adding column to all tables in a mysql database (unknown table names)

Question

I need to add a primary key to a set of tables in a given database. I do not know how many tables there will be or what their specific names are. They will all be of the for dat

Answer 1

   getAll($sql, $params);
                $this->_check_error($rows);
                if(count($rows)>0){
                    $this->_row_count=count($rows);
                    }

                else
                    $this->_row_count=0;
                return $rows;
              } 

              //====== fetch  rows  from db and return array of row object
              function getAll($sqlQuery='',$params= array())
              {     
                 $msg="";
                  $this->_sqlQuery="";
                  $sQuery=$this->MakeSQLQuery($sqlQuery,$params);
                  $this->_sqlQuery=$sQuery;
                  $res=mysql_query($sQuery) or die(mysql_error());
                  $results = array();
                  if(mysql_num_rows($res)>0){
                  while ($row = mysql_fetch_object($res)) {
                          $results[] = $row;
                  }
                  }
                  return $results;

              }  

               function MakeSQLQuery($str='',$params= array())
              {
                  foreach($params as $k=>$v){
                   $params[$k]=$this->_quote($params[$k]);
                  }
                  $str=$this->replace_different("?",$params,$str);
                  return $str;
              }

              function replace_different($search,$replace,$string) {
               $occs = substr_count($string,$search);
               $last = 0;
               $cur = 0;
               $data = '';
               for ($i=0;$i<$occs;$i++) {
                 $find = strpos($string,$search,$last);
                 $data .= substr($string,$last,$find-$last).$replace[$cur];
                 $last = $find+strlen($search);
                 if (++$cur == count($replace)) {
                   $cur = 0;
                 }
               }
               return $data.substr($string,$last);
             }

             // check for a database error
              function _check_error($obj, $msg = 'Database Error')
              {

                if (!$this->isError($obj)) 
                  {
                    $this->raise_error($msg . ': ' .$obj->getMessage(). mysql_error());
                  }
                  return ;
              }

              function isError($value)
                {
                    if(isset($value))
                        return true;
                    else
                        return false;
                }

            }
            // main operation from here 
            //====define object of class========
            $tbl_col = new Model;
            $sqlquery_col="SELECT table_name FROM information_schema.tables where table_schema='".$sLocalDatabaseName."'";
            $res_tab_col=$tbl_col->find_query_all($sqlquery_col);
            foreach($res_tab_col as $r=>$v){
                $res=mysql_query("SELECT COLUMN_NAME FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = '".$sLocalDatabaseName."' AND TABLE_NAME ='".$v->table_name."' and COLUMN_NAME!='".$Add_columnname."' ORDER BY ORDINAL_POSITION DESC LIMIT 1");
              if(mysql_num_rows($res)>0){
                 while ($row = mysql_fetch_object($res)) {
                    $last_column= $row->COLUMN_NAME;
                    $alter_query="ALTER TABLE `".$v->table_name."`  ADD `".$Add_columnname."` INT NOT NULL DEFAULT '1' AFTER `".$last_column."` ";
                    mysql_query($alter_query);
                }
              }
            }
    ?>