Permission to use, copy, modify and redistribute this document
for
any purpose is hereby granted without fee, provided that the above
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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.