This example demonstrates how to use OTL STL vector based PL/SQL table containers for reading/writing PL/SQL tables from/to the otl_stream. Vector based containers have the advantage of being fully dynamic containers without any initial size.
#define OTL_ORA8 // Compile OTL 4.0/OCI8 #define OTL_STL // Turn on STL #include <otlv4.h> // include the OTL 4.0 header file #include <cstdio> #include <string> #include <iostream> using namespace std; otl_connect db; // connect object
void plsql(void)
{
otl_stream s(1, // buffer size needs to be set to 1 in this case
"begin "
" pkg_test.prc_test(:t1<int,inout[100]>,:t2<char[32],out[200]>); "
"end;",
db // connect object
);
s.set_commit(0); // Since there is no transactions, unset the stream auto-commit
otl_int_vec t1; // PL/SQL table of int in the format of vector<int>
otl_string_vec t2; // PL/SQL table of std::string in the vector format
t1.set_len(3); // set t1's length to 3. It is important to call
// this function BEFORE assigning values
// to the vector/PLSQL table
t1.v[0]=1; // assign 1 to t1[0] t1.set_non_null(0); // specify that the value is not null t1.v[1]=2; // assign 2 to t1[1] t1.set_non_null(1); // specify that the value is not null t1.set_null(2); // set t1[2]=NULL s<<t1; // write t1 into the stream, since it is input s>>t1; // read t1 from the stream since it is input/output s>>t2; // read t2 from the stream since it is output.
cout<<"T1_Len="<<t1.len()<<endl;
for(int i=0;i<t1.len();++i)
if(t1.is_null(i))
cout<<"T1["<<i<<"]=NULL"<<endl;
else
cout<<"T1["<<i<<"]="<<t1.v[i]<<endl;
cout<<endl<<endl<<"T2_Len="<<t2.len()<<endl;
for(int j=0;j<t2.len();++j)
if(t2.is_null(j))
cout<<"T2["<<j<<"]=NULL"<<endl;
else
cout<<"T2["<<j<<"]="<<t2.v[j]<<endl;
}
int main()
{
otl_connect::otl_initialize(); // initialize OCI environment
try{
db.rlogon("scott/tiger"); // connect to Oracle
otl_cursor::direct_exec
(db,
"CREATE OR REPLACE PACKAGE pkg_test IS "
" TYPE my_numeric_table IS TABLE OF NUMBER INDEX BY BINARY_INTEGER; "
" TYPE my_varchar_table IS TABLE OF VARCHAR2(31) INDEX BY BINARY_INTEGER; "
" "
" PROCEDURE prc_test(v1 IN OUT my_numeric_table, v2 OUT my_varchar_table); "
" "
"END; "
);
otl_cursor::direct_exec
(db,
"CREATE OR REPLACE PACKAGE BODY pkg_test IS "
" "
" PROCEDURE prc_test(v1 IN OUT my_numeric_table, v2 OUT my_varchar_table) "
" IS "
" BEGIN "
" FOR i IN 1..v1.last LOOP "
" v1(i) := v1(i)+100; "
" END LOOP; "
" v1(v1.last+1) := 0; "
" v2(1) := 'Hello'; "
" v2(2) := 'World'; "
" v2(3) := '!!!'; "
" END; "
" "
"END; "
);
plsql();
}
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;
}
T1_Len=4 T1[0]=101 T1[1]=102 T1[2]=NULL T1[3]=0 T2_Len=3 T2[0]=Hello T2[1]=World T2[2]=!!!
Copyright © 1996-2024, Sergei Kuchin, email: skuchin@gmail.com, skuchin@gmail.com .
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