js/pmd/history.js

   1 /* vim: set expandtab sw=4 ts=4 sts=4: */
   2 /**
   3  * @fileoverview    function used in this file builds history tab and generates query.
   4   *
   5   * @requires    jQuery
   6   * @requires    moves.js
   7   * @version $Id$
   8   */
   9
  10 var history_array = []; // Global array to store history objects
  11 var select_field = [];  // Global array to store informaation for columns which are used in select clause
  12 var g_index;
  13
  14 /**
  15  * function for panel, hides and shows toggle_container <div>,which is for history elements uses {@link JQuery}.
  16  *
  17  * @param index has value 1 or 0,decides wheter to hide toggle_container on load.
  18 **/
  19
  20 function panel(index)
  21 {
  22     if (!index) {
  23         $(".toggle_container").hide();
  24     }
  25     $("h2.tiger").click(function(){
  26     $(this).toggleClass("active").next().slideToggle("slow");
  27     });
  28 }
  29
  30 /**
  31  * Sorts history_array[] first,using table name as the key and then generates the HTML code for history tab,
  32  * clubbing all objects of same tables together
  33  * This function is called whenever changes are made in history_array[]
  34  *
  35  * @uses and_or()
  36  * @uses history_edit()
  37  * @uses history_delete()
  38  *
  39  * @param {int}  init starting index of unsorted array
  40  * @param {int} finit   last index of unsorted array
  41  *
  42 **/
  43
  44 function display(init,finit)
  45 {
  46     var str,i,j,k,sto;
  47     // this part sorts the history array based on table name,this is needed for clubbing all object of same name together.
  48     for (i = init;i < finit;i++) {
  49         sto = history_array[i];
  50         var temp = history_array[i].get_tab() ;//+ '.' + history_array[i].get_obj_no(); for Self JOINS
  51         for(j = 0;j < i;j++){
  52             if(temp > (history_array[j].get_tab())) {//+ '.' + history_array[j].get_obj_no())) { //for Self JOINS
  53                 for(k = i;k > j;k--) {
  54                     history_array[k] = history_array[k-1];
  55                 }
  56                 history_array[j] = sto;
  57                 break;
  58             }
  59         }
  60     }
  61     // this part generates HTML code for history tab.adds delete,edit,and/or and detail features with objects.
  62     str =''; // string to store Html code for history tab
  63     for ( var i=0; i < history_array.length; i++){
  64         var temp = history_array[i].get_tab(); //+ '.' + history_array[i].get_obj_no(); for Self JOIN
  65         str += '<h2 class="tiger"><a href="#">' + temp + '</a></h2>';
  66         str += '<div class="toggle_container">\n';
  67         while((history_array[i].get_tab()) == temp) { //+ '.' + history_array[i].get_obj_no()) == temp) {
  68             str +='<div class="block"> <table width ="250">';
  69             str += '<thead><tr><td>';
  70             if(history_array[i].get_and_or()){
  71                 str +='<img src="pmd/images/or_icon.png" onclick="and_or('+i+')" title="OR"/></td>';
  72             }
  73             else {
  74                str +='<img src="pmd/images/and_icon.png" onclick="and_or('+i+')" title="AND"/></td>';
  75             }
  76             str +='<td style="padding-left: 5px;" align="right"><img class="icon ic_b_sbrowse" src="themes/dot.gif" title="column name"/></td><td width="175" style="padding-left: 5px">' + history_array[i].get_column_name();
  77             if (history_array[i].get_type() == "GroupBy" || history_array[i].get_type() == "OrderBy") {
  78                 str += '</td><td align="center"><img class="icon ic_b_info" src="themes/dot.gif" title="'+detail(i)+'"/><td title="' + detail(i) +'">' + history_array[i].get_type() + '</td></td><td onmouseover="this.className=\'history_table\';" onmouseout="this.className=\'history_table2\'" onclick=history_delete('+ i +')><img class="icon ic_b_drop" src="themes/dot.gif" title="Delete"></td></tr></thead>';
  79            }
  80            else {
  81                str += '</td><td align="center"><img class="icon ic_b_info" src="themes/dot.gif" title="'+detail(i)+'"/></td><td title="' + detail(i) +'">' + history_array[i].               get_type() + '</td><td <td onmouseover="this.className=\'history_table\';" onmouseout="this.className=\'history_table2\'" onclick=history_edit('+ i +')><img class="icon ic_b_edit" src="themes/dot.gif" title="Edit"/></td><td onmouseover="this.className=\'history_table\';" onmouseout="this.className=\'history_table2\'"               onclick=history_delete('+ i +')><img src="themes/original/img/b_drop.png" title="Delete"></td></tr></thead>';
  82            }
  83            i++;
  84            if(i >= history_array.length) {
  85                break;
  86            }
  87            str += '</table></div><br/>';
  88         }
  89         i--;
  90         str += '</div><br/>';
  91     }
  92     return str;
  93 }
  94
  95 /**
  96  * To change And/Or relation in history tab
  97  *
  98  * @uses panel()
  99  *
 100  * @param {int} index of history_array where change is to be made
 101  *
 102 **/
 103
 104 function and_or(index)
 105 {
 106     if (history_array[index].get_and_or()) {
 107         history_array[index].set_and_or(0);
 108     }
 109     else {
 110         history_array[index].set_and_or(1);
 111     }
 112     var existingDiv = document.getElementById('ab');
 113     existingDiv.innerHTML = display(0,0);
 114     panel(1);
 115 }
 116
 117 /**
 118  * To display details of obects(where,rename,Having,aggregate,groupby,orderby,having)
 119  *
 120  * @param index index of history_array where change is to be made
 121  *
 122 **/
 123
 124 function detail (index)
 125 {
 126     var type = history_array[index].get_type();
 127     var str;
 128     if (type == "Where") {
 129         str = 'Where ' + history_array[index].get_column_name() + history_array[index].get_obj().getrelation_operator() + history_array[index].get_obj().getquery();
 130     }
 131     if (type == "Rename") {
 132         str = 'Rename ' + history_array[index].get_column_name() + ' To ' + history_array[index].get_obj().getrename_to();
 133     }
 134     if (type == "Aggregate") {
 135         str = 'Select ' + history_array[index].get_obj().get_operator() + '( ' + history_array[index].get_column_name() + ' )';
 136     }
 137     if (type == "GroupBy") {
 138         str = 'GroupBy ' + history_array[index].get_column_name() ;
 139     }
 140     if (type == "OrderBy") {
 141         str = 'OrderBy ' + history_array[index].get_column_name() ;
 142     }
 143     if (type == "Having") {
 144         str = 'Having ';
 145         if (history_array[index].get_obj().get_operator() != 'None') {
 146             str += history_array[index].get_obj().get_operator() + '( ' + history_array[index].get_column_name() + ' )';
 147             str += history_array[index].get_obj().getrelation_operator() + history_array[index].get_obj().getquery();
 148         }
 149         else {
 150             str = 'Having ' + history_array[index].get_column_name() + history_array[index].get_obj().getrelation_operator() + history_array[index].get_obj().getquery();
 151         }
 152     }
 153     return str;
 154 }
 155
 156 /**
 157  * Deletes entry in history_array
 158  *
 159  * @uses panel()
 160  * @uses display()
 161  * @param index index of history_array[] which is to be deleted
 162  *
 163 **/
 164
 165 function history_delete(index)
 166 {
 167     for(var k =0 ;k < from_array.length;k++){
 168         if(from_array[k] == history_array[index].get_tab()){
 169             from_array.splice(k,1);
 170             break;
 171         }
 172     }
 173     history_array.splice(index,1);
 174     var existingDiv = document.getElementById('ab');
 175     existingDiv.innerHTML = display(0,0);
 176     panel(1);
 177 }
 178
 179 /**
 180  * To show where,rename,aggregate,having forms to edit a object
 181  *
 182  * @param{int} index index of history_array where change is to be made
 183  *
 184 **/
 185
 186 function history_edit(index)
 187 {
 188     g_index = index;
 189     var type = history_array[index].get_type();
 190     if (type == "Where") {
 191         document.getElementById('eQuery').value = history_array[index].get_obj().getquery();
 192         document.getElementById('erel_opt').value = history_array[index].get_obj().getrelation_operator();
 193         document.getElementById('query_where').style.left =  '530px';
 194         document.getElementById('query_where').style.top  = '130px';
 195         document.getElementById('query_where').style.position  = 'absolute';
 196         document.getElementById('query_where').style.zIndex = '9';
 197         document.getElementById('query_where').style.visibility = 'visible';
 198     }
 199     if (type == "Having") {
 200         document.getElementById('hQuery').value = history_array[index].get_obj().getquery();
 201         document.getElementById('hrel_opt').value = history_array[index].get_obj().getrelation_operator();
 202         document.getElementById('hoperator').value = history_array[index].get_obj().get_operator();
 203         document.getElementById('query_having').style.left =  '530px';
 204         document.getElementById('query_having').style.top  = '130px';
 205         document.getElementById('query_having').style.position  = 'absolute';
 206         document.getElementById('query_having').style.zIndex = '9';
 207         document.getElementById('query_having').style.visibility = 'visible';
 208     }
 209     if (type == "Rename") {
 210         document.getElementById('query_rename_to').style.left =  '530px';
 211         document.getElementById('query_rename_to').style.top  = '130px';
 212         document.getElementById('query_rename_to').style.position  = 'absolute';
 213         document.getElementById('query_rename_to').style.zIndex = '9';
 214         document.getElementById('query_rename_to').style.visibility = 'visible';
 215     }
 216     if (type == "Aggregate") {
 217         document.getElementById('query_Aggregate').style.left = '530px';
 218         document.getElementById('query_Aggregate').style.top  = '130px';
 219         document.getElementById('query_Aggregate').style.position  = 'absolute';
 220         document.getElementById('query_Aggregate').style.zIndex = '9';
 221         document.getElementById('query_Aggregate').style.visibility = 'visible';
 222     }
 223 }
 224
 225 /**
 226  * Make changes in history_array when Edit button is clicked
 227  * checks for the type of object and then sets the new value
 228  * @uses panel()
 229  * @uses display()
 230  *
 231  * @param index index of history_array where change is to be made
 232 **/
 233
 234 function edit(type)
 235 {
 236     if (type == "Rename") {
 237         if (document.getElementById('e_rename').value != "") {
 238             history_array[g_index].get_obj().setrename_to(document.getElementById('e_rename').value);
 239             document.getElementById('e_rename').value = "";
 240         }
 241         document.getElementById('query_rename_to').style.visibility = 'hidden';
 242     }
 243     if (type == "Aggregate") {
 244         if (document.getElementById('e_operator').value != '---') {
 245             history_array[g_index].get_obj().set_operator(document.getElementById('e_operator').value);
 246             document.getElementById('e_operator').value = '---';
 247         }
 248         document.getElementById('query_Aggregate').style.visibility = 'hidden';
 249     }
 250     if (type == "Where") {
 251         if (document.getElementById('erel_opt').value != '--' && document.getElementById('eQuery').value !="") {
 252         history_array[g_index].get_obj().setquery(document.getElementById('eQuery').value);
 253         history_array[g_index].get_obj().setrelation_operator(document.getElementById('erel_opt').value);
 254         }
 255         document.getElementById('query_where').style.visibility = 'hidden';
 256     }
 257     if (type == "Having") {
 258         if (document.getElementById('hrel_opt').value != '--' && document.getElementById('hQuery').value !="") {
 259             history_array[g_index].get_obj().setquery(document.getElementById('hQuery').value);
 260             history_array[g_index].get_obj().setrelation_operator(document.getElementById('hrel_opt').value);
 261             history_array[g_index].get_obj().set_operator(document.getElementById('hoperator').value);
 262         }
 263         document.getElementById('query_having').style.visibility = 'hidden';
 264     }
 265     var existingDiv = document.getElementById('ab');
 266     existingDiv.innerHTML = display(0,0);
 267     panel(1);
 268 }
 269
 270 /**
 271  * history object closure
 272  *
 273  * @param ncolumn_name  name of the column on which conditions are put
 274  * @param nobj          object details(where,rename,orderby,groupby,aggregate)
 275  * @param ntab          table name of the column on which conditions are applied
 276  * @param nobj_no       object no used for inner join
 277  * @param ntype         type of object
 278  *
 279 **/
 280
 281 function history(ncolumn_name,nobj,ntab,nobj_no,ntype)
 282 {
 283     var and_or;
 284     var obj;
 285     var tab;
 286     var column_name;
 287     var obj_no;
 288     var type;
 289     this.set_column_name = function (ncolumn_name) {
 290         column_name = ncolumn_name;
 291     };
 292     this.get_column_name = function() {
 293         return column_name;
 294     };
 295     this.set_and_or = function(nand_or) {
 296         and_or = nand_or;
 297     };
 298     this.get_and_or = function() {
 299         return and_or;
 300     }
 301     this.get_relation = function() {
 302         return and_or;
 303     };
 304     this.set_obj = function(nobj) {
 305         obj = nobj;
 306     };
 307     this.get_obj = function() {
 308         return obj;
 309     };
 310     this.set_tab = function(ntab) {
 311         tab = ntab;
 312     };
 313     this.get_tab = function() {
 314         return tab;
 315     };
 316     this.set_obj_no = function(nobj_no) {
 317         obj_no = nobj_no;
 318      };
 319     this.get_obj_no = function() {
 320         return obj_no;
 321     };
 322     this.set_type = function(ntype) {
 323         type = ntype;
 324     }
 325     this.get_type = function() {
 326         return type;
 327     }
 328     this.set_obj_no(nobj_no);
 329     this.set_tab(ntab);
 330     this.set_and_or(0);
 331     this.set_obj(nobj);
 332     this.set_column_name(ncolumn_name);
 333     this.set_type(ntype);
 334 };
 335
 336 /**
 337  * where object closure, makes an object with all information of where
 338  *
 339  * @param nrelation_operator type of relation operator to be applied
 340  * @param nquery             stores value of value/sub-query
 341  *
 342 **/
 343
 344
 345 var where = function (nrelation_operator,nquery) {
 346     var relation_operator;
 347     var query;
 348     this.setrelation_operator = function(nrelation_operator) {
 349         relation_operator = nrelation_operator;
 350     };
 351     this.setquery = function(nquery) {
 352         query = nquery;
 353     };
 354     this.getquery = function() {
 355         return query;
 356     };
 357     this.getrelation_operator = function() {
 358         return relation_operator;
 359     };
 360     this.setquery(nquery);
 361     this.setrelation_operator(nrelation_operator);
 362 };
 363
 364
 365 /**
 366  * Having object closure, makes an object with all information of where
 367  *
 368  * @param nrelation_operator type of relation operator to be applied
 369  * @param nquery             stores value of value/sub-query
 370  *
 371 **/
 372
 373 var having = function (nrelation_operator,nquery,noperator) {
 374     var relation_operator;
 375     var query;
 376     var operator;
 377     this.set_operator = function(noperator) {
 378         operator = noperator;
 379     };
 380     this.setrelation_operator = function(nrelation_operator) {
 381         relation_operator = nrelation_operator;
 382     };
 383     this.setquery = function(nquery) {
 384         query = nquery;
 385     };
 386     this.getquery = function() {
 387         return query;
 388     };
 389     this.getrelation_operator = function() {
 390         return relation_operator;
 391     };
 392     this.get_operator = function() {
 393         return operator;
 394     };
 395     this.setquery(nquery);
 396     this.setrelation_operator(nrelation_operator);
 397     this.set_operator(noperator);
 398 };
 399
 400 /**
 401  * rename object closure,makes an object with all information of rename
 402  *
 403  * @param nrename_to new name information
 404  *
 405 **/
 406
 407 var rename = function(nrename_to) {
 408     var rename_to;
 409     this.setrename_to = function(nrename_to) {
 410         rename_to = nrename_to;
 411     };
 412     this.getrename_to =function() {
 413         return rename_to;
 414     };
 415     this.setrename_to(nrename_to);
 416 };
 417
 418 /**
 419  * aggregate object closure
 420  *
 421  * @param noperator aggregte operator
 422  *
 423 **/
 424
 425 var aggregate = function(noperator) {
 426     var operator;
 427     this.set_operator = function(noperator) {
 428         operator = noperator;
 429     };
 430     this.get_operator = function() {
 431         return operator;
 432     };
 433     this.set_operator(noperator);
 434 };
 435
 436 /**
 437  * This function returns unique element from an array
 438  *
 439  * @param arraName array from which duplicate elem are to be removed.
 440  * @return unique array
 441  */
 442
 443 function unique(arrayName)
 444 {
 445     var newArray=new Array();
 446     label:for(var i=0; i<arrayName.length;i++ )
 447     {
 448         for(var j=0; j<newArray.length;j++ )
 449         {
 450             if(newArray[j]==arrayName[i])
 451                 continue label;
 452         }
 453         newArray[newArray.length] = arrayName[i];
 454     }
 455    return newArray;
 456 }
 457
 458 /**
 459  * This function takes in array and a value as input and returns 1 if values is present in array
 460  * else returns -1
 461  *
 462  * @param arrayName array
 463  * @param value  value which is to be searched in the array
 464  */
 465
 466 function found(arrayName,value)
 467 {
 468     for(var i=0; i<arrayName.length; i++) {
 469         if(arrayName[i] == value) { return 1;}
 470     }
 471     return -1;
 472 }
 473
 474 /**
 475  * This function is the main function for query building.
 476  * uses history object details for this.
 477  *
 478  * @ uses query_where()
 479  * @ uses query_groupby()
 480  * @ uses query_having()
 481  * @ uses query_orderby()
 482  *
 483  * @param formtitle title for the form
 484  * @param fadin
 485  */
 486
 487 function build_query(formtitle, fadin)
 488 {
 489     var q_select = "SELECT ";
 490     var temp;
 491     for (i = 0;i < select_field.length; i++) {
 492         temp = check_aggregate(select_field[i]);
 493         if (temp != "") {
 494             q_select += temp;
 495             temp = check_rename(select_field[i]);
 496             q_select += temp + ",";
 497         }
 498         else {
 499             temp = check_rename(select_field[i]);
 500             q_select += select_field[i] + temp +",";
 501         }
 502     }
 503     q_select = q_select.substring(0,q_select.length - 1);
 504     q_select += " FROM " + query_from();
 505     if(query_where() != "") {
 506         q_select +="\n WHERE";
 507         q_select += query_where();
 508     }
 509     if(query_groupby() != "") { q_select += "\nGROUP BY " + query_groupby(); }
 510     if(query_having() != "") { q_select += "\nHAVING " + query_having(); }
 511     if(query_orderby() != "") { q_select += "\nORDER BY " + query_orderby(); }
 512     var box = document.getElementById('box');
 513     document.getElementById('filter').style.display='block';
 514     var btitle = document.getElementById('boxtitle');
 515     btitle.innerHTML = 'SELECT';//formtitle;
 516     if(fadin){
 517         gradient("box", 0);
 518         fadein("box");
 519     }
 520     else{
 521         box.style.display='block';
 522     }
 523     document.getElementById('textSqlquery').innerHTML = q_select;
 524 }
 525  /**
 526   * This function builds from clause of query
 527   * makes automatic joins.
 528   *
 529   * @uses unique
 530   * @uses add_array
 531   * @uses remove_array
 532   *
 533   */
 534
 535
 536 function query_from()
 537 {
 538     var i;
 539     var tab_left = [];
 540     var tab_used = [];
 541     var t_tab_used = [];
 542     var t_tab_left = [];
 543     var temp;
 544     var query = "";
 545     var quer = "";
 546     var parts = [];
 547     var t_array = [];
 548     t_array = from_array;
 549     var K = 0;
 550     for (i = 0; i < history_array.length ; i++) {
 551         from_array.push(history_array[i].get_tab());
 552     }
 553     from_array = unique( from_array );
 554     tab_left = from_array;
 555     temp = tab_left.shift();
 556     quer = temp;
 557     tab_used.push(temp);
 558     // if master table (key2) matches with tab used get all keys and check if tab_left matches
 559     //after this check if master table (key2) matches with tab left then check if any foriegn matches with master .
 560     for( i =0; i<2 ; i++) {
 561         for (K in contr){
 562             for (key in contr[K]){// contr name
 563                  for (key2 in contr[K][key]){// table name
 564                     parts = key2.split(".");
 565                     if(found(tab_used,parts[1]) > 0)  {
 566                         for (key3 in contr[K][key][key2]) {
 567                             parts1 = contr[K][key][key2][key3][0].split(".");
 568                             if(found(tab_left,parts1[1]) > 0) {
 569                                 query += "\n" + 'LEFT JOIN ';
 570                                 query += '`' + parts1[0] + '`.`' + parts1[1] + '` ON ' ;
 571                                 query += '`' + parts[1] +'`.`' + key3 + '` = ';
 572                                 query += '`' + parts1[1] + '`.`' + contr[K][key][key2][key3][1] + '` ';
 573                                 t_tab_left.push(parts1[1]);
 574                             }
 575                         }
 576                     }
 577                 }
 578             }
 579         }
 580         K = 0;
 581         t_tab_left = unique (t_tab_left);
 582         tab_used = add_array(t_tab_left,tab_used);
 583         tab_left = remove_array(t_tab_left,tab_left);
 584         t_tab_left = [];
 585         for (K in contr) {
 586              for (key in contr[K]) {
 587                  for (key2 in contr[K][key]){// table name
 588                      parts = key2.split(".");
 589                          if(found(tab_left,parts[1]) > 0){
 590                            for (key3 in contr[K][key][key2]){
 591                                parts1 = contr[K][key][key2][key3][0].split(".");
 592                                if(found(tab_used,parts1[1]) > 0) {
 593                                    query += "\n" + 'LEFT JOIN ';
 594                                    query += '`' + parts[0] + '`.`' + parts[1] + '` ON ' ;
 595                                    query += '`' + parts1[1] + '`.`' + contr[K][key][key2][key3][1] + '` = ';
 596                                    query += '`' + parts[1] + '`.`' + key3 + '` ';
 597                                    t_tab_left.push(parts[1]);
 598                                }
 599                            }
 600                      }
 601                  }
 602             }
 603         }
 604         t_tab_left = unique (t_tab_left);
 605         tab_used = add_array(t_tab_left,tab_used);
 606         tab_left = remove_array(t_tab_left,tab_left);
 607         t_tab_left = [];
 608     }
 609     for (k in tab_left) {
 610         quer += " , `" + tab_left[k] + "`";
 611     }
 612         query = quer + query;
 613         from_array = t_array;
 614         return query;
 615 }
 616
 617 /**
 618  * This function concatenates two array
 619  *
 620  * @params add array elements of which are pushed in
 621  * @params arr array in which elemnets are added
 622  */
 623 function add_array(add,arr)
 624 {
 625     for( var i=0; i<add.length; i++){
 626         arr.push(add[i]);
 627     }
 628     return arr;
 629 }
 630
 631 /* This fucntion removes all elements present in one array from the other.
 632  *
 633  * @params rem array from which each element is removed from other array.
 634  * @params arr array from which elements are removed.
 635  *
 636  */
 637 function remove_array(rem,arr)
 638 {
 639     for(var i=0; i<rem.length; i++){
 640         for(var j=0; j<arr.length; j++)
 641             if(rem[i] == arr[j]) { arr.splice(j,1); }
 642     }
 643     return arr;
 644 }
 645
 646 /**
 647  * This function builds the groupby clause from history object
 648  *
 649  */
 650
 651 function query_groupby()
 652 {
 653     var i;
 654     var str = "";
 655     for (i = 0; i < history_array.length;i++) {
 656         if(history_array[i].get_type() == "GroupBy") { str +=history_array[i].get_column_name() + ", ";}
 657     }
 658     str = str.substr(0,str.length -1);
 659     return str;
 660 }
 661
 662 /**
 663  * This function builds the Having clause from the history object.
 664  *
 665  */
 666
 667 function query_having()
 668 {
 669     var i;
 670     var and = "(";
 671     for (i = 0; i < history_array.length;i++) {
 672         if(history_array[i].get_type() == "Having") {
 673             if (history_array[i].get_obj().get_operator() != 'None') {
 674                 and += history_array[i].get_obj().get_operator() + "(" + history_array[i].get_column_name() + " ) " + history_array[i].get_obj().getrelation_operator();
 675                 and += " " + history_array[i].get_obj().getquery() + ", " ;
 676             }
 677             else {
 678                 and +=  history_array[i].get_column_name() + " " + history_array[i].get_obj().getrelation_operator() + " " + history_array[i].get_obj().getquery() + ", ";
 679             }
 680         }
 681     }
 682     if (and =="(") { and = "" ;}
 683     else { and = and.substr(0,and.length -2) + ")";}
 684     return and;
 685 }
 686
 687
 688 /**
 689  * This function builds the orderby clause from the history object.
 690  *
 691  */
 692
 693 function query_orderby()
 694 {
 695     var i;
 696     var str = "" ;
 697     for (i = 0; i < history_array.length;i++) {
 698         if(history_array[i].get_type() == "OrderBy") { str += history_array[i].get_column_name() + " , "; }
 699     }
 700     str = str.substr(0,str.length -1);
 701     return str;
 702 }
 703
 704
 705 /**
 706  * This function builds the Where clause from the history object.
 707  *
 708  */
 709
 710 function query_where()
 711 {
 712     var i;
 713     var and = "(";
 714     var or = "(";
 715     for (i = 0; i < history_array.length;i++) {
 716         if(history_array[i].get_type() == "Where") {
 717             if(history_array[i].get_and_or() == 0) {
 718                 and += "( " + history_array[i].get_column_name() + " " + history_array[i].get_obj().getrelation_operator() +" " + history_array[i].get_obj().getquery() + ")";                and += " AND ";
 719             }
 720             else {
 721                 or +="( " + history_array[i].get_column_name() + " " + history_array[i].get_obj().getrelation_operator() + " " + history_array[i].get_obj().getquery() +")";
 722                 or +=" OR " ;
 723             }
 724         }
 725     }
 726     if ( or != "(") {
 727         or = or.substring(0,(or.length - 4 )) + ")";
 728     } else {
 729         or = "" ;
 730     }
 731     if (and !="(") {
 732         and = and.substring(0,(and.length - 5)) + ")";
 733     } else {
 734         and = "" ;
 735     }
 736     if ( or != "" ) {
 737         and = and + " OR " + or + " )";
 738     }
 739     return and;
 740 }
 741
 742 function check_aggregate(id_this)
 743 {
 744     var i;
 745     for (i = 0;i < history_array.length;i++) {
 746         var temp = '`' + history_array[i].get_tab() + '`.`' +history_array[i].get_column_name() +'`';
 747         if(temp == id_this && history_array[i].get_type() == "Aggregate") {
 748             return history_array[i].get_obj().get_operator() + '(' + id_this +')';
 749         }
 750     }
 751     return "";
 752 }
 753
 754 function check_rename(id_this)
 755 {
 756     var i;
 757     for (i = 0;i < history_array.length;i++) {
 758         var temp = '`' + history_array[i].get_tab() + '`.`' +history_array[i].get_column_name() +'`';
 759         if(temp == id_this && history_array[i].get_type() == "Rename") {
 760             return  " AS `" + history_array[i].get_obj().getrename_to() +"`";
 761         }
 762     }
 763     return "";
 764 }
 765
 766 function gradient(id, level)
 767 {
 768     var box = document.getElementById(id);
 769     box.style.opacity = level;
 770     box.style.MozOpacity = level;
 771     box.style.KhtmlOpacity = level;
 772     box.style.filter = "alpha(opacity=" + level * 100 + ")";
 773     box.style.display="block";
 774     return;
 775 }
 776
 777
 778 function fadein(id)
 779 {
 780     var level = 0;
 781     while(level <= 1){
 782         setTimeout( "gradient('" + id + "'," + level + ")", (level* 1000) + 10);
 783         level += 0.01;
 784     }
 785 }
 786
 787 function closebox()
 788 {
 789     document.getElementById('box').style.display='none';
 790     document.getElementById('filter').style.display='none';
 791 }