OTL 4.0, Example 659 (XMLType as CLOB/otl_long_string on SELECT, and as char[XXX] on INSERT)

This example demonstrates simple INSERT and SELECT statements with the XMLType datatype as well as constant SQL statements. XMLType columns can be bound with char[XXX] (XXX<=4001) variables on INSERT/UPDATE/DELETE. On SELECT, XMLType needs to be converted into CLOB.

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_ORA10G_R2 // Compile OTL 4.0/OCI10gR2
//#define OTL_ORA11G // Compile OTL 4.0/OCI11G
#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[4001]>) ",
                 // SQL statement
              db // connect object
             );
 char tmp[4001];

 for(int i=1;i<=20;++i){
  sprintf(tmp,"<TAG>MyXML%d</TAG>",i);
  o<<i<<tmp;
 }

}

void select()
{ 
 otl_long_string f2(4001); // define long string variable
 db.set_max_long_size(4001); // set maximum long string size for connect object

 otl_stream i(10, // buffer size. To read XML as CLOBs, it can be set to a size greater than 1
              "select f1, to_clob(f2) "
              "from test_tab "
              "where f1>=:f11<int> "
              " and f1<=:f12<int>*2",
                 // SELECT statement
              db // connect object
             ); 
   // create select stream
 
 int f1;

 i<<8<<8; // assigning :f11 = 8, :f12 = 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="<<(char*)&f2[0]<<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 xmltype)"
    );  // 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

f1=8, f2=<TAG>MyXML8</TAG>
f1=9, f2=<TAG>MyXML9</TAG>
f1=10, f2=<TAG>MyXML10</TAG>
f1=11, f2=<TAG>MyXML11</TAG>
f1=12, f2=<TAG>MyXML12</TAG>
f1=13, f2=<TAG>MyXML13</TAG>
f1=14, f2=<TAG>MyXML14</TAG>
f1=15, f2=<TAG>MyXML15</TAG>
f1=16, f2=<TAG>MyXML16</TAG>

Examples Contents Go Home

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.