OTL 4.0, Example 735 (Insert and Select via a PL/SQL function that returns a referenced cursor)

This example demonstrates a simple INSERT, SELECT via a PL/SQL function that returns a reference cursor, and constant SQL statements.

Source Code

#include <iostream>
using namespace std;

#include <stdio.h>
#define OTL_ORA8 // Compile OTL 4.0/OCI8
#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<int>,:f2<char[31]>)",
// SQL statement
db // connect object
);
char tmp[32];

for(int i=1;i<=100;++i){
#if defined(_MSC_VER)
#if (_MSC_VER >= 1400) // VC++ 8.0 or higher
sprintf_s(tmp,sizeof(tmp),"Name%d",i);
#else
sprintf(tmp,"Name%d",i);
#endif
#else
sprintf(tmp,"Name%d",i);
#endif
o<<i<<tmp;
}

}

void select()
{
otl_stream i(50, // buffer size
"begin "
" :cur := my_func1(:f1<int,in>); "
"end;", // PL/SQL block returns a referenced cursor
db, // connect object
":cur" // referenced cursor placeholder name
);
// create select stream with referenced cursor


int 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

while(!i.eof()){ // while not end-of-data
i>>f1>>f2;
cout<<"f1="<<f1<<", f2="<<f2<<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

db<<
"CREATE OR REPLACE PACKAGE my_pkg1 IS "
" TYPE my_cursor IS REF CURSOR; "
"end; ";

db<<
"create or replace function my_func1 "
" (in_f1 in number) "
"return my_pkg1.my_cursor "
"is "
" lv_cur my_pkg1.my_cursor; "
"begin "
" open lv_cur for "
" select * from test_tab "
" where f1 between in_f1 and in_f1*2; "
" return lv_cur; "
"end; ";

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

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





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

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