OTL 4.0, Example 287
(otl_stream::describe_select() with extended otl_column_desc fields)

Example 287 (otl_stream::describe_select() with extended otl_column_desc fields)

This example demonstrates the otl_stream::describe_select() with extended fields in otl_column_desc.

Source Code

#include <iostream>
using namespace std;

#include <stdio.h>
#define OTL_ORA9I // Compile OTL 4.0/OCI9i
//#define OTL_ORA10G // Compile OTL 4.0/OCI10g
#define OTL_UNICODE // Enable Unicode support
#include <otlv4.h> // include the OTL 4.0 header file

otl_connect db; // connect object

void select()
{
otl_stream i(1, // buffer size
"select * from test_tab",
// SELECT statement
db // connect object
);
// create select stream

otl_column_desc* desc;
int desc_len;

desc=i.describe_select(desc_len);

for(int n=0;n<desc_len;++n){
cout<<"========== COLUMN #"<<n+1<<" ==========="<<endl;
cout<<"name="<<desc[n].name<<endl;
cout<<"dbtype="<<desc[n].dbtype<<endl;
cout<<"otl_var_dbtype="<<desc[n].otl_var_dbtype<<endl;
cout<<"dbsize="<<desc[n].dbsize<<endl;
cout<<"scale="<<desc[n].scale<<endl;
cout<<"prec="<<desc[n].prec<<endl;
cout<<"nullok="<<desc[n].nullok<<endl;
cout<<"charset_form="<<desc[n].charset_form<<endl;
cout<<"char_size="<<desc[n].char_size<<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(100), f3 nvarchar2(100), "
"f4 char(100), f5 nchar(100), "
"f6 clob, f7 nclob)"
); // create 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

========== COLUMN #1 ===========
name=F1
dbtype=2
otl_var_dbtype=2
dbsize=22
scale=129
prec=0
nullok=1
charset_form=0
char_size=0
========== COLUMN #2 ===========
name=F2
dbtype=1
otl_var_dbtype=1
dbsize=100
scale=0
prec=0
nullok=1
charset_form=1
char_size=100
========== COLUMN #3 ===========
name=F3
dbtype=1
otl_var_dbtype=1
dbsize=200
scale=0
prec=0
nullok=1
charset_form=2
char_size=100
========== COLUMN #4 ===========
name=F4
dbtype=96
otl_var_dbtype=1
dbsize=100
scale=0
prec=0
nullok=1
charset_form=1
char_size=100
========== COLUMN #5 ===========
name=F5
dbtype=96
otl_var_dbtype=1
dbsize=200
scale=0
prec=0
nullok=1
charset_form=2
char_size=100
========== COLUMN #6 ===========
name=F6
dbtype=112
otl_var_dbtype=11
dbsize=4000
scale=0
prec=0
nullok=1
charset_form=1
char_size=0
========== COLUMN #7 ===========
name=F7
dbtype=112
otl_var_dbtype=11
dbsize=4000
scale=0
prec=0
nullok=1
charset_form=2
char_size=0


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