Chapter 7. Delete a row

Also not a great task. Goto the row you wish to delete and call hk_datasource::delete_actualrow()


Example 7-1. Delete a row

   1 #include <hk_classes.h>
   2 #include <iostream>
   3 int main()
   4 {
   5    hk_drivermanager* mydrivermanager = new hk_drivermanager();
   6    if (mydrivermanager==NULL) {cout <<"error creating mydrivermanager"<<endl;exit(1);}
   7    hk_connection* myconnection = mydrivermanager->new_connection("mysql");
   8    if (myconnection==NULL) {cout <<"error creating myconnection"<<endl;exit(1);}
   9    myconnection->set_host("localhost");
  10    myconnection->set_user("root");
  11    myconnection->set_password("mypasswd");
  12    myconnection->connect();
  13 
  14    hk_database* mydatabase=myconnection->new_database("exampledb");
  15    if (mydatabase==NULL) {cout <<"error creating mydatabase"<<endl;exit(1);}
  16    hk_datasource* mydatasource= mydatabase->new_table("authors");
  17    if (mydatasource==NULL) {cout <<"error creating mydatasource"<<endl;exit(1);}
  18    mydatasource->enable();
  19 
  20    hk_column* mycolumn = mydatasource->column_by_name("name");
  21    if (mycolumn==NULL) {cout <<"error getting column"<<endl;exit(1);}
  22 
  23    mydatasource->goto_row(3);
  24    mydatasource->delete_actualrow();
  25 
  26 
  27    delete mydrivermanager;
  28 }

When you try this out you will be asked if you really want to delete the data. If this question is disturbing you switch it off. Use the function hk_class::set_showpedantic(false); for this.