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