mirror of
https://github.com/cytopia/devilbox.git
synced 2024-12-25 23:41:04 +00:00
690 lines
27 KiB
PHP
690 lines
27 KiB
PHP
<?php
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* Display table relations for viewing and editing
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*
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* includes phpMyAdmin relations and InnoDB relations
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*
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* @todo fix name handling: currently names with dots (.) are not properly handled
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* for internal relations (but foreign keys relations are correct)
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* @todo foreign key constraints require both fields being of equal type and size
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* @todo check foreign fields to be from same type and size, all other makes no sense
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* @todo add an link to create an index required for constraints,
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* or an option to do automatically
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* @todo if above todos are fullfilled we can add all fields meet requirements
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* in the select dropdown
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* @package PhpMyAdmin
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*/
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/**
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* Gets some core libraries
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*/
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require_once 'libraries/common.inc.php';
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require_once 'libraries/index.lib.php';
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$response = PMA_Response::getInstance();
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$header = $response->getHeader();
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$scripts = $header->getScripts();
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$scripts->addFile('tbl_relation.js');
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$scripts->addFile('indexes.js');
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/**
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* Sets globals from $_POST
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*/
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$post_params = array(
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'destination',
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'destination_foreign',
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'display_field',
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'fields_name',
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'on_delete',
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'on_update'
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);
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foreach ($post_params as $one_post_param) {
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if (isset($_POST[$one_post_param])) {
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$GLOBALS[$one_post_param] = $_POST[$one_post_param];
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}
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}
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/**
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* Gets tables informations
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*/
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require_once 'libraries/tbl_info.inc.php';
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$options_array = array(
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'CASCADE' => 'CASCADE',
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'SET_NULL' => 'SET NULL',
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'NO_ACTION' => 'NO ACTION',
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'RESTRICT' => 'RESTRICT',
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);
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/**
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* Gets the relation settings
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*/
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$cfgRelation = PMA_getRelationsParam();
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/**
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* Updates
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*/
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if ($cfgRelation['relwork']) {
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$existrel = PMA_getForeigners($db, $table, '', 'internal');
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}
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if (PMA_Util::isForeignKeySupported($tbl_storage_engine)) {
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$existrel_foreign = PMA_getForeigners($db, $table, '', 'foreign');
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}
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if ($cfgRelation['displaywork']) {
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$disp = PMA_getDisplayField($db, $table);
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}
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// will be used in the logic for internal relations and foreign keys:
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$multi_edit_columns_name = isset($_REQUEST['fields_name'])
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? $_REQUEST['fields_name']
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: null;
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$html_output = '';
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// 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
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if (isset($destination) && $cfgRelation['relwork']) {
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foreach ($destination as $master_field_md5 => $foreign_string) {
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$upd_query = false;
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// Map the fieldname's md5 back to its real name
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$master_field = $multi_edit_columns_name[$master_field_md5];
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if (! empty($foreign_string)) {
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$foreign_string = trim($foreign_string, '`');
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list($foreign_db, $foreign_table, $foreign_field)
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= explode('.', $foreign_string);
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if (! isset($existrel[$master_field])) {
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$upd_query = 'INSERT INTO '
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. PMA_Util::backquote($GLOBALS['cfgRelation']['db'])
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. '.' . PMA_Util::backquote($cfgRelation['relation'])
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. '(master_db, master_table, master_field, foreign_db,'
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. ' foreign_table, foreign_field)'
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. ' values('
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. '\'' . PMA_Util::sqlAddSlashes($db) . '\', '
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. '\'' . PMA_Util::sqlAddSlashes($table) . '\', '
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. '\'' . PMA_Util::sqlAddSlashes($master_field) . '\', '
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. '\'' . PMA_Util::sqlAddSlashes($foreign_db) . '\', '
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. '\'' . PMA_Util::sqlAddSlashes($foreign_table) . '\','
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. '\'' . PMA_Util::sqlAddSlashes($foreign_field) . '\')';
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} elseif ($existrel[$master_field]['foreign_db'] . '.' .$existrel[$master_field]['foreign_table'] . '.' . $existrel[$master_field]['foreign_field'] != $foreign_string) {
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$upd_query = 'UPDATE '
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. PMA_Util::backquote($GLOBALS['cfgRelation']['db'])
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. '.' . PMA_Util::backquote($cfgRelation['relation']) . ' SET'
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. ' foreign_db = \''
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. PMA_Util::sqlAddSlashes($foreign_db) . '\', '
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. ' foreign_table = \''
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. PMA_Util::sqlAddSlashes($foreign_table) . '\', '
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. ' foreign_field = \''
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. PMA_Util::sqlAddSlashes($foreign_field) . '\' '
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. ' WHERE master_db = \'' . PMA_Util::sqlAddSlashes($db) . '\''
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. ' AND master_table = \''
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. PMA_Util::sqlAddSlashes($table) . '\''
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. ' AND master_field = \''
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. PMA_Util::sqlAddSlashes($master_field) . '\'';
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} // end if... else....
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} elseif (isset($existrel[$master_field])) {
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$upd_query = 'DELETE FROM '
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. PMA_Util::backquote($GLOBALS['cfgRelation']['db'])
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. '.' . PMA_Util::backquote($cfgRelation['relation'])
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. ' WHERE master_db = \'' . PMA_Util::sqlAddSlashes($db) . '\''
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. ' AND master_table = \'' . PMA_Util::sqlAddSlashes($table) . '\''
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. ' AND master_field = \'' . PMA_Util::sqlAddSlashes($master_field)
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. '\'';
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} // end if... else....
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if ($upd_query) {
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PMA_queryAsControlUser($upd_query);
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}
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} // end while
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} // end if (updates for internal relations)
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// u p d a t e s f o r f o r e i g n k e y s
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// (for now, one index name only; we keep the definitions if the
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// foreign db is not the same)
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if (isset($_REQUEST['destination_foreign'])) {
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$display_query = '';
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$seen_error = false;
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foreach ($_REQUEST['destination_foreign'] as $master_field_md5 => $foreign_string) {
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$create = false;
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$drop = false;
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// Map the fieldname's md5 back to it's real name
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$master_field = $multi_edit_columns_name[$master_field_md5];
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if (! empty($foreign_string)) {
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list($foreign_db, $foreign_table, $foreign_field)
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= PMA_backquoteSplit($foreign_string);
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if (! isset($existrel_foreign[$master_field])) {
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// no key defined for this field
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$create = true;
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} elseif (PMA_Util::backquote($existrel_foreign[$master_field]['foreign_db']) != $foreign_db
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|| PMA_Util::backquote($existrel_foreign[$master_field]['foreign_table']) != $foreign_table
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|| PMA_Util::backquote($existrel_foreign[$master_field]['foreign_field']) != $foreign_field
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|| $_REQUEST['constraint_name'][$master_field_md5] != $existrel_foreign[$master_field]['constraint']
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|| ($_REQUEST['on_delete'][$master_field_md5] != (! empty($existrel_foreign[$master_field]['on_delete']) ? $existrel_foreign[$master_field]['on_delete'] : 'RESTRICT'))
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|| ($_REQUEST['on_update'][$master_field_md5] != (! empty($existrel_foreign[$master_field]['on_update']) ? $existrel_foreign[$master_field]['on_update'] : 'RESTRICT'))
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) {
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// another foreign key is already defined for this field
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// or an option has been changed for ON DELETE or ON UPDATE
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$drop = true;
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$create = true;
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} // end if... else....
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} elseif (isset($existrel_foreign[$master_field])) {
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$drop = true;
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} // end if... else....
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$tmp_error_drop = false;
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if ($drop) {
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$drop_query = PMA_getSQLToDropForeignKey(
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$table, $existrel_foreign[$master_field]['constraint']
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);
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$display_query .= $drop_query . "\n";
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PMA_DBI_try_query($drop_query);
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$tmp_error_drop = PMA_DBI_getError();
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if (! empty($tmp_error_drop)) {
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$seen_error = true;
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$html_output .= PMA_Util::mysqlDie(
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$tmp_error_drop, $drop_query, false, '', false
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);
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continue;
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}
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}
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$tmp_error_create = false;
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if ($create) {
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$create_query = PMA_getSQLToCreateForeignKey(
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$table, $master_field, $foreign_db, $foreign_table, $foreign_field,
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$_REQUEST['constraint_name'][$master_field_md5],
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$options_array[$_REQUEST['on_delete'][$master_field_md5]],
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$options_array[$_REQUEST['on_update'][$master_field_md5]]
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);
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$display_query .= $create_query . "\n";
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PMA_DBI_try_query($create_query);
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$tmp_error_create = PMA_DBI_getError();
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if (! empty($tmp_error_create)) {
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$seen_error = true;
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if (substr($tmp_error_create, 1, 4) == '1005') {
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$message = PMA_Message::error(
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__('Error creating foreign key on %1$s (check data types)')
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);
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$message->addParam($master_field);
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$message->display();
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} else {
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$html_output .= PMA_Util::mysqlDie(
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$tmp_error_create, $create_query, false, '', false
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);
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}
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$html_output .= PMA_Util::showMySQLDocu(
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'manual_Table_types', 'InnoDB_foreign_key_constraints'
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) . "\n";
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}
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// this is an alteration and the old constraint has been dropped
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// without creation of a new one
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if ($drop && $create && empty($tmp_error_drop)
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&& ! empty($tmp_error_create)
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) {
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// a rollback may be better here
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$sql_query_recreate = '# Restoring the dropped constraint...' . "\n";
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$sql_query_recreate .= PMA_getSQLToCreateForeignKey(
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$table, $master_field,
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PMA_Util::backquote($existrel_foreign[$master_field]['foreign_db']),
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PMA_Util::backquote($existrel_foreign[$master_field]['foreign_table']),
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PMA_Util::backquote($existrel_foreign[$master_field]['foreign_field']),
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$existrel_foreign[$master_field]['constraint'],
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$options_array[$existrel_foreign[$master_field]['on_delete']],
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$options_array[$existrel_foreign[$master_field]['on_update']]
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);
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$display_query .= $sql_query_recreate . "\n";
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PMA_DBI_try_query($sql_query_recreate);
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}
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}
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} // end foreach
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if (! empty($display_query) && ! $seen_error) {
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$html_output .= PMA_Util::getMessage(
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__('Your SQL query has been executed successfully'),
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null, 'success'
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);
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}
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} // end if isset($destination_foreign)
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// U p d a t e s f o r d i s p l a y f i e l d
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if ($cfgRelation['displaywork'] && isset($display_field)) {
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$upd_query = false;
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if ($disp) {
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if ($display_field != '') {
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$upd_query = 'UPDATE '
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. PMA_Util::backquote($GLOBALS['cfgRelation']['db'])
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. '.' . PMA_Util::backquote($cfgRelation['table_info'])
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. ' SET display_field = \''
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. PMA_Util::sqlAddSlashes($display_field) . '\''
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. ' WHERE db_name = \'' . PMA_Util::sqlAddSlashes($db) . '\''
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. ' AND table_name = \'' . PMA_Util::sqlAddSlashes($table) . '\'';
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} else {
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$upd_query = 'DELETE FROM '
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. PMA_Util::backquote($GLOBALS['cfgRelation']['db'])
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. '.' . PMA_Util::backquote($cfgRelation['table_info'])
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. ' WHERE db_name = \'' . PMA_Util::sqlAddSlashes($db) . '\''
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. ' AND table_name = \'' . PMA_Util::sqlAddSlashes($table) . '\'';
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}
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} elseif ($display_field != '') {
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$upd_query = 'INSERT INTO '
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. PMA_Util::backquote($GLOBALS['cfgRelation']['db'])
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. '.' . PMA_Util::backquote($cfgRelation['table_info'])
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. '(db_name, table_name, display_field) VALUES('
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. '\'' . PMA_Util::sqlAddSlashes($db) . '\','
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. '\'' . PMA_Util::sqlAddSlashes($table) . '\','
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. '\'' . PMA_Util::sqlAddSlashes($display_field) . '\')';
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}
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if ($upd_query) {
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PMA_queryAsControlUser($upd_query);
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}
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} // end if
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// If we did an update, refresh our data
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if (isset($destination) && $cfgRelation['relwork']) {
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$existrel = PMA_getForeigners($db, $table, '', 'internal');
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}
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if (isset($destination_foreign)
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&& PMA_Util::isForeignKeySupported($tbl_storage_engine)
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) {
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$existrel_foreign = PMA_getForeigners($db, $table, '', 'foreign');
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}
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if ($cfgRelation['displaywork']) {
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$disp = PMA_getDisplayField($db, $table);
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}
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/**
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* Dialog
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*/
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// common form
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$html_output .= '<form method="post" action="tbl_relation.php">' . "\n"
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. PMA_generate_common_hidden_inputs($db, $table);
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// relations
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if ($cfgRelation['relwork']
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|| PMA_Util::isForeignKeySupported($tbl_storage_engine)
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) {
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// To choose relations we first need all tables names in current db
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// and if the main table supports foreign keys
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// we use SHOW TABLE STATUS because we need to find other tables of the
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// same engine.
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if (PMA_Util::isForeignKeySupported($tbl_storage_engine)) {
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$tab_query = 'SHOW TABLE STATUS FROM ' . PMA_Util::backquote($db);
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// [0] of the row is the name
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// [1] is the type
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} else {
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$tab_query = 'SHOW TABLES FROM ' . PMA_Util::backquote($db);
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// [0] of the row is the name
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}
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$tab_rs = PMA_DBI_query($tab_query, null, PMA_DBI_QUERY_STORE);
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$selectboxall[] = '';
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$selectboxall_foreign[] = '';
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while ($curr_table = PMA_DBI_fetch_row($tab_rs)) {
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$current_table = new PMA_Table($curr_table[0], $db);
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// explicitely ask for non-quoted list of indexed columns
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$selectboxall = array_merge(
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$selectboxall,
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$current_table->getUniqueColumns($backquoted = false)
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);
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// if foreign keys are supported, collect all keys from other
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// tables of the same engine
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if (PMA_Util::isForeignKeySupported($tbl_storage_engine)
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&& isset($curr_table[1])
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&& strtoupper($curr_table[1]) == $tbl_storage_engine
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) {
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// explicitely ask for non-quoted list of indexed columns
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// need to obtain backquoted values to support dots inside values
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$selectboxall_foreign = array_merge(
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$selectboxall_foreign,
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$current_table->getIndexedColumns($backquoted = true)
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);
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}
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} // end while over tables
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} // end if
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// Now find out the columns of our $table
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// need to use PMA_DBI_QUERY_STORE with PMA_DBI_num_rows() in mysqli
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$columns = PMA_DBI_get_columns($db, $table);
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if (count($columns) > 0) {
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foreach ($columns as $row) {
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$save_row[] = $row;
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}
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$saved_row_cnt = count($save_row);
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$html_output .= '<fieldset>'
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. '<legend>' . __('Relations'). '</legend>'
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. '<table>'
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. '<tr><th>' . __('Column') . '</th>';
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if ($cfgRelation['relwork']) {
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$html_output .= '<th>' . __('Internal relation');
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if (PMA_Util::isForeignKeySupported($tbl_storage_engine)) {
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$html_output .= PMA_Util::showHint(
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__(
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'An internal relation is not necessary when a corresponding'
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. ' FOREIGN KEY relation exists.'
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)
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);
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}
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$html_output .= '</th>';
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}
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if (PMA_Util::isForeignKeySupported($tbl_storage_engine)) {
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// this does not have to be translated, it's part of the MySQL syntax
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$html_output .= '<th colspan="2">' . __('Foreign key constraint')
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. ' (' . $tbl_storage_engine . ')';
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$html_output .= '</th>';
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}
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$html_output .= '</tr>';
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$odd_row = true;
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for ($i = 0; $i < $saved_row_cnt; $i++) {
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$myfield = $save_row[$i]['Field'];
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// Use an md5 as array index to avoid having special characters
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// in the name atttibure (see bug #1746964 )
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$myfield_md5 = md5($myfield);
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$myfield_html = htmlspecialchars($myfield);
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$html_output .= '<tr class="' . ($odd_row ? 'odd' : 'even') . '">'
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. '<td class="center">'
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. '<strong>' . $myfield_html . '</strong>'
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. '<input type="hidden" name="fields_name[' . $myfield_md5 . ']"'
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. ' value="' . $myfield_html . '"/>'
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. '</td>';
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$odd_row = ! $odd_row;
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if ($cfgRelation['relwork']) {
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$html_output .= '<td><select name="destination[' . $myfield_md5 . ']">';
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// PMA internal relations
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if (isset($existrel[$myfield])) {
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$foreign_field = $existrel[$myfield]['foreign_db'] . '.'
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. $existrel[$myfield]['foreign_table'] . '.'
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. $existrel[$myfield]['foreign_field'];
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} else {
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$foreign_field = false;
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}
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$seen_key = false;
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foreach ($selectboxall as $value) {
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$html_output .= '<option value="' . htmlspecialchars($value) . '"';
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if ($foreign_field && $value == $foreign_field) {
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$html_output .= ' selected="selected"';
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$seen_key = true;
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}
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$html_output .= '>' . htmlspecialchars($value) . '</option>'. "\n";
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} // end while
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// if the link defined in relationtable points to a foreign field
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// that is not a key in the foreign table, we show the link
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// (will not be shown with an arrow)
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if ($foreign_field && !$seen_key) {
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$html_output .= '<option value="' . htmlspecialchars($foreign_field)
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. '"'
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. ' selected="selected">' . $foreign_field . '</option>'. "\n";
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}
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$html_output .= '</select>'
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. '</td>';
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} // end if (internal relations)
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if (PMA_Util::isForeignKeySupported($tbl_storage_engine)) {
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$html_output .= '<td>';
|
|
if (!empty($save_row[$i]['Key'])) {
|
|
$html_output .= '<span class="formelement">'
|
|
. '<select name="destination_foreign[' . $myfield_md5 . ']"'
|
|
. ' class="referenced_column_dropdown">';
|
|
if (isset($existrel_foreign[$myfield])) {
|
|
// need to PMA_Util::backquote to support a dot character inside
|
|
// an element
|
|
$foreign_field = PMA_Util::backquote(
|
|
$existrel_foreign[$myfield]['foreign_db']
|
|
)
|
|
. '.' . PMA_Util::backquote(
|
|
$existrel_foreign[$myfield]['foreign_table']
|
|
)
|
|
. '.' . PMA_Util::backquote(
|
|
$existrel_foreign[$myfield]['foreign_field']
|
|
);
|
|
} else {
|
|
$foreign_field = false;
|
|
}
|
|
|
|
$found_foreign_field = false;
|
|
foreach ($selectboxall_foreign as $value) {
|
|
$html_output .= '<option value="'
|
|
. htmlspecialchars($value) . '"';
|
|
if ($foreign_field && $value == $foreign_field) {
|
|
$html_output .= ' selected="selected"';
|
|
$found_foreign_field = true;
|
|
}
|
|
$html_output .= '>' . htmlspecialchars($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) {
|
|
$html_output .= '<option value="'
|
|
. htmlspecialchars($foreign_field) . '"'
|
|
. ' selected="selected"'
|
|
. '>' . $foreign_field . '</option>' . "\n";
|
|
}
|
|
$html_output .= '</select>'
|
|
. '</span>';
|
|
|
|
// For constraint name
|
|
$html_output .= '<span class="formelement">';
|
|
$constraint_name = isset($existrel_foreign[$myfield]['constraint'])
|
|
? $existrel_foreign[$myfield]['constraint'] : '';
|
|
$html_output .= __('Constraint name');
|
|
$html_output .= '<input type="text" name="constraint_name['
|
|
. $myfield_md5 . ']"'
|
|
. ' value="' . htmlspecialchars($constraint_name) . '"/>';
|
|
$html_output .= '</span>' . "\n";
|
|
|
|
$html_output .= '<span class="formelement">';
|
|
// 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.
|
|
$on_delete = isset($existrel_foreign[$myfield]['on_delete'])
|
|
? $existrel_foreign[$myfield]['on_delete'] : 'RESTRICT';
|
|
$html_output .= PMA_generateDropdown(
|
|
'ON DELETE',
|
|
'on_delete[' . $myfield_md5 . ']',
|
|
$options_array,
|
|
$on_delete
|
|
);
|
|
$html_output .= '</span>' . "\n";
|
|
|
|
$html_output .= '<span class="formelement">' . "\n";
|
|
$on_update = isset($existrel_foreign[$myfield]['on_update'])
|
|
? $existrel_foreign[$myfield]['on_update'] : 'RESTRICT';
|
|
$html_output .= PMA_generateDropdown(
|
|
'ON UPDATE',
|
|
'on_update[' . $myfield_md5 . ']',
|
|
$options_array,
|
|
$on_update
|
|
);
|
|
$html_output .= '</span>' . "\n";
|
|
} else {
|
|
$html_output .= __('No index defined! Create one below');
|
|
} // end if (a key exists)
|
|
$html_output .= '</td>';
|
|
} // end if (InnoDB)
|
|
$html_output .= '</tr>';
|
|
} // end for
|
|
|
|
unset( $myfield, $myfield_md5, $myfield_html);
|
|
$html_output .= '</table>' . "\n"
|
|
. '</fieldset>' . "\n";
|
|
|
|
if ($cfgRelation['displaywork']) {
|
|
// Get "display_field" infos
|
|
$disp = PMA_getDisplayField($db, $table);
|
|
$html_output .= '<fieldset>'
|
|
. '<label>' . __('Choose column to display') . ': </label>'
|
|
. '<select name="display_field">'
|
|
. '<option value="">---</option>';
|
|
|
|
foreach ($save_row AS $row) {
|
|
$html_output .= '<option value="'
|
|
. htmlspecialchars($row['Field']) . '"';
|
|
if (isset($disp) && $row['Field'] == $disp) {
|
|
$html_output .= ' selected="selected"';
|
|
}
|
|
$html_output .= '>' . htmlspecialchars($row['Field'])
|
|
. '</option>'. "\n";
|
|
} // end while
|
|
|
|
$html_output .= '</select>'
|
|
. '</fieldset>';
|
|
} // end if (displayworks)
|
|
|
|
$html_output .= '<fieldset class="tblFooters">'
|
|
. '<input type="submit" value="' . __('Save') . '" />'
|
|
. '</fieldset>'
|
|
. '</form>';
|
|
} // end if (we have columns in this table)
|
|
|
|
if (PMA_Util::isForeignKeySupported($tbl_storage_engine)) {
|
|
$html_output .= '<div id="index_div" class="ajax" >'
|
|
. PMA_getHtmlForDisplayIndexes();
|
|
}
|
|
// Render HTML output
|
|
PMA_Response::getInstance()->addHTML($html_output);
|
|
|
|
/**
|
|
* 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 html code for existing value (for selected)
|
|
*
|
|
* @access public
|
|
*/
|
|
function PMA_generateDropdown(
|
|
$dropdown_question, $select_name, $choices, $selected_value
|
|
) {
|
|
$html_output = htmlspecialchars($dropdown_question) . ' '
|
|
. '<select name="' . htmlspecialchars($select_name) . '">' . "\n";
|
|
|
|
foreach ($choices as $one_value => $one_label) {
|
|
$html_output .= '<option value="' . htmlspecialchars($one_value) . '"';
|
|
if ($selected_value == $one_value) {
|
|
$html_output .= ' selected="selected" ';
|
|
}
|
|
$html_output .= '>' . htmlspecialchars($one_label) . '</option>' . "\n";
|
|
}
|
|
$html_output .= '</select>' . "\n";
|
|
|
|
return $html_output;
|
|
}
|
|
|
|
/**
|
|
* Split a string on backquote pairs
|
|
*
|
|
* @param string $text original string
|
|
*
|
|
* @return array containing the elements (and their surrounding backquotes)
|
|
*
|
|
* @access public
|
|
*/
|
|
function PMA_backquoteSplit($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);
|
|
}
|
|
|
|
/**
|
|
* Returns the DROP query for a foreign key constraint
|
|
*
|
|
* @param string $table table of the foreign key
|
|
* @param string $fk foreign key name
|
|
*
|
|
* @return string DROP query for the foreign key constraint
|
|
*/
|
|
function PMA_getSQLToDropForeignKey($table, $fk)
|
|
{
|
|
return 'ALTER TABLE ' . PMA_Util::backquote($table)
|
|
. ' DROP FOREIGN KEY ' . PMA_Util::backquote($fk) . ';';
|
|
}
|
|
|
|
/**
|
|
* Returns the SQL query for foreign key constraint creation
|
|
*
|
|
* @param string $table table name
|
|
* @param string $field field name
|
|
* @param string $foreignDb back-quoted foreign database name
|
|
* @param string $foreignTable back-quoted foreign table name
|
|
* @param string $foreignField back-quoted foreign field name
|
|
* @param string $name name of the constraint
|
|
* @param string $onDelete on delete action
|
|
* @param string $onUpdate on update action
|
|
*
|
|
* @return string SQL query for foreign key constraint creation
|
|
*/
|
|
function PMA_getSQLToCreateForeignKey($table, $field, $foreignDb, $foreignTable,
|
|
$foreignField, $name = null, $onDelete = null, $onUpdate = null
|
|
) {
|
|
$sql_query = 'ALTER TABLE ' . PMA_Util::backquote($table) . ' ADD ';
|
|
// if user entered a constraint name
|
|
if (! empty($name)) {
|
|
$sql_query .= ' CONSTRAINT ' . PMA_Util::backquote($name);
|
|
}
|
|
|
|
$sql_query .= ' FOREIGN KEY (' . PMA_Util::backquote($field) . ')'
|
|
. ' REFERENCES ' . $foreignDb . '.' . $foreignTable
|
|
. '(' . $foreignField . ')';
|
|
|
|
if (! empty($onDelete)) {
|
|
$sql_query .= ' ON DELETE ' . $onDelete;
|
|
}
|
|
if (! empty($onUpdate)) {
|
|
$sql_query .= ' ON UPDATE ' . $onUpdate;
|
|
}
|
|
$sql_query .= ';';
|
|
|
|
return $sql_query;
|
|
}
|
|
?>
|