tbl_relation.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * Display table relations for viewing and editing
   5  *
   6  * includes phpMyAdmin relations and InnoDB relations
   7  *
   8  * @todo fix name handling: currently names with dots (.) are not properly handled
   9  * @todo foreign key constraints require both fields being of equal type and size
  10  * @todo check foreign fields to be from same type and size, all other makes no sense
  11  * @todo add an link to create an index required for constraints, or an option to do automatically
  12  * @todo if above todos are fullfilled we can add all fields meet requirements in the select dropdown
  13  * @version $Id$
  14  * @package phpMyAdmin
  15  */
  16
  17 /**
  18  * Gets some core libraries
  19  */
  20 require_once './libraries/common.inc.php';
  21 require_once './libraries/tbl_common.php';
  22 $url_query .= '&amp;goto=tbl_sql.php';
  23
  24
  25 /**
  26  * Gets tables informations
  27  */
  28 require_once './libraries/tbl_info.inc.php';
  29
  30 // Note: in libraries/tbl_links.inc.php we get and display the table comment.
  31 // For InnoDB, this comment contains the REFER information but any update
  32 // has not been done yet (will be done in tbl_relation.php later).
  33 $avoid_show_comment = TRUE;
  34
  35 /**
  36  * Displays top menu links
  37  */
  38 require_once './libraries/tbl_links.inc.php';
  39
  40 require_once './libraries/relation.lib.php';
  41
  42 $options_array = array(
  43     'CASCADE'   => 'CASCADE',
  44     'SET_NULL'  => 'SET NULL',
  45     'NO_ACTION' => 'NO ACTION',
  46     'RESTRICT'  => 'RESTRICT',
  47 );
  48
  49 /**
  50  * Generate dropdown choices
  51  *
  52  * @param   string   Message to display
  53  * @param   string   Name of the <select> field
  54  * @param   array    Choices for dropdown
  55  * @return  string   The existing value (for selected)
  56  *
  57  * @access  public
  58  */
  59 function PMA_generate_dropdown($dropdown_question, $select_name, $choices, $selected_value)
  60 {
  61     echo htmlspecialchars($dropdown_question) . '&nbsp;&nbsp;';
  62
  63     echo '<select name="' . htmlspecialchars($select_name) . '">' . "\n";
  64     echo '<option value=""></option>' . "\n";
  65
  66     foreach ($choices as $one_value => $one_label) {
  67         echo '<option value="' . htmlspecialchars($one_value) . '"';
  68         if ($selected_value == $one_value) {
  69             echo ' selected="selected" ';
  70         }
  71         echo '>' . htmlspecialchars($one_label) . '</option>' . "\n";
  72     }
  73     echo '</select>' . "\n";
  74 }
  75
  76 /**
  77  * Gets the relation settings
  78  */
  79 $cfgRelation = PMA_getRelationsParam();
  80
  81
  82 /**
  83  * Updates
  84  */
  85 if ($cfgRelation['relwork']) {
  86     $existrel = PMA_getForeigners($db, $table, '', 'internal');
  87 }
  88 if (PMA_foreignkey_supported($tbl_type)) {
  89     $existrel_foreign = PMA_getForeigners($db, $table, '', 'foreign');
  90 }
  91 if ($cfgRelation['displaywork']) {
  92     $disp     = PMA_getDisplayField($db, $table);
  93 }
  94
  95 // will be used in the logic for internal relations and foreign keys:
  96 $me_fields_name =
  97     isset($_REQUEST['fields_name'])
  98     ? $_REQUEST['fields_name']
  99     : null;
 100
 101 // u p d a t e s   f o r   I n t e r n a l    r e l a t i o n s
 102 if (isset($destination) && $cfgRelation['relwork']) {
 103
 104     foreach ($destination as $master_field_md5 => $foreign_string) {
 105         $upd_query = false;
 106
 107         // Map the fieldname's md5 back to its real name
 108         $master_field = $me_fields_name[$master_field_md5];
 109
 110         if (! empty($foreign_string)) {
 111             $foreign_string = trim($foreign_string, '`');
 112             list($foreign_db, $foreign_table, $foreign_field) =
 113                 explode('.', $foreign_string);
 114             if (! isset($existrel[$master_field])) {
 115                 $upd_query  = 'INSERT INTO ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation'])
 116                             . '(master_db, master_table, master_field, foreign_db, foreign_table, foreign_field)'
 117                             . ' values('
 118                             . '\'' . PMA_sqlAddslashes($db) . '\', '
 119                             . '\'' . PMA_sqlAddslashes($table) . '\', '
 120                             . '\'' . PMA_sqlAddslashes($master_field) . '\', '
 121                             . '\'' . PMA_sqlAddslashes($foreign_db) . '\', '
 122                             . '\'' . PMA_sqlAddslashes($foreign_table) . '\','
 123                             . '\'' . PMA_sqlAddslashes($foreign_field) . '\')';
 124             } elseif ($existrel[$master_field]['foreign_db'] . '.' .$existrel[$master_field]['foreign_table'] . '.' . $existrel[$master_field]['foreign_field'] != $foreign_string) {
 125                 $upd_query  = 'UPDATE ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation']) . ' SET'
 126                             . ' foreign_db       = \'' . PMA_sqlAddslashes($foreign_db) . '\', '
 127                             . ' foreign_table    = \'' . PMA_sqlAddslashes($foreign_table) . '\', '
 128                             . ' foreign_field    = \'' . PMA_sqlAddslashes($foreign_field) . '\' '
 129                             . ' WHERE master_db  = \'' . PMA_sqlAddslashes($db) . '\''
 130                             . ' AND master_table = \'' . PMA_sqlAddslashes($table) . '\''
 131                             . ' AND master_field = \'' . PMA_sqlAddslashes($master_field) . '\'';
 132             } // end if... else....
 133         } elseif (isset($existrel[$master_field])) {
 134             $upd_query      = 'DELETE FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation'])
 135                             . ' WHERE master_db  = \'' . PMA_sqlAddslashes($db) . '\''
 136                             . ' AND master_table = \'' . PMA_sqlAddslashes($table) . '\''
 137                             . ' AND master_field = \'' . PMA_sqlAddslashes($master_field) . '\'';
 138         } // end if... else....
 139         if ($upd_query) {
 140             PMA_query_as_cu($upd_query);
 141         }
 142     } // end while
 143 } // end if (updates for internal relations)
 144
 145 // u p d a t e s    f o r    f o r e i g n    k e y s
 146 // (for now, one index name only; we keep the definitions if the
 147 // foreign db is not the same)
 148 // I use $sql_query to be able to display directly the query via
 149 // PMA_showMessage()
 150
 151 if (isset($_REQUEST['destination_foreign'])) {
 152     $display_query = '';
 153     $seen_error = false;
 154     foreach ($_REQUEST['destination_foreign'] as $master_field_md5 => $foreign_string) {
 155
 156         // Map the fieldname's md5 back to it's real name
 157         $master_field = $me_fields_name[$master_field_md5];
 158
 159         if (! empty($foreign_string)) {
 160             $foreign_string = trim($foreign_string, '`');
 161             list($foreign_db, $foreign_table, $foreign_field) =
 162                 explode('.', $foreign_string);
 163             if (!isset($existrel_foreign[$master_field])) {
 164                 // no key defined for this field
 165
 166                 // The next few lines are repeated below, so they
 167                 // could be put in an include file
 168                 // Note: I tried to enclose the db and table name with
 169                 // backquotes but MySQL 4.0.16 did not like the syntax
 170                 // (for example: `base2`.`table1`)
 171
 172                 $sql_query  = 'ALTER TABLE ' . PMA_backquote($table)
 173                             . ' ADD FOREIGN KEY ('
 174                             . PMA_backquote($master_field) . ')'
 175                             . ' REFERENCES '
 176                             . PMA_backquote($foreign_db) . '.'
 177                             . PMA_backquote($foreign_table) . '('
 178                             . PMA_backquote($foreign_field) . ')';
 179
 180                 if (! empty($_REQUEST['on_delete'][$master_field_md5])) {
 181                     $sql_query .= ' ON DELETE ' . $options_array[$_REQUEST['on_delete'][$master_field_md5]];
 182                 }
 183                 if (! empty($_REQUEST['on_update'][$master_field_md5])) {
 184                     $sql_query .= ' ON UPDATE ' . $options_array[$_REQUEST['on_update'][$master_field_md5]];
 185                 }
 186                 $sql_query .= ';';
 187                 $display_query .= $sql_query . "\n";
 188                 // end repeated code
 189
 190             } elseif (($existrel_foreign[$master_field]['foreign_db'] . '.' .$existrel_foreign[$master_field]['foreign_table'] . '.' . $existrel_foreign[$master_field]['foreign_field'] != $foreign_string)
 191               || ($_REQUEST['on_delete'][$master_field_md5] != (!empty($existrel_foreign[$master_field]['on_delete']) ? $existrel_foreign[$master_field]['on_delete'] : ''))
 192               || ($_REQUEST['on_update'][$master_field_md5] != (!empty($existrel_foreign[$master_field]['on_update']) ? $existrel_foreign[$master_field]['on_update'] : ''))
 193                    ) {
 194                 // another foreign key is already defined for this field
 195                 // or
 196                 // an option has been changed for ON DELETE or ON UPDATE
 197
 198                 // remove existing key
 199                 $sql_query  = 'ALTER TABLE ' . PMA_backquote($table)
 200                             . ' DROP FOREIGN KEY '
 201                             . PMA_backquote($existrel_foreign[$master_field]['constraint']) . ';';
 202
 203                 // I tried to send both in one query but it failed
 204                 PMA_DBI_query($sql_query);
 205                 $display_query .= $sql_query . "\n";
 206
 207                 // add another
 208                 $sql_query  = 'ALTER TABLE ' . PMA_backquote($table)
 209                             . ' ADD FOREIGN KEY ('
 210                             . PMA_backquote($master_field) . ')'
 211                             . ' REFERENCES '
 212                             . PMA_backquote($foreign_db) . '.'
 213                             . PMA_backquote($foreign_table) . '('
 214                             . PMA_backquote($foreign_field) . ')';
 215
 216                 if (! empty($_REQUEST['on_delete'][$master_field_md5])) {
 217                     $sql_query   .= ' ON DELETE '
 218                         . $options_array[$_REQUEST['on_delete'][$master_field_md5]];
 219                 }
 220                 if (! empty($_REQUEST['on_update'][$master_field_md5])) {
 221                     $sql_query   .= ' ON UPDATE '
 222                         . $options_array[$_REQUEST['on_update'][$master_field_md5]];
 223                 }
 224                 $sql_query .= ';';
 225                 $display_query .= $sql_query . "\n";
 226
 227             } // end if... else....
 228         } elseif (isset($existrel_foreign[$master_field])) {
 229             $sql_query  = 'ALTER TABLE ' . PMA_backquote($table)
 230                     . ' DROP FOREIGN KEY '
 231                     . PMA_backquote($existrel_foreign[$master_field]['constraint']);
 232             $sql_query .= ';';
 233             $display_query .= $sql_query . "\n";
 234         } // end if... else....
 235
 236         if (! empty($sql_query)) {
 237             PMA_DBI_try_query($sql_query);
 238             $tmp_error = PMA_DBI_getError();
 239             if (! empty($tmp_error)) {
 240                 $seen_error = true;
 241             }
 242             if (substr($tmp_error, 1, 4) == '1216'
 243             ||  substr($tmp_error, 1, 4) == '1452') {
 244                 PMA_mysqlDie($tmp_error, $sql_query, FALSE, '', FALSE);
 245                 echo PMA_showMySQLDocu('manual_Table_types', 'InnoDB_foreign_key_constraints') . "\n";
 246             }
 247             if (substr($tmp_error, 1, 4) == '1005') {
 248                 $message = PMA_Message::warning('strForeignKeyError');
 249                 $message->addParam($master_field);
 250                 $message->display();
 251                 echo PMA_showMySQLDocu('manual_Table_types', 'InnoDB_foreign_key_constraints') . "\n";
 252             }
 253             unset($tmp_error);
 254             $sql_query = '';
 255         }
 256     } // end foreach
 257     if (!empty($display_query)) {
 258         if ($seen_error) {
 259             PMA_showMessage($strError, null, 'error');
 260         } else {
 261             PMA_showMessage($strSuccess, null, 'success');
 262         }
 263     }
 264 } // end if isset($destination_foreign)
 265
 266
 267 // U p d a t e s   f o r   d i s p l a y   f i e l d
 268
 269 if ($cfgRelation['displaywork'] && isset($display_field)) {
 270     $upd_query = false;
 271     if ($disp) {
 272         if ($display_field != '') {
 273             $upd_query = 'UPDATE ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_info'])
 274                        . ' SET display_field = \'' . PMA_sqlAddslashes($display_field) . '\''
 275                        . ' WHERE db_name  = \'' . PMA_sqlAddslashes($db) . '\''
 276                        . ' AND table_name = \'' . PMA_sqlAddslashes($table) . '\'';
 277         } else {
 278             $upd_query = 'DELETE FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_info'])
 279                        . ' WHERE db_name  = \'' . PMA_sqlAddslashes($db) . '\''
 280                        . ' AND table_name = \'' . PMA_sqlAddslashes($table) . '\'';
 281         }
 282     } elseif ($display_field != '') {
 283         $upd_query = 'INSERT INTO ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_info'])
 284                    . '(db_name, table_name, display_field) '
 285                    . ' VALUES('
 286                    . '\'' . PMA_sqlAddslashes($db) . '\','
 287                    . '\'' . PMA_sqlAddslashes($table) . '\','
 288                    . '\'' . PMA_sqlAddslashes($display_field) . '\')';
 289     }
 290
 291     if ($upd_query) {
 292         PMA_query_as_cu($upd_query);
 293     }
 294 } // end if
 295
 296 // If we did an update, refresh our data
 297 if (isset($destination) && $cfgRelation['relwork']) {
 298     $existrel = PMA_getForeigners($db, $table, '', 'internal');
 299 }
 300 if (isset($destination_foreign) && PMA_foreignkey_supported($tbl_type)) {
 301     $existrel_foreign = PMA_getForeigners($db, $table, '', 'foreign');
 302 }
 303
 304 if ($cfgRelation['displaywork']) {
 305     $disp     = PMA_getDisplayField($db, $table);
 306 }
 307
 308
 309 /**
 310  * Dialog
 311  */
 312
 313 // common form
 314 echo '<form method="post" action="tbl_relation.php">' . "\n";
 315 echo PMA_generate_common_hidden_inputs($db, $table);
 316
 317
 318 // relations
 319
 320 if ($cfgRelation['relwork'] || PMA_foreignkey_supported($tbl_type)) {
 321     // To choose relations we first need all tables names in current db
 322     // and if the main table supports foreign keys
 323     // we use SHOW TABLE STATUS because we need to find other tables of the
 324     // same engine.
 325
 326     if (PMA_foreignkey_supported($tbl_type)) {
 327         $tab_query           = 'SHOW TABLE STATUS FROM ' . PMA_backquote($db);
 328         // [0] of the row is the name
 329         // [1] is the type
 330     } else {
 331         $tab_query           = 'SHOW TABLES FROM ' . PMA_backquote($db);
 332         // [0] of the row is the name
 333     }
 334
 335     $tab_rs              = PMA_DBI_query($tab_query, null, PMA_DBI_QUERY_STORE);
 336     $selectboxall[] = '';
 337     $selectboxall_foreign[] = '';
 338
 339     while ($curr_table = PMA_DBI_fetch_row($tab_rs)) {
 340         $current_table = new PMA_Table($curr_table[0], $db);
 341
 342         // explicitely ask for non-quoted list of indexed columns
 343         $selectboxall = array_merge($selectboxall, $current_table->getUniqueColumns(false));
 344
 345         // if foreign keys are supported, collect all keys from other
 346         // tables of the same engine
 347         if (PMA_foreignkey_supported($tbl_type)
 348          && isset($curr_table[1])
 349          && strtoupper($curr_table[1]) == $tbl_type) {
 350              // explicitely ask for non-quoted list of indexed columns
 351             $selectboxall_foreign = array_merge($selectboxall_foreign, $current_table->getIndexedColumns(false));
 352         }
 353     } // end while over tables
 354 } // end if
 355
 356 // Now find out the columns of our $table
 357 // need to use PMA_DBI_QUERY_STORE with PMA_DBI_num_rows() in mysqli
 358 $col_rs    = PMA_DBI_try_query('SHOW COLUMNS FROM ' . PMA_backquote($table) . ';', null, PMA_DBI_QUERY_STORE);
 359
 360 if ($col_rs && PMA_DBI_num_rows($col_rs) > 0) {
 361     while ($row = PMA_DBI_fetch_assoc($col_rs)) {
 362         $save_row[] = $row;
 363     }
 364     $saved_row_cnt  = count($save_row);
 365     ?>
 366     <fieldset>
 367     <legend><?php echo $strLinksTo; ?></legend>
 368
 369     <table>
 370     <tr><th></th>
 371     <?php
 372     if ($cfgRelation['relwork']) {
 373         echo '<th>' . $strInternalRelations;
 374         if (PMA_foreignkey_supported($tbl_type)) {
 375             echo PMA_showHint($strInternalAndForeign);
 376         }
 377         echo '</th>';
 378     }
 379     if (PMA_foreignkey_supported($tbl_type)) {
 380         // this does not have to be translated, it's part of the MySQL syntax
 381         echo '<th colspan="2">FOREIGN KEY (' . $tbl_type . ')';
 382         echo '</th>';
 383     }
 384     ?>
 385     </tr>
 386     <?php
 387     $odd_row = true;
 388     for ($i = 0; $i < $saved_row_cnt; $i++) {
 389         $myfield = $save_row[$i]['Field'];
 390         // Use an md5 as array index to avoid having special characters in the name atttibure (see bug #1746964 )
 391         $myfield_md5 = md5($myfield);
 392         $myfield_html = htmlspecialchars($myfield);
 393         ?>
 394     <tr class="<?php echo $odd_row ? 'odd' : 'even'; $odd_row = ! $odd_row; ?>">
 395         <td align="center">
 396             <strong><?php echo $myfield_html; ?></strong>
 397             <input type="hidden" name="fields_name[<?php echo $myfield_md5; ?>]" value="<?php echo $myfield_html; ?>"/>
 398         </td>
 399         <?php
 400         if ($cfgRelation['relwork']) {
 401             ?>
 402         <td><select name="destination[<?php echo $myfield_md5; ?>]">
 403             <?php
 404             // PMA internal relations
 405             if (isset($existrel[$myfield])) {
 406                 $foreign_field    = $existrel[$myfield]['foreign_db'] . '.'
 407                          . $existrel[$myfield]['foreign_table'] . '.'
 408                          . $existrel[$myfield]['foreign_field'];
 409             } else {
 410                 $foreign_field    = FALSE;
 411             }
 412             $seen_key = FALSE;
 413             foreach ($selectboxall as $value) {
 414                 echo '                '
 415                      . '<option value="' . htmlspecialchars($value) . '"';
 416                 if ($foreign_field && $value == $foreign_field) {
 417                     echo ' selected="selected"';
 418                     $seen_key = TRUE;
 419                 }
 420                 echo '>' . htmlspecialchars($value) . '</option>'. "\n";
 421             } // end while
 422
 423             // if the link defined in relationtable points to a foreign field
 424             // that is not a key in the foreign table, we show the link
 425             // (will not be shown with an arrow)
 426             if ($foreign_field && !$seen_key) {
 427                 echo '                '
 428                     .'<option value="' . htmlspecialchars($foreign_field) . '"'
 429                     .' selected="selected"'
 430                     .'>' . $foreign_field . '</option>'. "\n";
 431             }
 432             ?>
 433             </select>
 434         </td>
 435             <?php
 436         } // end if (internal relations)
 437
 438         if (PMA_foreignkey_supported($tbl_type)) {
 439             echo '<td>';
 440             if (!empty($save_row[$i]['Key'])) {
 441                 ?>
 442             <span class="formelement">
 443             <select name="destination_foreign[<?php echo $myfield_md5; ?>]">
 444                 <?php
 445                 if (isset($existrel_foreign[$myfield])) {
 446                     $foreign_field    = $existrel_foreign[$myfield]['foreign_db'] . '.'
 447                              . $existrel_foreign[$myfield]['foreign_table'] . '.'
 448                              . $existrel_foreign[$myfield]['foreign_field'];
 449                 } else {
 450                     $foreign_field    = FALSE;
 451                 }
 452
 453                 $found_foreign_field = FALSE;
 454                 foreach ($selectboxall_foreign as $value) {
 455                     echo '                '
 456                          . '<option value="' . htmlspecialchars($value) . '"';
 457                     if ($foreign_field && $value == $foreign_field) {
 458                         echo ' selected="selected"';
 459                         $found_foreign_field = TRUE;
 460                     }
 461                     echo '>' . htmlspecialchars($value) . '</option>'. "\n";
 462                 } // end while
 463
 464                 // we did not find the foreign field in the tables of current db,
 465                 // must be defined in another db so show it to avoid erasing it
 466                 if (!$found_foreign_field && $foreign_field) {
 467                     echo '                '
 468                          . '<option value="' . htmlspecialchars($foreign_field) . '"';
 469                     echo ' selected="selected"';
 470                     echo '>' . $foreign_field . '</option>' . "\n";
 471                 }
 472
 473                 ?>
 474             </select>
 475             </span>
 476             <span class="formelement">
 477                 <?php
 478                 PMA_generate_dropdown('ON DELETE',
 479                     'on_delete[' . $myfield_md5 . ']',
 480                     $options_array,
 481                     isset($existrel_foreign[$myfield]['on_delete']) ? $existrel_foreign[$myfield]['on_delete']: '');
 482
 483                 echo '</span>' . "\n"
 484                     .'<span class="formelement">' . "\n";
 485
 486                 PMA_generate_dropdown('ON UPDATE',
 487                     'on_update[' . $myfield_md5 . ']',
 488                     $options_array,
 489                     isset($existrel_foreign[$myfield]['on_update']) ? $existrel_foreign[$myfield]['on_update']: '');
 490                 echo '</span>' . "\n";
 491             } else {
 492                 echo $strNoIndex;
 493             } // end if (a key exists)
 494             echo '        </td>';
 495         } // end if (InnoDB)
 496         ?>
 497     </tr>
 498         <?php
 499     } // end for
 500
 501     unset( $myfield, $myfield_md5, $myfield_html);
 502
 503     echo '    </table>' . "\n";
 504     echo '</fieldset>' . "\n";
 505
 506     if ($cfgRelation['displaywork']) {
 507         // Get "display_field" infos
 508         $disp = PMA_getDisplayField($db, $table);
 509         ?>
 510     <fieldset>
 511         <label><?php echo $strChangeDisplay . ': '; ?></label>
 512         <select name="display_field" style="vertical-align: middle">
 513             <option value="">---</option>
 514         <?php
 515         foreach ($save_row AS $row) {
 516             echo '            <option value="' . htmlspecialchars($row['Field']) . '"';
 517             if (isset($disp) && $row['Field'] == $disp) {
 518                 echo ' selected="selected"';
 519             }
 520             echo '>' . htmlspecialchars($row['Field']) . '</option>'. "\n";
 521         } // end while
 522         ?>
 523         </select>
 524     </fieldset>
 525         <?php
 526     } // end if (displayworks)
 527     ?>
 528     <fieldset class="tblFooters">
 529         <input type="submit" value="<?php echo $strSave; ?>" />
 530     </fieldset>
 531 </form>
 532     <?php
 533 } // end if (we have columns in this table)
 534
 535 /**
 536  * Displays the footer
 537  */
 538 require_once './libraries/footer.inc.php';
 539 ?>