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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Display table relations for viewing and editing
*
* includes phpMyAdmin relations and InnoDB relations
*
* @todo fix name handling: currently names with dots (.) are not properly handled for internal relations (but foreign keys relations are correct)
* @todo foreign key constraints require both fields being of equal type and size
* @todo check foreign fields to be from same type and size, all other makes no sense
* @todo add an link to create an index required for constraints, or an option to do automatically
* @todo if above todos are fullfilled we can add all fields meet requirements in the select dropdown
* @package PhpMyAdmin
*/
/**
* Gets some core libraries
*/
require_once './libraries/common.inc.php';
$GLOBALS['js_include'][] = 'tbl_relation.js';
require_once './libraries/tbl_common.php';
$url_query .= '&goto=tbl_sql.php';
/**
* Gets tables informations
*/
require_once './libraries/tbl_info.inc.php';
// Note: in libraries/tbl_links.inc.php we get and display the table comment.
// For InnoDB, this comment contains the REFER information but any update
// has not been done yet (will be done in tbl_relation.php later).
$avoid_show_comment = true;
/**
* Displays top menu links
*/
require_once './libraries/tbl_links.inc.php';
$options_array = array(
'CASCADE' => 'CASCADE',
'SET_NULL' => 'SET NULL',
'NO_ACTION' => 'NO ACTION',
'RESTRICT' => 'RESTRICT',
);
/**
* Generate dropdown choices
*
* @param string $dropdown_question Message to display
* @param string $select_name Name of the <select> field
* @param array $choices Choices for dropdown
* @param string $selected_value Selected value
*
* @return string The existing value (for selected)
*
* @access public
*/
function PMA_generate_dropdown($dropdown_question, $select_name, $choices, $selected_value)
{
echo htmlspecialchars($dropdown_question) . ' ';
echo '<select name="' . htmlspecialchars($select_name) . '">' . "\n";
foreach ($choices as $one_value => $one_label) {
echo '<option value="' . htmlspecialchars($one_value) . '"';
if ($selected_value == $one_value) {
echo ' selected="selected" ';
}
echo '>' . htmlspecialchars($one_label) . '</option>' . "\n";
}
echo '</select>' . "\n";
}
/**
* Split a string on backquote pairs
*
* @param string $text original string
*
* @return array containing the elements (and their surrounding backquotes)
*
* @access public
*/
function PMA_backquote_split($text)
{
$elements = array();
$final_pos = strlen($text) - 1;
$pos = 0;
while ($pos <= $final_pos) {
$first_backquote = strpos($text, '`', $pos);
$second_backquote = strpos($text, '`', $first_backquote + 1);
// after the second one, there might be another one which means
// this is an escaped backquote
if ($second_backquote < $final_pos && '`' == $text[$second_backquote + 1]) {
$second_backquote = strpos($text, '`', $second_backquote + 2);
}
if (false === $first_backquote || false === $second_backquote) {
break;
}
$elements[] = substr($text, $first_backquote, $second_backquote - $first_backquote + 1);
$pos = $second_backquote + 1;
}
return($elements);
}
/**
* Gets the relation settings
*/
$cfgRelation = PMA_getRelationsParam();
/**
* Updates
*/
if ($cfgRelation['relwork']) {
$existrel = PMA_getForeigners($db, $table, '', 'internal');
}
if (PMA_foreignkey_supported($tbl_type)) {
$existrel_foreign = PMA_getForeigners($db, $table, '', 'foreign');
}
if ($cfgRelation['displaywork']) {
$disp = PMA_getDisplayField($db, $table);
}
// will be used in the logic for internal relations and foreign keys:
$me_fields_name = isset($_REQUEST['fields_name'])
? $_REQUEST['fields_name']
: null;
// u p d a t e s f o r I n t e r n a l r e l a t i o n s
if (isset($destination) && $cfgRelation['relwork']) {
foreach ($destination as $master_field_md5 => $foreign_string) {
$upd_query = false;
// Map the fieldname's md5 back to its real name
$master_field = $me_fields_name[$master_field_md5];
if (! empty($foreign_string)) {
$foreign_string = trim($foreign_string, '`');
list($foreign_db, $foreign_table, $foreign_field) = explode('.', $foreign_string);
if (! isset($existrel[$master_field])) {
$upd_query = 'INSERT INTO ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation'])
. '(master_db, master_table, master_field, foreign_db, foreign_table, foreign_field)'
. ' values('
. '\'' . PMA_sqlAddSlashes($db) . '\', '
. '\'' . PMA_sqlAddSlashes($table) . '\', '
. '\'' . PMA_sqlAddSlashes($master_field) . '\', '
. '\'' . PMA_sqlAddSlashes($foreign_db) . '\', '
. '\'' . PMA_sqlAddSlashes($foreign_table) . '\','
. '\'' . PMA_sqlAddSlashes($foreign_field) . '\')';
} elseif ($existrel[$master_field]['foreign_db'] . '.' .$existrel[$master_field]['foreign_table'] . '.' . $existrel[$master_field]['foreign_field'] != $foreign_string) {
$upd_query = 'UPDATE ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation']) . ' SET'
. ' foreign_db = \'' . PMA_sqlAddSlashes($foreign_db) . '\', '
. ' foreign_table = \'' . PMA_sqlAddSlashes($foreign_table) . '\', '
. ' foreign_field = \'' . PMA_sqlAddSlashes($foreign_field) . '\' '
. ' WHERE master_db = \'' . PMA_sqlAddSlashes($db) . '\''
. ' AND master_table = \'' . PMA_sqlAddSlashes($table) . '\''
. ' AND master_field = \'' . PMA_sqlAddSlashes($master_field) . '\'';
} // end if... else....
} elseif (isset($existrel[$master_field])) {
$upd_query = 'DELETE FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['relation'])
. ' WHERE master_db = \'' . PMA_sqlAddSlashes($db) . '\''
. ' AND master_table = \'' . PMA_sqlAddSlashes($table) . '\''
. ' AND master_field = \'' . PMA_sqlAddSlashes($master_field) . '\'';
} // end if... else....
if ($upd_query) {
PMA_query_as_controluser($upd_query);
}
} // end while
} // end if (updates for internal relations)
// u p d a t e s f o r f o r e i g n k e y s
// (for now, one index name only; we keep the definitions if the
// foreign db is not the same)
// I use $sql_query to be able to display directly the query via
// PMA_showMessage()
if (isset($_REQUEST['destination_foreign'])) {
$display_query = '';
$seen_error = false;
foreach ($_REQUEST['destination_foreign'] as $master_field_md5 => $foreign_string) {
// Map the fieldname's md5 back to it's real name
$master_field = $me_fields_name[$master_field_md5];
if (! empty($foreign_string)) {
list($foreign_db, $foreign_table, $foreign_field) = PMA_backquote_split($foreign_string);
if (! isset($existrel_foreign[$master_field])) {
// no key defined for this field
// The next few lines are repeated below, so they
// could be put in an include file
// Note: I tried to enclose the db and table name with
// backquotes but MySQL 4.0.16 did not like the syntax
// (for example: `base2`.`table1`)
$sql_query = 'ALTER TABLE ' . PMA_backquote($table)
. ' ADD FOREIGN KEY ('
. PMA_backquote($master_field) . ')'
. ' REFERENCES '
. $foreign_db . '.'
. $foreign_table . '('
. $foreign_field . ')';
if (! empty($_REQUEST['on_delete'][$master_field_md5])) {
$sql_query .= ' ON DELETE ' . $options_array[$_REQUEST['on_delete'][$master_field_md5]];
}
if (! empty($_REQUEST['on_update'][$master_field_md5])) {
$sql_query .= ' ON UPDATE ' . $options_array[$_REQUEST['on_update'][$master_field_md5]];
}
$sql_query .= ';';
$display_query .= $sql_query . "\n";
// end repeated code
} elseif (PMA_backquote($existrel_foreign[$master_field]['foreign_db']) != $foreign_db
|| PMA_backquote($existrel_foreign[$master_field]['foreign_table']) != $foreign_table
|| PMA_backquote($existrel_foreign[$master_field]['foreign_field']) != $foreign_field
|| ($_REQUEST['on_delete'][$master_field_md5] != (!empty($existrel_foreign[$master_field]['on_delete']) ? $existrel_foreign[$master_field]['on_delete'] : 'RESTRICT'))
|| ($_REQUEST['on_update'][$master_field_md5] != (!empty($existrel_foreign[$master_field]['on_update']) ? $existrel_foreign[$master_field]['on_update'] : 'RESTRICT'))
) {
// another foreign key is already defined for this field
// or
// an option has been changed for ON DELETE or ON UPDATE
// remove existing key and add the new one
$sql_query = 'ALTER TABLE ' . PMA_backquote($table)
. ' DROP FOREIGN KEY '
. PMA_backquote($existrel_foreign[$master_field]['constraint']) . ', '
. 'ADD FOREIGN KEY ('
. PMA_backquote($master_field) . ')'
. ' REFERENCES '
. $foreign_db . '.'
. $foreign_table . '('
. $foreign_field . ')';
if (! empty($_REQUEST['on_delete'][$master_field_md5])) {
$sql_query .= ' ON DELETE '
. $options_array[$_REQUEST['on_delete'][$master_field_md5]];
}
if (! empty($_REQUEST['on_update'][$master_field_md5])) {
$sql_query .= ' ON UPDATE '
. $options_array[$_REQUEST['on_update'][$master_field_md5]];
}
$sql_query .= ';';
$display_query .= $sql_query . "\n";
} // end if... else....
} elseif (isset($existrel_foreign[$master_field])) {
$sql_query = 'ALTER TABLE ' . PMA_backquote($table)
. ' DROP FOREIGN KEY '
. PMA_backquote($existrel_foreign[$master_field]['constraint']);
$sql_query .= ';';
$display_query .= $sql_query . "\n";
} // end if... else....
if (! empty($sql_query)) {
PMA_DBI_try_query($sql_query);
$tmp_error = PMA_DBI_getError();
if (! empty($tmp_error)) {
$seen_error = true;
}
if (substr($tmp_error, 1, 4) == '1216'
|| substr($tmp_error, 1, 4) == '1452'
) {
PMA_mysqlDie($tmp_error, $sql_query, false, '', false);
echo PMA_showMySQLDocu('manual_Table_types', 'InnoDB_foreign_key_constraints') . "\n";
}
if (substr($tmp_error, 1, 4) == '1005') {
$message = PMA_Message::error(__('Error creating foreign key on %1$s (check data types)'));
$message->addParam($master_field);
$message->display();
echo PMA_showMySQLDocu('manual_Table_types', 'InnoDB_foreign_key_constraints') . "\n";
}
unset($tmp_error);
$sql_query = '';
}
} // end foreach
if (!empty($display_query)) {
if ($seen_error) {
PMA_showMessage(__('Error'), null, 'error');
} else {
PMA_showMessage(__('Your SQL query has been executed successfully'), null, 'success');
}
}
} // end if isset($destination_foreign)
// U p d a t e s f o r d i s p l a y f i e l d
if ($cfgRelation['displaywork'] && isset($display_field)) {
$upd_query = false;
if ($disp) {
if ($display_field != '') {
$upd_query = 'UPDATE ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_info'])
. ' SET display_field = \'' . PMA_sqlAddSlashes($display_field) . '\''
. ' WHERE db_name = \'' . PMA_sqlAddSlashes($db) . '\''
. ' AND table_name = \'' . PMA_sqlAddSlashes($table) . '\'';
} else {
$upd_query = 'DELETE FROM ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_info'])
. ' WHERE db_name = \'' . PMA_sqlAddSlashes($db) . '\''
. ' AND table_name = \'' . PMA_sqlAddSlashes($table) . '\'';
}
} elseif ($display_field != '') {
$upd_query = 'INSERT INTO ' . PMA_backquote($GLOBALS['cfgRelation']['db']) . '.' . PMA_backquote($cfgRelation['table_info'])
. '(db_name, table_name, display_field) '
. ' VALUES('
. '\'' . PMA_sqlAddSlashes($db) . '\','
. '\'' . PMA_sqlAddSlashes($table) . '\','
. '\'' . PMA_sqlAddSlashes($display_field) . '\')';
}
if ($upd_query) {
PMA_query_as_controluser($upd_query);
}
} // end if
// If we did an update, refresh our data
if (isset($destination) && $cfgRelation['relwork']) {
$existrel = PMA_getForeigners($db, $table, '', 'internal');
}
if (isset($destination_foreign) && PMA_foreignkey_supported($tbl_type)) {
$existrel_foreign = PMA_getForeigners($db, $table, '', 'foreign');
}
if ($cfgRelation['displaywork']) {
$disp = PMA_getDisplayField($db, $table);
}
/**
* Dialog
*/
// common form
echo '<form method="post" action="tbl_relation.php">' . "\n";
echo PMA_generate_common_hidden_inputs($db, $table);
// relations
if ($cfgRelation['relwork'] || PMA_foreignkey_supported($tbl_type)) {
// To choose relations we first need all tables names in current db
// and if the main table supports foreign keys
// we use SHOW TABLE STATUS because we need to find other tables of the
// same engine.
if (PMA_foreignkey_supported($tbl_type)) {
$tab_query = 'SHOW TABLE STATUS FROM ' . PMA_backquote($db);
// [0] of the row is the name
// [1] is the type
} else {
$tab_query = 'SHOW TABLES FROM ' . PMA_backquote($db);
// [0] of the row is the name
}
$tab_rs = PMA_DBI_query($tab_query, null, PMA_DBI_QUERY_STORE);
$selectboxall[] = '';
$selectboxall_foreign[] = '';
while ($curr_table = PMA_DBI_fetch_row($tab_rs)) {
$current_table = new PMA_Table($curr_table[0], $db);
// explicitely ask for non-quoted list of indexed columns
$selectboxall = array_merge($selectboxall, $current_table->getUniqueColumns($backquoted = false));
// if foreign keys are supported, collect all keys from other
// tables of the same engine
if (PMA_foreignkey_supported($tbl_type)
&& isset($curr_table[1])
&& strtoupper($curr_table[1]) == $tbl_type
) {
// explicitely ask for non-quoted list of indexed columns
// need to obtain backquoted values to support dots inside values
$selectboxall_foreign = array_merge($selectboxall_foreign, $current_table->getIndexedColumns($backquoted = true));
}
} // end while over tables
} // end if
// Now find out the columns of our $table
// need to use PMA_DBI_QUERY_STORE with PMA_DBI_num_rows() in mysqli
$columns = PMA_DBI_get_columns($db, $table);
if (count($columns) > 0) {
foreach ($columns as $row) {
$save_row[] = $row;
}
$saved_row_cnt = count($save_row);
?>
<fieldset>
<legend><?php echo __('Relations'); ?></legend>
<table>
<tr><th><?php echo __('Column'); ?></th>
<?php
if ($cfgRelation['relwork']) {
echo '<th>' . __('Internal relation');
if (PMA_foreignkey_supported($tbl_type)) {
echo PMA_showHint(__('An internal relation is not necessary when a corresponding FOREIGN KEY relation exists.'));
}
echo '</th>';
}
if (PMA_foreignkey_supported($tbl_type)) {
// this does not have to be translated, it's part of the MySQL syntax
echo '<th colspan="2">' . __('Foreign key constraint') . ' (' . $tbl_type . ')';
echo '</th>';
}
?>
</tr>
<?php
$odd_row = true;
for ($i = 0; $i < $saved_row_cnt; $i++) {
$myfield = $save_row[$i]['Field'];
// Use an md5 as array index to avoid having special characters in the name atttibure (see bug #1746964 )
$myfield_md5 = md5($myfield);
$myfield_html = htmlspecialchars($myfield);
?>
<tr class="<?php echo $odd_row ? 'odd' : 'even'; $odd_row = ! $odd_row; ?>">
<td align="center">
<strong><?php echo $myfield_html; ?></strong>
<input type="hidden" name="fields_name[<?php echo $myfield_md5; ?>]" value="<?php echo $myfield_html; ?>"/>
</td>
<?php
if ($cfgRelation['relwork']) {
?>
<td><select name="destination[<?php echo $myfield_md5; ?>]">
<?php
// PMA internal relations
if (isset($existrel[$myfield])) {
$foreign_field = $existrel[$myfield]['foreign_db'] . '.'
. $existrel[$myfield]['foreign_table'] . '.'
. $existrel[$myfield]['foreign_field'];
} else {
$foreign_field = false;
}
$seen_key = false;
foreach ($selectboxall as $value) {
echo ' '
. '<option value="' . htmlspecialchars($value) . '"';
if ($foreign_field && $value == $foreign_field) {
echo ' selected="selected"';
$seen_key = true;
}
echo '>' . htmlspecialchars($value) . '</option>'. "\n";
} // end while
// if the link defined in relationtable points to a foreign field
// that is not a key in the foreign table, we show the link
// (will not be shown with an arrow)
if ($foreign_field && !$seen_key) {
echo ' '
.'<option value="' . htmlspecialchars($foreign_field) . '"'
.' selected="selected"'
.'>' . $foreign_field . '</option>'. "\n";
}
?>
</select>
</td>
<?php
} // end if (internal relations)
if (PMA_foreignkey_supported($tbl_type)) {
echo '<td>';
if (!empty($save_row[$i]['Key'])) {
?>
<span class="formelement">
<select name="destination_foreign[<?php echo $myfield_md5; ?>]" class="referenced_column_dropdown">
<?php
if (isset($existrel_foreign[$myfield])) {
// need to backquote to support a dot character inside
// an element
$foreign_field = PMA_backquote($existrel_foreign[$myfield]['foreign_db']) . '.'
. PMA_backquote($existrel_foreign[$myfield]['foreign_table']) . '.'
. PMA_backquote($existrel_foreign[$myfield]['foreign_field']);
} else {
$foreign_field = false;
}
$found_foreign_field = false;
foreach ($selectboxall_foreign as $value) {
echo ' '
. '<option value="' . htmlspecialchars($value) . '"';
if ($foreign_field && $value == $foreign_field) {
echo ' selected="selected"';
$found_foreign_field = true;
}
echo '>' . htmlspecialchars($value) . '</option>'. "\n";
} // end while
// we did not find the foreign field in the tables of current db,
// must be defined in another db so show it to avoid erasing it
if (!$found_foreign_field && $foreign_field) {
echo ' '
. '<option value="' . htmlspecialchars($foreign_field) . '"';
echo ' selected="selected"';
echo '>' . $foreign_field . '</option>' . "\n";
}
?>
</select>
</span>
<span class="formelement">
<?php
// For ON DELETE and ON UPDATE, the default action
// is RESTRICT as per MySQL doc; however, a SHOW CREATE TABLE
// won't display the clause if it's set as RESTRICT.
PMA_generate_dropdown('ON DELETE',
'on_delete[' . $myfield_md5 . ']',
$options_array,
isset($existrel_foreign[$myfield]['on_delete']) ? $existrel_foreign[$myfield]['on_delete']: 'RESTRICT');
echo '</span>' . "\n"
.'<span class="formelement">' . "\n";
PMA_generate_dropdown('ON UPDATE',
'on_update[' . $myfield_md5 . ']',
$options_array,
isset($existrel_foreign[$myfield]['on_update']) ? $existrel_foreign[$myfield]['on_update']: 'RESTRICT');
echo '</span>' . "\n";
} else {
echo __('No index defined!');
} // end if (a key exists)
echo ' </td>';
} // end if (InnoDB)
?>
</tr>
<?php
} // end for
unset( $myfield, $myfield_md5, $myfield_html);
echo ' </table>' . "\n";
echo '</fieldset>' . "\n";
if ($cfgRelation['displaywork']) {
// Get "display_field" infos
$disp = PMA_getDisplayField($db, $table);
?>
<fieldset>
<label><?php echo __('Choose column to display') . ': '; ?></label>
<select name="display_field">
<option value="">---</option>
<?php
foreach ($save_row AS $row) {
echo ' <option value="' . htmlspecialchars($row['Field']) . '"';
if (isset($disp) && $row['Field'] == $disp) {
echo ' selected="selected"';
}
echo '>' . htmlspecialchars($row['Field']) . '</option>'. "\n";
} // end while
?>
</select>
</fieldset>
<?php
} // end if (displayworks)
?>
<fieldset class="tblFooters">
<input type="submit" value="<?php echo __('Save'); ?>" />
</fieldset>
</form>
<?php
} // end if (we have columns in this table)
/**
* Displays the footer
*/
require './libraries/footer.inc.php';
?>
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